US PATENT SUBCLASS 165 / 183
.~.~ Longitudinal extending

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

177  DF  TUBULAR STRUCTURE {4}
181  DF  .~ With discrete heat transfer means {2}
183.~.~ Longitudinal extending {1}
184  DF  .~.~.~> Helical

DEFINITION

Classification: 165/183

(under subclass 181) Apparatus in which the longitudinal axis of the distinct heat conducting structure is disposed in a plane parallel to or forming a sharp angle with the axis of the tubular structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

171, for a panel formed by means, e.g., plate, spanning side by side tube elements.