US PATENT SUBCLASS 122 / 419
.~.~.~ Detachable


Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

412  DF  FEED HEATERS {17}
*  DD  .~ Fire-engine boiler {1}
*  DD  .~.~ Auxiliary {2}
419.~.~.~ Detachable


DEFINITION

Classification: 122/419

(under subclass 412) Water heaters for keeping water in a fire engine boiler hot when the fire engine is in the engine house and the firebox is not in use, which consist of a stationary water heater located in the engine house, adapted to be coupled to the fire engine boiler to establish a water circulation.

SEE OR SEARCH CLASS

237, Heating Systems,

12.2, for combinations of this heating device with the heating system of the engine house.