Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 28, 2007
Patent Application Number
11280147
Date Filed
November 15, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
A centrifugal compressor has a housing assembly and an impeller rotatably connected to the housing assembly. Gas introduced into the housing assembly by rotation of the impeller is compressed at least by centrifugal force. One aspect of the present invention is that the impeller includes an inducer portion having a pressure surface and a suction surface and a hole extending between the pressure surface and the suction surface. Another aspect of the present invention is that the centrifugal compressor includes a diffuser located downstream of the impeller, a volute in communication with an outlet of the diffuser, and a reflux passage connecting the diffuser with the volute for returning part of gas in the volute to the diffuser.
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