Pneumotach
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United States of America Patent
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-
Oct 29, 1991
Grant Date -
N/A
app pub date -
Nov 15, 1988
filing date -
Nov 15, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pneumotach apparatus for measuring gas flows comprises a flow head with a passageway and having a plurality of screens positioned in the pasageway to provide a variance in pressure on different sides of one of the screens, a pressure transducer to convert the pressures into a flow value and a display or recorder for conveying the pressure readings to an operator. The apparatus includes improved seals between the screens, improved seals between pressure taps and the screens, improved sealing between a mounting plate for the taps and a housing for the screens, and knife edges on tube adaptors for the housing that are positioned in close proximity to the screens to improve the accuracy of flow measurements taken by the apparatus.
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