US PATENT SUBCLASS 60 / 525
.~.~ Motor having plural working members

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  DF  .~ 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}
525.~.~ Motor having plural working members

DEFINITION

Classification: 60/525

(under subclass 517) Apparatus having more than one chamber in which expansion or contraction of said gas is converted into useful work.