US PATENT SUBCLASS 91 / 401
.~.~ Through working member

Current as of: June, 1999
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91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

392  DF  WORKING MEMBER POSITION RESPONSIVE MOTIVE FLUID CONTROL {9}
400  DF  .~ Venting expanding chamber {2}
401.~.~ Through working member

DEFINITION

Classification: 91/401

(under subclass 400) Apparatus in which the motive fluid is vented through a passage in the working member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

49, for expansible chamber motors in which motive fluid is constantly applied to a working chamber thereof, motor movement being controlled by operating a vent valve for said working chamber, the vented fluid passing through a passage in the working member of the motor.