Double action trigger sprayer

Dispensing – With discharge assistant – With bypass or return to supply

Patent

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Details

2223831, 239333, B67D 540

Patent

active

057114595

ABSTRACT:
The present invention is a continuous action trigger sprayer for spraying liquid material. It includes a main housing having connectors to a container and having an operation cylinder and a liquid chamber. It also includes a pumping element which is within the operation cylinder and has a valve seat, a one-way valve and a pumping rod, which permits liquid material to pass therethrough in a relative direction toward a spray nozzle, but not toward the liquid chamber. There is a relief valve having a seat with an opening therethrough and a relief passage to bleed liquid back to the container and which cooperates with the pumping element. There is also a trigger which moves the pumping element.

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patent: 5622287 (1997-04-01), Glynn

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