US PATENT SUBCLASS 122 / 136 R
.~ Horizontal

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

135.1  DF  FLUE {4}
136 R.~ Horizontal {7}
137  DF  .~.~> Plural {1}
139  DF  .~.~> Drop water firebox
140.1  DF  .~.~> Internal water tube {7}
149  DF  .~.~> Return fire tube {2}
152  DF  .~.~> Water grate in flue
153  DF  .~.~> Water tube {1}
136 C  DF  .~.~> Horizontal-corrugated or finned

Unofficial Alpha Subclasses: R C

DEFINITION

Classification: 122/136

(under subclass 135) Subject matter placed horizontally, not otherwise provided for.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47, for miscellaneous fire tube boilers having a large

horizontal flue.

78, for horizontal return fire tube boilers with a horizontal flue firebox.

80, for horizontal fire tube boilers with a large flue boiler section beneath the boiler.

409+, for similar structure used in regulating circulation.