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Expanding hollow metal rings

United States Patent

March 17, 2009
View the Complete Patent at the US Patent & Trademark Office
Savannah River National Laboratory - Visit the Technology Transfer Website
A sealing device that may expand more planar dimensions due to internal thermal expansion of a filler material. The sealing material is of a composition such that when desired environment temperatures and internal actuating pressures are reached, the sealing materials undergoes a permanent deformation. For metallic compounds, this permanent deformation occurs when the material enters the plastic deformation phase. Polymers, and other materials, may be using a sealing mechanism depending on the temperatures and corrosivity of the use. Internal pressures are generated by either rapid thermal expansion or material phase change and may include either liquid or solid to gas phase change, or in the gaseous state with significant pressure generation in accordance with the gas laws. Sealing material thickness and material composition may be used to selectively control geometric expansion of the seal such that expansion is limited to a specific facing and or geometric plane.
Peacock; Harold B. (Evans, GA), Imrich; Kenneth J. (Grovetown, GA)
Westinghouse Savannah River Company (Aiken, SC)
10/ 937,093
September 9, 2004
This invention was made with United States Government support under Contact No. DE-AC09-96SR18500 awarded by the United States Department of Energy. The Government has certain rights in the invention.