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. 19, 2005
Filed:
Jun. 19, 2003
Mark D. Zitka, The Woodlands, TX (US);
William D. Murray, Tomball, TX (US);
Mark D. Zitka, The Woodlands, TX (US);
William D. Murray, Tomball, TX (US);
Robbins & Myers Energy Systems, L.P., Houston, TX (US);
Abstract
A progressive cavity pump or motor, particularly suitable for hydrocarbon recovery operations, includes a rotorand a stator. Fluid pressure in cavities between the stator and the rotor create torque which rotates the bit. An interior surface of the stator is rigidly secured to the outer housing of the pump stator and defines an interior profile. A substantially uniform thickness elastomeric layeris supported on the outer housing. The pump rotor has an exterior profile which corresponds with the interior profile of the elastomeric layer.