Leak-resistant manually operated pump sprayer

Details Leak-resistant manually operated pump sprayer Leak-resistant manually operated pump sprayer

1999-04-02

1999-11-23

Derakshani, Philippe

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

222377, 222382, B67D 540

Patent

active

059884541

ABSTRACT:
A manually operated pump sprayer that does not leak contents through the air inlet vent port during operation when the bottle is oriented so that the inlet vent port would be covered with liquid in a spray bottle to which the sprayer is mounted. The pump sprayer is devised as having an air inlet unit which includes the air inlet vent port in liquid communication with an extension tube which in turn is in liquid communication with a storage volume which in turn is in liquid communication with a liquid control orifice. An entrance end to the tube is positioned at a location farthest from the discharge exit opening of the sprayer, and the liquid control orifice is positioned closer to the exit opening such that when spraying in a downward direction such entrance end is always above the liquid level in the storage volume. Otherwise the entrance end is arranged as to be closer to the exit opening compared to the liquid control orifice such that when spraying in an upward direction the entrance end is above the liquid level in the storage volume.

REFERENCES:
patent: 3733013 (1973-05-01), Doyle
patent: 4072252 (1978-02-01), Steyns et al.
patent: 4775070 (1988-10-01), Williams
patent: 5353969 (1994-10-01), Balderrama
patent: 5624060 (1997-04-01), Ellion et al.
patent: 5779108 (1998-07-01), Barriac et al.
patent: 5899366 (1999-05-01), Ellion

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