Title: Automatic air deflation regulator for use in an instrument for measuring blood pressure

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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Inventors: Ezekiel, Frederick D. (Lexington, MA, US)
Aisenberg, Sol (Natick, MA, US)

Application Number: 896968
Filing Date: 1978-04-17
Publication_date: 1980-04-15
Assignee: Gulf & Western Industries, Inc. (New York, NY)
Primary Class(es): 251/117 137/844, 138/45, 600/498
Other Classes:
US Patent Ref:

2389134	Nov, 1945	Brown	138/45.
2629393	Feb, 1953	Langdon	137/844.
2941544	Jun, 1960	Peras	138/45.
3077903	Feb, 1963	Honsinger	138/45.
3187947	Jun, 1965	Ellis	138/45.
3504663	Apr, 1970	Edwards	128/2.
4072171	Feb, 1978	Nakazawa	128/2.

Other Refs: 393956

Nov, 1965	CH

Primary Examiner: Rosenthal, Arnold
Assistant Examiner:
Attorney: Battersby; Gregory J., Merklen; Kenneth E., Harrison, Jr.; Thomas E.