US PATENT SUBCLASS 60 / 474
.~.~ Valve or restriction controls gravity or spring return of output

Current as of: June, 1999
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60 /   HD   POWER PLANTS

325  DF  PRESSURE FLUID SOURCE AND MOTOR {47}
473  DF  .~ Pump means moves motive fluid from one chamber to an opposite chamber of opposed expansible chambers having a common output {3}
474.~.~ Valve or restriction controls gravity or spring return of output

DEFINITION

Classification: 60/474

(under subclass 437) Apparatus in which the pump moves the piston in one direction only, its return being produced by gravity or stored energy and controlled by a valve or restriction means adjusting the rate of flow of motive fluid between the chambers.

SEE OR SEARCH THIS CLASS, SUBCLASS:

461, for a double acting motor having a condition responsive valve controlling the discharge from the exhausting expansible chamber.