Patent US4762330A successfully refreshed from Google Patents.
US4762330A
Expired / Lapsed
US
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Sealing ring
Assignee: Goetze GmbH
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Filing: 1986-04-10
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Granted: 1988-08-09
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Expires: 2006-04-10
Abstract
Abstract A sealing ring, having a ring body made, for example, of high-temperature resistant compressed metal fibers includes a roughened surface adapted to be pressed against and displaced by sliding relative to a counter-face.
Inventors
- 👤 Klaus Lonne
- 👤 Klaus-Peter Majewski
- 👤 Franz-Josef Giesen
- 👤 Rudiger Voigt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:06
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1805; F01N13/1811; F01N13/16; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/126; F16L; F16L27/00; F16L27/02; F16L27/04; F16L27/06; F16L27/073; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/936; Y10S277/944; Y10S277/945; Y10S277/946; Y10S285/00; Y10S285/91; Y10S285/917; Y10S384/00; Y10S384/90; Y10S384/907; Y10S384/908; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
52 words
A sealing ring comprising a ring material formed of a compressed mixture of a high-temperature resistant metal fiber and a low-friction material; said sealing ring having a surface adapted to be pressed against and displaced by sliding relative to a counter-face; said surface being free from said low-friction material and being roughened.
Claim 2
Dependent Claim
52 words
A sealing ring comprising a ring material formed of a compressed mixture of a high-temperature resistant metal fiber and a low-friction material; said sealing ring having a surface adapted to be pressed against and displaced by sliding relative to a counter-face; said surface being free from said low-friction material and being roughened.
Claim 3
Dependent Claim
30 words
A sealing ring as defined in claim 1, further comprising a coating of hexagonal boron nitride carried on said roughened surface, said coating being chemically distinct from said low-friction material.
Claim 4
Dependent Claim
25 words
A sealing ring as defined in claim 2, wherein said hexagonal boron nitride is present in a quantity of up to 0.03 g/cm 2 .
Claim 5
Dependent Claim
34 words
A sealing ring as defined in claim 2, wherein said hexagonal boron nitride is present in a mixture with polytetrafluoroethylene powder of up to twice the quantity by weight of the hexagonal boron nitride.
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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) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |