US PATENT SUBCLASS 251 / 262
.~.~ Biased

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

213  DF  MECHANICAL MOVEMENT ACTUATOR {10}
251  DF  .~ Cam {3}
262.~.~ Biased {1}
263  DF  .~.~.~> Spring

DEFINITION

Classification: 251/262

(under subclass 251) Devices in which the valve has one position which it will maintain under the influence of a spring or weight which comprises a biasing means.