Kalsi Engineering, Inc.

Victor Garcia, Jr

Lannie Laroy Dietle

John Erick Schroeder

Jeffrey D Gobeli

Aaron Paul Richie

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.

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Richmond, TX, United States of America

Victor Garcia, Jr