Patent US3735746A successfully refreshed from Google Patents.
US3735746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring carrier for light alloy pistons
Assignee: SCHMIDT K GmbH
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Filing: 1971-01-14
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Granted: 1973-05-29
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Expires: 1991-01-14
Abstract
Abstract Ferrous ring carriers for internal combustion engine pistons are provided and include an annular land formed by a flange of the ring carrier which is adjacent to the skirt end of the piston. The preferred location for the ring carrier is nearest the head of the piston.
Inventors
- 👤 G Bad Schieber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:57
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
Light alloy piston for internal-combustion engines comprising a ring carrier having an annular land which together form the piston ring groove nearest the head of the piston, said annular land having a face which faces away from the piston head and forms a wall of the next adjacent ring groove, the remaining walls of said next adjacent ring groove being formed by the material of the light alloy piston, at least 70 percent up to 100 percent of said face consisting of the material of the ring carrier.
Claim 2
Dependent Claim
88 words
Light alloy piston for internal-combustion engines comprising a ring carrier having an annular land which together form the piston ring groove nearest the head of the piston, said annular land having a face which faces away from the piston head and forms a wall of the next adjacent ring groove, the remaining walls of said next adjacent ring groove being formed by the material of the light alloy piston, at least 70 percent up to 100 percent of said face consisting of the material of the ring carrier.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |