US PATENT SUBCLASS 73 / 1.17
.~.~ Plug with leak detector

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

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.16  DF  .~ Volume of flow, speed of flow, volume rate of flow, or mass rate of flow {12}
1.17.~.~ Plug with leak detector

DEFINITION

Classification: 73/1.17

Plug with leak detector:

(under subclass 1.16) Subject matter including a movable barrier for the introduction of a known flow volume combined with a means sensing an undesirable escape of a fluent material through an opening wherein the proving or the calibrating is performed by utilizing the movement of the barrier for the introduction of a known flow volume.