Patent US3215130A successfully refreshed from Google Patents.
US3215130A
Expired / Lapsed
US
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Multipart oil cooled internal combustion engine piston
Assignee: Mahle GmbH
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Filing: 1964-06-10
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Granted: 1965-11-02
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Expires: 1984-06-10
Abstract
No abstract record available.
Inventors
- 👤 Maier Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:40
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/0015; F02F3/0023; F02F3/16; F02F3/20; F02F3/22; F01; F01M; F01M1/00; F01M1/08; F01M2001/086; F05; F05C; F05C2251/00; F05C2251/04; F05C2251/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN AN INTERNAL COMBUSTION ENGINE PISTON HAVING A PISTON HEAD REMOVABLY SECURED TO A PISTON BODY BY BOLTS, EACH HAVING A SHANK EXTENDING FROM WITHIN THE PISTON HEAD INTO A BLIND BORE IN THE PISTON BODY, NUT MEANS FOR SECURING THE BOLT IN THE PISTON HEAD, AND MEANS FOR COOLING THE PISTON WITH OIL UNDER PRESSURE, THE IMPROVEMENT IN WHICH THE COOLING MEANS INCLUDES A SUBSTANTIALLY CIRCULAR CHAMBER AROUND THE SHANK OF THE BOLT, AND COOLING OIL INLET AND OUTLET OPENINGS IN SAID CHAMBER.
Claim 2
Dependent Claim
84 words
IN AN INTERNAL COMBUSTION ENGINE PISTON HAVING A PISTON HEAD REMOVABLY SECURED TO A PISTON BODY BY BOLTS, EACH HAVING A SHANK EXTENDING FROM WITHIN THE PISTON HEAD INTO A BLIND BORE IN THE PISTON BODY, NUT MEANS FOR SECURING THE BOLT IN THE PISTON HEAD, AND MEANS FOR COOLING THE PISTON WITH OIL UNDER PRESSURE, THE IMPROVEMENT IN WHICH THE COOLING MEANS INCLUDES A SUBSTANTIALLY CIRCULAR CHAMBER AROUND THE SHANK OF THE BOLT, AND COOLING OIL INLET AND OUTLET OPENINGS IN SAID CHAMBER.
References Cited (Backward Citations)
US1226631A
Cited
US2759461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |