US PATENT SUBCLASS 91 / 499
.~ Cylinders parallel to rotation axis

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

472  DF  THREE OR MORE CYLINDERS ARRANGED IN PARALLEL RADIAL OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS {10}
499.~ Cylinders parallel to rotation axis {6}
500  DF  .~.~> Plural angularly disposed cylinder banks
501  DF  .~.~> Cylinders contain plural oppositely movable pistons
502  DF  .~.~> Including plural axially spaced working chambers (e.g., double-acting working members)
503  DF  .~.~> Rotary spool valve
504  DF  .~.~> Stroke control {1}
507  DF  .~.~> Positive bidirectional drive of reciprocating members

DEFINITION

Classification: 91/499

(under subclass 472) Apparatus in which the longitudinal axes of said plural cylinders are parallel to and spaced from said axis of rotation.

SEE OR SEARCH CLASS

73, Measuring and Testing,

244, for meters having plural parallel cylinders and a wobble plate or cam associated therewith.

74, Machine Element or Mechanism, appropriate subclasses, for mechanical motion converting apparatus having no motive fluid valving or porting claimed and see especially

22, for apparatus for converting rotary motion to reciprocating and rotary motion and subclass 55, for apparatus employing a cam and slide for converting rotary motion to or from reciprocating or oscillating motion.

92, Expansible Chamber Devices, appropriate subclasses, for expansible chamber devices having plural radial cylinders in which there is no valving of motive fluid claimed and see especially 57, for plural rotating cylinders in which the axes of the cylinders are parallel to the axes of rotation, subclass 70, for relatively movable working members forming opposite walls of a common chamber and interconnected with and parallel to a common rotatable shaft, subclass 71, for relatively movable

working members interconnected with and parallel to a common rotatable shaft.

417, Pumps,

269, for pumps having three or more cylinders arranged in parallel relationship with a rotary transmission axis.