Leak-resistant hand-pump spray bottle

Details Leak-resistant hand-pump spray bottle Leak-resistant hand-pump spray bottle

1997-10-14

1999-05-04

Derakshani, Philippe

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

222377, 222382, B67D 540

Patent

active

058993665

ABSTRACT:
A hand pump spray bottle does not leak the liquid contents through the air inlet port during operation when the bottle is oriented so that the inlet port is covered with liquid. The air inlet port is in circuit with an optional void volume which in turn is in fluid communication with the interior of the bottle through a tubular section. The void volume, where present, and the tubular section act as a reservoir to store the liquid from the bottle that would normally reach the air inlet port. When the hand pump is operated, liquid is removed from the bottle and the pressure therein decreases. When the pressure within the bottle decreases to a value that is equal to the atmospheric pressure minus the product of the density of the liquid contents times the height of the liquid above the air inlet port, atmospheric air will force the liquid in the void volume, where present, and the tubular section back into the bottle and atmospheric air then can enter the bottle to maintain the pressure substantially constant thereafter.

REFERENCES:
patent: 5467901 (1995-11-01), Foster et al.
patent: 5624060 (1997-04-01), Ellion et al.
patent: 5657909 (1997-08-01), Barriac

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