US PATENT SUBCLASS 60 / 477
.~ Ram driven by fluid pumped from reservoir

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

325  DF  PRESSURE FLUID SOURCE AND MOTOR {47}
477.~ Ram driven by fluid pumped from reservoir {4}
478  DF  .~.~> Having means pressurizing, vacuumizing or venting reservoir
479  DF  .~.~> Having selective or variable pump displacement or pump drive leverage
480  DF  .~.~> Telescopic ram
481  DF  .~.~> Having fluid trapping means with a manual release or by-pass holding ram {1}

DEFINITION

Classification: 60/477

(under subclass 325) Apparatus comprising an output motor of the piston-cylinder type, the motor being caused to produce a pull or thrust by pumping motive liquid from a reservoir into or from the cylinder.

SEE OR SEARCH THIS CLASS, SUBCLASS:

369, for a cyclically operated reciprocating ram.

387, for a ram with distinct structure metering and dispensing a stroke length determining volume of motive fluid.

432, for a ram device in which the motor driving the motive fluid pump is deactivated responsive to the position of the ram.

437, for a ram device in which one side of the piston is the reservoir from which motive fluid is pumped to the power cylinder.

462, for a ram having coordinated manual and automatic controls. 467, for a ram cylinder opened to exhaust or reaching the end of its stroke.

470, for a ram controlled by an externally operated multiway valve or interconnected control elements.

SEE OR SEARCH CLASS

254, Implements or Apparatus for Applying Pushing or Pulling Force,

93, for a pushing or pulling implement including a ram driven by fluid pressure.