US PATENT SUBCLASS 340 / 591
.~.~.~.~ Containing pressurized fluid

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
584  DF  .~.~ Thermal {8}
590  DF  .~.~.~ Fusible, frangible, or destructible sensor {1}
591.~.~.~.~ Containing pressurized fluid

DEFINITION

Classification: 340/591

Containing pressurized fluid:

(under subclass 590) Subject matter wherein the sensor contains fluid under a pressure higher than that of the ambient so as to produce a pressure drop upon destruction of the sensor element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

626, for a pressure responsive indicator, per se.

SEE OR SEARCH CLASS

169, Fire Extinguishers,

56+, having various fusible and frangible condition responsive controls.

239, Fluid Sprinkling, Spraying, and Diffusing, 71, for sprinkling systems with indicators.