US PATENT SUBCLASS 165 / DIG 156
.~.~ Hollow cylindrical member (e.g., drum, etc.)


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 156.~.~ Hollow cylindrical member (e.g., drum, etc.) {3}
DIG 157  DD  .~.~.~> Fluid sprayed onto surface of rotatable cylinder
DIG 158  DD  .~.~.~> Having stationary material removal means
DIG 159  DD  .~.~.~> With particular flow path or defined fluid chamber (e.g., annulus, spiral, etc.) {1}