US PATENT SUBCLASS 60 / 670
.~ Power system involving change of state

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

643  DF  MOTIVE FLUID ENERGIZED BY EXTERNALLY APPLIED HEAT {11}
670.~ Power system involving change of state {6}
671  DF  .~.~> Motive fluid comprises a material other than steam or water {3}
675  DF  .~.~> Gravity motor actuated by weight of condensed vapor
676  DF  .~.~> Including plural distinct boilers, heat supplies or external sources of vapor
677  DF  .~.~> Serially connected motor with intermotor supply or withdrawal of motive fluid {1}
679  DF  .~.~> Having motive fluid reheater between serially connected motors {1}
681  DF  .~.~> Motor exhaust mixes with combustion products of boiler heater

DEFINITION

Classification: 60/670

(under subclass 643) Apparatus, in which vapor is generated from a liquid and utilized as motive fluid to actuate a motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

227, for a reaction motor in which the motive fluid is principally steam; subclass 531, for a motor operated by the vaporization and condensation of a confined mass; and subclass 514, for a motor in which liquid is supplied to and vaporized in an expansible chamber.