Automatic air deflation regulator for use in an instrument for measuring blood pressure
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United States of America Patent
Stats
-
Apr 15, 1980
Grant Date -
N/A
app pub date -
Apr 17, 1978
filing date -
Apr 17, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic air deflation valve is provided for use with a sphygmomanometer type blood pressure measuring instrument. The valve comprises a housing having an air flow channel extending through the longitudinal extent thereof and at least one air deflation port extending outwardly from said channel. The port includes a deformable diaphragm supported only on its outer edges and having a central aperture extending through the thickness thereof. The diaphragm is adapted to deform in accordance with the air pressure applied against it from said channel to automatically adjust the size and shape of said aperture, thus producing a constant air deflation rate therethrough.
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