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US 4,515,294 AGranted
Liquid dispenser, valve therefor and process of producing the valve
AssigneeSouthern Chemical Products Company
InventorRaymond E. Udall
Life of this patent
Estimating the term…
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AssigneeSouthern Chemical Products Company
InventorRaymond E. Udall
Estimating the term…
A main housing assembly has a back plate and a front casing which is hingedly secured to the back plate. A bracket on the backplate supports a liquid reservoir which includes a flexible bag carried by a fiber board box, the bag having a discharge tube clamped at one corner of the bag. A discharge nozzle assembly is connected by one end to the discharge tube, the discharge nozzle assembly having a pair of ball check valves carried by the ends of a flexible tube. The lower ball check valve protrudes from the bottom of the housing when the liquid reservoir is mounted on the bracket and the nozzle assembly protrudes downwardly therefrom in front of the bracket. A depressible plunger carried by the casing is adapted to squeeze the flexible tube of the nozzle assembly so as to close the upper ball check valve and open the lower ball check valve permitting a metered amount of liquid to be discharged through the lower ball check valve. The method of forming the liquid reservoir includes enclosing the bag in the fiber board housing and then inverting the liquid reservoir assembly so as to insert the liquid through the discharge tube which protrudes through the housing. A cap is then placed on the end of the discharge nozzle so that the liquid reservoir assembly can be shipped.
A cartridge assembly for use within a liquid dispenser comprising:
A cartridge assembly for use with a liquid dispenser, said cartridge assembly being of the type having a fiberboard housing and a flexible bag containing liquid disposed within said housing wherein the improvement comprises:
A liquid dispenser comprising a main housing assembly having a back plate and a front casing defining a hollow interior, a bracket mounted on said back plate and extending forwardly therefrom within said front casing said bracket having an upper surface and a front surface, said front surface being spaced from a front portion of said front casing, a liquid reservoir having liquid therein, carried by the upper surface of said bracket, a discharge tube communicating with the liquid in said reservoir, the outer end of said discharge tube being provided with external threads, a nozzle assembly having a cap at one end, said cap being threadedly secured to the threaded end of said discharge tube, said discharge nozzle being disposed between said front surface of said bracket and the front portion of said front casing, said discharge nozzle having a resilient, flexible dispensing tube and a pair of ball check valves at the ends of said dispensing tube, the upper ball check valve being normally open and the lower ball check valve being normally closed, and a plunger moveably carried by said front casing, said plunger being positioned in front of said dispensing tube of said nozzle when said front casing is closed against said back plate, said plunger being moveable to squeeze said body for urging the liquid in said body toward both ends thereof for closing the upper ball check valve and opening the lower ball check valve to permit discharge of the liquid through the lower ball check valve and out of the end of the discharge nozzle, said dispensing tube being sufficiently resilient that, when the plunger is released, the dispensing tube will assume its original contour, thereby drawing in additional liquid via the upper ball check valve from said bag.
Dependencies are inferred from the claim text.