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Sealing Out-Of-Round Tubes With O-RingsGlass or ceramic tubes out-of-round sealed effectively by ordinary O-rings in caps of modified hydraulic fittings. In typical connection, O-ring squeezed between two surfaces having inward-opening slants of 5 degrees or 10 degrees. Slanted surfaces force ring inward, compressing it around tube. Connector metal fitting, tightened by hand around O-ring, seals O-ring against tube as much as 1/16 in. out of round. Modified connectors seal glass or ceramic tubes against gas or vacuum leakage in furnaces, vacuum systems, and tubes for glassblowing equipment.
Document ID
19910000475
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Shlichta, Paul J.
(Caltech)
Date Acquired
August 14, 2013
Publication Date
September 1, 1991
Publication Information
Publication: NASA Tech Briefs
Volume: 15
Issue: 9
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
NPO-17791
Accession Number
91B10475
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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