US PATENT SUBCLASS 165 / DIG 140
.~.~ Rotating heat exchanger having rotating flow confining structures or chambers for two separate heat exchange fluids

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

DIG 135  DD  MOVABLE HEAT EXCHANGER {4}
DIG 139  DD  .~ Fully rotatable {5}
DIG 140.~.~ Rotating heat exchanger having rotating flow confining structures or chambers for two separate heat exchange fluids {2}
DIG 141  DD  .~.~.~> Concentric flow confining structures or chambers {1}
DIG 143  DD  .~.~.~> Discrete tubing having length extending along a longitudinal axis of rotating heat exchanger {1}