US PATENT SUBCLASS 122 / 82
.~.~.~ In communication

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


122 /   HD   LIQUID HEATERS AND VAPORIZERS

44.1  DF  FIRE TUBE {11}
51  DF  .~ Horizontal {22}
*  DD  .~.~ Superjacent feed heater {1}
82.~.~.~ In communication

DEFINITION

Classification: 122/82

(under subclass 51) Devices having a feed water heater located above the main boiler, in the combustion flue, heated by the products of combustion, and in open communication with the water space of the boiler.

SEE OR SEARCH THIS CLASS, SUBCLASS:

443, for superposed feed heaters in communication with the boiler steam space.