US PATENT SUBCLASS 418 / 16
WITH CHANGEABLE WORKING CHAMBER MAGNITUDE

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

16WITH CHANGEABLE WORKING CHAMBER MAGNITUDE {10}
17  DF  .~> Speed controlled
18  DF  .~> Intermittently accelerated and receding members rotate in same path (alternating piston type)
19  DF  .~> Intermeshing rotary members {2}
22  DF  .~> Axially or radially spaced working chambers
23  DF  .~> By adjustably limiting vane or abutment movement
24  DF  .~> Spring or fluid biased movable member {2}
28  DF  .~> By axial movement of movable member
29  DF  .~> Rotating inner working or reacting member repositioned relative to cylinder
30  DF  .~> By cylinder or cylinder portion pivotal movement
31  DF  .~> Cylinder or cylinder portion moved linearly and radially

DEFINITION

Classification: 418/16

(under the class definition) Apparatus in which in addition

to the relative movement normally occurring between the working member and the other working chamber surfaces in the operation of a rotary expansible chamber device, the expansible chamber device has a portion thereof mounted for relative movement, and movement of which effects a change in a dimension of and therefore the voluminal space comprising the working chamber to thereby vary the amount of working fluid passing therethrough, no change occurring in the working member rotational speed.

(1) Note. Those devices in which an adjustment is made to provide a better sealing arrangement or compensate for wear between cooperating parts and which may incidentally vary the volumetric capacity are not classifiable here under this definition and are classified either in subclasses 104+ or on other features.