US PATENT SUBCLASS 122 / 87
.~.~ U-coupling

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}
87.~.~ U-coupling

DEFINITION

Classification: 122/87

(under subclass 51) Devices provided with U-shaped couplings connecting the fire tubes at the ends of the boiler, in order

that the products of combustion may flow back and forth through the fire tubes in succession.

SEE OR SEARCH THIS CLASS, SUBCLASS:

75, for miscellaneous boilers of the horizontal fire-tube type where the products of combustion pass back and forth through the fire tubes.

360, for U-couplings.