Automatic air deflation regulator for use in an instrument for m

Details Automatic air deflation regulator for use in an instrument for m Automatic air deflation regulator for use in an instrument for m

1978-04-17

1980-04-15

Rosenthal, Arnold

Valves and valve actuation

With restrictor in parallel to main valve

137844, 138 45, 128685, F16K 2400

Patent

active

041980310

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.

REFERENCES:
patent: 2389134 (1945-11-01), Brown
patent: 2629393 (1953-02-01), Langdon
patent: 2941544 (1960-06-01), Peras
patent: 3077903 (1963-02-01), Honsinger
patent: 3187947 (1965-06-01), Ellis
patent: 3504663 (1970-04-01), Edwards
patent: 4072171 (1978-02-01), Nakazawa

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