EP3974065B1 - A fluid substance dispensing device - Google Patents
A fluid substance dispensing device Download PDFInfo
- Publication number
- EP3974065B1 EP3974065B1 EP21198320.0A EP21198320A EP3974065B1 EP 3974065 B1 EP3974065 B1 EP 3974065B1 EP 21198320 A EP21198320 A EP 21198320A EP 3974065 B1 EP3974065 B1 EP 3974065B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- seat
- piston
- stem
- elastic element
- cup
- 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.)
- Active
Links
- 239000012530 fluid Substances 0.000 title claims description 12
- 239000000126 substance Substances 0.000 title claims description 11
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- 244000273618 Sphenoclea zeylanica Species 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 230000005489 elastic deformation Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 2
- 230000004913 activation Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 4
- 230000036316 preload Effects 0.000 description 3
- 230000000284 resting effect Effects 0.000 description 3
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000013536 elastomeric material Substances 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 241000761389 Copa Species 0.000 description 1
- 229920001634 Copolyester Polymers 0.000 description 1
- -1 SEES Polymers 0.000 description 1
- 229920006465 Styrenic thermoplastic elastomer Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
Classifications
-
- 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
- B05B11/0005—Components or details
- B05B11/0027—Means for neutralising the actuation of the sprayer ; Means for preventing access to the sprayer actuation means
- B05B11/0029—Valves not actuated by pressure
-
- 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
- B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
-
- 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
- B05B11/1042—Components or details
- B05B11/1073—Springs
- B05B11/1076—Traction springs, e.g. stretchable sleeve
-
- 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
- B05B11/1042—Components or details
- B05B11/1043—Sealing or attachment arrangements between pump and container
- B05B11/1046—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container
- B05B11/1047—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container the pump being preassembled as an independent unit before being mounted on the container
-
- 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
- B05B11/1042—Components or details
- B05B11/1066—Pump inlet valves
- B05B11/1067—Pump inlet valves actuated by pressure
-
- 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
- B05B11/1042—Components or details
- B05B11/1073—Springs
- B05B11/1074—Springs located outside pump chambers
Definitions
- the present invention relates to a device for dispensing a fluid substance.
- a manually operated device for dispensing a fluid substance such as a cosmetic product, like a soap, a gel, a perfume, a home care product, a product for cleaning, for disinfection, etc.
- Conventional dispensing devices comprise a movable piston for activating a hollow stem inside a compression chamber.
- the movement counters the action of a spring and is generated by pressure applied by a user to a dispenser button.
- the spring counter to which the piston moves is made of metal and - even when the device is in the resting condition - is slightly compressed or preloaded, which can lead to the malfunction thereof.
- the metal spring is one of the most expensive and heaviest components of commonly known dispensing devices.
- WO2011/036217-A1 describe a known pump.
- the object of the present invention is to provide a dispensing device which is improved with respect to the prior art and which overcomes the technical drawbacks thereof.
- a further object of the invention is to provide a device which is more reliable than the commonly known ones, even after long storage periods prior to the sale thereof, and therefore prior to a first activation thereof.
- the device may be equipped with a main spring made of an elastomeric or plastic material.
- Another advantage is that the device is less expensive and more environmentally friendly than those according to the prior art.
- reference number 1 is used to denote, as a whole, a fluid substance dispensing device.
- the device 1 comprises a cup-shaped body 2 within which a piston 3 slides in a sealed manner.
- the piston may feature a single or multiple sealing lips (as shown here).
- the cup-shaped body 2 may be permanently fastened to an interconnection element 30, which may, in turn, be fastened to a tubular element 25.
- the tubular element may be secured (for example, in a sealed manner) to a collar 23 equipped with a flange 23A on top of which a ring nut 24 rests, for example of the threaded variety, for securing the device to a conventional container (not shown) within which the fluid substance 1 is housed.
- the piston 3 is coupled with a hollow stem 4 for the movement of the piston 3 within the cup-shaped body 2.
- the stem movement drives the piston movement, at least when in an operating configuration.
- the piston 3 and the cup-shaped body 2 define, at least partially, a compression chamber 5, which comprises at least one valve element 6 for supplying the fluid substance to the said compression chamber 5.
- the valve element 6 can be fluidically connected to a suction tube 31, housed in the container, in a conventional manner.
- the suction tube 31 may not be present (for example, in the event that the device is coupled with a deformable bag within which the substance is housed).
- valve element is a ball, preferably made of plastic.
- the hollow stem 4 can be moved counter to an elastic element 7.
- the elastic element 7 may be an elastic traction element, preferably an elastomer membrane spring.
- Usable elastomeric materials include, for example: thermoplastic polyurethane (TPU), Styrenic thermoplastic elastomers (TPE-S), SEES, copolyesters (COPA), vulcanised thermoplastic elastomers (TPSiV), and thermosetting materials (silicone rubbers).
- TPU thermoplastic polyurethane
- TPE-S Styrenic thermoplastic elastomers
- SEES SEES
- TPSiV vulcanised thermoplastic elastomers
- thermosetting materials silicone rubbers
- the elastic element 7 is more clearly visible in Figures 4, 5, and 6 , in which it is illustrated in different operating conditions.
- the elastic element 7 may feature a first end 7B fixed to the stem 3.
- an end part of the stem may be coupled to a sleeve 34 which is snap fastened onto the said stem, and the first end 7B may be sandwiched between the sleeve 34 and a flange 35 which extends from the stem.
- the sleeve 34 may act as a (sealed) coupling with a dispenser button 36 of the conventional kind.
- the second end 7A of the elastic element 7 may be sandwiched between the tubular element 25 and the collar 23.
- At least one elastically extendable element 7C may be positioned between the first end 7B and the second end 7A.
- the element 7C may be continuous or may feature lighter or thicker sections or windows 7D in order to calibrate the elastic response thereof.
- the elastic element is made as one piece with a single elastomeric material but there is nothing to prevent it being made of several assembled pieces. And obviously it may also have a different configuration from the one illustrated here.
- the stem 4 has a first seat 8 for coupling with the piston 3.
- the piston may be conventionally movable (i.e. sliding axially along the stem in a limited manner) so as to clear or close up a fluid passageway 20 connected to the cavity of the stem 4 for dispensing the fluid substance.
- the stem 4 also features a second seat 9 for coupling with the piston 3 so that, when the piston 3 is coupled to the stem 4 by means of the second seat 9, the elastic element 7 is essentially devoid of elastic deformation (as shown in Figure 5 , in which the elastic element is shown in the resting condition), while when the piston 4 is coupled to the stem by means of the first seat 8, the elastic element 7 is elastically deformed (for example as shown in Figure 6 , in a configuration with a pre-set preload).
- the term "essentially devoid of elastic deformation" means that the elastic element is in a resting condition, i.e. not taut, or in such a configuration that it does not tend to yield or have reduced elastic capacity even after a long time.
- the first seat 8 is configured to prevent the passage of the piston to the second seat 9 during normal device operation.
- the term 'normal device operation' means operation to dispense a fluid substance.
- the device may be operated by means of a particular rotation of the stem or the application of considerable traction to the dispenser button (and consequently the stem), with dedicated means or systems.
- the second seat 9 may be nearer a free end 4A of the stem than the first seat 8.
- the second seat 9 may feature a first step 13 which permanently limits the movement of the piston (towards the bottom of the compression chamber 5).
- the second seat 9 may also feature a ramp surface 14, positioned between the first seat 8 and the second seat 9, which facilitates the passage of the piston 3 from the second seat 9 to the first seat 8 in the event of a related movement of the stem with respect to the piston (or upon the first activation, when the piston 3 is at the lower stroke limit and further pressure is applied to the dispenser button).
- the piston 3 when the piston 3 is housed in the second seat 9, it is essentially fixed with respect to the stem.
- the first seat 8 features a first step 15 and a second step 16 which permanently limit or permanently prevent the movement of the piston 3 with respect to the stem 4.
- the piston when it is in the first seat 8, the piston may be free to move axially with respect to the stem (for example to clear or close the hole 20 during the various dispensing and suction steps within the compression chamber 5), or it may be fixed, depending on the type of pumping motor featured.
- Figure 7 shows that the piston 3 may feature a throughhole 10 into which the stem 4 is inserted.
- first seat 8 may be defined by a first annular groove 8A machined on the stem 4 externally;
- second seat 9 may also be defined by a second annular groove 9A machined on the stem 4 externally.
- a different configuration of the device may envisage the elastic element 7 being a compression spring M, preferably made of plastic.
- the compression spring 7 may be positioned between a flange 35 on the stem 4 and a tubular element 25 for connection between the collar 23 or the ring nut 24 and the cup-shaped body 2.
- Figure 1 see Figure 1 in which the position of such an elastic element M is shown with a discontinuous line.
- the invention described above is particularly advantageous when used in combination with an elastic element 7 made of an elastomeric material chosen from those described above or with a spring made of a plastic material such as: PP, PE, POM, PBT, PK.
- the elastic elements of this type suffer from a permanent load condition (the condition to which conventional devices are subject during transportation, storage, and display in stores prior to use, due to the preload to which they are subjected) which tends to relax them (make them yield) and therefore to compromise the elastic capacity thereof.
- the present invention it is possible to release the elastic element (or the spring), or rather keep it in a 'non-working' condition (for example undeformed) until the device is used for the first time, so as to make the use thereof more reliable, thus preventing yielding or breakage of the elastic element which would therefore compromise device operation.
- an elastic element made of plastic or elastomer allows the elimination of metal from the device, thereby reducing the costs and weight thereof and improving the recyclability thereof, which is beneficial in terms of environmental impact.
Landscapes
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Description
- The present invention relates to a device for dispensing a fluid substance.
- In particular, it refers to a manually operated device for dispensing a fluid substance such as a cosmetic product, like a soap, a gel, a perfume, a home care product, a product for cleaning, for disinfection, etc.
- Conventional dispensing devices comprise a movable piston for activating a hollow stem inside a compression chamber. The movement counters the action of a spring and is generated by pressure applied by a user to a dispenser button.
- Normally, the spring counter to which the piston moves is made of metal and - even when the device is in the resting condition - is slightly compressed or preloaded, which can lead to the malfunction thereof.
- Furthermore, the presence of metal inside devices which are generally made of plastic can generate recyclability problems.
- Last but not least, the metal spring is one of the most expensive and heaviest components of commonly known dispensing devices.
-
WO2011/036217-A1 describe a known pump. - The object of the present invention is to provide a dispensing device which is improved with respect to the prior art and which overcomes the technical drawbacks thereof.
- A further object of the invention is to provide a device which is more reliable than the commonly known ones, even after long storage periods prior to the sale thereof, and therefore prior to a first activation thereof.
- This and other objects are achieved by means of a dispensing device according to the technical teachings of the claims appended hereto.
- Advantageously, the device may be equipped with a main spring made of an elastomeric or plastic material.
- Another advantage is that the device is less expensive and more environmentally friendly than those according to the prior art.
- Further features and advantages of the innovation will become clearer in the description of a preferred but not exclusive embodiment of the device, illustrated - by way of a non-limiting example - in the drawings annexed hereto, in which:
-
Figure 1 is a schematic sectional view of the device according to the present invention when in a position prior to a first activation thereof; -
Figure 2 is a schematic sectional view of the device inFigure 1 , after a first activation, with the piston in the lower stroke limit position; -
Figure 3 is a schematic sectional view of the device inFigure 1 , with the piston in an upper stroke limit position after a first activation; -
Figures 4, 5, and 6 show an elastic element of the device inFigure 1 in three possible operating positions with, respectively, the elastic element unloaded, with a preload, and with a maximum load; -
Figure 7 shows a detail of the piston and the stem, before a step to assemble the device; and -
Figure 8 and Figure 9 show enlarged details of the parts circled inFigures 1 and2 . - With reference to the figures stated,
reference number 1 is used to denote, as a whole, a fluid substance dispensing device. - The
device 1 comprises a cup-shaped body 2 within which apiston 3 slides in a sealed manner. The piston may feature a single or multiple sealing lips (as shown here). - The cup-
shaped body 2 may be permanently fastened to aninterconnection element 30, which may, in turn, be fastened to atubular element 25. The tubular element may be secured (for example, in a sealed manner) to acollar 23 equipped with aflange 23A on top of which aring nut 24 rests, for example of the threaded variety, for securing the device to a conventional container (not shown) within which thefluid substance 1 is housed. - Obviously, other configurations are possible in addition to the one described above, all of which would be familiar to a person skilled in the art.
- The
piston 3 is coupled with ahollow stem 4 for the movement of thepiston 3 within the cup-shaped body 2. - Therefore, the stem movement drives the piston movement, at least when in an operating configuration.
- The
piston 3 and the cup-shaped body 2 define, at least partially, acompression chamber 5, which comprises at least onevalve element 6 for supplying the fluid substance to the saidcompression chamber 5. - The
valve element 6 can be fluidically connected to asuction tube 31, housed in the container, in a conventional manner. Obviously, thesuction tube 31 may not be present (for example, in the event that the device is coupled with a deformable bag within which the substance is housed). - In the solution shown, the valve element is a ball, preferably made of plastic.
- The
hollow stem 4 can be moved counter to anelastic element 7. - In the configuration described, the
elastic element 7 may be an elastic traction element, preferably an elastomer membrane spring. - Usable elastomeric materials include, for example: thermoplastic polyurethane (TPU), Styrenic thermoplastic elastomers (TPE-S), SEES, copolyesters (COPA), vulcanised thermoplastic elastomers (TPSiV), and thermosetting materials (silicone rubbers).
- The
elastic element 7 is more clearly visible inFigures 4, 5, and 6 , in which it is illustrated in different operating conditions. - The
elastic element 7 may feature afirst end 7B fixed to thestem 3. - For example, an end part of the stem may be coupled to a
sleeve 34 which is snap fastened onto the said stem, and thefirst end 7B may be sandwiched between thesleeve 34 and aflange 35 which extends from the stem. - The
sleeve 34 may act as a (sealed) coupling with adispenser button 36 of the conventional kind. - The
second end 7A of theelastic element 7 may be sandwiched between thetubular element 25 and thecollar 23. - With reference once again to
Figures 5-7 , it should be noted that at least one elasticallyextendable element 7C may be positioned between thefirst end 7B and thesecond end 7A. Theelement 7C may be continuous or may feature lighter or thicker sections orwindows 7D in order to calibrate the elastic response thereof. - In this configuration, the elastic element is made as one piece with a single elastomeric material but there is nothing to prevent it being made of several assembled pieces. And obviously it may also have a different configuration from the one illustrated here.
- The
stem 4 has afirst seat 8 for coupling with thepiston 3. In thefirst seat 8, the piston may be conventionally movable (i.e. sliding axially along the stem in a limited manner) so as to clear or close up afluid passageway 20 connected to the cavity of thestem 4 for dispensing the fluid substance. - According to the invention, the
stem 4 also features asecond seat 9 for coupling with thepiston 3 so that, when thepiston 3 is coupled to thestem 4 by means of thesecond seat 9, theelastic element 7 is essentially devoid of elastic deformation (as shown inFigure 5 , in which the elastic element is shown in the resting condition), while when thepiston 4 is coupled to the stem by means of thefirst seat 8, theelastic element 7 is elastically deformed (for example as shown inFigure 6 , in a configuration with a pre-set preload). - In this document, the term "essentially devoid of elastic deformation" means that the elastic element is in a resting condition, i.e. not taut, or in such a configuration that it does not tend to yield or have reduced elastic capacity even after a long time.
- Upon a first activation of the device (and therefore following the application of pressure to the
dispenser button 36 and until thepiston 3 reaches the stroke limit thereof), thepiston 3 moves from thesecond seat 9 to thefirst seat 8. SeeFigure 2 . - This takes place following a related movement of the
stem 4 with respect to the piston 3 (which encounters a stop at the stroke limit) upon the first activation of the device. - The
first seat 8 is configured to prevent the passage of the piston to thesecond seat 9 during normal device operation. - The term 'normal device operation' means operation to dispense a fluid substance.
- This does not prevent a specific system or means being featured to return the piston to the
second seat 9, for example in preparation for a long period of non-use of the device. For example, the device may be operated by means of a particular rotation of the stem or the application of considerable traction to the dispenser button (and consequently the stem), with dedicated means or systems. - The
second seat 9 may be nearer afree end 4A of the stem than thefirst seat 8. - Furthermore, the
second seat 9 may feature afirst step 13 which permanently limits the movement of the piston (towards the bottom of the compression chamber 5). Thesecond seat 9 may also feature aramp surface 14, positioned between thefirst seat 8 and thesecond seat 9, which facilitates the passage of thepiston 3 from thesecond seat 9 to thefirst seat 8 in the event of a related movement of the stem with respect to the piston (or upon the first activation, when thepiston 3 is at the lower stroke limit and further pressure is applied to the dispenser button). - Advantageously, when the
piston 3 is housed in thesecond seat 9, it is essentially fixed with respect to the stem. - The
first seat 8 features afirst step 15 and asecond step 16 which permanently limit or permanently prevent the movement of thepiston 3 with respect to thestem 4. - Therefore, when it is in the
first seat 8, the piston may be free to move axially with respect to the stem (for example to clear or close thehole 20 during the various dispensing and suction steps within the compression chamber 5), or it may be fixed, depending on the type of pumping motor featured. -
Figure 7 shows that thepiston 3 may feature a throughhole 10 into which thestem 4 is inserted. - In this case, the
first seat 8 may be defined by a firstannular groove 8A machined on thestem 4 externally; thesecond seat 9 may also be defined by a secondannular groove 9A machined on thestem 4 externally. - A different configuration of the device may envisage the
elastic element 7 being a compression spring M, preferably made of plastic. - For example, the
compression spring 7 may be positioned between aflange 35 on thestem 4 and atubular element 25 for connection between thecollar 23 or thering nut 24 and the cup-shapedbody 2. Regarding this aspect, seeFigure 1 in which the position of such an elastic element M is shown with a discontinuous line. - The invention described above is particularly advantageous when used in combination with an
elastic element 7 made of an elastomeric material chosen from those described above or with a spring made of a plastic material such as: PP, PE, POM, PBT, PK. - As is known, the elastic elements of this type suffer from a permanent load condition (the condition to which conventional devices are subject during transportation, storage, and display in stores prior to use, due to the preload to which they are subjected) which tends to relax them (make them yield) and therefore to compromise the elastic capacity thereof.
- With the present invention, it is possible to release the elastic element (or the spring), or rather keep it in a 'non-working' condition (for example undeformed) until the device is used for the first time, so as to make the use thereof more reliable, thus preventing yielding or breakage of the elastic element which would therefore compromise device operation.
- Furthermore, use of an elastic element made of plastic or elastomer allows the elimination of metal from the device, thereby reducing the costs and weight thereof and improving the recyclability thereof, which is beneficial in terms of environmental impact.
- Various embodiments of the innovation have been disclosed herein, but further embodiments may also be conceived according to the annexed claims.
Claims (8)
- Dispensing device (1) of a fluid substance, comprising a cup-shaped body (2) in which a piston (3) slides sealingly, the piston (3) being associated with a hollow stem (4) for moving the piston (3) in the cup-shaped body (2), the piston (3) and the cup-shaped body (2) defining at least partially a compression chamber (5) which comprises at least one valve element (6) for feeding the fluid substance to the compression chamber (5), the hollow stem (4) being movable in contrast to an elastic element (7), the hollow stem (4) providing a first seat (8) for coupling with the piston (3), the stem (4) also having a second seat (9) for coupling with the piston (3), characterized in that, when the piston (3) is coupled to the stem (4) through the second seat (9), the elastic element (7) is substantially free from elastic deformation, while when the piston (4) is coupled to the stem through the first seat (8) the elastic element (7) is elastically deformed, the piston (3) moving from the second (9) to the first seat (8) at least following to a relative movement of the stem (4) with respect to the piston (3) at a first actuation of the device, the first seat (8) being configured to prevent, during normal operation of the device, the passage of the piston to the second seat (9), the first seat (8) providing a first (15) and a second step (16) which stably limit or stably prevent the movement of the piston (3) with respect to the stem (4) .
- Device according to claim 1, wherein the second seat (9) is closer to a free end (4A) of the stem than the first seat (8).
- Device according to claim 1, wherein the second seat (9) provides a first step (13) which stably limits the movement of the piston, and a ramp surface (14), arranged between the first (8) and the second seat (9), which helps the passage of the piston (3) from the second (9) to the first seat (8).
- Device according to claim 1, wherein the piston (3) has a through hole (10) in which the stem (4) is inserted and wherein the first seat (8) is first defined by an annular groove (8A) obtained externally on the stem (4) and / or in which the second seat (9) is defined by a second annular groove (9A) obtained externally on the stem (4).
- Device according to claim 1, wherein, at the first seat (8), a fluid passage (20) is provided which can be closed or open according to the position of the piston (3) with respect to the stem (4) in the first seat (8).
- Device according to claim 1, wherein the elastic element (7) is a traction elastic element, preferably an elastomer membrane spring.
- Device according to the preceding claim, wherein the elastic element (7) has a first end (7B) fixed to the stem (4) and / or a second end (7A) fixed to a collar (23) or to a ring nut (24) of the device, at least one elastically extensible element (7C) being arranged between the first and second ends.
- Device according to claim 1, wherein the elastic element (7) is a compression spring, preferably of plastic material, and / or in which the compression spring (7) is located between a flange of the stem (4) and a tubular element (25) for connection between the collar (23) or the ring nut (24) and the cup-shaped body (2).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102020000022504A IT202000022504A1 (en) | 2020-09-24 | 2020-09-24 | FLUID SUBSTANCE DELIVERY DEVICE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3974065A1 EP3974065A1 (en) | 2022-03-30 |
EP3974065B1 true EP3974065B1 (en) | 2023-12-20 |
Family
ID=73699290
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21198320.0A Active EP3974065B1 (en) | 2020-09-24 | 2021-09-22 | A fluid substance dispensing device |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3974065B1 (en) |
IT (1) | IT202000022504A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITVI20060019A1 (en) * | 2006-01-17 | 2007-07-18 | Taplast Spa | DEVICE FOR THE DELIVERY OF GAS-LIQUID MIXTURES |
ITMI20091648A1 (en) * | 2009-09-25 | 2011-03-26 | Modapack S R L | "GROUP FOR THE PRESSURIZATION AND DISTRIBUTION OF FLUID SUBSTANCES FOR A MANUAL-OPERATED PUMP AND PUMP INCLUDING THE GROUP" |
IT1404092B1 (en) * | 2011-01-31 | 2013-11-08 | Taplast Srl | DEVICE FOR DISTRIBUTION OF FLUIDS OR MIXTURES. |
BR112017010486A2 (en) * | 2014-11-20 | 2018-04-03 | Taplast Spa | elastic member, and method and mold for preparing an elastic member. |
-
2020
- 2020-09-24 IT IT102020000022504A patent/IT202000022504A1/en unknown
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2021
- 2021-09-22 EP EP21198320.0A patent/EP3974065B1/en active Active
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Publication number | Publication date |
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IT202000022504A1 (en) | 2022-03-24 |
EP3974065A1 (en) | 2022-03-30 |
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