Vent plug for self-contained viscous liquid dispenser

Dispensing – With casing or support – Bracket or suspension supported

Reexamination Certificate

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Details

C222S380000, C222S481500

Reexamination Certificate

active

07114639

ABSTRACT:
A self-contained viscous liquid dispenser having an improved vent valve is provided. The vent valve includes a plug member having a sealing ridge at its perimeter. The vent valve is activated at reduced pressure differentials between the inside and outside of the dispenser. The vent valve also provides redundant sealing capability.

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