US PATENT SUBCLASS 91 / 18
.~.~ Pressure control of drifting fluid


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

6  DF  FLUID SUPPLY THROUGH DIVERSE PATHS TO SINGLE EXPANSIBLE CHAMBER {12}
16  DF  .~ Drifting or coasting on lower pressure {2}
18.~.~ Pressure control of drifting fluid


DEFINITION

Classification: 91/18

(under subclass 16) Apparatus in which the lower pressure fluid is controlled by the pressure condition in the higher pressure line or in a motor working chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

28+, for expansible chamber motors in which motive fluid is supplied to a working chamber through different flow paths, the flow in the second path being activated by a pressure or flow condition in the first path.

33, for expansible chamber motors in which motive fluid is supplied to a working chamber through different flow paths, the activation of one path acting to disable a second flow path by the pressure of fluid acting in said one path as, for example, by a shuttle valve.