O-Ring sealing arrangements for ultra-high vacuum systems

Details O-Ring sealing arrangements for ultra-high vacuum systems O-Ring sealing arrangements for ultra-high vacuum systems

1978-03-30

1981-08-04

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 1, 29447, 285381, F16J 1508, F16L 2500

Patent

active

042818419

ABSTRACT:
An all metal reusable O-ring sealing arrangement for sealing two concentric tubes in an ultra-high vacuum system. An O-ring of a heat recoverable alloy such as Nitinol is concentrically positioned between protruding sealing rings of the concentric tubes. The O-ring is installed between the tubes while in a stressed martensitic state and is made to undergo a thermally induced transformation to an austenitic state. During the transformation the O-ring expands outwardly and contracts inwardly toward a previously sized austenitic configuration, thereby sealing against the protruding sealing rings of the concentric tubes.

REFERENCES:
patent: 2224145 (1940-12-01), Dugan et al.
patent: 3315986 (1967-04-01), Quick
patent: 3805567 (1974-04-01), Agius-Sinerco
patent: 3872573 (1975-03-01), Nichols et al.
patent: 3971566 (1976-07-01), Levinsohn et al.

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