US3187643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pistons for internal combustion engines
Assignee: Mirrlees National Ltd
•
Filing: 1963-09-24
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Granted: 1965-06-08
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Expires: 1983-09-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Pope
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:49
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/16; F02F3/20; F02F3/22; F02F3/0015; F02F3/0023; F05; F05C; F05C2201/00; F05C2201/04; F05C2201/0433; F05C2201/0448; F05C2251/00; F05C2251/04; F05C2251/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PISTON FOR AN INTERNAL COMBUSTION ENGINE HAVING CROWN AND SKIRT CHARACTERIZED IN THAT THE PISTON COMPRISES AN ASSEMBLY OF INNER AND OUTER CROWN MEMBERS BEING INTEGERS SEPARATE FROM BUT CONNECTED TO THE PISTON SKIRT BY COMPLEMENTARY CLAMPING SURFACES SO CONSTRUCTED AND ARRANGED AS TO PROVIDE A MECHANICAL JOINT WHICH SIMULTANEOUSLY PROVIDES A GAS SEAL AND REDUCES THE TRANSMISSION TO THE SKIRT OF STRESSES DUE TO BENDING OR DIMENSIONAL CHANGES IN THE CROWN ASSEMBLY AND FURTHER CHARACTERIZED IN THAT THE OUTER CROWN MEMBER IS FORMED ON ITS
Claim 2
Dependent Claim
87 words
A PISTON FOR AN INTERNAL COMBUSTION ENGINE HAVING CROWN AND SKIRT CHARACTERIZED IN THAT THE PISTON COMPRISES AN ASSEMBLY OF INNER AND OUTER CROWN MEMBERS BEING INTEGERS SEPARATE FROM BUT CONNECTED TO THE PISTON SKIRT BY COMPLEMENTARY CLAMPING SURFACES SO CONSTRUCTED AND ARRANGED AS TO PROVIDE A MECHANICAL JOINT WHICH SIMULTANEOUSLY PROVIDES A GAS SEAL AND REDUCES THE TRANSMISSION TO THE SKIRT OF STRESSES DUE TO BENDING OR DIMENSIONAL CHANGES IN THE CROWN ASSEMBLY AND FURTHER CHARACTERIZED IN THAT THE OUTER CROWN MEMBER IS FORMED ON ITS
References Cited (Backward Citations)
US1329822A
Cited
US1245641A
Cited
US1518986A
Cited
US1603611A
Cited
US2059713A
Cited
US2064371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |