US PATENT SUBCLASS 165 / 9.2
.~.~ Gradated flow area, heat capacity or heat resistance

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

4  DF  REGENERATOR {4}
9.1  DF  .~ Checker brick structure {3}
9.2.~.~ Gradated flow area, heat capacity or heat resistance

DEFINITION

Classification: 165/9.2

(under subclass 9.1) Apparatus in which the modular units are (1) arranged to form a flow passage increasing or decreasing in size along the assembly or (2) are formed of different material along the direction of flow providing progressive resistance to damage by heat or having progressive heat storing characteristics.