EP0302994B1 - A manually operated trigger type dispenser, method of assembling the same, and a spinner for use in the dispenser - Google Patents
A manually operated trigger type dispenser, method of assembling the same, and a spinner for use in the dispenser Download PDFInfo
- Publication number
- EP0302994B1 EP0302994B1 EP88104555A EP88104555A EP0302994B1 EP 0302994 B1 EP0302994 B1 EP 0302994B1 EP 88104555 A EP88104555 A EP 88104555A EP 88104555 A EP88104555 A EP 88104555A EP 0302994 B1 EP0302994 B1 EP 0302994B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- dispenser
- piston
- nozzle
- dispenser body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1001—Piston pumps
- B05B11/1004—Piston pumps comprising a movable cylinder and a stationary piston
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/12—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means capable of producing different kinds of discharge, e.g. either jet or spray
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
- B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
- B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
- B05B1/3415—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with swirl imparting inserts upstream of the swirl chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1001—Piston pumps
- B05B11/1009—Piston pumps actuated by a lever
- B05B11/1011—Piston pumps actuated by a lever without substantial movement of the nozzle in the direction of the pressure stroke
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1095—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle with movable suction side
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
- B05B7/005—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam wherein ambient air is aspirated by a liquid flow
- B05B7/0056—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam wherein ambient air is aspirated by a liquid flow with disturbing means promoting mixing, e.g. balls, crowns
Definitions
- This invention relates to a manually operated trigger type dispenser which is adapted to be detachably attached to a liquid container, comprises a trigger and a cylinder having a pump chamber, said trigger being squeezed to suck up the liquid from the container into the pump chamber and to pressurize the liquid, so as to dispense the liquid.
- the invention also relates to a method of assembling this manually operated trigger type dispenser.
- the conventional manually operated trigger type dispenser comprises a dispenser body which is adapted to be detachably attached to the neck of a liquid container.
- the dispenser body is molded of synthetic resin such as polyethylene, and includes an upper portion and a lower portion.
- An actuating lever, or a trigger, is swingably pivoted to the upper portion of the dispenser body.
- the lower portion of the dispenser body is cylindrical, and adapted to be attached to the neck of the liquid container, either directly or by a cap. The lower portion extends from the upper portion, substantially at right angles to the upper portion.
- a cylinder defining a pump chamber is incorporated in the dispenser body.
- An inlet conduit, which communicates with the pump chamber is provided within the dispenser body, and has an axis extending vertically.
- An outlet conduit, which communicates with pump chamber, is provided within the dispenser body.
- the inlet conduit is formed in the lower portion of the dispenser body and extends almost vertically
- the outlet conduit is formed in the upper portion of the dispenser body and extends almost horizontally.
- the axes of the inlet and outlet conduits intersect with each other, substantially at right angles.
- the cylinder is integrally molded with the upper portion of the dispenser body, and is coaxial with the outlet conduit.
- a piston is provided within the cylinder and coupled to the trigger. This piston reciprocates in a substantially horizontal direction as the trigger is squeezed and released.
- U.S. Patent 3,840,157 Hellenkamp
- U.S. Patent 4,227,650 McKinney
- another trigger type dispenser which comprises an upper dispenser body portion having a substantially horizontal, cylindrical portion having an outlet conduit, a cylinder integrally molded with the upper dispenser body portion and extending vertically therefrom, and a piston provided within the cylinder and being able to move up and down.
- an inlet conduit is formed within the piston, not in the lower dispenser body portion. Nonetheless, the axis of the cylinder, which is integrally molded with the upper dispenser body portion, intersects at right angles with the axis of the outlet conduit.
- any type of a trigger type dispenser has a nozzle cap attached to the distal end of the nozzle, and a spinner interposed between the nozzle, and the nozzle cap.
- the spinner used in the conventional dispensers is a bottomed cylinder made of synthetic resin.
- a recess is cut in the center of the distal-end surface of the spinner.
- a pair of grooves are cut in the distal-end surface, and extend tangent to the recess.
- Two through holes are cut in the bottom of the spinner and extend in parallel to the axis of the spinner. These through holes connect the grooves to the fluid passage of the nozzle.
- An orifice is made in the center of the nozzle cap, and is coaxial with the recess of the spinner.
- the dispenser of the invention is claimed in claim 4 and its method for assembling in claim 1.
- neither an inlet conduit nor an outlet conduit is formed in the dispenser body and a piston and a cylinder are not integrally molded with the dispenser body.
- the dispenser body comprises an upper portion and a lower portion vertically extending from the upper portion.
- the piston is substantially L-shaped, comprising a horizontal nozzle fixed to the upper portion of the dispenser body, and a piston body located at the lower portion of the dispenser body.
- the cylinder is coupled with a swingable trigger and located at the lower portion of the dispenser body; it can reciprocate when the trigger is squeezed and released.
- the inlet conduit is formed within the cylinder, whereas the outlet conduit is provided within the piston.
- a slit is cut in the front section of the lower body portion. Thanks to this slit, the lower portion of the dispenser body is resiliently fitted in a bottle cap and, thus, connected thereto. The rear end of the trigger and the nozzle of the piston can pass through this slit.
- the piston is engaged with the cylinder, and supports the cylinder in its lower position. i.e., the non-operation position of the cylinder.
- Fig. 1 shows a manually operated trigger type dispenser 10 according to this invention.
- the dispenser 10 comprises a dispenser body 12 made of synthetic resin, such as polyethylene, by means of injection molding.
- the dispenser body 12 includes an upper body portion 14 and a lower body portion 16.
- the lower body portion 16 extends from the upper body portion 14 in a substantially vertical direction.
- the lower end of this body portion 16 is adapted to be detachably connected to the neck 19 of a container 18 containing the liquid to be dispensed, by means of a bottle cap 20.
- the dispenser 10 further comprises a cylinder 22, a piston 24, and a trigger 26.
- the cylinder, the piston, and the trigger are made of synthetic resin by means of injection molding.
- the upper body portion 14 comprises a top portion 14a and a pair of side walls 14b.
- the side walls 14b are integrally molded with the top portion 14a and extend downward from the lateral edges of top portion 14a.
- the piston 24 is arranged in the gap between these side walls 14b, and the trigger 26 is swingably pivoted to the piston 24, not to the dispenser body 12.
- the lower body portion 16 has a slit 28 in the front. The lower end of the body portion 16 is therefore resiliently bendable.
- An engagement means 32 which is adapted to fit the lower end of the body portion 16 into the proximal end 30 of a bottomed bottle cap, is formed on the lower body portion 16, as is illustrated in Fig. 3.
- the engagement means 32 is formed of a first engagement member 34 and a second engagement member 36.
- the first engagement member 34 is a rib formed on the rear side of the lower body portion 16 and extends parallel to the axis of the lower body portion 16.
- the second engagement member 36 is a flange protruding from the lower end of the body portion 16; it is positioned below the first engagement member 34 such that the proximal end 30 of the bottle cap 20 is clamped between the engagement members 34 and 36.
- the second engagement member 36 has a lower surface 38 which is inclined, and an upper surface 39 which is horizontal and parallel to the lower surface of the proximal end 30 of the bottle cap. That portion of the second engagement member 36 which is right below the first engagement members 34 has a large notch, whereby the engagement means 32 can easily be molded.
- the engagement members 34 and 36 can have shapes other than those shown in Figs. 2 and 3.
- the bottle cap 20 has an internally threaded portion.
- the neck 19 of the container 18 has an externally threaded portion.
- the threaded portion of the bottle cap 20 can be put in screw engagement with the threaded portion of the neck 19 so that the bottle cap 20 may be detachably connected to the neck 19 of the container 18.
- a sealing collar 42 is provided within the bottle cap 20.
- An annular groove is cut in the top of the sealing collar 42, thus defining an inner ring 42a and an outer ring 42b which are concentric.
- the lower end of the lower body portion 16 is fitted in the annular groove of the sealing collar 42, that is, in the gap between the rings 42a and 42b of the collar 42.
- the upper end of the sealing collar 42 is clamped between the lower end of the lower body portion 16 and the upper end of the neck 19, whereby the lower body portion 16 is coupled to the container 18 in watertight fashion.
- a depression 43 is cut in the inner periphery of the lower end of the lower body portion 16, and a projection 44 is fitted in the depression 43, the sealing collar 42 remains coupled to the lower body portion 16 even before the bottle cap 20 is put into screw engagement with the neck 19 of the container 18.
- the depression 43 can be cut in the outer periphery of the inner ring 42a, in which case the projection 44 must be formed on the inner periphery of the lower end of the lower body portion 16.
- the bottle cap 20 is pressed onto the lower body portion 16. Then, the proximal end 30 of the bottle cap 20 is guided by the lower surface 38 of the second engagement member 36, while slightly collapsing the lower end of the lower body portion 16, and slips into the gap between the first engagement member 34 and the second engagement member 36. As soon as the proximal end 30 slips into the gap between the members 34 and 36, the lower end of the lower body portion 16 restores its original shape.
- the first engagement member 34 prevents the proximal end 30 from moving further upward.
- the upper surface 39 of the second engagement member 36 prevents the proximal end 30 from moving downward.
- Both the bottle cap 20 and the sealing collar 42 are connected to the dispenser body 12 before the bottle cap 20 is put into screw engagement with the neck 19 of the container 18. As will be later described, the bottle cap 20 and the sealing collar 42 are attached to the dispenser body 12, together with the piston 24, the trigger 26, and the cylinder 22.
- a pair of engagement members 68 protrude from the back of the trigger 26, so as to abut on the stepped portion 70 of the cylinder 22. Therefore, when the trigger 26 is squeezed and swung in the direction of the arrow, as is shown in Fig. 1, the cylinder 22 is moved upward from its non-operation position (i.e., its initial position), along the piston 24. When the trigger 26 is released, it returns to its initial position due to the force of a return spring (later described).
- the sealing collar 42 has a slender cylindrical portion 71 loosely fitted in the small-diameter section 58 of the cylinder 22. The cylinder 22 is guided by this cylindrical portion 71, and reciprocated.
- the cylinder 22 has an open upper end.
- the body of the piston 24, i.e., piston body 72 has its lower end inserted in the cylinder 22.
- a flared seal 74 is integrally molded with the lower end of the piston body 72.
- the flared seal 74 is in sliding contact with the inner periphery of the cylinder 22, and thus guides the cylinder 22 upward and downward.
- the return spring 76 for example, a compression coil spring, is inserted in the cylinder 22, with its upper end abutting on the stepped portion 77 of the piston body 72.
- An annular engagement member 78 which has a hook-shaped cross section, is integrally formed with the upper end of the cylinder 22, and slightly extends outwardly. As will be described later, the annular engagement member 78 engages with a hook-shaped support member integrally formed with the piston 24. Therefore, the cylinder 22 is supported by the piston 24 and located in its initial position.
- Engagement cylinder 90 extends upward from the upper edge of the nozzle 79. This cylinder 90 is coaxial with the connecting cylinder 84.
- a support cylinder 92 extends downward from the rear end of the nozzle 79, coaxially with the piston body 72. As is clearly shown in Fig. 9, the left half (i.e., the front section) of the support cylinder 92 is cut away.
- a hook-shaped engagement member 94 is formed integrally with the lower end of the support cylinder 92. This member 94 is arcuate, and its hook portion protrudes from the inner periphery of the cylinder 92 and consists of two portions spaced apart from each other.
- a pair of plates 98 are integrally formed with a hinge 99 which is the middle portion of nozzle 79.
- a pair of hooks 97 which can engage with the proximal end 30 of the bottle cap 20, are formed integrally with the lower ends of the hinged plates 98.
- a hole 100 is made in each lower end portion of the plate 98. Around the axis of this hole 100, the trigger 26 is swung. Two guide recesses 101 are cut in those portions of the plates 98 which are located below the hole 100.
- the pins 69 protrude from the inner surfaces of the parallel walls of the trigger 26, and the holes 100 are made in the plates 98 of the nozzle 79.
- the pins 69 can be formed on the inner surfaces of the plates 98, and the holes 100 can be cut in the parallel walls of the trigger 26.
- Both plates 98 can be rotated, with the hinge 99 acting as a fulcrum. More specifically, the piston 24 molded, with the plates 98 extending horizontally as is indicated by the one-dot chain lines in Fig. 11. These plates 98 are rotated downwardly until they are positioned vertically and parallel to each other. The plates 98 must be spaced apart for such a distance that the pins 69 of the trigger 26 are reliably fitted into the holes 100. To set the plates 98 apart for this distance, an engagement cylinder 102 protrudes from the inner surface of one of the plates 98, and an engagement projection 103 protrudes from the inner surface of the other plate 98 and is fitted in the engagement cylinder 102. Therefore, the trigger 26 is pivotally attached to the piston 24 reliably.
- the pair of plates 98 can be spaced apart from each other for the specific distance, in any other way than has been described above.
- the nozzle 79 When the nozzle 79 is pushed up into the dispenser body 12, with engagement cylinder 106 axially aligned with the engagement cylinder 90 of the body 12, the cylinder 106 is fitted into the cylinder 90, and the engagement projections 105 are fitted into the engagement recesses 14c, respectively.
- the nozzle 79 is attached to the dispenser body 12, being supported at two points, i.e., its front-end portion and its rear-end portion, as is illustrated in Fig. 1. No play is allowed between the dispenser body 12 and the nozzle 79.
- the cap 110 When the cap 110 is rotated in the opposite direction, it moves backward with respect to the nozzle 79. Hence, the gap between the bottom of the nozzle cap 110 and the distal end of the spinner 112 can be adjusted by rotating the nozzle cap 110, whereby the pressurized liquid can be ejected from the orifice 113, in the form of either a spray stream or a jet stream.
- the spinner 112 which is interposed between the nozzle 79 and the nozzle cap 110, is made of a synthetic resin.
- a pair of liquid passages 114 (blind holes) are cut in the rear surface of the bottom of the spinner 112. These passages 114 extend parallel to the axis of the spinner 112 and set apart by 180° in the circumferential direction of the spinner 112.
- the liquid passages 114 have a circular section. Nonetheless, one or, three or more liquid passages having any other cross section can be cut in the spinner 112, and can be differently spaced apart in the circumferential direction of the spinner 112. As is shown in Figs.
- a circular recess 118 is made in the center of the distal surface of the spinner 112. This recess 118 communicates with, and is coaxial with, the orifice 113.
- the circular recess 118 communicates with the liquid passages 114, at its circumference.
- a flared seal 120 extends from the distal end of the spinner 112 and slidably contacts the inner periphery of the nozzle cap 110, whereby the cap 110 and the spinner 112 are coupled in liquid-tight fashion.
- a venting means In order to prevent liquid-locking from occurring within the container 18, a venting means must be provided. Therefore, as is shown in Fig. 1, the stepped portion 130 of the sealing collar 42, and the stepped portion 132 of the small-diameter section 58 of the cylinder 22 are chamfered such that these chamfered portions 130 and 132 constitute a venting means.
- the venting means secure airtight connection between the cylinder 22 and the container 18, in spite of its simple structure.
- trigger 26 is squeezed, and the cylinder 22 is moved upward from its initial position, the stepped portion 132 moves away from the stepped portion 130 of the sealing collar 42.
- a gap is formed between the small-diameter section 58 and the cylindrical portion 71 of the sealing collar 42.
- the interior of the container 18 communicates with the atmosphere via this gap, whereby air flows into the container 18 through the gap, thereby preventing liquid-locking within the container 18.
- the secondary valve 88 is mounted on the upper end of the cylinder body 72; the primary valve 64, the return spring 76, and the piston body 72 are then contained in the cylinder 22; finally, the cylinder 22 is pushed onto the nozzle 79.
- the hook-shaped engagement member 94 pushed by the annular engagement member 78 of the cylinder 22 and is thus bent outward in the radial direction of the support cylinder 92.
- the member 94 bends by itself to return to its initial position, due to its elasticity, and thus engages with the member 78 of the cylinder 22.
- the hook-shaped engagement member 94 is sufficiently elastic, so that the annular engagement member 78 can easily engages with the member 94 even when the cylinder 22 is pushed up with a small force.
- the spinner 112 and nozzle cap 110 are aligned along the horizontal axis 136 of the piston 24.
- the nozzle cap 110 is mounted on the nozzle 79 and rotated, so as to come into screw engagement with the externally threaded portion 108 of the nozzle 79.
- the nozzle cap 110 is mounted on the distal end of the nozzle 79, and the spinner 112 is incorporated into the nozzle 79.
- the outlet conduit 80 which extends at right angles to the axis of the lower body portion 16, is not formed in the dispenser body 12.
- the dispenser body 12 can be injection-molded, only by moving the movable half of the mold, without the necessity of using cores designed for forming the outlet conduit 80.
- Three or more rows of cavities can, therefore, be cut in the stationary half of the mold, in contrast to the stationary mold 204 for forming the body of the known trigger type dispenser, which has only two rows of cavities 202, spaced apart in the direction of arrow Y, as is illustrated in Fig. 19.
- more dispenser bodies 12 can be molded in each injection cycle.
- the rectangles drawn in one-dot chain lines represent additional cavities 202 formed in the stationary mold 204 for forming the dispenser bodies 12.
- the dispenser body 12 is simple in structure, it can be molded within a short injection cycle, and many dispenser bodies can be molded in each injection cycle. Hence, the dispenser body 12 can be manufactured in great quantities. Moreover, the cavities of the mold for forming the dispenser body 12 have a simple shape, the mold can be made at low cost.
- the piston 24 can be molded, with the plates 98 extending horizontally as is indicated by the one-dot chain lines in Fig. 11. Therefore, it suffices to cut two shallow cavities in the mold for forming the nozzle 79, both being located near the parting line of the mold.
- the piston 24 can be easily molded and, thus, in great quantities. Since the mold for forming the piston 24 has a simple structure, it can be manufactured at low cost.
- the piston 24 is incorporated in the dispenser body 12, whereas the cylinder 22 is moved upward when the trigger 26 is squeezed, and is moved downward when the trigger 26 is released.
- the cylinder 22 can be fixed within the dispenser body 12, and the piston 24 can be moved up and down when the trigger 26 is squeezed and released. This is because the cylinder 22 having the inlet conduit 60, and the piston 24 having the outlet conduit 80 are molded separatedly from the dispenser body 12, thereby making it possible to mold the body 12 in great quantities.
- the piston 24, the cylinder 22, and the trigger 26 are aligned coaxially, and the cylinder 22 and the trigger 26 are attached to the piston 24, thereby easily forming the inner-element assembly 138.
- the inner-element assembly 138 cannot be disintegrated easily.
- the dispenser 10 can be completed, by merely pushing the bottle cap 20, the sealing collar 42, and the assembly 138 onto the dispenser body 12, while keeping them in axial alignment with the dispenser body 12.
- the dispenser body 12 can be molded in large quantities, regardless of whether the cylinder 22 or the piston 24 is movable. However, since the movable element must be held in the initial position while the dispenser 10 is being assembled, it is desirable that the cylinder 22 be movable as in the above embodiment.
- the inner-element assembly 138 can be assembled easily and quickly, only if the cylinder 22, the piston 24, and the trigger 26 have been aligned coaxially with one another. Once the assembly 138 has been thus formed, the dispenser 10 can be assembled, merely by aligning the dispenser body 12, the assembly 138, the bottle cap 20, and the sealing collar 42 coaxially with one another, and then couple them together. Obviously, the dispenser 10 can be assembled easily and quickly.
- the cylinder 22 remains firmly attached to the piston 24 since the annular engagement member 78 of the cylinder 22 engages with the hook-shaped engagement member 94 of the piston 24.
- the assembly 138 can hardly be disintegrated while it is being stored or transported.
- the bottle cap 20 and the sealing collar 42 have relatively simple structures. They can be easily be made by injection molding, like the dispenser body 12. Besides, as has been explained, the dispenser body 12, the bottle cap 20, the sealing collar 42, and the inner-element assembly 138 can be coupled together, thus assembling the dispenser 10, by either pushing down the body 12 or pulling up the sealing collar 42. In short, it is not technically difficult to injection-molding the components of the dispenser 10, or to connecting these components, thereby to manufacture the dispenser 10. In view of this fact, the trigger type dispenser 10 according to the present invention can be manufactured easily in the industrially developing countries, as well as the industrially advanced countries.
- the dispenser 10 can be manufactured in these remote factories in a knock-down scheme, that is, by coupling the assembly 138 and the other unfinished products, i.e., the bottle cap 20 and the sealing collar 42, with the dispenser body 12.
- knock-down manufacture of products does not require skilled labor.
- the trigger type dispenser 10 according to this invention can be manufactured in the knock-down scheme, even in those regions where skilled labor is hard to obtain.
- the inner-element assembly 138 can be modified, thereby to provide various types of dispensers.
- a tip having a foamed rubber screen, a meshed screen, or the like can be attached to the nozzle cap 110, in which case a foaming-type dispenser can be provided.
- a foaming-type dispenser can be provided.
- the dispenser 10 according to the present invention is completed when the suction tube 66 is fitted in the small-diameter section 58 of the cylinder 22. Needless to say, the suction tube 66 can be made easily, and can be fitted easily into the small-diameter section 58.
- the nozzle cap 110 and the spinner 112 are combined, constituting a mechanism 140 for switching the pattern in which the pressurized liquid flows from the orifice 113.
- the inner cylinder 122 enters the circular recess 118 of the spinner 112, and the free end of this cylinder 122 contacts the bottom 119 of the recess 118, as is illustrated in Fig. 13.
- the liquid passages 114 are close, whereby the orifice 113 is disconnected from the outlet conduit 80 of the nozzle 79.
- the pressurized liquid is therefore completely prevented from flowing from the passages 114 into the orifice 113 via the circular recess 118.
- the liquid never leaks even if the trigger 26 is squeezed by error.
- the residual liquid if any in the passages 114, dose not leak, either.
- the cap 110 can be set in its off-position, so as to prevent the pressurized liquid from leaking. Namely, the nozzle cap 110 can be set easily in the off-position.
- the nozzle cap 110 can cooperate with the spinner 112 to prevent the pressurized liquid from leading via the orifice 113 even if the trigger 26 is squeezed by mistake. Therefore, unlike the conventional trigger type dispenser, the dispenser 10 according to this invention need not be provided with a trigger-locking mechanism or a plug means for closing the orifice 113.
- the dispenser 10 according to the present invention is, thus, less complex in structure than the conventional one, and is superior to the conventional dispenser in terms of outer appearance.
- the nozzle cap 110 is in screw engagement with the externally threaded portion 108 of the nozzle 79, and moves back and forth when rotated. Instead, the nozzle cap 110 can be in sliding contact with the nozzle 79.
- the trigger type dispenser 10 is transported for sale, with the nozzle cap 110 is held in the off-position, if the dispenser 10 is connected to the container 18 filled with a liquid.
- the nozzle cap 110 is rotated, thereby moving it from its off-position to the left (Fig. 1). Then, as is shown in Fig. 20, the inner cylinder 122 of the cap 110 is slightly moved away from the bottom 119 of the circular recess 118 of the spinner 112. As a result, the outlet conduit 80 of the nozzle 79 is connected to the orifice 113 via the gap between the bottom 119 and the cylinder 122. In this condition, the liquid passages 114 communicate with the circular recess 118 as is illustrated in Fig. 15.
- a part of the liquid flowing from the passages 114 into the circular recess 118 intends to flow along the outer periphery of the inner cylinder 122 and then through the gap between the inner surface of the distal end of the cap 110 and the distal end of the spinner 112.
- the flared seal 120 blocks the flow of the liquid.
- the nozzle cap 110 is rotated until the inner cylinder 122 abuts on the bottom 119 of the circular recess 118. Then, the cap 110 can no longer be moved father to the right. It is at this moment that the nozzle cap 110 reaches the off-position. The user can easily know that the cap 110 has been set in the off-position.
- the flowing-pattern switching mechanism 140 can not only change the flowing-pattern of the liquid quickly, but also reliably set the nozzle cap 110 in the off-position.
- a stopper mechanism for inhibiting the cap 110 from further rotating after it has assumed the off-position As is indicated in Fig. 22, a thin disc 114 having a stopper 143 is mounted on the nozzle 79 right behind the externally threaded portion 108. Assuming that the portion 108 is a right-handed screw, the upper edge 143a of the stopper 143 is inclined to the disc 144, and the lower edge thereof extends perpendicular to the disc 144. As is shown in Fig. 23, the nozzle cap 110 has a flange 146 connected the rear. This flange 146 has a slit, and thus has two ends 146a and 146b. The upper end 146a is inclined, whereas the lower end 146b extends in the radial direction of the flange 146.
- Fig. 24 shows a modification of the nozzle cap 110, which is designed to foam a liquid.
- this nozzle cap 149 has an extension cylinder 150 projecting forward from the bottom 109.
- a truncated conical, hollow cylinder 152 is provided within the extension cylinder 150 and molded integrally therewith.
- the cylinder 152 allows the passage of the central portion of the liquid stream ejected from the orifice 113, and blocks the other portion of the liquid stream.
- four air-inlet ports 154 are cut in the bottom 109 of the nozzle cap 149, and spaced apart at regular intervals in the circumferential direction of intermediate cylinder 124.
- the shape, number, and position of the air-inlet ports 154 are not limited to those shown in Fig. 25.
- the central portion of the liquid stream ejected from the orifice 113 passes through the opening of the cylinder 152, whereas the other portion of the liquid stream abuts on the inclined inner periphery of the cylinder 152 and change into tiny liquid particles.
- the air supplied into the cylinder 152 through the air-inlet ports 154 mixes these tiny liquid particles with the centeral portion of the liquid stream, whereby the liquid is foamed.
- the air-inlet ports 154 and the cylinder 152 extend along the axis of the nozzle cap 149. Therefore, the mold for forming the nozzle cap 149 is simple in structure. Therefore, the nozzle cap 149 can be molded easily and, hence, at low cost.
Landscapes
- Closures For Containers (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Description
- This invention relates to a manually operated trigger type dispenser which is adapted to be detachably attached to a liquid container, comprises a trigger and a cylinder having a pump chamber, said trigger being squeezed to suck up the liquid from the container into the pump chamber and to pressurize the liquid, so as to dispense the liquid. The invention also relates to a method of assembling this manually operated trigger type dispenser.
- The conventional manually operated trigger type dispenser comprises a dispenser body which is adapted to be detachably attached to the neck of a liquid container. The dispenser body is molded of synthetic resin such as polyethylene, and includes an upper portion and a lower portion. An actuating lever, or a trigger, is swingably pivoted to the upper portion of the dispenser body. The lower portion of the dispenser body is cylindrical, and adapted to be attached to the neck of the liquid container, either directly or by a cap. The lower portion extends from the upper portion, substantially at right angles to the upper portion. A cylinder defining a pump chamber is incorporated in the dispenser body. An inlet conduit, which communicates with the pump chamber, is provided within the dispenser body, and has an axis extending vertically. An outlet conduit, which communicates with pump chamber, is provided within the dispenser body.
- More specifically, the inlet conduit is formed in the lower portion of the dispenser body and extends almost vertically, whereas the outlet conduit is formed in the upper portion of the dispenser body and extends almost horizontally. Hence, the axes of the inlet and outlet conduits intersect with each other, substantially at right angles.
- The cylinder is integrally molded with the upper portion of the dispenser body, and is coaxial with the outlet conduit. A piston is provided within the cylinder and coupled to the trigger. This piston reciprocates in a substantially horizontal direction as the trigger is squeezed and released.
- As is disclosed in, for example, U.S. Patent 3,840,157 (Hellenkamp) and U.S. Patent 4,227,650 (McKinney), another trigger type dispenser is known which comprises an upper dispenser body portion having a substantially horizontal, cylindrical portion having an outlet conduit, a cylinder integrally molded with the upper dispenser body portion and extending vertically therefrom, and a piston provided within the cylinder and being able to move up and down. In this dispenser, an inlet conduit is formed within the piston, not in the lower dispenser body portion. Nonetheless, the axis of the cylinder, which is integrally molded with the upper dispenser body portion, intersects at right angles with the axis of the outlet conduit.
- As is disclosed in, for example, U.S. Patant 4,371,097 (O'Neil), still another trigger type dispenser is known in which the piston is incorporated in the dispenser body and the cylinder vertically reciprocates along the piston. In this dispenser, the outlet conduit is formed in the upper portion of the dispenser body, whereas the inlet conduit is formed in the lower portion of the dispenser body. A cylindrical portion, whose axis extends at right angles to the axis of the outlet conduit, extends vertically from the upper dispenser body portion.
- The cylinder, the piston, the trigger, the cap, and the like -- all being main components of any conventional dispenser described above -- are made of synthetic resin by injection molding, like the dispenser body.
- The molding of the dispenser body of any prior art trigger type dispenser described above is accompanied by the following problems.
- Were the dispenser body a single cylindrical component, it could be easily molded, merely by moving a movable mold with respect to a stationary mold. Actually, however, the dispenser body is a combination of two cylindrical components, extending at right angles to each other, i.e., the upper and lower cylindrical body portions, the upper body portions, the upper body portion and the cylinder, or the upper body portion and the cylindrical portion. Therefore, during the molding process, cores must be moved vertically in the plane perpendicular to the direction in which the movable mold is moved. In other words, the cores must be moved in the direction of arrow Y shown in Fig. 19, or in the direction opposite to arrow Y. Consequently,
cavities 202, each for molding a dispenser body, cannot be arranged in more than two rows, spaced apart in the direction of arrow Y, instationary mold 204, as is shown Fig.19. No cavities can be formed in that portion ofmold 204 which lies between those two portions in which the two rows ofcavities 202 are made. The number of dispenser bodies, which can be molded in each injection cycle, is inevitably limited. - The dispenser body is more complex in structure than the other components of the dispenser, such as the piston and the trigger. Molten plastic material is injected into
cavities 202 under a high pressure. Nevertheless, the pastic material cannot fill upcavities 202 quickly, because of the complex shape ofcavities 202, which increases the injection time. In addition, some time is required to move the cores. As a consequence, the injection cycle is prolonged, making it difficult to mass-produce the dispenser body. Furthermore since thecavities 202 have a complex shape, the movable and stationary molds cannot be manufactured at low cost. - In order to manufacture a trigger type dispenser at low cost, it is necessary not only to produce a simple dispenser body in large quantitites, but also to put the dispenser body together with the other components within a short time. The components of the conventional dispenser, such as the trigger, the piston, the cylinder, and the cap, cannot be easily fitted into or coupled with, the dispenser body. Thus the prior art dispenser cannot be assembled within a sufficiently short time.
- Most trigger type dispensers has a return spring which is interposed between the piston and the cylinder. Hence, the piston (or the cylinder, in the dispenser disclosed in U.S. Patent 4,371,097), which is movable, is pushed outward by the return spring, and is separated from the cylinder in some cases. None of the conventional trigger type dispensers have a unit comprising a piston, a cylinder and a return spring -- all put together, not separated from one another. As a consequence, the prior art dispensers must be assembled in the same factory, from the first step to the last step. In other words, they cannot be manufactured in a knock-down scheme.
- Any type of a trigger type dispenser has a nozzle cap attached to the distal end of the nozzle, and a spinner interposed between the nozzle, and the nozzle cap. The spinner used in the conventional dispensers is a bottomed cylinder made of synthetic resin. A recess is cut in the center of the distal-end surface of the spinner. A pair of grooves are cut in the distal-end surface, and extend tangent to the recess. Two through holes are cut in the bottom of the spinner and extend in parallel to the axis of the spinner. These through holes connect the grooves to the fluid passage of the nozzle. An orifice is made in the center of the nozzle cap, and is coaxial with the recess of the spinner.
- When the trigger is squeezed, the liquid pressurized within the cylinder flows into the recess of the spinner through the liquid passage, the through holes, and the grooves. Since the grooves extend tangent to the recess, the liquid swirls as it flows from the grooves into the recess, and is collected at the center of the recess, and is dispensed through the orifice of the nozzle cap.
- A trigger type dispenser is known, wherein an annular space is provided between the spinner and the inner periphery of the nozzle, instead of forming two through holes in the spinner. This annular space functions as a liquid passage, through which the pressurized liquid flows from the nozzle into the tangential grooves of the spinner.
- As has been pointed out, the spinner for use in the prior art trigger type dispensers has a recess extending in the axial direction of the spinner, and two grooves extending tangent to the recess, said recess and said grooves all being cut in the distal-end surface of the spinner. The mold for forming this spinner is equally complicated in structure and cannot be manufactured at low cost. Moreover, during the molding process, the molten material cannot fill up the complex cavity of the mold within a short period of time, making it impossible to manufacture the spinner in large quantities or at low cost.
- Another problem is inherent in the conventional trigger type dispensers. The liquid passage of the nozzle is always connected to the orifice communicating with the atmosphere, by the tangential grooves and the recess of the spinner. Therefore, when the trigger is squeezed by mistake, the liquid is likely to leak through the passage of the nozzle and the orifice of the nozzle cap. Even if the trigger has been locked, the liquid passage of the nozzle remains open to the atmosphere, and the liquid remaining in the spinner and the nozzle, will unavoidably leak from the nozzle.
- A dispenser of the type of the opening part of
claim 4 and a method of the opening part of claim 1 are described in EP-A-0224 610. - It is object of the present invention to allow a rapid and easy assembling by using simple elements.
- Accordingly it is primary object of the present invention to provide a manually operated trigger type dispenser which comprises a dispenser body able to be manufactured in large quantities and which can therefore be manufactured in a knock-down scheme.
- It is another object of this invention to provide a method of assembling a manually operated trigger type dispenser in a knock-down scheme.
- The dispenser of the invention is claimed in
claim 4 and its method for assembling in claim 1. - To achieve the primary object of the invention neither an inlet conduit nor an outlet conduit is formed in the dispenser body and a piston and a cylinder are not integrally molded with the dispenser body.
- The dispenser body comprises an upper portion and a lower portion vertically extending from the upper portion. The piston is substantially L-shaped, comprising a horizontal nozzle fixed to the upper portion of the dispenser body, and a piston body located at the lower portion of the dispenser body. The cylinder is coupled with a swingable trigger and located at the lower portion of the dispenser body; it can reciprocate when the trigger is squeezed and released. The inlet conduit is formed within the cylinder, whereas the outlet conduit is provided within the piston. A slit is cut in the front section of the lower body portion. Thanks to this slit, the lower portion of the dispenser body is resiliently fitted in a bottle cap and, thus, connected thereto. The rear end of the trigger and the nozzle of the piston can pass through this slit. The piston is engaged with the cylinder, and supports the cylinder in its lower position. i.e., the non-operation position of the cylinder.
- Other objects, advantages and novel features of the invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
- Fig. 1 is a longitudinal sectional view schematically showing a manually operated trigger type dispenser according to the present invention;
- Fig. 2 is a perspective view of the dispenser body of the trigger type dispenser shown in Fig. 1;
- Fig. 3 is a perspective view of the dispenser body and a bottle cap in which the lower end of the dispenser body is fitted, said bottle cap being partly cut away;
- Fig. 4 is a longitudinal sectional view of the dispenser body;
- Fig. 5 is a longitudinal sectional view of the cylinder of the dispenser shown in Fig.1;
- Figs. 6 and 7 are side view and back view, showing the trigger of the dispenser illustrated in Fig. 1;
- Figs. 8, 9 and 10 are side view, plan view, and front view, showing the nozzle of the piston used in the trigger type dispenser shown in Fig. 1;
- Fig. 11 is a sectional view of the piston, taken along line XI-XI in Fig. 8;
- Fig. 12 is a cross-sectional view of the dispenser body, taken along line XII-XII in Fig. 1;
- Fig. 13 is a longitudinal sectional view showing the mechanism used in the dispenser of Fig. 1; for switching the liquid-flow pattern to another, said mechanism being set in its off-position;
- Figs. 14 and 15 are back view and front view showing the spinner incorporated in the trigger type dispenser illustrated in fig. 1;
- Fig. 16 is a perspective view of the spinner;
- Fig. 17 is an exploded view of the inner element assembly of the dispenser shown in Fig. 1;
- Fig. 18 is an exploded view of the trigger type dispenser;
- Fig. 19 is a plan view schematically showing a stationary mold used for molding dispenser bodies;
- Fig. 20 is a longitudinal sectional view showing the mechanism of Fig. 13, which is located at a liquid-spraying position;
- Fig. 21 is a longitudinal sectional view showing the mechanism of Fig. 13, which is located at a liquid-jetting position;
- Fig. 22 is a perspective view of a modified nozzle which can be used in the dispenser shown in Fig. 1;
- Fig. 23 is a perspective view of a modified nozzle cap which can be used in the dispenser illustrated in Fig. 1;
- Fig. 24 is a longitudinal sectional view showing a nozzle cap designed for foaming a liquid;
- Fig. 25 is a cross-sectional view of the nozzle cap, taken along line A-A in Fig. 24;
- Fig. 1 shows a manually operated
trigger type dispenser 10 according to this invention. As is shown in this figure, thedispenser 10 comprises adispenser body 12 made of synthetic resin, such as polyethylene, by means of injection molding. Thedispenser body 12 includes anupper body portion 14 and alower body portion 16. Thelower body portion 16 extends from theupper body portion 14 in a substantially vertical direction. The lower end of thisbody portion 16 is adapted to be detachably connected to theneck 19 of acontainer 18 containing the liquid to be dispensed, by means of abottle cap 20. - The
dispenser 10 further comprises acylinder 22, apiston 24, and atrigger 26. Like thedispenser body 10, the cylinder, the piston, and the trigger are made of synthetic resin by means of injection molding. - As can be evident from Fig. 2, the
upper body portion 14 comprises atop portion 14a and a pair ofside walls 14b. Theside walls 14b are integrally molded with thetop portion 14a and extend downward from the lateral edges oftop portion 14a. As will be described later, thepiston 24 is arranged in the gap between theseside walls 14b, and thetrigger 26 is swingably pivoted to thepiston 24, not to thedispenser body 12. As is shown in Fig 2, thelower body portion 16 has aslit 28 in the front. The lower end of thebody portion 16 is therefore resiliently bendable. An engagement means 32, which is adapted to fit the lower end of thebody portion 16 into the proximal end 30 of a bottomed bottle cap, is formed on thelower body portion 16, as is illustrated in Fig. 3. - As is shown in Fig. 2 through Fig.4, the engagement means 32 is formed of a
first engagement member 34 and asecond engagement member 36. Thefirst engagement member 34 is a rib formed on the rear side of thelower body portion 16 and extends parallel to the axis of thelower body portion 16. Thesecond engagement member 36 is a flange protruding from the lower end of thebody portion 16; it is positioned below thefirst engagement member 34 such that the proximal end 30 of thebottle cap 20 is clamped between theengagement members second engagement member 36 has alower surface 38 which is inclined, and anupper surface 39 which is horizontal and parallel to the lower surface of the proximal end 30 of the bottle cap. That portion of thesecond engagement member 36 which is right below thefirst engagement members 34 has a large notch, whereby the engagement means 32 can easily be molded. Needless to say, theengagement members - The
bottle cap 20 has an internally threaded portion. Theneck 19 of thecontainer 18 has an externally threaded portion. The threaded portion of thebottle cap 20 can be put in screw engagement with the threaded portion of theneck 19 so that thebottle cap 20 may be detachably connected to theneck 19 of thecontainer 18. As is shown in Fig. 1, a sealingcollar 42 is provided within thebottle cap 20. An annular groove is cut in the top of the sealingcollar 42, thus defining an inner ring 42a and an outer ring 42b which are concentric. Once thelower body portion 16 has been attached to theneck 19 of thecontainer 18 by means of thebottle cap 20, the lower end of thelower body portion 16 is fitted in the annular groove of the sealingcollar 42, that is, in the gap between the rings 42a and 42b of thecollar 42. The upper end of the sealingcollar 42 is clamped between the lower end of thelower body portion 16 and the upper end of theneck 19, whereby thelower body portion 16 is coupled to thecontainer 18 in watertight fashion. Adepression 43 is cut in the inner periphery of the lower end of thelower body portion 16, and a projection 44 is fitted in thedepression 43, the sealingcollar 42 remains coupled to thelower body portion 16 even before thebottle cap 20 is put into screw engagement with theneck 19 of thecontainer 18. Thedepression 43 can be cut in the outer periphery of the inner ring 42a, in which case the projection 44 must be formed on the inner periphery of the lower end of thelower body portion 16. - It will now be explained how the
bottle cap 20 and the sealingcollar 42 are incorporated into thelower body portion 16 of thedispenser body 12. - First, the
bottle cap 20 is pressed onto thelower body portion 16. Then, the proximal end 30 of thebottle cap 20 is guided by thelower surface 38 of thesecond engagement member 36, while slightly collapsing the lower end of thelower body portion 16, and slips into the gap between thefirst engagement member 34 and thesecond engagement member 36. As soon as the proximal end 30 slips into the gap between themembers lower body portion 16 restores its original shape. Thefirst engagement member 34 prevents the proximal end 30 from moving further upward. Theupper surface 39 of thesecond engagement member 36 prevents the proximal end 30 from moving downward. Since theupper surface 39 is parallel to the lower surface of the proximal end 30, thebottle cap 20 is reliably prevented from falling from thelower body portion 16. Theupper surface 39 of thesecond engagement member 36, therefore, functions as a stopper. Thus, thebottle cap 20 is attached to thelower body portion 16. - Thereafter, the sealing
collar 42 is pushed within thebottle cap 20, and forced into thelower body portion 16 of thedispenser body 12. The projection 44 of the sealingcollar 42 slips into thedepression 43 of thelower body portion 16. Thus, the sealingcollar 42 is attached to thelower body portion 16 of thedispenser body 12. - Both the
bottle cap 20 and the sealingcollar 42 are connected to thedispenser body 12 before thebottle cap 20 is put into screw engagement with theneck 19 of thecontainer 18. As will be later described, thebottle cap 20 and the sealingcollar 42 are attached to thedispenser body 12, together with thepiston 24, thetrigger 26, and thecylinder 22. - As is shown in Fig. 1, and as is shown in Fig. 5 in greater detail, the
cylinder 22 comprises a large-diameter section defining apump chamber 56, and a small-diameter portion 58 molded integrally with the large-diameter section and extending downwardly therefrom. An inlet conduit 60 is formed in the small-diameter section 5B. Avalve seat 62 is formed in the small-diameter section 48, and aprimary valve 64, which is a steel ball, is placed on thevalve seal 62. Asuction tube 66 has its upper end fitted in the small-diameter section 58 of thecylinder 22, and extends vertically withincontainer 18. Thesuction tube 66 can be formed integrally withcylinder 22. As is illustrated in Fig. 5, avalve holder 67 is provided within the small-diameter section 58, and prevents theprimary valve 64 from moving into thepump chamber 56. - As can be understood from Figs. 1, 6 and 7, a pair of
engagement members 68 protrude from the back of thetrigger 26, so as to abut on the steppedportion 70 of thecylinder 22. Therefore, when thetrigger 26 is squeezed and swung in the direction of the arrow, as is shown in Fig. 1, thecylinder 22 is moved upward from its non-operation position (i.e., its initial position), along thepiston 24. When thetrigger 26 is released, it returns to its initial position due to the force of a return spring (later described). The sealingcollar 42 has a slender cylindrical portion 71 loosely fitted in the small-diameter section 58 of thecylinder 22. Thecylinder 22 is guided by this cylindrical portion 71, and reciprocated. As is shown in Fig. 7, a pair ofpins 69 project from the opposing inner surfaces of thetrigger 26. Thesepins 69 are loosely fitted inholes 100 cut in a pair of brackets 89 which will later described, whereby thetrigger 26 is swingable with respect to thepiston 24. - As is illustrated in Fig. 1, the
cylinder 22 has an open upper end. The body of thepiston 24, i.e.,piston body 72, has its lower end inserted in thecylinder 22. A flaredseal 74 is integrally molded with the lower end of thepiston body 72. The flaredseal 74 is in sliding contact with the inner periphery of thecylinder 22, and thus guides thecylinder 22 upward and downward. Thereturn spring 76, for example, a compression coil spring, is inserted in thecylinder 22, with its upper end abutting on the stepped portion 77 of thepiston body 72. - An
annular engagement member 78, which has a hook-shaped cross section, is integrally formed with the upper end of thecylinder 22, and slightly extends outwardly. As will be described later, theannular engagement member 78 engages with a hook-shaped support member integrally formed with thepiston 24. Therefore, thecylinder 22 is supported by thepiston 24 and located in its initial position. - As is shown in Fig. 1, and as is more specifically shown in Figs. 8 and 11, the
piston 24 is substantially L-shaped and composed of thepiston body 72 extending vertically, and anozzle 79 extending horizontally. Thepiston body 72 guides thecylinder 22 as thecylinder 22 moves up and down. Anozzle cap 110 is attached to the distal end of thenozzle 79. Anoutlet conduit 80 is formed in thenozzle 79 and communicates with the orifice of thenozzle cap 110. A connection conduit 82 is formed in thepiston body 72, and connects theoutlet conduit 80 to thepump chamber 56. - As is evident from Fig. 1, the
piston body 72 and thenozzle 79 have been separately molded. Thepiston body 72 is fitted in connection cylinder 84 integrally molded with the rear end of thenozzle 79, thereby forming thepiston 24. A valve seat 86 is integrally molded with the upper end of thepiston body 72. Asecondary valve 88, which is a steel ball, is mounted on the valve seat 86, that is, on the upper end of thepiston body 72, thus blocking the communication between theoutlet conduit 80 and the connection conduit 82. Thepiston body 72 and thenozzle 79 can be integrally molded, and thesecondary valve 88 can be incorporated in thenozzle 79. -
Engagement cylinder 90 extends upward from the upper edge of thenozzle 79. Thiscylinder 90 is coaxial with the connecting cylinder 84. Asupport cylinder 92 extends downward from the rear end of thenozzle 79, coaxially with thepiston body 72. As is clearly shown in Fig. 9, the left half (i.e., the front section) of thesupport cylinder 92 is cut away. As is shown in Figs. 1 and 10, a hook-shapedengagement member 94 is formed integrally with the lower end of thesupport cylinder 92. Thismember 94 is arcuate, and its hook portion protrudes from the inner periphery of thecylinder 92 and consists of two portions spaced apart from each other. Since the hook portion of theengagement member 94 is composed of two portions, thenozzle 79 can be easily molded, merely by inserting cores through aholes 96 made in the upper end of thesupport cylinder 92. For the same reason, the hook portion of theengagement member 94 is rendered elastic enough to engage with theannular engagement member 78 of thecylinder 22. - As is shown in Figs. 8 and 9, a pair of
plates 98 are integrally formed with ahinge 99 which is the middle portion ofnozzle 79. A pair ofhooks 97, which can engage with the proximal end 30 of thebottle cap 20, are formed integrally with the lower ends of the hingedplates 98. Ahole 100 is made in each lower end portion of theplate 98. Around the axis of thishole 100, thetrigger 26 is swung. Two guide recesses 101 are cut in those portions of theplates 98 which are located below thehole 100. - The
trigger 26 is pushed up into the lower end of thenozzle 79, with thepins 69 axially aligned with theholes 100 of theplates 98. Thepins 69 are guided upward by the guide recesses 101, and eventually fitted into theholes 100. As a result, thetrigger 26 is pivotally attached to thenozzle 79. Once thepins 69 have been fitted into theholes 100, thetrigger 26 cannot be detached easily from thenozzle 79. As can be understood from Fig. 7, the rear ends of the two parallel walls forming thetrigger 26 are connected such that thetrigger 26 is prevented from falling off thenozzle 79 - In this embodiment, the
pins 69 protrude from the inner surfaces of the parallel walls of thetrigger 26, and theholes 100 are made in theplates 98 of thenozzle 79. Alternatively, thepins 69 can be formed on the inner surfaces of theplates 98, and theholes 100 can be cut in the parallel walls of thetrigger 26. - Both
plates 98 can be rotated, with thehinge 99 acting as a fulcrum. More specifically, thepiston 24 molded, with theplates 98 extending horizontally as is indicated by the one-dot chain lines in Fig. 11. Theseplates 98 are rotated downwardly until they are positioned vertically and parallel to each other. Theplates 98 must be spaced apart for such a distance that thepins 69 of thetrigger 26 are reliably fitted into theholes 100. To set theplates 98 apart for this distance, anengagement cylinder 102 protrudes from the inner surface of one of theplates 98, and anengagement projection 103 protrudes from the inner surface of theother plate 98 and is fitted in theengagement cylinder 102. Therefore, thetrigger 26 is pivotally attached to thepiston 24 reliably. Aprojection 104 protrudes inwardly from the lower end of theright plate 98 as is shown in Fig. 11. Due to thisprojection 104, neitherplate 98 is bent inwardly when thepins 69 of thetrigger 26 are fitted into theholes 100 of theplates 98. Hence, thepins 69 are prevented from slipping out of theholes 100, ensuring the pivotal attaching of thetrigger 26 to thepiston 24. - As has been described, the
nozzle 79 of thepiston 24 is molded, with bothplates 98 extending horizontally. Therefore, it suffices to cut two shallow cavities in the mold for forming thenozzle 79, both being located near the parting line of the mold. Were thenozzle 79 molded, with theplates 79 extending vertically, two deep cavities for forming theplates 98 should be made in the mold, and the mold should be very complex in structure. In the present embodiment, since the cavities for forming theplates 98 are shallow, the mold for forming thenozzle 79 is simple in structure and, hence, can be manufactured at low cost. Since the mold is simply structured, thenozzle 79 can be molded easily. - The pair of
plates 98 can be spaced apart from each other for the specific distance, in any other way than has been described above. - As is illustrated in Figs. 8 and 9, a pair of
engagement projections 105 extend horizontally from the upper edge of thenozzle 79. As is shown in Figs. 4 and 12, a pair of engagement recesses 14c are made in the inner surfaces of the front-end portions of the opposing side walls forming thedispenser body 12. Theengagement projections 105 can be fitted into these engagement recesses 14c. Further, as is shown in Fig. 1, anengagement cylinder 106 protrudes downwardly from theupper edge 14a of thedispenser body 12. Thiscylinder 106 can be fitted into theengagement cylinder 90 of thenozzle 79. When thenozzle 79 is pushed up into thedispenser body 12, withengagement cylinder 106 axially aligned with theengagement cylinder 90 of thebody 12, thecylinder 106 is fitted into thecylinder 90, and theengagement projections 105 are fitted into the engagement recesses 14c, respectively. Thus, thenozzle 79 is attached to thedispenser body 12, being supported at two points, i.e., its front-end portion and its rear-end portion, as is illustrated in Fig. 1. No play is allowed between thedispenser body 12 and thenozzle 79. - As is shown Figs. 1 and 13, the
distal end portion 108 of thenozzle 79 is externally threaded. Anozzle cap 110, which is a bottomed hollow cylinder, is mounted on the externallythread portion 108, in screw engagement therewith. Aspinner 112 for swirling the pressurized liquid flowing through theoutlet conduit 90 is provided within thenozzle 79, being interposed between thenozzle cap 110 and the distal end of thenozzle 79, As is shown in Fig. 13, anorifice 113 is cut in the center of the bottom of thenozzle cap 110. Thenozzle cap 110 can be rotated in either direction. When thecap 110 is rotated in one direction, it moves forward with respect to thenozzle 79. When thecap 110 is rotated in the opposite direction, it moves backward with respect to thenozzle 79. Hence, the gap between the bottom of thenozzle cap 110 and the distal end of thespinner 112 can be adjusted by rotating thenozzle cap 110, whereby the pressurized liquid can be ejected from theorifice 113, in the form of either a spray stream or a jet stream. - As is evident from Fig. 13, the
spinner 112, which is interposed between thenozzle 79 and thenozzle cap 110, is made of a synthetic resin. As Figs. 13 and 14 clearly show, a pair of liquid passages 114 (blind holes) are cut in the rear surface of the bottom of thespinner 112. Thesepassages 114 extend parallel to the axis of thespinner 112 and set apart by 180° in the circumferential direction of thespinner 112. Theliquid passages 114 have a circular section. Nonetheless, one or, three or more liquid passages having any other cross section can be cut in thespinner 112, and can be differently spaced apart in the circumferential direction of thespinner 112. As is shown in Figs. 15 and 16, acircular recess 118 is made in the center of the distal surface of thespinner 112. Thisrecess 118 communicates with, and is coaxial with, theorifice 113. Thecircular recess 118 communicates with theliquid passages 114, at its circumference. A flaredseal 120 extends from the distal end of thespinner 112 and slidably contacts the inner periphery of thenozzle cap 110, whereby thecap 110 and thespinner 112 are coupled in liquid-tight fashion. Acircular recess 121 is out in the rear surface of the bottom of thespinner 112, for compensating for the shrinkage of the synthetic resin which occurs as the moldedspinner 112 is cooled, thereby to prevent thespinner 112 from being deformed during the injection molding. - The liquid passage 114 (i.e., the blind holes) and both
circular recesses spinner 112 -- extend along the axis of thespinner 112. In other words, thespinner 112 has no holes or recesses which extend in the radial direction. Its structure is simple. The mold for forming thespinner 112 is, therefore, equally simple and can be manufactured at low cost. Hence, thespinner 112 can be molded at high speed, and thus in great quantities at low cost. - As can be understood from Fig. 13, the
nozzle cap 110 is composed of three coaxially cylinders, i.e., aninner cylinder 122, anintermediate cylinder 124 surrounding theinner cylinder 122, and an outer cylinder surrounding theintermediate cylinder 124. Theinner cylinder 122 defines theorifice 113. Theintermediate cylinder 124 extends rearwardly from the inner surface of the distal end of thenozzle cap 110. It is the inner periphery of theintermediate cylinder 124 that the flaredseal 120 of thespinner 112 slidably contacts. - In order to prevent liquid-locking from occurring within the
container 18, a venting means must be provided. Therefore, as is shown in Fig. 1, the stepped portion 130 of the sealingcollar 42, and the steppedportion 132 of the small-diameter section 58 of thecylinder 22 are chamfered such that thesechamfered portions 130 and 132 constitute a venting means. The venting means secure airtight connection between thecylinder 22 and thecontainer 18, in spite of its simple structure. Whentrigger 26 is squeezed, and thecylinder 22 is moved upward from its initial position, the steppedportion 132 moves away from the stepped portion 130 of the sealingcollar 42. As a result, a gap is formed between the small-diameter section 58 and the cylindrical portion 71 of the sealingcollar 42. Then, the interior of thecontainer 18 communicates with the atmosphere via this gap, whereby air flows into thecontainer 18 through the gap, thereby preventing liquid-locking within thecontainer 18. -
Trigger type dispenser 10, which has been described above, can be assembled easily, in a few steps, as will be explained below. - First, the inner elements, which will be incorporated into
dispenser body 12, i.e., thepiston 24, thetrigger 26, thecylinder 22, and the like, are combined into one unit. More precisely. as is shown in Fig. 17, thecylinder 22, theprimary valve 64, thereturn spring 76, thepiston body 72, thesecondary valve 88, are sequentially aligned along the vertical axis 134 of thepiston 24. Thecylinder 22, now containing theelements piston 24, whereby theprimary valve 64, thereturn spring 76, thepiston body 72, and thesecondary valve 88 are simultaneously incorporated into thepiston 24. That is, thesecondary valve 88 is mounted on the upper end of thecylinder body 72; theprimary valve 64, thereturn spring 76, and thepiston body 72 are then contained in thecylinder 22; finally, thecylinder 22 is pushed onto thenozzle 79. As thecylinder 22 is gradually inserted into thepiston 24, the hook-shapedengagement member 94 pushed by theannular engagement member 78 of thecylinder 22 and is thus bent outward in the radial direction of thesupport cylinder 92. As soon as theannular engagement member 78 moves above the hook-shapedengagement member 94, themember 94 bends by itself to return to its initial position, due to its elasticity, and thus engages with themember 78 of thecylinder 22. As has been described, almost front half of thesupport cylinder 92 has been cut away, the hook-shapedengagement member 94 is sufficiently elastic, so that theannular engagement member 78 can easily engages with themember 94 even when thecylinder 22 is pushed up with a small force. Once theengagement members cylinder 22 is supported by thepiston 24, and remains at its initial position against the force of thereturn spring 76. Theengagement members members 78 and 95 firmly engage with each other, thus supporting thecylinder 22 in the initial position. - The
pins 69 of thetrigger 26 are aligned axially with theholes 100 ofplates 98, and then thetrigger 26 is pushed into thepiston 24 until thepins 69 are fitted into theholes 100. After thepins 69 have been fitted into theholes 100, thetrigger 26 is swingably supported by thepiston 24. - Thereafter, as is shown in Fig. 17, the
spinner 112 andnozzle cap 110 are aligned along thehorizontal axis 136 of thepiston 24. Thenozzle cap 110 is mounted on thenozzle 79 and rotated, so as to come into screw engagement with the externally threadedportion 108 of thenozzle 79. As a result, thenozzle cap 110 is mounted on the distal end of thenozzle 79, and thespinner 112 is incorporated into thenozzle 79. - The
cylinder 22, theelements trigger 26, thenozzle cap 110, thespinner 112 need not be attached to, and incorporated into, thepiston 24 in the specific order described above. Needless to say, they can be attached to, or inserted into, thepiston 24 in a different order. - For simplicity of explanation, the unit comprised of the
piston 24, thecylinder 22, theelements trigger 26, thenozzle cap 110, and thespinner 112 will be hereinafter called "inner-element assembly 138." - After the inner-
element assembly 138 has been formed, as has been explained above, theassembly 138, thebottle cap 20, and the sealingcollar 42 are aligned coaxially with thelower portion 16 of thedispenser body 12, as is illustrated in Fig. 18. Then, the sealingcollar 42, which is located lower-most, is pushed upward until the engagement means 32 of thelower body portion 16 engages with the upper end of the sealingcollar 42, thereby attaching thebottle cap 20 to thelower body portion 16 and, simultaneously, incorporating the inner-element assembly 138 into thelower body portion 16. At the same time, the projection 44 of the sealingcollar 42 is forced into thedepression 43 of the lower end of thebody portion 16, and the sealingcollar 42 is, therefore, connected to thelower body portion 16. As a result, thedispenser 10 is assembled. Of course, instead of pushing the sealingcollar 42 upward to thelower body portion 16, thelower body portion 16 can be pushed downward onto the upper end of thebottle cap 20 and the sealingcollar 42, with the inner-element assembly 138 partly incorporated in thelower body portion 16. - According to the present invention, as has been described, the
cylinder 22 and thepiston 24 are not molded integrally with thedispenser body 12, and the inlet conduit 60 and theoutlet conduit 80 are formed in thecylinder 22 and thepiston 24, respectively. In other words, thedispenser body 12 has neither the inlet conduit 60 nor theoutlet conduit 80; it has thelower body portion 16 which extends vertically downward. Hence, thedispenser body 12 is simple in structure, and the cavity of the mold for forming thedispenser body 12 is equally simple in shape. The cycle of the injection molding of thebody 12 can therefore be short. - Further, as has been described, the
outlet conduit 80, which extends at right angles to the axis of thelower body portion 16, is not formed in thedispenser body 12. For this reason, thedispenser body 12 can be injection-molded, only by moving the movable half of the mold, without the necessity of using cores designed for forming theoutlet conduit 80. Three or more rows of cavities can, therefore, be cut in the stationary half of the mold, in contrast to thestationary mold 204 for forming the body of the known trigger type dispenser, which has only two rows ofcavities 202, spaced apart in the direction of arrow Y, as is illustrated in Fig. 19. Hence, according to the present invention,more dispenser bodies 12 can be molded in each injection cycle. In Fig. 19, the rectangles drawn in one-dot chain lines representadditional cavities 202 formed in thestationary mold 204 for forming thedispenser bodies 12. - Since the
dispenser body 12 is simple in structure, it can be molded within a short injection cycle, and many dispenser bodies can be molded in each injection cycle. Hence, thedispenser body 12 can be manufactured in great quantities. Moreover, the cavities of the mold for forming thedispenser body 12 have a simple shape, the mold can be made at low cost. - As has been described above, the
piston 24 can be molded, with theplates 98 extending horizontally as is indicated by the one-dot chain lines in Fig. 11. Therefore, it suffices to cut two shallow cavities in the mold for forming thenozzle 79, both being located near the parting line of the mold. Thepiston 24 can be easily molded and, thus, in great quantities. Since the mold for forming thepiston 24 has a simple structure, it can be manufactured at low cost. - In the embodiment described above, the
piston 24 is incorporated in thedispenser body 12, whereas thecylinder 22 is moved upward when thetrigger 26 is squeezed, and is moved downward when thetrigger 26 is released. As an alternative, thecylinder 22 can be fixed within thedispenser body 12, and thepiston 24 can be moved up and down when thetrigger 26 is squeezed and released. This is because thecylinder 22 having the inlet conduit 60, and thepiston 24 having theoutlet conduit 80 are molded separatedly from thedispenser body 12, thereby making it possible to mold thebody 12 in great quantities. - As has been described above, the
piston 24, thecylinder 22, and thetrigger 26 are aligned coaxially, and thecylinder 22 and thetrigger 26 are attached to thepiston 24, thereby easily forming the inner-element assembly 138. The inner-element assembly 138 cannot be disintegrated easily. Thedispenser 10 can be completed, by merely pushing thebottle cap 20, the sealingcollar 42, and theassembly 138 onto thedispenser body 12, while keeping them in axial alignment with thedispenser body 12. - As has also been explained already, the
dispenser body 12 can be molded in large quantities, regardless of whether thecylinder 22 or thepiston 24 is movable. However, since the movable element must be held in the initial position while thedispenser 10 is being assembled, it is desirable that thecylinder 22 be movable as in the above embodiment. - The inner-
element assembly 138 can be assembled easily and quickly, only if thecylinder 22, thepiston 24, and thetrigger 26 have been aligned coaxially with one another. Once theassembly 138 has been thus formed, thedispenser 10 can be assembled, merely by aligning thedispenser body 12, theassembly 138, thebottle cap 20, and the sealingcollar 42 coaxially with one another, and then couple them together. Obviously, thedispenser 10 can be assembled easily and quickly. - Once the inner-
element assembly 138 has been assembled, thecylinder 22 remains firmly attached to thepiston 24 since theannular engagement member 78 of thecylinder 22 engages with the hook-shapedengagement member 94 of thepiston 24. Thus, theassembly 138 can hardly be disintegrated while it is being stored or transported. - As can be understood from Fig. 1, the
bottle cap 20 and the sealingcollar 42 have relatively simple structures. They can be easily be made by injection molding, like thedispenser body 12. Besides, as has been explained, thedispenser body 12, thebottle cap 20, the sealingcollar 42, and the inner-element assembly 138 can be coupled together, thus assembling thedispenser 10, by either pushing down thebody 12 or pulling up the sealingcollar 42. In short, it is not technically difficult to injection-molding the components of thedispenser 10, or to connecting these components, thereby to manufacture thedispenser 10. In view of this fact, thetrigger type dispenser 10 according to the present invention can be manufactured easily in the industrially developing countries, as well as the industrially advanced countries. - Since the inner-
element assembly 138 remains integrated while being transported, it can be supplied from the main factory, where it has been made, to other remote factories. Hence, thedispenser 10 can be manufactured in these remote factories in a knock-down scheme, that is, by coupling theassembly 138 and the other unfinished products, i.e., thebottle cap 20 and the sealingcollar 42, with thedispenser body 12. As is generally known, such knock-down manufacture of products does not require skilled labor. In view of this, thetrigger type dispenser 10 according to this invention can be manufactured in the knock-down scheme, even in those regions where skilled labor is hard to obtain. - The inner-
element assembly 138 can be modified, thereby to provide various types of dispensers. For example, a tip having a foamed rubber screen, a meshed screen, or the like can be attached to thenozzle cap 110, in which case a foaming-type dispenser can be provided. Thus, if various modifications of theassembly 138 are manufactured in the main factory and are supplied to the other factories existing all over the world, where they are needed, the manufacture program and design alteration of the dispenser can be controlled on a gloval basis. - The
dispenser 10 according to the present invention is completed when thesuction tube 66 is fitted in the small-diameter section 58 of thecylinder 22. Needless to say, thesuction tube 66 can be made easily, and can be fitted easily into the small-diameter section 58. - The
nozzle cap 110 and thespinner 112 are combined, constituting amechanism 140 for switching the pattern in which the pressurized liquid flows from theorifice 113. When thenozzle cap 110 is rotated and moved rearward, or to the right (Fig. 13), theinner cylinder 122 enters thecircular recess 118 of thespinner 112, and the free end of thiscylinder 122 contacts thebottom 119 of therecess 118, as is illustrated in Fig. 13. As a result, theliquid passages 114 are close, whereby theorifice 113 is disconnected from theoutlet conduit 80 of thenozzle 79. The pressurized liquid is therefore completely prevented from flowing from thepassages 114 into theorifice 113 via thecircular recess 118. Hence, in this condition, the liquid never leaks even if thetrigger 26 is squeezed by error. The residual liquid, if any in thepassages 114, dose not leak, either. Thus, only if thenozzle cap 110 is rotated until itsinner cylinder 122 abuts on the bottom of thecircular recess 119, thecap 110 can be set in its off-position, so as to prevent the pressurized liquid from leaking. Namely, thenozzle cap 110 can be set easily in the off-position. - Despite its simple structure, the
nozzle cap 110 can cooperate with thespinner 112 to prevent the pressurized liquid from leading via theorifice 113 even if thetrigger 26 is squeezed by mistake. Therefore, unlike the conventional trigger type dispenser, thedispenser 10 according to this invention need not be provided with a trigger-locking mechanism or a plug means for closing theorifice 113. Thedispenser 10 according to the present invention is, thus, less complex in structure than the conventional one, and is superior to the conventional dispenser in terms of outer appearance. - In the embodiment, the
nozzle cap 110 is in screw engagement with the externally threadedportion 108 of thenozzle 79, and moves back and forth when rotated. Instead, thenozzle cap 110 can be in sliding contact with thenozzle 79. - It should be noted that the
trigger type dispenser 10 is transported for sale, with thenozzle cap 110 is held in the off-position, if thedispenser 10 is connected to thecontainer 18 filled with a liquid. - To use the
dispenser 10, thenozzle cap 110 is rotated, thereby moving it from its off-position to the left (Fig. 1). Then, as is shown in Fig. 20, theinner cylinder 122 of thecap 110 is slightly moved away from thebottom 119 of thecircular recess 118 of thespinner 112. As a result, theoutlet conduit 80 of thenozzle 79 is connected to theorifice 113 via the gap between the bottom 119 and thecylinder 122. In this condition, theliquid passages 114 communicate with thecircular recess 118 as is illustrated in Fig. 15. Therefore, the pressurized liquid flows from theoutlet conduit 80 of thenozzle 79 into therecess 118 through theliquid passages 114, swirling within therecess 118 and flowing into theorifice 113. Hence, the liquid is ejected outside via theorifice 113. - A part of the liquid flowing from the
passages 114 into thecircular recess 118 intends to flow along the outer periphery of theinner cylinder 122 and then through the gap between the inner surface of the distal end of thecap 110 and the distal end of thespinner 112. However, the flaredseal 120 blocks the flow of the liquid. - As is shown in Fig. 20, the
circular recess 118 and theinner cylinder 122 are circular and concentric. The shapes of therecess 118 and thecylinder 122, and the positional relationship between them, are not limited to these, however, provided therecess 118 and thecylinder 122 cause the pressurized liquid to swirl into theorifice 113. - When the
nozzle cap 110 assumes the position shown in Fig. 20 (hereinafter referred to as "liquid-spraying position"), the liquid is sprayed from thenozzle 79 each time thetrigger 26 is squeezed. To eject the liquid from thenozzle 79 in the form of a jet stream, thenozzle cap 110 is rotated, thus moving thebottom 109 of thecap 110 farther from the distal end of thespinner 112, as is illustrated in Fig. 21. In other words, thenozzle cap 110 is further moved to the left to the position shown in Fig. 21 (hereinafter referred to as "liquid-jetting position"). As long as thecap 110 stays at the liquid-jetting position, a relatively wide gap is provided between theinner cylinder 122 and thebottom 119 of thecircular recess 118. Since this gap is too wide, the pressurizes liquid flowing from thepassages 114 into therecess 118 can no longer swirl, and is ejected outside through theorifice 113 in the form of a jet stream, as is shown in Fig. 21. - As has been explained in the preceding paragraph, the
nozzle cap 110 can be easily moved between the liquid-spraying position and the liquid-jetting position, when it is rotated in one direction and in the opposite direction. When thenozzle cap 110 is thus moved to either position, the flowing-pattern of the liquid is quickly and easily switched. Since theorifice 113 is cut in the center of the bottom 119 of thenozzle cap 110, the liquid is ejected from the same position whenever thetrigger 26 is squeezed, provided that thenozzle cap 110 is located in either the liquid-spraying position or the liquid-jetting position. - Assuming that the
nozzle cap 110 is in the liquid-jetting position, thecap 110 can be moved to the right, thus first assuming the liquid-spraying position (Fig. 20), and then the off-position (Fig. 13). - After the liquid has been sprayed or jetted, the
nozzle cap 110 is rotated until theinner cylinder 122 abuts on thebottom 119 of thecircular recess 118. Then, thecap 110 can no longer be moved father to the right. It is at this moment that thenozzle cap 110 reaches the off-position. The user can easily know that thecap 110 has been set in the off-position. - As has been explained, the flowing-
pattern switching mechanism 140 can not only change the flowing-pattern of the liquid quickly, but also reliably set thenozzle cap 110 in the off-position. - It is desirable that marks be imprinted on the
upper body portion 14 and thenozzle cap 110, thereby to render it easy for the user to recognize whether thecap 110 is set in the liquid-spraying position or the liquid-jetting position. More specifically, a mark "◁" should be imprinted on theupper body portion 14, and words "SPRAY" and "JET" should be imprinted on thecap 110, spaced apart from each other in the circumferential direction of thecap 110. If this measure has been taken, thecap 110 can be set in the liquid-spraying position when it is rotated until the word "SPRAY" is aligned with the mark "◁", and in the liquid-jetting position when it is rotated until the word "JET" is aligned with the mark "◁". Hence, thenozzle cap 110 can be located in either position, fast and accurately. - As has been pointed out, the
nozzle cap 110 can be easily set in the off-position by being moved to the right until theinner cylinder 122 contacts thebottom 119 of thecircular recess 118. However, when the user rotates thecap 110 with an excessively great force, thus moving thecap 110 to the right, thecylinder 112 and/or therecess 118 may be damaged. To prevent such a damage, it is desirable that the word "OFF" be imprinted on thenozzle cap 110, and that the user stop rotating thecap 110 when the word "OFF" is aligned with the mark "◁" imprinted on theupper body portion 14. - In order to prevent an excessive movement of the
cap 110 to the right, a stopper mechanism for inhibiting thecap 110 from further rotating after it has assumed the off-position, as is shown in Fig. 22 and Fig. 23. As is indicated in Fig. 22, athin disc 114 having astopper 143 is mounted on thenozzle 79 right behind the externally threadedportion 108. Assuming that theportion 108 is a right-handed screw, theupper edge 143a of thestopper 143 is inclined to thedisc 144, and the lower edge thereof extends perpendicular to thedisc 144. As is shown in Fig. 23, thenozzle cap 110 has aflange 146 connected the rear. Thisflange 146 has a slit, and thus has twoends upper end 146a is inclined, whereas thelower end 146b extends in the radial direction of theflange 146. - When the
nozzle cap 110 in the off-position (Fig.1) is rotated clockwise to move further to the right, theinclined edge 143a of thestopper 143 abuts on theinclined end 146a of theflange 146, whereby theflange 146 pushesstopper 143 backwardly. As a result, thethin disk 144, which functions as a leaf spring, is deformed such that thestopper 143 slips out of the slit of theflange 146. Hence, thenozzle cap 110 can be further rotated clockwise. When thecap 110 is thereafter rotated counterclockwise, then thelower edge 143b of thestopper 143 abuts on thelower end 146b of theflange 146. In this case, thethin disc 114 is not deformed, and thestopper 143 remains in abutment with thelower end 146b of theflange 146, and thenozzle cap 110 cannot be further rotated counterclockwise. Thethin disc 144 having thestopper 143, and theflange 146 having a slit are simple in structure, and yet can cooperate to prevent readily an excessive movement of thecap 110 to the right. - In the embodiment described above, the flowing-
pattern switching mechanism 140 is used to change the pattern in which a pressurized liquid is ejected from theorifice 113. Thismechanism 140 can be used not only in a trigger type dispenser, but in other types of dispenser, such as a push-pull type dispenser wherein a push-button is pushed to lower a piston, so as to pressurize a liquid, a dispenser having a container which can be collapsed to pressurize a liquid, or a motor-driven dispenser wherein an electric motor is used to pressurize a liquid. - Fig. 24 shows a modification of the
nozzle cap 110, which is designed to foam a liquid. As is shown in this figure, thisnozzle cap 149 has anextension cylinder 150 projecting forward from the bottom 109. A truncated conical,hollow cylinder 152 is provided within theextension cylinder 150 and molded integrally therewith. Thecylinder 152 allows the passage of the central portion of the liquid stream ejected from theorifice 113, and blocks the other portion of the liquid stream. As is shown in Fig. 25, four air-inlet ports 154 are cut in thebottom 109 of thenozzle cap 149, and spaced apart at regular intervals in the circumferential direction ofintermediate cylinder 124. The shape, number, and position of the air-inlet ports 154 are not limited to those shown in Fig. 25. - The central portion of the liquid stream ejected from the
orifice 113 passes through the opening of thecylinder 152, whereas the other portion of the liquid stream abuts on the inclined inner periphery of thecylinder 152 and change into tiny liquid particles. The air supplied into thecylinder 152 through the air-inlet ports 154 mixes these tiny liquid particles with the centeral portion of the liquid stream, whereby the liquid is foamed. - When the
nozzle cap 149 shown in Fig. 24, which hascylinder 152 and air-inlet ports 154, is employed in place of thenozzle cap 110, thedispenser 10 will function as a liquid-foaming dispenser. Although the air-inlet ports 154 are cut in thebottom 109 of thenozzle cap 149, thenozzle cap 149 and thespinner 112 are coupled in a liquid-tight fashion. This is because the flaredseal 120 of thespinner 112 remains in sliding contact with the inner periphery of theintermediate cylinder 124, as is evident from Fig. 24. - As is shown in Fig. 24, the air-
inlet ports 154 and thecylinder 152 extend along the axis of thenozzle cap 149. Therefore, the mold for forming thenozzle cap 149 is simple in structure. Therefore, thenozzle cap 149 can be molded easily and, hence, at low cost.
Claims (12)
- A method of assembling a manually operated trigger type dispenser wherein inner elements, such as a piston (24), a nozzle cap (110), a trigger (26), a return spring (76), and a primary valve (64), are incorporated in a dispenser body (12), and a bottle cap (20) is attached to a lower end of the dispenser body (12), using the steps of:(a) forming an inner-element assembly (138) comprising a substantially L-shaped piston (24), a nozzle cap (110), a spinner (112), a trigger (26), a cylinder (22), a primary valve (64), and a return spring (76), by:
attaching said nozzle cap (110) to a distal end of a nozzle (79), with said spinner (112) coupled to the distal end of the nozzle (79) and located within said nozzle cap (110), said nozzle (79) extending horizontally from a vertical piston body (72), thus constituting said piston (24), jointly with the piston body (72);
connecting said trigger (26) pivotally to said piston (24); and
incorporating said cylinder (22), said primary valve (64), and said return spring (76) into said piston body (72);(b) arranging a dispenser body (12) on one side of said inner-element assembly (138), and a bottle cap (20) for coupling the dispenser body (12) to a neck (19) of a container (18), on the other side of said inner-element assembly (138); and(c) pushing said bottle cap (20) onto the lower end of said dispenser body (12), thereby coupling said bottle cap (20) with the lower end of said dispenser body (12) and, simultaneously, incorporating said inner-element assembly (138) into said dispenser body (12). - A method according to claim 1, wherein a sealing collar (42) is coupled to the lower end of said dispenser body (12) when said bottle cap (20) is coupled to the lower end of said dispenser body (12).
- A manually operated trigger type dispenser assembled by the method according to claim 1 or 2.
- A manually operated trigger type dispenser in which a dispenser body (12) made of a synthetic resin and including an upper portion (14) and a lower portion (16) vertically extending from the upper portion (14) is coupled to a neck (19) of a container (18) by means of a bottle cap (20), a liquid is sucked up from the container (18) via an inlet conduit (60) into a pump chamber (56) of a cylinder (22) and pressurized in the pump chamber (56) when a trigger (26) is squeezed, and the pressurized liquid is supplied to a nozzle (79) through an outlet conduit (80) and dispensed through an orifice (113) cut in the nozzle (79), wherein said cylinder (22) is engaged with said trigger (26) so as to reciprocate between an upper operation position and a lower non-operation position, while being guided by a piston (24) fixed within said dispenser body (12), when said trigger (26) is squeezed and released; said piston (24) is substantially L-shaped and comprised of a horizontal nozzle (79) fixed within the upper portion (14) of said dispenser body (12) and having a distal end to which a nozzle cap (110) is attached, and a piston body (72) arranged within the lower portion (16) of said dispenser body (12), extending vertically from said nozzle (79), and adapted to guide said cylinder (22); said outlet conduit (80) is provided within said piston (24), and an inlet conduit (60) is provided in said cylinder (22);
said piston (24) engages with said cylinder (22), thereby holding said dylinder (22) in the lower non-operation position, characterized in that
a notch (28) is cut in the front section of the lower portion (16) of said dispenser body (12), allowing the passage of said piston (24) and the rear end of said trigger (26) which is engaged with said cylinder (22);
an engagement means (32) is formed on the lower end of the lower portion (16) of said dispenser body (12), for fitting said dispenser body (12) in said bottle cap (20), by utilizing the elasticity imparted to the dispenser body (12) by said notch (28); and
said piston (24) engages with said cylinder (22), thereby holding said cylinder (22) in the lower non-operation position. - A dispenser according to claim 4, wherein said engagement means (32) includes a first engagement section (34) and a second engagement section (36) located below the first engagement section (34), said first and second engagement sections (34,36) holding the proximal end of said bottle cap (20).
- A dispenser according to claim 5, wherein said first engagement section (34) has a rib formed on the back of said dispenser body (12) and extending parallel to the axis of said lower portion (16) of said dispenser body (12), and said second engagement section (36) has a flange having a lower inclined surface (38) for guiding the proximal end of said bottle cap (20) upwardly and an upper surface (39) extending substantially parallel to the lower surface of the proximal end of said bottle cap (20), for preventing said bottle cap (20) from slipping from said dispenser body (12).
- A dispenser according to claim 6, wherein said flange has a notch at a position where the flange intersects with the axis of said rib.
- A dispenser according to any one of claims 4 to 7, further comprising a sealing collar (42) which is coupled with the lower end of the lower portion (16) of said dispenser body (12) when said bottle cap (20) is connected to the lower portion (16) of said dispenser body (12).
- A dispenser according to any one of claims 4 to 8, wherein said cylinder (22) has a hook-shaped engagement member (78) at the upper end, and said piston (24) has a support cylinder (92) surrounding said piston body (72) and having a hook-shaped engagement member (94) at the lower end, which is engaged with the hook-shaped engagement member (78) of said cylinder (22), whereby holding said cylinder (22) in the lower non-operation position.
- A dispenser according to any one of claims 4 to 8, wherein said piston (24) includes a pair of hinged plates (98) molded integrally with the nozzle (79) and supporting said trigger (26) pivotally, and said cylinder (22) has a hook-shaped engagement member (78) at the upper end, said piston (24) having a support cylinder (92) surrounding said piston body (72) and having a hook-shaped engagement member (94) at the lower end, which is engaged with the hook-shaped engagement member (78) of said cylinder (22), thereby holding said cylinder (22) in the lower non-operation position.
- A dispenser according to claim 9 or 10, wherein the support cylinder (92) of said piston (24) has a notch, and the hook-shaped engagement member (94) of said piston (24) has two portions spaced apart from each other.
- A dispenser according to claim 4, wherein said nozzle cap (110, 149) is a bottomed cylinder molded of a synthetic resin, and includes an inner cylinder (122) defining said orifice (113) and an intermediate cylinder (124) surrounding the inner cylinder (122) and extending backward from the bottom (119) of said nozzle cap (110); and a spinner (112) in the form of a bottomed cylinder is located within said nozzle cap (110, 149), is molded of a synthetic resin, and has liquid passages (114) cut in the bottom (119) of the spinner (112) and communicating with the outlet conduit (80) of said piston (24), and a recess (118) cut in the bottom (119) of the spinner (112), opposing the orifice (113) of said nozzle cap (110), and communicating with the liquid passages (114) at its circumference, the bottom (119) of said recess (118) being capable of contacting the inner cylinder (122) of said nozzle cap (110 149).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62200149A JPH0685897B2 (en) | 1987-08-11 | 1987-08-11 | Manual trigger-type dispenser and method for producing the same |
JP200149/87 | 1987-08-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0302994A2 EP0302994A2 (en) | 1989-02-15 |
EP0302994A3 EP0302994A3 (en) | 1990-03-14 |
EP0302994B1 true EP0302994B1 (en) | 1992-05-13 |
Family
ID=16419604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88104555A Expired - Lifetime EP0302994B1 (en) | 1987-08-11 | 1988-03-22 | A manually operated trigger type dispenser, method of assembling the same, and a spinner for use in the dispenser |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0302994B1 (en) |
JP (1) | JPH0685897B2 (en) |
KR (1) | KR930000399B1 (en) |
CN (1) | CN1010084B (en) |
AU (3) | AU610152B2 (en) |
DE (1) | DE3871023D1 (en) |
ES (1) | ES2031547T3 (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5147075A (en) * | 1988-10-03 | 1992-09-15 | Falcon Safety Products Incorporated | Actuating mechanism for pressurized fluid containers and nozzle assembly |
CA1323007C (en) * | 1988-10-03 | 1993-10-12 | Richard B. Regan | Actuating mechanism for pressurized fluid containers and nozzle assembly |
JPH03212361A (en) * | 1990-01-16 | 1991-09-17 | Atsushi Tada | Cylinder movable trigger type dispenser |
IT220413Z2 (en) * | 1990-11-06 | 1993-09-21 | Coster Tecnologie Speciali Spa | PUMP DEVICE FOR DOSING OR DISPENSING HAND-OPERATED FLUIDS. |
US5549249A (en) * | 1991-12-13 | 1996-08-27 | Contico International, Inc. | Fluid spinner and nozzle head assembly with controlled fluid flood path |
DE4411031A1 (en) * | 1993-07-22 | 1995-01-26 | Meckenstock Fritz Gmbh | Hand operated pump |
DE29508519U1 (en) * | 1995-05-23 | 1996-09-19 | Frimec Fritz Meckenstock GmbH & Co, 42119 Wuppertal | Hand operated pump |
ES2143904B1 (en) * | 1996-12-18 | 2001-01-01 | Calmar Monturas Sa | "DISPENSER" |
ES2163980B1 (en) * | 1999-06-15 | 2003-10-16 | Calmar Monturas Sa | AUXILIARY COMMUNICATION DEVICE BETWEEN A PUMPING MECHANISM AND A CONTAINER AND PROCEDURE FOR MANUFACTURING. |
KR100331768B1 (en) * | 2000-04-17 | 2002-04-09 | 이상영 | Blanking Mold for Working an Ostrich Leather |
KR100331767B1 (en) * | 2000-04-17 | 2002-04-09 | 이상영 | Manufacturing Method of an Ostrich Leather and Manufacturing Device thereof |
CN100375656C (en) * | 2005-01-12 | 2008-03-19 | 黄建壮 | Carrier style hand sprayer |
ITBS20120109A1 (en) * | 2012-07-17 | 2014-01-18 | Guala Dispensing Spa | TRIGGER SUPPLY DEVICE |
CN106102930B (en) * | 2014-02-26 | 2020-02-21 | 分配技术有限公司 | Liquid dispensing apparatus with pre-compressed outlet valve |
KR101661575B1 (en) * | 2014-10-22 | 2016-10-04 | (주)연우 | Spray orifice structure |
JP6543100B2 (en) * | 2015-06-08 | 2019-07-10 | キャニヨン株式会社 | Pump dispenser |
CN107930888B (en) * | 2017-12-18 | 2023-03-31 | 市下控股有限公司 | Two-section straight spray gun with fan-shaped and columnar water outlet |
JP7292142B2 (en) * | 2019-07-31 | 2023-06-16 | 株式会社吉野工業所 | ejector |
CN113042245B (en) * | 2021-03-09 | 2022-05-17 | 宁波圣捷喷雾泵有限公司 | Spray gun |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4013228A (en) * | 1974-11-14 | 1977-03-22 | Chemtrust Industries Corporation | Foam generating sprayer apparatus |
US4371097A (en) * | 1980-05-07 | 1983-02-01 | Diamond International Corporation | Liquid dispensing pump |
US4516695A (en) * | 1981-02-09 | 1985-05-14 | The Afa Corporation | Child-resistant liquid dispenser sprayer or like apparatus |
CA1209542A (en) * | 1982-07-06 | 1986-08-12 | Douglas S. Martin | Trigger sprayer |
WO1985005572A1 (en) * | 1984-06-01 | 1985-12-19 | Bundschuh Robert L | Pump dispenser with slidable trigger |
AU581041B2 (en) * | 1985-12-03 | 1989-02-09 | Atsushi Tada | A manually operated trigger type dispenser |
-
1987
- 1987-08-11 JP JP62200149A patent/JPH0685897B2/en not_active Expired - Lifetime
-
1988
- 1988-03-22 EP EP88104555A patent/EP0302994B1/en not_active Expired - Lifetime
- 1988-03-22 ES ES198888104555T patent/ES2031547T3/en not_active Expired - Lifetime
- 1988-03-22 DE DE8888104555T patent/DE3871023D1/en not_active Expired - Lifetime
- 1988-04-13 KR KR1019880004198A patent/KR930000399B1/en not_active IP Right Cessation
- 1988-04-15 AU AU14691/88A patent/AU610152B2/en not_active Ceased
- 1988-04-23 CN CN88102444A patent/CN1010084B/en not_active Expired
-
1990
- 1990-03-19 AU AU51467/90A patent/AU606009B2/en not_active Ceased
- 1990-11-27 AU AU66979/90A patent/AU618693B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
AU1469188A (en) | 1989-02-16 |
CN1010084B (en) | 1990-10-24 |
KR930000399B1 (en) | 1993-01-18 |
JPS6443365A (en) | 1989-02-15 |
CN1031210A (en) | 1989-02-22 |
DE3871023D1 (en) | 1992-06-17 |
KR890003445A (en) | 1989-04-14 |
AU5146790A (en) | 1990-07-19 |
AU6697990A (en) | 1991-01-31 |
AU606009B2 (en) | 1991-01-24 |
JPH0685897B2 (en) | 1994-11-02 |
EP0302994A3 (en) | 1990-03-14 |
AU618693B2 (en) | 1992-01-02 |
ES2031547T3 (en) | 1992-12-16 |
AU610152B2 (en) | 1991-05-16 |
EP0302994A2 (en) | 1989-02-15 |
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