Dispensing pump with positive shut-off

Details Dispensing pump with positive shut-off Dispensing pump with positive shut-off

1993-06-03

1995-04-25

Huson, Gregory L.

Dispensing

With discharge assistant

With movable nozzle interconnected therewith

222384, 222375, 417566, 137843, B65D 8854

Patent

active

054091462

ABSTRACT:
A container-mounted dispensing pump incorporates elastomeric duckbill valves for controlling the flow into and from the pump chamber. A mechanism within the pump employs hinged leaves which cooperate with the pump plunger to effect a pinching and closing one of the duckbill valves when the plunger is disposed in a depressed, shipping position. With the pump plunger held in the shipping position, the closed duckbill valve will preclude leakage of the container contents through the pump.

REFERENCES:
patent: 3406909 (1968-10-01), Pfeiffer
patent: 3527551 (1970-09-01), Kutik et al.
patent: 3966095 (1976-06-01), Chappell
patent: 4410107 (1983-10-01), Corsette

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