US PATENT SUBCLASS 417 / 339
.~.~ Nonrotary pumping and fluid motor working members

Current as of: June, 1999
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417 /   HD   PUMPS

321  DF  MOTOR DRIVEN {32}
338  DF  .~ Relatively movable pumping members driven by relatively movable working members {1}
339.~.~ Nonrotary pumping and fluid motor working members {5}
340  DF  .~.~.~> Common expansible chamber for oppositely movable working members {1}
342  DF  .~.~.~> Including closed fluid interconnection between working members
343  DF  .~.~.~> Including mechanical interconnection to cause relative motion
344  DF  .~.~.~> Position of one working member controls motive fluid valve for another {2}
347  DF  .~.~.~> Single member controls motive fluid for each working member

DEFINITION

Classification: 417/339

(under subclass 338) Apparatus in which the motor working members are motivated by fluid (includes internal combustion engines) and in which said pumping and motor working members partake of alternate to-and-fro motion.

(1) Note. The plural pumping members under this definition must each provide an output of fluid for external use.

Therefore, a motor driven pump which is a mere auxiliary or ancillary of another motor driven pump (e.g., supplies motive fluid or cooling fluid for another motor driven pump) is not included under this definition.

(2) Note. Pumping members or working members of the flexible wall type or which partake of an oscillatory motion are included under this definition.

(3) Note. Plural relatively movable common piston or common flexible wall type pump-motors fall within the scope of this definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

246, for plural relatively movable pumping members driven by plural relatively movable working members wherein the pumping members serially act upon the pumped fluid.