CA1109436A - Horizontally-operated integrally-molded pump-type dispenser having improved valve access - Google Patents
Horizontally-operated integrally-molded pump-type dispenser having improved valve accessInfo
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- CA1109436A CA1109436A CA333,742A CA333742A CA1109436A CA 1109436 A CA1109436 A CA 1109436A CA 333742 A CA333742 A CA 333742A CA 1109436 A CA1109436 A CA 1109436A
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- valve
- reservoir
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Abstract
Abstract of the Disclosure.
A horizontally reciprocable pump for dispensing heavy liquids such as lotion soaps, has an integrally molded body. Both the inlet and outlet valves are held in place by the same spring which biases the plunger. A hori-zontal pump cylinder is separated from a reservoir supply by a wall having a concentric horizontal inlet aperture, whose forward side is sealed by a molded rubber reverse-flow resisting inlet valve. A radially enlarged flange about the body of the inlet valve has a tapered compression surface to bear against the end wall about its inlet aperture and a bearing surface on its opposite side. The discharge valve, retained against a reducing shoulder inside the plunger discharge passage, is held by the smaller end of a tapered compression spring, whose larger end bears against the flange of the inlet valve. The hollow discharge plunger is retained slidably within the cylinder by a pair of split bushings which, upon removal, permit complete disassembly and servicing of the pump from its forward end. This allows adaptation for wall mounting, or mounting beneath a supply reservoir, or as an outlet from a remote supply source.
A horizontally reciprocable pump for dispensing heavy liquids such as lotion soaps, has an integrally molded body. Both the inlet and outlet valves are held in place by the same spring which biases the plunger. A hori-zontal pump cylinder is separated from a reservoir supply by a wall having a concentric horizontal inlet aperture, whose forward side is sealed by a molded rubber reverse-flow resisting inlet valve. A radially enlarged flange about the body of the inlet valve has a tapered compression surface to bear against the end wall about its inlet aperture and a bearing surface on its opposite side. The discharge valve, retained against a reducing shoulder inside the plunger discharge passage, is held by the smaller end of a tapered compression spring, whose larger end bears against the flange of the inlet valve. The hollow discharge plunger is retained slidably within the cylinder by a pair of split bushings which, upon removal, permit complete disassembly and servicing of the pump from its forward end. This allows adaptation for wall mounting, or mounting beneath a supply reservoir, or as an outlet from a remote supply source.
Description
1~943~6 HORIZONTALLY-OPERATED INTEGRALLY-MOLDED PUMP-TYPE DISPENSER
HAVING IMPROVED VALVE ACCESS
The present invention relates to a horizontally-reciprocating plunger-type pump for dispensing heavy liquids, such as lotion soaps, from a supply source such as a reservoir vessel.
My prior U.S. Patent No. 3,966,095 utilizes two molded valves whose projecting lips prevent reverse flow, which are referred to as "duck-bill"
type valves; the inlet valve is held in place between an internal shoulder and a screwed-in dip tube, and the outlet valve is held within a plunger by a plunger-reacting coil spring. The pump cylinder and dip tube assembly must be removed from the wall bracket to gain access to the inlet valve. The apparatus shown in my prior patent is not intended for gravity flow use.
A purpose of the present invention is to provide a horizontally-operated pump for dispensing liquids from a reservoir, and more specifically to provide such a pump whose cylinder and housing are integrally molded and which is easily assembled and disassembled without disturbing the reservoir.
Another purpose is to provide an easily serviced pump mechanism adapted for meeting that variety of mounting situations as are commonly utilized for hand cleaners. Other purposes will be apparent from the detailed description which follows.
Briefly summarizing, the present invention comprises a horizontal pump whose housing is integrally molded with a pump cylinder having a rear end ~ -wall with an inlet aperture to admit the fluid to be dispensed. A hollow plunger having an enlarged piston on its inner end is fitted within the pump cylinder and maintained there slidably by a pair of bushing halves pressed into the end of the cylinder and fastened by set screws. An inner passage within the plunger extends between a vertical outlet at the pump handle and an inlet at the aft end of the plunger, at which a molded rubber valve similar to that of my said prior patent, or a ball-check valve where appropriate, is mounted against an internal shoulder. At the opposite end of the cylinder, a duck-bill valve, having a hollow body including an inlet bore leading to pressure sealable outlet lips and having a radially enlarged flange, is held against _ 1 _ 9~36 the cylinder end wall by the larger end of a tapered compression spring, which extends from the valve flange to the plunger check-valve. The aft side of the valve flange is tapered for seating and sealing with the end wall around the inlet aperture.
Aft of the end wall, the dispenser body has an inlet from a reservoir vessel or other liquid supply source. Where the inlet receives fluid by gravityflow under a substantial pressure head, the plunger valve is preferably of the ball-check type; under these circumstances the pump mechanism is advantageous ,j because it dispenses a measured quantity of the liquid. Alternatively, where the invention is used with a flange supporting a reservoir vessel on the under-side of the pump housing, a simple molded rubber type plunger valve is used advantageously, to furnish that greater vacuum required to raise the liquid, especially if the liquid is viscous and heavy.
FIG. 1 is an exploded view, partly in cross-section, of a preferred embodiment of the present dispensing pump.
FIG. 2 is a cross-sectional view, similar to FIG. 1, showing the pump of FIG. 1 assembled.
FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2.
FIG. 4 is an enlarged view, partly in elevation and partly in cross-section, showing the molded rubber inlet valve utilized in the preferredembodiment shown in FIGS. 1-3.
FIG. 5 is a cross-section of the valve of FIG. 4 taken along line 5-5 of FIG. 4-FIG. 6 shows a washer having an annular spring-receiving groove which aids in installation of the valve of FIGS. 4 and 5.
FIG. 7 is a cross-sectional view of an alternative embodiment of the horizontally acting dispensing pump, as employed as one of a plurality of inlets from a central supply reservoir.
FIG. 8 is a cross-sectional view of a portion of a second alternative embodiment, as mounted heneath a reservoir of a type used for powdered hand cleaners.
In the preferred embodiment of the present invention, heavy lotion ~1~9~3~
soap pf SAE 70 viscosity is dispensed from a reservoir vessel, here a plastic bottle a having an externally-threaded upper inlet b, as shown in FIG. 1.
The preferred embodiment of the horizontally operated dispensing pump has a dispenser body, generally designated 10, which extends from an aft mounting bracket portion 11 forward to a reservoir vessel support portion, generally designated 20, on its underside and further forward to a pump cylinder portion, generally designated 40, shown in FIG. 1. The mounting bracket portion 11 has an integral plate-like wall-mounting bracket 12, in-cluding mounting bores 13. The reservoir support portion 20 is molded on the underside of the dispenser body 10 and includes an annular flange or cylindricalreservoir-receiving portion 21 which has internal threads 22 to receive the externally-threaded inlet b of the plastic bottle a, to secure it on the under-side of the dispenser body 10. Molded at the middle of the upper side of the interior of the annular flange 21 is a concentric inner inlet portion 23, threaded internally to receive an externally-threaded dip tube, described below. Radially outward of the inner inlet portion 23, within the annular flange 21, is an upward-extending annular groove 24. An air inlet 25 extends from the annular groove 24, through the annular flange 21 to its outer side.
To draw the liquid up from the reservoir vessel, there is provided a ~ -conduit dip tube, generally designated 30 and shown in FIG. 1, which has a hollow plastic threaded fitting 31 having external threads which screw into the internally threaded inner inlet portion 23 within the annular flange 21.
A flexible plastic tube 32, long enough to extend to the bottom of the plastic bottle a, passes through the hollow threaded fitting 31 and is held in place by the tube's flared upper end 33.
The remainder of the dispenser body 10 will now be described. The body 10 further includes, at its foremost end, a pump cylinder portion 40 in-cluding a horizontal hollow cylinder 41 extending fore to aft. Internally, the cylinder 41 includes a forward~end portion 42 having on its lower side a pair of threaded bores accepting set-screws 43 which extend inward from the outer side of the cylinder 41. Aft of the forward end portion 42, the cylinder 41 has an internal reduci~ng shoulder 44 and a smaller diameter aft or piston-receiving portion 45. The piston-receiving cylinder portion 45 extends aft to an end wall 46, which is just forward of the inner inlet portion 23 within the annular flange 21. The end wall 46 has a concentric inlet aperture 47 from a connecting bore 49 whose aft end communicates with a vertical bore 48 which connects to the inner inlet portion 23.
The hollow cylinder 41 receives a hollow plunger, generally desig-nated 50, best shown in FIG. 1, which on its outer side extends from an aft piston end portion 51, having an annular groove 52 into which is fitted an 0-ring 53, to a reducing shoulder 54 and then a slide portion 55 of reduced diameter, which has a lengthwise outwardly-molded key 56 on its lower side. At its forward end the plunger 50 has a pump handle 58. Internally, the plunger 50 has an inner passage 59 connecting from a vertical discharge passage 60 in the pump handle 58 aft through the plunger 50 to an aft-facing shoulder 61 and an enlarged diameter portion 62 inside the piston end portion 51.
Secured within the aft cylinder portion 45 of the pump cylinder por-tion 4Q are a complementary pair of split bushings: an upper bushing half 71 having vertical receiving bores 72 in its lower side, and a lower bushing half 73 having pins 74 on its upper side to fit into the upper bushing half 72, as shown in FIGS. 2 and 3. A pair of hollows 76 on its lower side accept the inner ends of set screws 43. The bushing halves 71, 73 are so sized as to accept between them slidably the plunger slide portion 55, internally, the lower bushing half 73 has a key slot 75 to accept the molded key 56 on the plunger slide portion 55.
A pump inlet valve 80, shown in FIGS. 4 and 5, i.s fitted within the aft cylinder portion 45 of the pump cylinder portion 40 on the forward side of the end wall 46. The valve 80 is of the type having molded rubber lips and sometimes known as a duck-bill valve, and serves as a reverse flow resisting valve. It has a hollow body portion 81 whose inlet bore 82 leads to sealable outlet lips 83 on its forward or outlet end. The valve 8Q further has a radially enlarged flange 85, including an annular bearing surface 86 on its outlet side and a tapered compression surface 87 on its inlet or aft side.
The hollow body portion 81 of the pump inlet valve 80 carries a '` 11~9~31~
plastic mounting washer 90 sized to fit within the aft end cylinder portion 45 of the hollow cylinder 41. The washer 90 is fitted on the hollow bDdy portion 81 and against the annular beari.ng surface 86 of the inlet valve 80.
Further forward within the hollow cylinder 41 is provided a tapered compression spring 95 having its larger diameter end 96 bearing on the washer 90, which in turn bears against the flange 85 of the inlet valve 80. Its smaller diameter end 97 extends to the piston end porti.on 51 of the hollow plunger 50.
A conventional molded rubber duck-bill valve 100 is provided within the enlarged diameter portion 62 in the aft end of the plunger inner passage 59. The plunger valve 100 has a hollow cylindrical body portion 101 extending to a forward edge 102 which abuts the enlarging shoulder 61 of the plunger inner passage 59, into which the valve lips 103 extend.
An alternative mounting washer 110 is shown i.n FI.G. 6, fitted to the pump inlet valve 80. The washer has a central bore lll having an inner di-ameter of such size as to snugly receive the outer side of the inlet valve :-hollow body portion 81; thus the valve 8Q is mounted onto the washer 110. The ~ -perimetrical surface of the washer 110 has an annular spring-receiving groove ~ `
112 of such size as to engage the endmost loop of the larger diameter end 96 of the tapered compression spring 95; along the flange at the inner side of the groove 112 is a broad notch 113 which accepts that coil of the spring 95 which leads to i.ts endmost loop. This serves to mount the washer 110 and valve 80 to the spring 95, for insertion into and removal from the horizontal hollow cylinder 41.
FIG. 7 shows an alternative hori.zontally-operated dispensing pump adapted for use in a washroom in which multi.ple conduits lead from a single reservoir of soap lotion mounted above the level of the pump. In this alter-native embodiment, a ball-check valve is used in the plunger, as hereinafter described. A pump body, generally designated 120, is barrel-shaped and has an inlet end 121 having internal threads: l22 whi.ch may b.e engaged to piping c, shown in phantom lines, which leads from a remote res.ervoir at a higher eleva-tion. Immediately forward of the threaded i:nlet end 121 i.s. provi.ded an end 9~
wall 123 having a concentric inlet aperture 124, as in the preferred embodi-ment described above. Forward of the end wall 123, the pump body 120 has a piston-receiving cylinder portion 125 extending to an internal shoulder 126 and having an increased radius forward end portion 127, like that of the above-described preferred embodiment.
Again, a hollow plunger 130 is slidably fitted within the aft cylinder portion 125. Like the plunger 50 of the preferred embodiment, the plunger 130 has a piston end portion 131 having an annular groove 132 bearing an 0-ring 133. Forward of the piston end portion 131 is a reducing shoulder 134 leading to a reduced diameter slide portion 135, which similarly has a molded key l36 on its lower side. The plunger 130 has at its forward end an enlarged pump handle 138. Inwardly, the plunger 130 has an inner passage 139 extending rearward from a vertical discharge passage 140 within the pump handle 138 to a first internal shoulder 141 inside the slide portion 135 and thence to a second internal shoulder 142 within the piston end portion 131j at both shoulders 141, 142 the interior diameter of the passage 14G i:s successive-ly enlarged. Aft of the second shoulder l42, the plunger inner passage 139 is referred to as the enlarged diameter portion 143.
The alternative embodiment utilizes split bushings 71, 73 identical - 20 to the bushings described in the above preferred embodiment. Likewise the pump inlet valve 80, shown in FIGS. 4 and 5, is identical and is similarly placed adjacent the end wall 123 with a surrounding washer 9Q and an identical tapered compression spring 95.
The ball-check type plunger valve, generally designated 150, utilizes a small, easily-deflected compression spring 151 extending aft from the first shoulder 141 to a sealing ball 152 which is fitted within the inner passage 139 just forward of the second shnulder 142 and held in place by a removable hollow valve seat 153 which fits within the plunger enlarged diameter portion 143 against the second shoulder 142. The advantages of using a ball-check valve at the outlet of a pump system having a rubber lip inlet valve will be discussed hereafter.
FIG. 8 shows a second alternative embodiment of the present inven-tion, for use with a conventional bottom feeding reservoir or supply tank, designated d and shown in phantom lines. The tank d has a pair of spaced-apart flanged outlets e on its lower side, each outwardly tapered as it extends downward. This alternative embodiment has a cylindrical dispenser body, generally designated 160, which is identical to the pump body 120 of the first alternative embodiment forward of its end wall 123, except that it utilizes the alternative mounting washer of FIG. 6.
Aft of the end wall 123, the body 120 is notably differenti it continues rearward to a cylindrical mounting portion 161 which has a pair of tapered nipples 162 on its upper side which are so sized, tapered and spaced apart as to engage the upwardly tapered outlets e in the supply tank d. Each nipple 162 has a threaded central vertical bore 163 leading downward to a conduit passage 164 within the cylindrical mounting portion 161 which leads forward to the concentric inlet aperture 124 in the end wall 123.
For each tapered nipple there is provided within the tank d a tubu-lar stud, generally designated l65, having a threaded shank l66 to screw into the nipple central vertical bore 163 and having a hexagonal top l67. An inner bore 168 extends downward the entire length of the stud 165.
Manufacture of the present i:nvention is by conventional methods. As will be apparent to persons skilled in molding of plastics., molds for the dispenser body 10 are preferably made up of several sections,-so that portions aft of the pump cylinder portion 40, which vary among the several embodiments, may be provided by changing the mold sections for these portions.
In use of the preferred embodiment first descrihed above, assembly, as well as disassembly, is very easily performed. The dispenser hody 10 is screw-mounted to a wall by the mounting bracket 13. The dip tube:30 is screwed by its threaded fitting 31 into the internally threaded-inner inlet portion 23 of the reservoir support portion 20 and the plastic bottle a, containing liquid soap for dispensing, is then screwed by its threaded upper inlet h into the flange 21. Before installing the plunger, the pump inlet valYe 80 is put into place with its outlet lips 83 forward and its flange tapered compression sur-face against the pump cylinder end wall 46, and with the washer 90 about its body portion 81. The compression spring 95 is placed within the cylinder 41 with its large diameter end 96 against the washer 90. The plunger 50 is readied for installation by installing the 0-ring 53 in the annular groove 52, placing the bushing halves 71, 73 about its sli.de portion 55, and placing the . plunger valve 100 within the enlarged diameter portion 62 of its inner passage 59 against the shoulder 61. Then the plunger 50 is pushed into the hollow cylinder 41 against the resistance of the compression spring 95, the hushing halves 71, 73 are pressed into the forward end portion 42 against the reducing shoulder 44 of the hollow cyli.nder 41 and the set-s.crews 43 are tightened i.nto the hollows 76 in the lower bushing half 73, concluding the assembly. Thus, the pump inlet valve 80 and plunger valve 100 are held in place on opposite ends of the spring 95.
t In use, the pump handle 58 is pressed to push the plunger aft, driv-ing air out through the plunger valve 100 while the inlet valve 80 remains sealed. When the handle 58 is released, liquid is pulled up through the dip tube 30 and the pump inlet valve 80 to fill the void left by the air driven out, while the forward projecting lips of the plunger valve remain sealed. If the plunger 50 is then pushed aft, the plunger valve 100 opens, while the pump inlet valve 80 remains closed, forcing the liquid out through the inner passage Z0 59 and down through the vertical discharge passage 60. When the plunger 50 is then released, liquid will again be drawn up to fill the cylinder 41. The lips of the valves 80, 100 seal s.o tightly agains.t the inflow of air that heavy liquid soaps may be lifted from a newly supplied bottle a without priming with water, as may be required when other valves are used.
. Numerous advantages are obtained by this constructi:on. Primarily, by the unique placement of the pump i.nlet valve 80 forward of the end wall 46, .
and utilization of the compression spring 95 to hold both the~pump i.nlet valve 80 as well as the plunger valve 100 i.n place during use, both ass.embly and dis.-assembly for cleaning, inspection, and repair is. simplifi.ed; all w.orking parts are then accessible. The bushi.ng halves 71, 73 held together by pins 74 and maintained.in place within the hollow cylinder 41 by the:set-screws.43 uniquely permit removal of the plunger 50. Likewise, the integral construction of the mounting bracket portion 11, the reservoir support portion 20 and the pump cylinder portion 40 along with the feature of the concentric inlet aperture 47 and vertical bore 48 leading to the inner inlet portion 23 which receives the dip tube 30 again makes disassembly and reassemb.ly easy.
The alternative mounting washer 110, shown in the enlarged FIG. 6, is advantageously pre-mounted to the i.nlet valve 80. Its outer annular spring-receiving groove 112 mounts the washer and valve within the final loop of the compression spring large diameter end ~6. This facilitates insertion into and removal of the valve from the horizontally mounted pump cylinder.
In the alternative dispenser for use w;th a remote s.upply shown in FIG. 7, a conventional ball-type check valve 150 is used as the plunger dis-charge valve. The use of this valve permits placement of the remote supply at a level substantially above the dispenser, even in a janitorial storage room several floors above the dispenser. In such use, molded rubber valves may leak due to the increased pressure.exerted, but any leakage pas:t the valve 80 will be stopped by the ball-check valve 150. Such a double-valved dispenser, when . used in a gravity-feed type system, as in washrooms having a plurality of dis-pensing outlets, dispenses a measured quantity of liquid. To serve this pur-; pose, the embodiment of FIG. 7 may advantageously be substituted for conven-tional non-measuring discharge valves.
The alternative dispenser for use with the bottom feeding supply tank, : fragmentarily shown in FIG. 8, again operates substantially like the two ahove-described embodiments, but is specially adapted to fit in such a conventi.onal supply tank, sometimes used to supply granular soap in factory washrooms. The integrally molded nipples 162 serve both. to mount the dispenser to the under-side of the tank d rigidly, without possibility of any angular movement, and to communicate the liquid soap therefrom.
Modifications of the various: embDdi.ments described above will he ap-parent to persons skilled in the art. For example, with mi.nor modifications, the embodiment of FIG. 1 may be used inverted, with a res.ervoi.r.ahove instead .
of the bottle a.and without the di.p:tuhe. The mi:nor modificàti.ons for ~uch us.e include omitting the air inlet 25 and suitably installing the.hushing _g_ 11~9~36 halves 71 and 72, and the plunger 50, s.o that the discharge passage 60 in the handle 58 is nevertheless presented downward. From these examples, other forms of the present invention will suggest themselves.
, :
HAVING IMPROVED VALVE ACCESS
The present invention relates to a horizontally-reciprocating plunger-type pump for dispensing heavy liquids, such as lotion soaps, from a supply source such as a reservoir vessel.
My prior U.S. Patent No. 3,966,095 utilizes two molded valves whose projecting lips prevent reverse flow, which are referred to as "duck-bill"
type valves; the inlet valve is held in place between an internal shoulder and a screwed-in dip tube, and the outlet valve is held within a plunger by a plunger-reacting coil spring. The pump cylinder and dip tube assembly must be removed from the wall bracket to gain access to the inlet valve. The apparatus shown in my prior patent is not intended for gravity flow use.
A purpose of the present invention is to provide a horizontally-operated pump for dispensing liquids from a reservoir, and more specifically to provide such a pump whose cylinder and housing are integrally molded and which is easily assembled and disassembled without disturbing the reservoir.
Another purpose is to provide an easily serviced pump mechanism adapted for meeting that variety of mounting situations as are commonly utilized for hand cleaners. Other purposes will be apparent from the detailed description which follows.
Briefly summarizing, the present invention comprises a horizontal pump whose housing is integrally molded with a pump cylinder having a rear end ~ -wall with an inlet aperture to admit the fluid to be dispensed. A hollow plunger having an enlarged piston on its inner end is fitted within the pump cylinder and maintained there slidably by a pair of bushing halves pressed into the end of the cylinder and fastened by set screws. An inner passage within the plunger extends between a vertical outlet at the pump handle and an inlet at the aft end of the plunger, at which a molded rubber valve similar to that of my said prior patent, or a ball-check valve where appropriate, is mounted against an internal shoulder. At the opposite end of the cylinder, a duck-bill valve, having a hollow body including an inlet bore leading to pressure sealable outlet lips and having a radially enlarged flange, is held against _ 1 _ 9~36 the cylinder end wall by the larger end of a tapered compression spring, which extends from the valve flange to the plunger check-valve. The aft side of the valve flange is tapered for seating and sealing with the end wall around the inlet aperture.
Aft of the end wall, the dispenser body has an inlet from a reservoir vessel or other liquid supply source. Where the inlet receives fluid by gravityflow under a substantial pressure head, the plunger valve is preferably of the ball-check type; under these circumstances the pump mechanism is advantageous ,j because it dispenses a measured quantity of the liquid. Alternatively, where the invention is used with a flange supporting a reservoir vessel on the under-side of the pump housing, a simple molded rubber type plunger valve is used advantageously, to furnish that greater vacuum required to raise the liquid, especially if the liquid is viscous and heavy.
FIG. 1 is an exploded view, partly in cross-section, of a preferred embodiment of the present dispensing pump.
FIG. 2 is a cross-sectional view, similar to FIG. 1, showing the pump of FIG. 1 assembled.
FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2.
FIG. 4 is an enlarged view, partly in elevation and partly in cross-section, showing the molded rubber inlet valve utilized in the preferredembodiment shown in FIGS. 1-3.
FIG. 5 is a cross-section of the valve of FIG. 4 taken along line 5-5 of FIG. 4-FIG. 6 shows a washer having an annular spring-receiving groove which aids in installation of the valve of FIGS. 4 and 5.
FIG. 7 is a cross-sectional view of an alternative embodiment of the horizontally acting dispensing pump, as employed as one of a plurality of inlets from a central supply reservoir.
FIG. 8 is a cross-sectional view of a portion of a second alternative embodiment, as mounted heneath a reservoir of a type used for powdered hand cleaners.
In the preferred embodiment of the present invention, heavy lotion ~1~9~3~
soap pf SAE 70 viscosity is dispensed from a reservoir vessel, here a plastic bottle a having an externally-threaded upper inlet b, as shown in FIG. 1.
The preferred embodiment of the horizontally operated dispensing pump has a dispenser body, generally designated 10, which extends from an aft mounting bracket portion 11 forward to a reservoir vessel support portion, generally designated 20, on its underside and further forward to a pump cylinder portion, generally designated 40, shown in FIG. 1. The mounting bracket portion 11 has an integral plate-like wall-mounting bracket 12, in-cluding mounting bores 13. The reservoir support portion 20 is molded on the underside of the dispenser body 10 and includes an annular flange or cylindricalreservoir-receiving portion 21 which has internal threads 22 to receive the externally-threaded inlet b of the plastic bottle a, to secure it on the under-side of the dispenser body 10. Molded at the middle of the upper side of the interior of the annular flange 21 is a concentric inner inlet portion 23, threaded internally to receive an externally-threaded dip tube, described below. Radially outward of the inner inlet portion 23, within the annular flange 21, is an upward-extending annular groove 24. An air inlet 25 extends from the annular groove 24, through the annular flange 21 to its outer side.
To draw the liquid up from the reservoir vessel, there is provided a ~ -conduit dip tube, generally designated 30 and shown in FIG. 1, which has a hollow plastic threaded fitting 31 having external threads which screw into the internally threaded inner inlet portion 23 within the annular flange 21.
A flexible plastic tube 32, long enough to extend to the bottom of the plastic bottle a, passes through the hollow threaded fitting 31 and is held in place by the tube's flared upper end 33.
The remainder of the dispenser body 10 will now be described. The body 10 further includes, at its foremost end, a pump cylinder portion 40 in-cluding a horizontal hollow cylinder 41 extending fore to aft. Internally, the cylinder 41 includes a forward~end portion 42 having on its lower side a pair of threaded bores accepting set-screws 43 which extend inward from the outer side of the cylinder 41. Aft of the forward end portion 42, the cylinder 41 has an internal reduci~ng shoulder 44 and a smaller diameter aft or piston-receiving portion 45. The piston-receiving cylinder portion 45 extends aft to an end wall 46, which is just forward of the inner inlet portion 23 within the annular flange 21. The end wall 46 has a concentric inlet aperture 47 from a connecting bore 49 whose aft end communicates with a vertical bore 48 which connects to the inner inlet portion 23.
The hollow cylinder 41 receives a hollow plunger, generally desig-nated 50, best shown in FIG. 1, which on its outer side extends from an aft piston end portion 51, having an annular groove 52 into which is fitted an 0-ring 53, to a reducing shoulder 54 and then a slide portion 55 of reduced diameter, which has a lengthwise outwardly-molded key 56 on its lower side. At its forward end the plunger 50 has a pump handle 58. Internally, the plunger 50 has an inner passage 59 connecting from a vertical discharge passage 60 in the pump handle 58 aft through the plunger 50 to an aft-facing shoulder 61 and an enlarged diameter portion 62 inside the piston end portion 51.
Secured within the aft cylinder portion 45 of the pump cylinder por-tion 4Q are a complementary pair of split bushings: an upper bushing half 71 having vertical receiving bores 72 in its lower side, and a lower bushing half 73 having pins 74 on its upper side to fit into the upper bushing half 72, as shown in FIGS. 2 and 3. A pair of hollows 76 on its lower side accept the inner ends of set screws 43. The bushing halves 71, 73 are so sized as to accept between them slidably the plunger slide portion 55, internally, the lower bushing half 73 has a key slot 75 to accept the molded key 56 on the plunger slide portion 55.
A pump inlet valve 80, shown in FIGS. 4 and 5, i.s fitted within the aft cylinder portion 45 of the pump cylinder portion 40 on the forward side of the end wall 46. The valve 80 is of the type having molded rubber lips and sometimes known as a duck-bill valve, and serves as a reverse flow resisting valve. It has a hollow body portion 81 whose inlet bore 82 leads to sealable outlet lips 83 on its forward or outlet end. The valve 8Q further has a radially enlarged flange 85, including an annular bearing surface 86 on its outlet side and a tapered compression surface 87 on its inlet or aft side.
The hollow body portion 81 of the pump inlet valve 80 carries a '` 11~9~31~
plastic mounting washer 90 sized to fit within the aft end cylinder portion 45 of the hollow cylinder 41. The washer 90 is fitted on the hollow bDdy portion 81 and against the annular beari.ng surface 86 of the inlet valve 80.
Further forward within the hollow cylinder 41 is provided a tapered compression spring 95 having its larger diameter end 96 bearing on the washer 90, which in turn bears against the flange 85 of the inlet valve 80. Its smaller diameter end 97 extends to the piston end porti.on 51 of the hollow plunger 50.
A conventional molded rubber duck-bill valve 100 is provided within the enlarged diameter portion 62 in the aft end of the plunger inner passage 59. The plunger valve 100 has a hollow cylindrical body portion 101 extending to a forward edge 102 which abuts the enlarging shoulder 61 of the plunger inner passage 59, into which the valve lips 103 extend.
An alternative mounting washer 110 is shown i.n FI.G. 6, fitted to the pump inlet valve 80. The washer has a central bore lll having an inner di-ameter of such size as to snugly receive the outer side of the inlet valve :-hollow body portion 81; thus the valve 8Q is mounted onto the washer 110. The ~ -perimetrical surface of the washer 110 has an annular spring-receiving groove ~ `
112 of such size as to engage the endmost loop of the larger diameter end 96 of the tapered compression spring 95; along the flange at the inner side of the groove 112 is a broad notch 113 which accepts that coil of the spring 95 which leads to i.ts endmost loop. This serves to mount the washer 110 and valve 80 to the spring 95, for insertion into and removal from the horizontal hollow cylinder 41.
FIG. 7 shows an alternative hori.zontally-operated dispensing pump adapted for use in a washroom in which multi.ple conduits lead from a single reservoir of soap lotion mounted above the level of the pump. In this alter-native embodiment, a ball-check valve is used in the plunger, as hereinafter described. A pump body, generally designated 120, is barrel-shaped and has an inlet end 121 having internal threads: l22 whi.ch may b.e engaged to piping c, shown in phantom lines, which leads from a remote res.ervoir at a higher eleva-tion. Immediately forward of the threaded i:nlet end 121 i.s. provi.ded an end 9~
wall 123 having a concentric inlet aperture 124, as in the preferred embodi-ment described above. Forward of the end wall 123, the pump body 120 has a piston-receiving cylinder portion 125 extending to an internal shoulder 126 and having an increased radius forward end portion 127, like that of the above-described preferred embodiment.
Again, a hollow plunger 130 is slidably fitted within the aft cylinder portion 125. Like the plunger 50 of the preferred embodiment, the plunger 130 has a piston end portion 131 having an annular groove 132 bearing an 0-ring 133. Forward of the piston end portion 131 is a reducing shoulder 134 leading to a reduced diameter slide portion 135, which similarly has a molded key l36 on its lower side. The plunger 130 has at its forward end an enlarged pump handle 138. Inwardly, the plunger 130 has an inner passage 139 extending rearward from a vertical discharge passage 140 within the pump handle 138 to a first internal shoulder 141 inside the slide portion 135 and thence to a second internal shoulder 142 within the piston end portion 131j at both shoulders 141, 142 the interior diameter of the passage 14G i:s successive-ly enlarged. Aft of the second shoulder l42, the plunger inner passage 139 is referred to as the enlarged diameter portion 143.
The alternative embodiment utilizes split bushings 71, 73 identical - 20 to the bushings described in the above preferred embodiment. Likewise the pump inlet valve 80, shown in FIGS. 4 and 5, is identical and is similarly placed adjacent the end wall 123 with a surrounding washer 9Q and an identical tapered compression spring 95.
The ball-check type plunger valve, generally designated 150, utilizes a small, easily-deflected compression spring 151 extending aft from the first shoulder 141 to a sealing ball 152 which is fitted within the inner passage 139 just forward of the second shnulder 142 and held in place by a removable hollow valve seat 153 which fits within the plunger enlarged diameter portion 143 against the second shoulder 142. The advantages of using a ball-check valve at the outlet of a pump system having a rubber lip inlet valve will be discussed hereafter.
FIG. 8 shows a second alternative embodiment of the present inven-tion, for use with a conventional bottom feeding reservoir or supply tank, designated d and shown in phantom lines. The tank d has a pair of spaced-apart flanged outlets e on its lower side, each outwardly tapered as it extends downward. This alternative embodiment has a cylindrical dispenser body, generally designated 160, which is identical to the pump body 120 of the first alternative embodiment forward of its end wall 123, except that it utilizes the alternative mounting washer of FIG. 6.
Aft of the end wall 123, the body 120 is notably differenti it continues rearward to a cylindrical mounting portion 161 which has a pair of tapered nipples 162 on its upper side which are so sized, tapered and spaced apart as to engage the upwardly tapered outlets e in the supply tank d. Each nipple 162 has a threaded central vertical bore 163 leading downward to a conduit passage 164 within the cylindrical mounting portion 161 which leads forward to the concentric inlet aperture 124 in the end wall 123.
For each tapered nipple there is provided within the tank d a tubu-lar stud, generally designated l65, having a threaded shank l66 to screw into the nipple central vertical bore 163 and having a hexagonal top l67. An inner bore 168 extends downward the entire length of the stud 165.
Manufacture of the present i:nvention is by conventional methods. As will be apparent to persons skilled in molding of plastics., molds for the dispenser body 10 are preferably made up of several sections,-so that portions aft of the pump cylinder portion 40, which vary among the several embodiments, may be provided by changing the mold sections for these portions.
In use of the preferred embodiment first descrihed above, assembly, as well as disassembly, is very easily performed. The dispenser hody 10 is screw-mounted to a wall by the mounting bracket 13. The dip tube:30 is screwed by its threaded fitting 31 into the internally threaded-inner inlet portion 23 of the reservoir support portion 20 and the plastic bottle a, containing liquid soap for dispensing, is then screwed by its threaded upper inlet h into the flange 21. Before installing the plunger, the pump inlet valYe 80 is put into place with its outlet lips 83 forward and its flange tapered compression sur-face against the pump cylinder end wall 46, and with the washer 90 about its body portion 81. The compression spring 95 is placed within the cylinder 41 with its large diameter end 96 against the washer 90. The plunger 50 is readied for installation by installing the 0-ring 53 in the annular groove 52, placing the bushing halves 71, 73 about its sli.de portion 55, and placing the . plunger valve 100 within the enlarged diameter portion 62 of its inner passage 59 against the shoulder 61. Then the plunger 50 is pushed into the hollow cylinder 41 against the resistance of the compression spring 95, the hushing halves 71, 73 are pressed into the forward end portion 42 against the reducing shoulder 44 of the hollow cyli.nder 41 and the set-s.crews 43 are tightened i.nto the hollows 76 in the lower bushing half 73, concluding the assembly. Thus, the pump inlet valve 80 and plunger valve 100 are held in place on opposite ends of the spring 95.
t In use, the pump handle 58 is pressed to push the plunger aft, driv-ing air out through the plunger valve 100 while the inlet valve 80 remains sealed. When the handle 58 is released, liquid is pulled up through the dip tube 30 and the pump inlet valve 80 to fill the void left by the air driven out, while the forward projecting lips of the plunger valve remain sealed. If the plunger 50 is then pushed aft, the plunger valve 100 opens, while the pump inlet valve 80 remains closed, forcing the liquid out through the inner passage Z0 59 and down through the vertical discharge passage 60. When the plunger 50 is then released, liquid will again be drawn up to fill the cylinder 41. The lips of the valves 80, 100 seal s.o tightly agains.t the inflow of air that heavy liquid soaps may be lifted from a newly supplied bottle a without priming with water, as may be required when other valves are used.
. Numerous advantages are obtained by this constructi:on. Primarily, by the unique placement of the pump i.nlet valve 80 forward of the end wall 46, .
and utilization of the compression spring 95 to hold both the~pump i.nlet valve 80 as well as the plunger valve 100 i.n place during use, both ass.embly and dis.-assembly for cleaning, inspection, and repair is. simplifi.ed; all w.orking parts are then accessible. The bushi.ng halves 71, 73 held together by pins 74 and maintained.in place within the hollow cylinder 41 by the:set-screws.43 uniquely permit removal of the plunger 50. Likewise, the integral construction of the mounting bracket portion 11, the reservoir support portion 20 and the pump cylinder portion 40 along with the feature of the concentric inlet aperture 47 and vertical bore 48 leading to the inner inlet portion 23 which receives the dip tube 30 again makes disassembly and reassemb.ly easy.
The alternative mounting washer 110, shown in the enlarged FIG. 6, is advantageously pre-mounted to the i.nlet valve 80. Its outer annular spring-receiving groove 112 mounts the washer and valve within the final loop of the compression spring large diameter end ~6. This facilitates insertion into and removal of the valve from the horizontally mounted pump cylinder.
In the alternative dispenser for use w;th a remote s.upply shown in FIG. 7, a conventional ball-type check valve 150 is used as the plunger dis-charge valve. The use of this valve permits placement of the remote supply at a level substantially above the dispenser, even in a janitorial storage room several floors above the dispenser. In such use, molded rubber valves may leak due to the increased pressure.exerted, but any leakage pas:t the valve 80 will be stopped by the ball-check valve 150. Such a double-valved dispenser, when . used in a gravity-feed type system, as in washrooms having a plurality of dis-pensing outlets, dispenses a measured quantity of liquid. To serve this pur-; pose, the embodiment of FIG. 7 may advantageously be substituted for conven-tional non-measuring discharge valves.
The alternative dispenser for use with the bottom feeding supply tank, : fragmentarily shown in FIG. 8, again operates substantially like the two ahove-described embodiments, but is specially adapted to fit in such a conventi.onal supply tank, sometimes used to supply granular soap in factory washrooms. The integrally molded nipples 162 serve both. to mount the dispenser to the under-side of the tank d rigidly, without possibility of any angular movement, and to communicate the liquid soap therefrom.
Modifications of the various: embDdi.ments described above will he ap-parent to persons skilled in the art. For example, with mi.nor modifications, the embodiment of FIG. 1 may be used inverted, with a res.ervoi.r.ahove instead .
of the bottle a.and without the di.p:tuhe. The mi:nor modificàti.ons for ~uch us.e include omitting the air inlet 25 and suitably installing the.hushing _g_ 11~9~36 halves 71 and 72, and the plunger 50, s.o that the discharge passage 60 in the handle 58 is nevertheless presented downward. From these examples, other forms of the present invention will suggest themselves.
, :
Claims
1. A pump-type dispenser comprising an integrally molded body including an aft mounting portion, a vertical cylindrical reservoir support portion having a downward extending cylindrical flange forwardly of said mounting portion, and a substantially horizontal pump cylinder portion positioned entirely forward of the cylinder axis of said reservoir support portion, the pump cylinder portion having a connecting bore extending aft therefrom, said reservoir support portion being positioned downward from the level of the pump cylinder portion, whereby to leave a wall portion at an intermediate level therebetween, said wall portion having a central downward projection bounded by an outer wall spaced inwardly of said cylin-drical flange, whereby to leave an annular space therebetween, the projection having an internally threaded bore concentric with said flange, whereby to provide central support for a reservoir dip tube, an air vent passage through said flange into said annular space, internal threads on said flange below the air vent passage, whereby to support a reservoir vessel along said cylinder axis, and a central conduit bore extending vertically upward along such axis of said reservoir flange from the threaded bore of said central downward projection to said connecting bore, whereby to provide communication upwardly to said pump cylinder portion, together with a dip tube having an upper end threaded for mounting in said threaded bore, a hollow discharge plunger having a piston end reciprocable in said pump cylinder portion, and valve and spring means to operate said plunger therein in the manner of the pump.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US97380678A | 1978-12-28 | 1978-12-28 | |
| US973,806 | 1978-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1109436A true CA1109436A (en) | 1981-09-22 |
Family
ID=25521249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA333,742A Expired CA1109436A (en) | 1978-12-28 | 1979-08-14 | Horizontally-operated integrally-molded pump-type dispenser having improved valve access |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1109436A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4964544A (en) * | 1988-08-16 | 1990-10-23 | Bobrick Washroom Equipment, Inc. | Push up dispenser with capsule valve |
-
1979
- 1979-08-14 CA CA333,742A patent/CA1109436A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4964544A (en) * | 1988-08-16 | 1990-10-23 | Bobrick Washroom Equipment, Inc. | Push up dispenser with capsule valve |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 19980922 |