US PATENT SUBCLASS 73 / 1.71
.~.~ Pressure activated device

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.57  DF  .~ Fluid pressure {7}
1.71.~.~ Pressure activated device {1}
1.72  DF  .~.~.~> Valve

DEFINITION

Classification: 73/1.71

Pressure activated device:

(under subclass 1.57) Subject matter wherein the pressure responsive device which is being proven or calibrated performs a nonpressure function in response to pressure.