US PATENT SUBCLASS 251 / 231
.~ Lever

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

213  DF  MECHANICAL MOVEMENT ACTUATOR {10}
231.~ Lever {5}
232  DF  .~.~> Train (plural serial)
233  DF  .~.~> Leverage variable during operation
234  DF  .~.~> Adjustable leverage
235  DF  .~.~> Swiveled
236  DF  .~.~> Biased {3}

DEFINITION

Classification: 251/231

(under subclass 213) Subject matter wherein the mechanical movement actuator includes an elongated rigid means pivoted at one point to a support and having the actuating power and the valve connection at two other points.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism, appropriate subclasses, for mechanical movement actuators including a lever.

137, Fluid Handling,

434+, for float arm operated valves, especially subclass 445 for float arm operated valves having a toggle or second lever connected to the valve.