Patent US4679681A successfully refreshed from Google Patents.
US4679681A
Expired / Lapsed
US
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Synchronizing ring and process of manufacturing the same
Assignee: Kolbenschmidt AG
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Filing: 1985-03-29
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Granted: 1987-07-14
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Expires: 2005-03-29
Abstract
Abstract A synchronizing ring is composed of a composite material comprising a metallic layer consisting of aluminum alloy and having a thickness of 0.1 to 1.0 mm forming a friction cone and a steel backing layer having a thickness of 0.5 to 3.5 mm and cladded to the metallic layer. The invention also includes a process of manufacturing a synchronizing ring by metal forming.
Inventors
- 👤 Martin Creydt
- 👤 Wolfgang Bickle
- 👤 Harald Pfestorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:32
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/02; F16D23/025; F16D2250/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
81 words
A synchronizing ring comprising a metal formed blank composed of a composite material, comprising a metallic layer consisting of an aluminum alloy of the type selected from the group of Al Si 12 Cu Ni Mg, Al Si 18 Cu Ni Mg and Al Zn 4.5 Si Pb Cu Mg and having a thickness of 0.1 to 1.0 mm forming a friction cone and a steel backing layer having a thickness of 0.5 to 3.5 mm cladded to the metallic layer.
Claim 2
Dependent Claim
81 words
A synchronizing ring comprising a metal formed blank composed of a composite material, comprising a metallic layer consisting of an aluminum alloy of the type selected from the group of Al Si 12 Cu Ni Mg, Al Si 18 Cu Ni Mg and Al Zn 4.5 Si Pb Cu Mg and having a thickness of 0.1 to 1.0 mm forming a friction cone and a steel backing layer having a thickness of 0.5 to 3.5 mm cladded to the metallic layer.
Claim 3
Dependent Claim
17 words
A synchronizing ring according to claim 1, wherein said metallic and backing layers consist of sheet metal.
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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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |