US4832353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring seals
Assignee: NICHOLSONS SEALING TECHNOLOGIES Ltd
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Filing: 1988-06-27
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Granted: 1989-05-23
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Expires: 2008-06-27
Abstract
Abstract A heat safe ring seal comprises a metallic hollow ring (1) of uniform material thickness and radially inwardly facing channel-shaped radial profile. The walls of the channel adjacent their free ends are curved towards each other so as to form axially outwardly facing grooves (1a) which each accommodate and shield a concentric ring (2) of PTFE or elastomeric material.
Inventors
- 👤 Terence P. Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:44
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/021; F16J15/022; F16J15/024; F16J15/025; F16J15/06; F16J15/08; F16J15/0887; F16J15/10; F16J15/12; F16J15/121; F16J15/122; F16J15/123; F16L; F16L23/00; F16L23/16; F16L23/18; F05; F05C; F05C2225/00; F05C2225/04; Y; Y10; Y10S; Y10S277/00; Y10S277/91; Y10S277/935; Y10S277/944; Y10S277/945; Y10S277/946
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
54 words
A ring seal comprising a metallic hollow ring of uniform material thickness and radially inwardly facing channel-shaped radial profile, the walls of such channel adjacent their free ends being curved towards each other so as to form axially outwardly facing grooves which each accommodate and shield a concentric ring of PTFE or elastomeric material.
Claim 2
Dependent Claim
54 words
A ring seal comprising a metallic hollow ring of uniform material thickness and radially inwardly facing channel-shaped radial profile, the walls of such channel adjacent their free ends being curved towards each other so as to form axially outwardly facing grooves which each accommodate and shield a concentric ring of PTFE or elastomeric material.
Claim 3
Dependent Claim
19 words
A ring seal according to claim 1 in which the channel is of capital omega (Ω) shaped radial profile.
Claim 4
Dependent Claim
18 words
A ring seal according to claim 1 in which the channel is of ellipsoidal or parabolic radial profile.
Claim 5
Dependent Claim
22 words
A ring seal according to claim 2 in which the radially inward end parts of the metallic ring are straight and parallel.
Claim 6
Dependent Claim
25 words
A ring seal according to claim 3 in which the radially innermost parts of the metallic ring are contained by a common imaginary cylindrical surface.
References Cited (Backward Citations)
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US1892618A
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DE614140C
Cited
US2631908A
Cited
GB840220A
Cited
US4089535A
Cited
US4319758A
Cited
US4508356A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |