US PATENT SUBCLASS 165 / 117
.~.~ Pipe exterior to pipe exterior

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

110  DF  WITH FIRST FLUID HOLDER OR COLLECTOR OPEN TO SECOND FLUID {2}
115  DF  .~ Trickler {3}
117.~.~ Pipe exterior to pipe exterior

DEFINITION

Classification: 165/117

(under subclass 115) Apparatus comprising vertically spaced horizontally extending exchange fluid conducing pipe sections with means distributing liquid along the exterior of an upper pipe section for flow thereover onto the exterior of a lower pipe section.