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Patent US3977709A successfully refreshed from Google Patents.
US3977709A
Expired / Lapsed
US
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Universal interface gasket
Assignee: Fischer and Porter Co
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Filing: 1975-05-08
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Granted: 1976-08-31
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Expires: 1995-05-08
Abstract
Abstract An interface gasket which is interposable between the conical ends of glass pipes to be joined, the gasket being compressed by means of flanges mounted on the pipe ends and interconnected by bolts. The gasket is constituted by an annular sheath whose internal diameter corresponds to the internal diameter of the pipe, the sheath being provided with a rim dimensioned to engage the end of the pipe and encircle its outer diameter, the sheath having a circular channel within which is received a compressible core ring.
Inventors
- 👤 Peter T. Hatzis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:27
CPC Classifications
F; F16; F16L; F16L49/00; F16L49/04; Y; Y10; Y10S; Y10S285/00; Y10S285/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
An interface gasket interposed between the conical ends of two glass pipes which are joined together to form a flow line, the gasket being compressed between the pipe ends by means of flanges mounted on the pipe ends and interconnected by bolts to effect a joint seal, said gasket comprising: A. an annular one-piece sheath formed of a fluoro-carbon polymer having an inner diameter corresponding to the inner diameter of the pipes which are joined, said sheath having only one relatively thick projecting rim having a uniform inner and outer diameter which encircles one of said conical pipe ends and engages only the extremity thereof, and B. a ring-shaped core of compressible material received in a circular groove formed in said sheath, said core material being selected from the class consisting of Neoprene-asbestos and silicone rubber, the thickness of the rim being greater than the thickness of the core.
Claim 2
Dependent Claim
149 words
An interface gasket interposed between the conical ends of two glass pipes which are joined together to form a flow line, the gasket being compressed between the pipe ends by means of flanges mounted on the pipe ends and interconnected by bolts to effect a joint seal, said gasket comprising: A. an annular one-piece sheath formed of a fluoro-carbon polymer having an inner diameter corresponding to the inner diameter of the pipes which are joined, said sheath having only one relatively thick projecting rim having a uniform inner and outer diameter which encircles one of said conical pipe ends and engages only the extremity thereof, and B. a ring-shaped core of compressible material received in a circular groove formed in said sheath, said core material being selected from the class consisting of Neoprene-asbestos and silicone rubber, the thickness of the rim being greater than the thickness of the core.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |