US PATENT SUBCLASS 60 / 517
.~ Unit of mass is a gas which is heated or cooled in one of a plurality of constantly communicating expansible chambers and freely transferable therebetween

Current as of: June, 1999
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60 /   HD   POWER PLANTS

516  DF  MOTOR OPERATED BY EXPANSION AND/OR CONTRACTION OF A UNIT OF MASS OF MOTIVATING MEDIUM {3}
517.~ Unit of mass is a gas which is heated or cooled in one of a plurality of constantly communicating expansible chambers and freely transferable therebetween {9}
518  DF  .~.~> Having means to change operational phase relationship of working member and displacer
519  DF  .~.~> Expansible chamber having rotatable or oscillatory displacer
520  DF  .~.~> Having free floating displacer or transfer piston
521  DF  .~.~> Having means to increase or diminish quantity of motivating mass
522  DF  .~.~> Having means to control rate of flow of mass between chambers
523  DF  .~.~> Having electrical heating means for mass
524  DF  .~.~> Having means to control temperature of heating or cooling chamber
525  DF  .~.~> Motor having plural working members
526  DF  .~.~> Motor having regenerator for mass

DEFINITION

Classification: 60/517

(under subclass 516) Apparatus in which the unit or working medium is a gas which is confined to circulation between two communicating expansible chambers, one of said expansible chambers is a working chamber wherein said gas expands or contracts to energize a working member to do useful work, and the other of the expansible chambers acts as a displacer or transmitting means for said working medium.

(1) Note. Engines which operate by the principle set forth herein have been known variously as: Air Engine, Caloric Engine, Compressor Engine, Compressed Air Engine, Hot Air (Gas) Engine, Stirling Cycle Engine.

SEE OR SEARCH CLASS

62, Refrigeration,

6, for "Stirling Cycle" refrigeration producers.