US PATENT SUBCLASS 122 / 59
.~.~.~ Circulation conduit

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

44.1  DF  FIRE TUBE {11}
51  DF  .~ Horizontal {22}
58 R  DF  .~.~ Drop water firebox {11}
59.~.~.~ Circulation conduit

DEFINITION

Classification: 122/59

(under subclass 58) Devices with a conduit located either inside or outside the boiler to connect the water firebox with the opposite end of the boiler to help the circulation of the water.

SEE OR SEARCH THIS CLASS, SUBCLASS:

91, for water conduits provided with a sediment trap and water heating tubes.