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AssigneeAir Products and Chemicals, Inc.
InventorsSteven Walton Rynders, Eric Minford, Richard Ernest Tressler, Dale M. Taylor
Estimating the term…
A high temperature, gas-tight seal is formed by utilizing one or more compliant metallic toroidal ring sealing elements, where the applied pressure serves to activate the seal, thus improving the quality of the seal. The compliant nature of the sealing element compensates for differences in thermal expansion between the materials to be sealed, and is particularly useful in sealing a metallic member and a ceramic tube art elevated temperatures. The performance of the seal may be improved by coating the sealing element with a soft or flowable coating such as silver or gold and/or by backing the sealing element with a bed of fine powder. The material of the sealing element is chosen such that the element responds to stress elastically, even at elevated temperatures, permitting the seal to operate through multiple thermal cycles.
A seal element which comprises a metallic toroidal ring having an axial cross section which defines a planar figure, wherein the planar figure partially encloses an area having an open side and a closed side, and wherein the toroidal ring has a ring width and a metal thickness such that the ratio of the ring width to the metal thickness is greater than about 15.
A seal assembly comprising:
A method for sealing a metallic member and a ceramic member which comprises:
Dependencies are inferred from the claim text.