US3099455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring assembly
Assignee: SKF Automotive Products Inc
•
Filing: 1960-09-19
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Granted: 1963-07-30
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Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 George C Mayfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:15
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/06; F16J9/061; F16J9/062; F16J9/063; F16J9/064; F16J9/066; F16J9/069; F16J9/12; F16J9/14; F16J9/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A PISTON RING ASSEMBLY, AN EXPANSIBLE AND CONTRACTIBLE PISTON RING ELEMENT COMPRISING, AN ANNULAR STRIP OF SPRING METAL HAVING IN PART A GENERALLY CHANNEL CROSS-SECTION FORMING A RING ELEMENT WITH CYLINDRICAL WALL PORTIONS AND INTEGRAL ANNULAR FLANGES, SAID CYLINDRICAL WALL PORTIONS COMPRISING A WEB PORTION DEFINING A SINUOUS STRIP OF METAL OF SUBSTANTIALLY CONSTANT CROSS-SECTION AND INCLUDING A SERIES OF SPACED APERTURES ADJACENT EACH FLANGE, THE EDGES OF THE APERTURES IN ONE SERIES OVERHANGING THE EDGES OF APERTURES IN THE OTHER SERIES TO DEFINE A PLURALITY OF OPPOSITELY INCLINED SPACED WEBS, THE RESPECTIVE WEBS EXTENDING BEYOND THE ADJACENT APERTURES WHEREBY TO PROVIDE A TRUSS-LIKE STRUCTURE OF UNIFORM BEAM STRENGTH IN ONE DIRECTION AND OF UNIFORM FLEXIBILITY IN ANOTHER DIRECTION.
Claim 2
Dependent Claim
120 words
IN A PISTON RING ASSEMBLY, AN EXPANSIBLE AND CONTRACTIBLE PISTON RING ELEMENT COMPRISING, AN ANNULAR STRIP OF SPRING METAL HAVING IN PART A GENERALLY CHANNEL CROSS-SECTION FORMING A RING ELEMENT WITH CYLINDRICAL WALL PORTIONS AND INTEGRAL ANNULAR FLANGES, SAID CYLINDRICAL WALL PORTIONS COMPRISING A WEB PORTION DEFINING A SINUOUS STRIP OF METAL OF SUBSTANTIALLY CONSTANT CROSS-SECTION AND INCLUDING A SERIES OF SPACED APERTURES ADJACENT EACH FLANGE, THE EDGES OF THE APERTURES IN ONE SERIES OVERHANGING THE EDGES OF APERTURES IN THE OTHER SERIES TO DEFINE A PLURALITY OF OPPOSITELY INCLINED SPACED WEBS, THE RESPECTIVE WEBS EXTENDING BEYOND THE ADJACENT APERTURES WHEREBY TO PROVIDE A TRUSS-LIKE STRUCTURE OF UNIFORM BEAM STRENGTH IN ONE DIRECTION AND OF UNIFORM FLEXIBILITY IN ANOTHER DIRECTION.
References Cited (Backward Citations)
US2220947A
Cited
US2290499A
Cited
US2713527A
Cited
US2722467A
Cited
US2779647A
Cited
US2917353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |