US PATENT SUBCLASS 92 / 12.1
DISPLACEMENT CONTROL OF PLURAL CYLINDERS ARRANGED IN PARALLEL, RADIAL, OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS

Current as of: June, 1999
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92 /   HD   EXPANSIBLE CHAMBER DEVICES

12.1DISPLACEMENT CONTROL OF PLURAL CYLINDERS ARRANGED IN PARALLEL, RADIAL, OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS {10}
12.2  DF  .~> Parallel cylinders {1}
13.1  DF  .~> Having motor-operated adjustment
13.2  DF  .~> Flexible wall-type working member
13.3  DF  .~> Stroke of one working member adjustable relative to another
13.4  DF  .~> Predetermined discrete incremental adjustment positions {1}
13.5  DF  .~> Independent adjustment of opposite stroke limits of single reciprocating working member
13.51  DF  .~> Axial adjustment of spaced, rigidly interconnected working member faces
13.6  DF  .~> Adjustable abutment positioned within working chamber
13.7  DF  .~> BY adjusting or limiting motion of relatively movable power transmission element
13.8  DF  .~> Adjustment means includes external axially extending threaded piston stem

DEFINITION

Classification: 92/12.1

(under the class definition) Apparatus comprising two or more cylinders, each cylinder being provided with a relatively reciprocating piston (includes diaphragm) to thereby form a plurality of expansible chambers, the cylinders or a transmission element in common operative engagement with said cylinders or pistons being adapted for continuous rotation about a fixed axis; said cylinders being physically arranged in a manner such that their longitudinal axes either (1) intersect at a common point or (2) extend parallel to said

axis of rotation; there being provided means to selectively vary either the extent or end limits of reciprocatory movement between said cylinders and their respective relatively reciprocating pistons.

SEE OR SEARCH CLASS

91, Motors: Expansible Chamber Type,

473, for expansible chamber type motors having three or more cylinders arranged in parallel, radial, or conical relationship with a rotary transmission axis in which means are provided for controlling the drive transmission of the motor in response to a sensed condition and subclasses 497+ for expansible chamber type motors having three or more cylinders arranged in radial relationship with a rotary transmission axis and means for varying the relative reciprocatory stroke between the motor cylinders and pistons.

417, Pumps,

218+, for means for controlling an adjustable cam or linkage in a pump drive transmission in response to a sensed condition.