US PATENT SUBCLASS 91 / 486
.~ Motive fluid bypass to or from assembly

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

472  DF  THREE OR MORE CYLINDERS ARRANGED IN PARALLEL RADIAL OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS {10}
486.~ Motive fluid bypass to or from assembly {3}
487  DF  .~.~> Separate passage directs motive fluid to or from valve interface
488  DF  .~.~> Fluid conducting passage disposed within piston
489  DF  .~.~> Valved

DEFINITION

Classification: 91/486

(under subclass 472) Apparatus including means to conduct a portion of the motive fluid to or from a part of the motor assembly to assist said part in performing its intended function (e.g., lubricating, sealing, thrust balancing).

SEE OR SEARCH THIS CLASS, SUBCLASS:

484, for means for exerting a fluid pressure bias on the motor distributing valve, in many cases the fluid pressure so utilized being motive fluid.