US PATENT SUBCLASS 417 / 461
.~.~ Cylinder rotates or oscillates about longitudinal axis

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
460  DF  .~ Moving cylinder {7}
461.~.~ Cylinder rotates or oscillates about longitudinal axis

DEFINITION

Classification: 417/461

(under subclass 460) Apparatus in which the cylinder has an absolute rotational or oscillatory motion about the longitudinal axis thereof (i.e., the axis of reciprocation of a piston therein) during operation of the pump.