Patent US3151868A successfully refreshed from Google Patents.
US3151868A
Expired / Lapsed
US
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Combined compression and oil ring assembly
Assignee: SPX Technologies Inc
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Filing: 1961-10-11
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Granted: 1964-10-06
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Expires: 1981-10-11
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Beck
- 👤 Lee H Saylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:34
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/06; F16J9/061; F16J9/063; F16J9/064; F16J9/066; F16J9/069; F16J9/12; F16J9/20; F16J9/203
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
148 words
IN A PISTON PROVIDED WITH A RING GROOVE HAVING TOP AND BOTTOM WALLS, A BACK WALL AND AN ANNULAR LEDGE PROJECTING RADIALLY OUTWARD FROM THE BACK WALL WITH UPPER AND UNDER SURFACES SPACED RESPECTIVELY FROM THE TOP AND BOTTOM WALLS OF THE RING GROOVE, THE COMBINATION COMPRISING A CYLINDER-ENGAGING COMPRESSION RING HAVING AN INNER PERIPHERAL PORTION THEREOF DISPOSED SLIDABLY BETWEEN SAID GROOVE TOP WALL AND SAID LEDGE UPPER SURFACE, A CYLINDER-ENGAGING OIL RAIL SEGMENT DISPOSED ADJACENT THE BOTTOM WALL OF SAID GROOVE, AND AN ANNULAR EXPANDERSPACER DISPOSED BETWEEN SAID COMPRESSION RING AND SAID OIL RAIL SEGMENT, SAID EXPANDER-SPACER COMPRISING A SERIES OF CIRCUMFERENTIALLY SPACED TOP AND BOTTOM U-SHAPED SPRING LOOPS AND A SERIES OF CIRCUMFERENTIALLY EXTENDING WALLS INDIVIDUALLY CONNECTING CIRCUMFERENTIALLY ADJACENT PAIRS OF SAID TOP AND BOTTOM LOOPS, SAID TOP AND BOTTOM U-SHAPED SPRING LOOPS EXTENDING RADIALLY INWARD FROM SAID CONNECTING WALLS BETWEEN SAID LEDGE AND SAID OIL
References Cited (Backward Citations)
US2917353A
Cited
US3024029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |