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Method of forming shrink-fit compression sealA method for making a glass-to-metal seal is described. 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 the contaminants.
Document ID
19770016538
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Podgorski, T. J.
(Honeywell Inc., Minneapolis, United States)
Date Acquired
August 8, 2013
Publication Date
April 19, 1977
Subject Category
Mechanical Engineering
Report/Patent Number
Patent Number: US-PATENT-4,017,959
Patent Application Number: US-PATENT-APPL-SN-672815
Patent Number: NASA-CASE-LAR-11563-1
Accession Number
77N23482
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,017,959|NASA-CASE-LAR-11563-1
Patent Application
US-PATENT-APPL-SN-672815
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