US3213766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light weight piston
Assignee: Ford Motor Co
•
Filing: 1964-03-20
•
Granted: 1965-10-26
•
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
2026-11-01 21:56
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/02; F02F3/04; F02F3/042; B; B22; B22D; B22D19/00; B22D19/0009; B22D19/0027; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/04; F05C2201/0433; F05C2201/0448
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A LIGHT WEIGHT PISTON FOR AN INTERNAL COMBUSTION ENGINE COMPRISING A HEAD PORTION HAVING AT LEAST ONE PISTON RING GROOVE AROUND ITS CIRCUMFERENCE, A PAIR OF PISTON PIN BOSSES INTERGRALLY CONNECTED TO SAID HEAD PORTION AND DEPENDING FROM DIAMETRICALLY OPPOSITE SIDES THEREOF, SAID HEAD PORTION AND SAID PISTON PIN BOSSES BEING FORMED FROM A LIGHT WEIGHT METAL HAVING A RELATIVELY HIGH COEFFICIENT OF THERMAL EXPANSION, AN INNER SKIRT FORMED FROM A MORE DENSE METAL HAVING A LOWER COEFFICIENT OF THERMAL EXPANSION, SAID INNER SKIRT EXTENDING COMPLETELY AROUND THE CIRCUMFERNECE OF SAID PISTON AND BEING EMBEDDED IN SAID PISTON PIN BOSSES, SAID INNER SKIRT BEING AXIALLY SPACED FROM SAID HEAD PORTION, AND SKIRT PADS FIXED TO SAID INNER SKIRT ON OPPOSITE SIDES OF SAID PISTON, AID SKIRT PADS BEING FORMED FROM THE SAME METAL AS SAID HEAD PORTION AND SAID PISTON PIN BOSSES, SAID SKIRT PADS BEING SEPARATED FROM SAID PISTON PIN BOSSES IN A CIRCUMFERENTIAL DIRECTION.
Claim 2
Dependent Claim
156 words
A LIGHT WEIGHT PISTON FOR AN INTERNAL COMBUSTION ENGINE COMPRISING A HEAD PORTION HAVING AT LEAST ONE PISTON RING GROOVE AROUND ITS CIRCUMFERENCE, A PAIR OF PISTON PIN BOSSES INTERGRALLY CONNECTED TO SAID HEAD PORTION AND DEPENDING FROM DIAMETRICALLY OPPOSITE SIDES THEREOF, SAID HEAD PORTION AND SAID PISTON PIN BOSSES BEING FORMED FROM A LIGHT WEIGHT METAL HAVING A RELATIVELY HIGH COEFFICIENT OF THERMAL EXPANSION, AN INNER SKIRT FORMED FROM A MORE DENSE METAL HAVING A LOWER COEFFICIENT OF THERMAL EXPANSION, SAID INNER SKIRT EXTENDING COMPLETELY AROUND THE CIRCUMFERNECE OF SAID PISTON AND BEING EMBEDDED IN SAID PISTON PIN BOSSES, SAID INNER SKIRT BEING AXIALLY SPACED FROM SAID HEAD PORTION, AND SKIRT PADS FIXED TO SAID INNER SKIRT ON OPPOSITE SIDES OF SAID PISTON, AID SKIRT PADS BEING FORMED FROM THE SAME METAL AS SAID HEAD PORTION AND SAID PISTON PIN BOSSES, SAID SKIRT PADS BEING SEPARATED FROM SAID PISTON PIN BOSSES IN A CIRCUMFERENTIAL DIRECTION.
References Cited (Backward Citations)
GB393076A
Cited
US2238087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |