US PATENT SUBCLASS 251 / 42
.~.~.~ Adjustable opening limit for main valve

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

12  DF  FLUID ACTUATED OR RETARDED {12}
25  DF  .~ Pilot or servo type motor {8}
33  DF  .~.~ Choked pressure type servo motor {8}
42.~.~.~ Adjustable opening limit for main valve

DEFINITION

Classification: 251/42

(under subclass 33) Subject matter in which means are provided for selectively setting the maximum opening of the main valve.

(1) Note. The opening limit may be imposed by the mechanical blocking of the opening movement of the main valve or by some control exercised on the pilot valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

60, for adjustable limit stops for fluid pressure operated valves not of the servo type.

284+, for limit stops for valves of general types, and see the search notes thereto.