Liquid dispensing pump having water seal

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

B - Operations, Transporting

65

D

B65D 47/34 (2006.01) B05B 11/00 (2006.01) F04B 33/00 (2006.01)

Patent

CA 2229950

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.

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