US PATENT SUBCLASS 137 / 47
SPEED RESPONSIVE VALVE CONTROL

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

47SPEED RESPONSIVE VALVE CONTROL {5}
48  DF  .~> Acceleration responsive valve control
49  DF  .~> With manual valve control
50  DF  .~> Speed change and excess speed valve control
51  DF  .~> With other condition responsive valve control {1}
53  DF  .~> Centrifugal mass type (exclusive of liquid) {5}

DEFINITION

Classification: 137/47

(under the class definition) Systems including the combination of a valve or valves and an actuator therefor, the actuator including a driven means which changes its position or produces a regulating pressure which varies in accordance with the speed at which it is driven.

(1) Note. The driven means may comprise one or more governors.

SEE OR SEARCH CLASS

73, Measuring and Testing,

488+, for a speed responsive device, per se.

116, Signals and Indicators,

37+, and 57 for vehicle speed responsive indicators and subclasses 200+ for speed limit indicators. 364, Electrical Computers and Data Processing Systems,

528.17+, for flow control including valve or pump control, and subclasses 528.36 and 528.39 for pressure and speed contro, respectively.

399, Electrophotography,

237+, for liquid developer applied to a latent image within an electrophotos:graphic device.