Arrangement for the sealing-off of metallic cylindrical bodies

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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277138, 277153, F16J 1500

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active

053683129

ABSTRACT:
A sealing arrangement for the sealing-off of metallic cylindrical bodies is disclosed, particularly for shafts in cryogenic valves which are surrounded by an essentially ring-shaped sealing device which cannot be glued to metal. The sealing device is surrounded by a ring which is arranged concentrically with respect to the shaft, consists of a metal alloy with shape memory characteristics and with a one-way characteristic and the interior shape of which is adapted to the exterior shape of the sealing device and which contracts when the transition temperature is exceeded.

REFERENCES:
patent: 3109293 (1963-11-01), Williams et al.
patent: 3188098 (1965-06-01), Skinner
patent: 3630533 (1971-12-01), Butler
patent: 4240643 (1980-12-01), Becker et al.
patent: 4706970 (1987-11-01), Ramirez
patent: 5171024 (1992-12-01), Janocko
patent: 5217232 (1993-06-01), Makhobey
"Anwendung von Formgedachtnis-Legierungen in der Technik", by Dr. P. Tautzenberger und Prof. Dr. D. Stockel, Pforzheim, Neue Werkstofftechnologien, Carl Hanser Verlag Munchen 1986, pp. 703-708.
"Formgedachtnislegierungen fur moderne Problemlosungen", by Von Klaus Halter et al., Technische Rundschau, pp. 30-39. May 1991.

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