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:
Aug. 18, 2015
Filed:
Feb. 11, 2011
Lannie Laroy Dietle, Houston, TX (US);
Aaron Richie, Houston, TX (US);
Victor Garcia, Jr., Richmond, TX (US);
Jeffrey D. Gobeli, Houston, TX (US);
John Erick Schroeder, Houston, TX (US);
Lannie Laroy Dietle, Houston, TX (US);
Aaron Richie, Houston, TX (US);
Victor Garcia, Jr., Richmond, TX (US);
Jeffrey D. Gobeli, Houston, TX (US);
John Erick Schroeder, Houston, TX (US);
Kalsi Engineering, Inc., Sugar Land, TX (US);
Abstract
A seal backup ring is provided with undulating surfaces which create circumferential convergence with a relatively rotatable surface. The backup ring is configured so that differential pressure acting across a rotary seal forces portions of the backup ring against the relatively rotatable surface, closing, or substantially closing, the extrusion gap that the rotary seal is exposed to. In response to relative rotation between the backup ring and the mating relatively rotatable surface, the circumferential convergence promotes hydrodynamic lubrication within the dynamic interface that exists between the backup ring and the relatively rotatable surface. The modulus of elasticity of the backup ring is greater than the modulus of elasticity of the rotary seal.