Hand operated sprayer with automatic container vent

Details Hand operated sprayer with automatic container vent Hand operated sprayer with automatic container vent

1976-06-07

1978-02-07

Tollberg, Stanley H.

Dispensing

With discharge assistant

With biasing means for discharge assistant and/or its casing

B67D 540

Patent

active

040722520

ABSTRACT:
The problem of venting the interior of a liquid container utilizing an attached hand-operated, trigger sprayer of the piston or plunger pump type is solved by the provision of a vent passage in the housing of the pump which communicates with the container interior. The piston which is reciprocated in a bore or chamber in the housing has a seal means associated therewith and with the vent passage so that in operation in spraying the container is vented and vacuum development in the container is avoided. In a preferred embodiment said seal means is associated with an entrance or opening to the vent passage so as to provide a seal against liquid leakage from the container when the piston of the pump is in an at rest, non-pumping position and yet permits venting of the container when the piston is in a pumping position.

REFERENCES:
patent: 2128494 (1938-08-01), Morrow
patent: 2753079 (1956-07-01), Hersey
patent: 3321111 (1967-05-01), Jellinek
patent: 3608788 (1971-09-01), Tanaka

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