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Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Aaron Ronk0
Date of Patent
August 12, 2008
Patent Application Number
10973965
Date Filed
October 26, 2004
Patent Primary Examiner
Patent abstract
A pump assembly includes a pump housing, a stator ring supported within the pump housing, and a pump ring also rotatably supported within the pump housing. The pump ring interfaces with the stator ring to define a plurality of variable volume pressure chambers. A cover plate covers the stator ring and pumping ring within the pump housing. The cover plate is axially displaceable relative to the pump housing and defines a wall of each of the pressure chambers. Pressure within the pressure chambers induces linear movement of the cover plate away from the stator ring and the pump ring.
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