Dispensing pump with automatic shut-off and method of manufactur

Details Dispensing pump with automatic shut-off and method of manufactur Dispensing pump with automatic shut-off and method of manufactur

1999-05-10

2000-11-21

Shaver, Kevin

Dispensing

With discharge assistant

With movable nozzle interconnected therewith

222380, 222385, G01F 1130

Patent

active

061490369

ABSTRACT:
A dispensing pump coupled with a container has a pump body having an end coupled with a button cap. The button cap has a spray nozzle and a pump chamber that contains fluid to be dispensed through the spray nozzle. Inside the pump body is a plunger, a stationary tube with fingers, a biasing member, and a duckbill valve with a slit. When the plunger is in an extended position, the fingers act against the plunger to close the slit of the duckbill valve. As the button cap is depressed, the plunger translates to a depressed position thereby allowing the fingers to spread apart from the duckbill valve and open up the slit such that fluid from the container can fill up the pump chamber. The biasing member urges the plunger back to the extended position, thereby urging the opposed fingers to return to the closed position.

REFERENCES:
patent: 2772116 (1956-11-01), Dobkin
patent: 3779669 (1973-12-01), Sommer
patent: 4155489 (1979-05-01), Steiman
patent: 4214682 (1980-07-01), Thomas, Jr.
patent: 5409146 (1995-04-01), Hazard et al.
patent: 5464129 (1995-11-01), Ho
patent: 5765605 (1998-06-01), Waymire et al.
patent: 5829640 (1998-11-01), Hershey et al.
patent: 5839474 (1998-11-01), Greaney
patent: 5862948 (1999-01-01), Duchon et al.

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