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:
Dec. 09, 2014
Filed:
Apr. 07, 2011
Michael Guidry, Jr., Hockley, TX (US);
Michael Guidry, Jr., Hockley, TX (US);
Robbins & Myers Energy Systems L.P., Willis, TX (US);
Abstract
A progressing cavity pump/motor includes a stator () having a metal interior surface () and one or more spiraling internal lobes (). The rotor () has a metal exterior surface () and one or more spiraling external lobes () for cooperating with the stator to form progressing cavities between the stator and the rotor during rotation of the rotor. At least one of the stator interior surface and the rotor exterior surface include a plurality of spaced grooves () in the respective surface, such that fluid flowing to a gap between the stator and the rotor is disrupted by the spaced grooves to reduce fluid leakage between the stator and the rotor.