US PATENT SUBCLASS 475 / 140
.~.~ Spring engaged, fluid released clutch or brake device

Current as of: June, 1999
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475 /   HD   PLANETARY GEAR TRANSMISSION SYSTEMS OR COMPONENTS

31  DF  FLUID DRIVE OR CONTROL OF PLANETARY GEARING {11}
116  DF  .~ Fluid controlled mechanical clutch or brake {12}
140.~.~ Spring engaged, fluid released clutch or brake device {2}
141  DF  .~.~.~> Plural devices simultaneously spring engaged
142  DF  .~.~.~> Single fluid motor engages one device and releases other

DEFINITION

Classification: 475/140

Spring engaged, fluid released clutch or brake device:

(under subclass 116) Subject matter wherein two parts of the clutch* or brake* are separated by fluid pressure against the resistance of a spring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

144, for one-way devices that may be placed in inoperative

position by means of fluid pressure and operative position by means of a spring. [figure]