Trigger sprayer venting system with reduced drag on vent piston

Details Trigger sprayer venting system with reduced drag on vent piston Trigger sprayer venting system with reduced drag on vent piston

2007-12-25

2007-12-25

Kaufman, Joseph A. (Department: 3754)

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

C222S481500, C239S333000

Reexamination Certificate

active

11176050

ABSTRACT:
A venting system of a manually operated trigger sprayer vents the interior of a liquid container connected to the trigger sprayer. The trigger sprayer is provided with a vent chamber that surrounds the pump chamber, and a vent piston that surrounds the pump piston. The vent piston is received in the vent chamber for reciprocating movements between a vent closed and vent opened position in the vent chamber, and the vent chamber having two different interior diameter sections with a larger interior diameter section reducing drag on the vent piston when the vent piston is moved to the vent opened position.

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