US PATENT SUBCLASS 60 / 690
.~ Motor and indirect heat exchanger

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

685  DF  MOTOR HAVING EXHAUST FLUID TREATING OR HANDLING MEANS {6}
690.~ Motor and indirect heat exchanger {3}
691  DF  .~.~> Boiler feed water heated by exhaust
692  DF  .~.~> Having condensate pump
693  DF  .~.~> Plural heat exchangers

DEFINITION

Classification: 60/690

(under subclass 685) Apparatus, including means for passing the exhaust fluid through a heat exchanger in which it is cooled indirectly.

SEE OR SEARCH THIS CLASS, SUBCLASS:

320+, for an internal combustion engine having an exhaust system element that is heated, cooled, or used as a heat source.

661, for the automatic control of condenser cooling water.

SEE OR SEARCH CLASS

165, Heat Exchange, appropriate subclass for a condenser, per se.

237, Heating Systems, 12.1+, for installations in which all or part of the exhaust steam is used for heating building, vehicles, or other inclosed structures.