Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Dale H. Parrett1
Date of Patent
May 8, 2007
1Patent Application Number
109477031
Date Filed
September 23, 2004
1Patent Primary Examiner
Patent abstract
A progressing cavity pump including a rotor and a stator having an inlet and an outlet. The rotor is rotationally disposed inside of the stator such that rotation of the rotor causes fluid in the pump to be pumped from the inlet toward the outlet in a downstream direction. The stator has an inner surface having a first portion made of a first material and a second portion made of a second material, the second portion being located in the downstream direction relative to the first portion.
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