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Vacuum relief device

US-7377405-B2

Abstract

Liquid soap dispensers including a vacuum relief valve which comprises an enclosed chamber having an air inlet open to the atmosphere and a liquid inlet in communication with liquid in the reservoir and in which the liquid inlet opens to the chamber at a height below a height at which the air inlet opens to the chamber. The vacuum relief valve permits relief of vacuum from the reservoir without moving parts or valves.

Patent figures（8）

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Source status & events

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