US PATENT SUBCLASS 251 / 74
.~ Mechanical movement trip actuation

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

66  DF  BIASED TRIP {5}
74.~ Mechanical movement trip actuation

DEFINITION

Classification: 251/74

(under subclass 66) Subject matter wherein the trip actuator includes a mechanical movement.

(1) Note. For a definition of a mechanical movement actuator, see subclass 213.

SEE OR SEARCH THIS CLASS, SUBCLASS:

213+, for mechanical movement actuated valves, and see the search notes thereto.

SEE OR SEARCH CLASS

137, Fluid Handling, 420+, for trip-mechanism for quick acting float controlled valves.