US PATENT SUBCLASS 137 / 58
.~.~ With fluid servo-motor


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

47  DF  SPEED RESPONSIVE VALVE CONTROL {5}
53  DF  .~ Centrifugal mass type (exclusive of liquid) {5}
58.~.~ With fluid servo-motor


DEFINITION

Classification: 137/58

(under subclass 53) Control systems wherein the speed responsive means transmits its regulating motion to the valve or valves by means of a fluid type servo-motor mechanism.

SEE OR SEARCH CLASS

91, Motors: Expansible Chamber Type,

366, and 458 for speed governor operated expansible chamber motors.

251, Valves and Valve Actuation,

25+, for fluid pressure actuated valves of the pilot or servo-motor type, and see the search notes to subclass 25. 418, Rotary Expansible Chamber Devices,

40+, for speed controlled rotary expansible chamber devices.