Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
James J. Volk0
Date of Patent
November 6, 2007
Patent Application Number
11138124
Date Filed
May 26, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
A centrifugal pump includes plural pump stages, each comprising an impeller assembly, a stationary disc assembly and a diffuser assembly, all disposed about an impeller shaft. A floating impeller hub seal is supported by a diffuser assembly to minimize fluid recirculation. A thrust washer is disposed around the impeller shaft and is engageable with an impeller hub and the hub seal. A wear ring is secured to a disc assembly and engageable with a wear surface on the impeller.
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