(under subclass 66) Subject matter wherein the means for actuating the trip includes fluid pressure motive means.
(1) Note. The trip may be actuated either by the application of a predetermined fluid pressure or by the decrease or failure of a fluid pressure.
(2) Note. The pressure fluid may be obtained from fuel oxidized in a chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
12+, for fluid pressure actuated valves.
49, for dashpot type trip release in fluid actuated or retarded valves.
SEE OR SEARCH CLASS 137, Fluid Handling,
386+, and 393 for liquid level responsive devices in which a fluid pressure differential results from a vent closed by accumulated material and subclass 463 for fluid released trip type safety cut-off valves requiring resetting.
141, Fluent Material Handling, With Receiver or Receiver Coacting Means,
198+, for feed cut-off by rising liquid level in a filled receiver.
