The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 2009
Filed:
Jan. 12, 2005
Applicant:
Majid S. Delpassand, Houston, TX (US);
Inventor:
Majid S. Delpassand, Houston, TX (US);
Assignee:
Smith International, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01C 1/10 (2006.01); F01C 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A progressing cavity stator and a method for fabricating such a stator are disclosed. The progressing cavity stator includes first and second elastomer layers fabricated from corresponding first and second elastomer materials. The first and second elastomer materials are selected to have at least one distinct material property. Exemplary embodiments of this invention may reduce tradeoffs associated with elastomer material selection and may further address the heat build up and subsequent elastomer breakdown in the lobes of prior art stators.