US PATENT SUBCLASS 60 / 643
MOTIVE FLUID ENERGIZED BY EXTERNALLY APPLIED HEAT

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

643MOTIVE FLUID ENERGIZED BY EXTERNALLY APPLIED HEAT {11}
644.1  DF  .~> Heating motive fluid by nuclear energy
645  DF  .~> Process of power production or system operation {9}
655  DF  .~> Noncommunicating heat transferring motive fluid system (e.g., cascade, etc.)
656  DF  .~> Having ancillary structure for starting
657  DF  .~> Having apparatus cleaning, sealing, lubricating, purging, standby, or protecting feature {1}
659  DF  .~> Including heat, steam, or compressed gas storage means
660  DF  .~> Having condition responsive control {6}
668  DF  .~> Power system physically related to vehicle structure
669  DF  .~> Motor mounted in or on boiler
670  DF  .~> Power system involving change of state {6}
682  DF  .~> Single state motive fluid energized by indirect heat transfer {2}

DEFINITION

Classification: 60/643

(under the class definition) Subject matter comprising (1) apparatus having (a) means to cause motive fluid to be increased in energy by the indirect addition of heat thereto and (b) a motor which is actuated by said motive fluid; and (2) a method of operating such apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:

616+, for a fluid motor the motive fluid for which has been energized by the heat of the exhaust of an internal combustion engine; subclasses 39.18 and 39.19, for multiple fluid operated motors, one operated by combustion products and another one operated by a different fluid generally energized by heat exchange with the combustion products in the first motor; subclass 641, for a heat operated power system where the source of energy is natural heat; subclasses 516+, for a motor operated by the expansion and/or contraction of a unit of mass of motivating medium; and subclasses 508+, for a motor operated by the heating or cooling of a fluid within an expansible chamber.

SEE OR SEARCH CLASS

136, Batteries: Thermoelectric and Photoelectric,

200+, for the direct development of electrical power from indirectly applied heat.