US PATENT SUBCLASS 91 / 207
.~.~ Both faces urged in single direction

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

196  DF  MOVING CYLINDER {4}
206  DF  .~ With integral exterior working face {1}
207.~.~ Both faces urged in single direction {2}
208  DF  .~.~.~> Fluid to exterior face controlled by motive fluid pressure
209  DF  .~.~.~> Fluid to exterior face controlled by cylinder position

DEFINITION

Classification: 91/207

(under subclass 206) Apparatus in which the first and second working faces are so disposed on the cylinder that when motive fluid is applied thereto both surfaces urge the cylinder in the same direction.