Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1989-11-06
1991-07-23
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Using differential pressure
128725, G01F 122, G01F 140
Patent
active
050333127
ABSTRACT:
A variable gas flow meter for obtaining a differential pressure across a membrane having a variable area orifice. The orifice is defined by a hinged flap which swings open in the direction of gas flow. The area of the orifice enlarges with increased flow. The flow meter retains the membrane in a central housing configured to prevent the accumulation of liquids, such as moisture or mucus, which enter the line. In a first, horizontal embodiment, the housing invert is continuous and flush throughout except for a negligible ridge of membrane that remains when the orifice opens. In a second, vertical embodiment, the housing allows liquids in an upper conduit section to drop downward and flow out the device into a lower conduit section through the forces of gravity and a gas flow.
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Bicore Monitoring Systems
Goldstein Herbert
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