Liquid dispensing pump having water seal

Details Liquid dispensing pump having water seal Liquid dispensing pump having water seal

1997-04-07

1998-04-14

Bomberg, Kenneth

Dispensing

With lock or fastening seal

Inhibiting actuation of discharge assistant

2223219, B67D 542

Patent

active

057382506

ABSTRACT:
A manually actuated pump dispenser has a water seal for maintaining the container vent ports sealed closed during pumping until at or near the end of the pressure stroke whereupon a vent path through which only air is permitted travel into the container, is open as the path is shielded against water entering the vent path when pumping in a wet environment as when dispensing hair shampoo or hair conditioner. In a plunger lock-down position of shipping and storage, leakage of product through the vent ports is substantially avoided during a superatmospheric condition within the container.

REFERENCES:
patent: 3062416 (1962-11-01), Cooprider
patent: 3179306 (1965-04-01), Corsette
patent: 3282472 (1966-11-01), Roder
patent: 3391647 (1968-07-01), Corsette et al.
patent: 4344744 (1982-08-01), Schuster et al.
patent: 4728008 (1988-03-01), Graf et al.
patent: 5401148 (1995-03-01), Foster et al.

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