US PATENT SUBCLASS 251 / 237
.~.~.~ Sliding contact

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

213  DF  MECHANICAL MOVEMENT ACTUATOR {10}
231  DF  .~ Lever {5}
236  DF  .~.~ Biased {3}
237.~.~.~ Sliding contact {1}
238  DF  .~.~.~.~> Spring {1}

DEFINITION

Classification: 251/237

(under subclass 236) Valves wherein the three points are in a common plane and there is an unrestrained sliding connection

between the valve and the elongated rigid means; the sliding contact herein affords no appreciable mechanical advantage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

233, for devices having leverage variable during operation.