US PATENT SUBCLASS 122 / 463
.~.~.~.~.~ Internal fire tube

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

459  DF  STEAM TREATMENT {7}
*  DD  .~ Fire tube boiler {3}
*  DD  .~.~ Horizontal {1}
461  DF  .~.~.~ Superheater {3}
*  DD  .~.~.~.~ Interior steam space {1}
463.~.~.~.~.~ Internal fire tube

DEFINITION

Classification: 122/463

(under subclass 461) Devices comprising horizontal fire tube boilers having a steam space within the boiler separate from the main steam space, in which are fire tubes for superheating the steam.

SEE OR SEARCH THIS CLASS, SUBCLASS:

482, for boilers having fire tubes in the steam space of a boiler for superheating the steam.