US3259028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston
Assignee: Ford Motor Co
•
Filing: 1964-03-20
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Granted: 1966-07-05
•
Expires: 1984-03-20
Abstract
No abstract record available.
Inventors
- 👤 Frank C Hutto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:00
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/02; F02F3/04; F02F3/042; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/04; F05C2201/0433; F05C2201/0448
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
A LIGHTWEIGHT PISTON FOR AN INTERNAL COMBUSTION ENGINE COMPRISING A HEAD PORTION HAVING A PISTON RING BELT AREA, INTEGRAL PISTON PIN BOSSES DEPENDING FROM DIAMETRICALLY OPPOSITE SIDES OF SAID HEAD PORTION, SAID PISTON PIN BOSSES BEING SPACED RADIALLY INWARDLY FROM THE OUTER CIRCUMFERENCE OF SAID PISTON RING BELT AREA, SAID HEAD PORTION AND SAID PISTON PIN BOSSES BEING FORMED FROM A LIGHTWEIGHT METAL HAVING A HIGH COEFFICIENT OF THERMAL EXPANSION, A FIRST STRUT EMBEDDED IN ONE OF SAID PISTON PIN BOSSES, A SECOND STRUT EMBEDDED IN THE OTHER IN SAID PISTON PIN BOSSES, SAID STRUTS BEING FORMED FROM A MATERIAL HAVING A LOWER COEFFICIENT OF THERMAL EXPANSION THAN SAID HEAD PORTION, SAID STRUT HAVING PERFORATIONS IN THE OUTER
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |