US PATENT SUBCLASS 137 / 46
.~.~ With servo connection to valve

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

38  DF  CONTROL BY CHANGE OF POSITION OR INERTIA OF SYSTEM {5}
45  DF  .~ By pendulum or swinging member {1}
46.~.~ With servo connection to valve

DEFINITION

Classification: 137/46

(under subclass 45) Apparatus in which the pendulum or pivoted member controls the application of another source of power for operating the control instead of by acting directly through a mechanical connection.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

25+, for fluid servo or pilot operated valves, and see the search notes to subclass 25.