US PATENT SUBCLASS 137 / 53
.~ Centrifugal mass type (exclusive of liquid)

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

47  DF  SPEED RESPONSIVE VALVE CONTROL {5}
53.~ Centrifugal mass type (exclusive of liquid) {5}
54  DF  .~.~> With multiple valves
55  DF  .~.~> Periodically actuated valve
56  DF  .~.~> Rotating valve and rotating governor
57  DF  .~.~> Excess speed responsive
58  DF  .~.~> With fluid servo-motor

DEFINITION

Classification: 137/53

(under subclass 47) Control systems wherein the speed responsive means comprises a rotating or revolving weight or weights, the position assumed by such weight or weights due to centrifugal force varying as a function of the speed at which they are rotated or revolved.

SEE OR SEARCH CLASS

73, Measuring and Testing,

535+, for a centrifugal type speed responsive device, per se.