Patent ID: 7172016

Claim:
A rotary compressor machine comprising: a rotatable shaft having at least one compressor wheel thereon; a housing containing at least said one compressor wheel and having an inlet to said compressor wheel and an outlet; and a heat exchanger within said housing and located between said compressor wheel and said outlet, said heat exchanger being donut-shaped and having axially elongated tube constructions extending between and metallurgically bonded to spaced header plates, tanks closing said header plates oppositely of said tube constructions, and fins extending between adjacent tube constructions, said heat exchanger having a generally cylindrical outer periphery extending between said header plates and a generally cylindrical inner periphery extending between said header plates with said tube constructions and fins located between said inner and outer peripheries, a first apertured cylindrical cage extending between and metallurgically bonded to said header plates at said outer periphery and a second apertured cylindrical cage extending between and metallurgically bonded to said header plates at said inner periphery.