Apparatus for automatically depressurizing a variable-volume inf

Details Apparatus for automatically depressurizing a variable-volume inf Apparatus for automatically depressurizing a variable-volume inf

1977-03-18

1979-09-11

Michell, Robert W.

Surgery

Truss

Pad

137102, A61B 502

Patent

active

041671813

ABSTRACT:
A pneumatic regulator including a constant-volume reference chamber and associated pressure-sensitive inflation and deflation valves is provided to effect a precise linear depressurization of a variable-volume inflatable enclosure, such as a cuff which has been applied to a patient during a blood pressure measurement thereof and pressurized to a value higher than the patient's systolic pressure. By coupling such regulator to the drive for one axis of an X-Y recording chart, the pen or marker of the chart can be precisely scanned along the associated chart axis at the constant depressurization rate of the cuff.

REFERENCES:
patent: 2292302 (1961-07-01), Schuler
patent: 3033195 (1962-05-01), Gilroy et al.
patent: 3104661 (1963-09-01), Halpern
patent: 3485238 (1969-12-01), Kostrov et al.
patent: 3552383 (1971-01-01), Krueger
patent: 3730172 (1973-05-01), Buddecke et al.
patent: 3905353 (1975-09-01), Lichowsky
patent: 4116230 (1978-09-01), Gorelick

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