Pressure venting trigger sprayer

Details Pressure venting trigger sprayer Pressure venting trigger sprayer

1995-06-15

1998-07-14

Shaver, Kevin P.

Dispensing

With discharge assistant

With biasing means for discharge assistant and/or its casing

2223831, 222397, B67D 540

Patent

active

057791082

ABSTRACT:
A trigger actuated pump dispenser includes a housing mounted on a container of gas/vapor producing liquid product capable of generating a superatmospheric pressure in the container, the housing including a piston/cylinder unit and a container air vent which includes a vent chamber and a vent port establishing communication between the vent chamber and the interior of the container. The air vent has a pressure vent outboard of the vent seal connected to the piston for releasing pressure from the container via the vent port and the vent chamber upon outboard movement of the piston to such outboard location in response to the superatmospheric pressure in the container.

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