US3326561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring assembly
Assignee: Clevite Industries Inc
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Filing: 1964-06-29
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Granted: 1967-06-20
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Expires: 1984-06-29
Abstract
No abstract record available.
Inventors
- 👤 Helmuth G Braendel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:14
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/20; F16J9/203; F16J9/06; F16J9/061; F16J9/063
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
147 words
A COMPOSITE PISTON RING ASSEMBLY FOR USE IN AND WITH THE CYLINDER AND PISTON OF INTERNAL COMBUSTION ENGINES AND THE LIKE WHEREIN THE PISTON INCLUDES AN ANNULAR GROOVE, SAID PISTON RING ASSEMBLY COMPRISING A GENERALLY ANNULAR SPLIT RAIL, SAID RAIL HAVING A TOP SURFACE FOR ESTABLISHING INTIMATE CONTACT WITH THE TOP OF SAID PISTON GROOVE, AT LEAST ONE RADIALLY OUTWARDLY EXTENDING CIRCUMFERENTIAL PROJECTION ON SAID RAIL TERMINATING IN A CYLINDER WALL ENGAGING SURFACE, A RADIALLY INWARDLY EXTENDING CIRCUMFERENTIAL LIP ON SAID RAIL HAVING AS ONE OF ITS SIDES A PORTION OF SAID RAIL TOP SURFACE FOR ESTABLISHING INTIMATE CONTACT WITH THE TOP OF SAID PISTON GROOVE, SAID LIP HAVING AS THE OTHER OF ITS SIDES A DOWNWARDLY FACING PLANAR SURFACE, SAID RAIL FURTHER INCLUDING AN INWARDLY FACING ANNULAR SURFACE DISPOSED BENEATH SAID LIP AND SPACED RADIALLY OUTWARDLY FROM THE INWARD TERMINAL PORTION OF SAID LIP, SAID RESILIENT
References Cited (Backward Citations)
US3202430A
Cited
US3228704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |