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:
Jul. 19, 2016
Filed:
Mar. 30, 2010
Applicants:
Lance D. Underwood, Morrison, CO (US);
William D. Murray, Tomball, TX (US);
Thomas K. Washburn, Cypress, TX (US);
Inventors:
Lance D. Underwood, Morrison, CO (US);
William D. Murray, Tomball, TX (US);
Thomas K. Washburn, Cypress, TX (US);
Assignee:
SMITH INTERNATIONAL INC., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01C 1/10 (2006.01); B23P 15/00 (2006.01); B21K 21/12 (2006.01); B23H 3/04 (2006.01); B23H 9/00 (2006.01); F03C 2/08 (2006.01); F04C 2/107 (2006.01); F04C 13/00 (2006.01);
U.S. Cl.
CPC ...
B23P 15/00 (2013.01); B21K 21/12 (2013.01); B23H 3/04 (2013.01); B23H 9/003 (2013.01); F03C 2/08 (2013.01); F04C 2/1075 (2013.01); F04C 13/008 (2013.01); F04C 2230/101 (2013.01); Y10T 29/49229 (2015.01);
Abstract
A Moineau style stator includes a stator tube having a plurality of rigid helical lobes formed on an inner surface thereof. The helical lobes define a major internal tube diameter that is greater than a pass through diameter of the tube such that the major diameter undercuts the pass through diameter of the tube. A major liner diameter may also be less than the pass through diameter so as to provide a suitable interference fit between rotor and stator.