Method of forming shrink-fit compression seal

Details Method of forming shrink-fit compression seal Method of forming shrink-fit compression seal

1976-04-01

1977-04-19

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

29DIG35, 53 9, 403273, B23P 1102

Patent

active

040179591

ABSTRACT:
A method for making a glass-to-metal seal. A domed metal enclosure having a machined seal ring is fitted to a glass post machined to a slight taper and to a desired surface finish. The metal part is then heated by induction in a vacuum. As the metal part heats and expands relative to the glass post, the metal seal ring, possessing a higher coefficient of expansion than the glass post, slides down the tapered post. Upon cooling, the seal ring crushes against the glass post forming the seal. The method results in a glass-to-metal seal possessing extremely good leak resistance, while the parts are kept clean and free of contaminants.

REFERENCES:
patent: 1331091 (1920-02-01), Becker
patent: 2768475 (1956-10-01), Seelen et al.
patent: 3623196 (1971-11-01), Bongenaar et al.
patent: 3963327 (1976-06-01), Poirier

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