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One-way umbrella valve and portable fluid pumping device including same
One-way umbrella valve and portable fluid pumping device including same
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机译:单向伞阀和包括该单向伞阀的便携式流体泵送装置
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摘要
A portable fluid pumping device includes a valve assembly having a pair of one-way umbrella valves controlling the flow of air to produce a positive pressure at one port and a negative pressure at another port. Each umbrella valve includes a valve stem having a neck received within the mounting opening, and an umbrella skirt integrally joined to the neck to overlie the valve opening. The umbrerlla skirt is relatively thin for its complete extent, and the juncture between the umbrella skirt and neck of the valve stem is of frusto-conical configuration increasing in diameter from the neck to the umbrella skirt.
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