US3198531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring
Assignee: Perfect Circle Corp
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Filing: 1962-01-19
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Granted: 1965-08-03
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Expires: 1982-01-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Brenneke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:40
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/20; F16J9/206; F16J9/203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
THE COMBINATION OF A PISTON HAVING AN ANNULAR PISTON RING GROOVE, AN INWARDLY EXTENDING ANNULAR UPPER CHANNEL FORMED IN THE BOTTOM OF SAID GROOVE AT THE UPPER SIDE THEREOF AND PROVIDING AN UPWARDLY FACING LEDGE, AN INWARDLY EXTENDING ANNULLAR LOWER CHANNEL FORMED IN THE BOTTOM OF SAID GROOVE AT THE LOWER SIDE THEREOF, AND A COMBINED COMPRESSION AND OIL RING MOUNTED IN SAID GROOVE AND COMPRESSION AND OIL RING MOUNTED IN SAID AN OIL RING PORTION INTEGRAL WITH EACH OTHER, THE COMPRESSION RING PORTION INTEGRAL WITH EACH OTHER, THE COMINTO SAID UPPER CHANNEL AND SAID OIL RING PORTION INCLUDING A PROJECTION WHICH EXTENDS INTO SAID LOWER CHANNEL, SAID PORTIONS RESPECTIVELY HAVING CYLINDER ENGAGING FACES AND SAID FACES OF SAID PORTIONS BEING AXIALLY SPACED FROM EACH OTHER, THE AXIAL THICKNESS OF SAID COMPRESSION RING PORTION BEING GREATER THAN THE AXIAL WIDTH OF SAID LOWER CHANNEL, WHEREBY SAID RING IS PREVENTED FROM BEING INSERTED IN SAID GROOVE UPSIDE-DOWN.
Claim 2
Dependent Claim
156 words
THE COMBINATION OF A PISTON HAVING AN ANNULAR PISTON RING GROOVE, AN INWARDLY EXTENDING ANNULAR UPPER CHANNEL FORMED IN THE BOTTOM OF SAID GROOVE AT THE UPPER SIDE THEREOF AND PROVIDING AN UPWARDLY FACING LEDGE, AN INWARDLY EXTENDING ANNULLAR LOWER CHANNEL FORMED IN THE BOTTOM OF SAID GROOVE AT THE LOWER SIDE THEREOF, AND A COMBINED COMPRESSION AND OIL RING MOUNTED IN SAID GROOVE AND COMPRESSION AND OIL RING MOUNTED IN SAID AN OIL RING PORTION INTEGRAL WITH EACH OTHER, THE COMPRESSION RING PORTION INTEGRAL WITH EACH OTHER, THE COMINTO SAID UPPER CHANNEL AND SAID OIL RING PORTION INCLUDING A PROJECTION WHICH EXTENDS INTO SAID LOWER CHANNEL, SAID PORTIONS RESPECTIVELY HAVING CYLINDER ENGAGING FACES AND SAID FACES OF SAID PORTIONS BEING AXIALLY SPACED FROM EACH OTHER, THE AXIAL THICKNESS OF SAID COMPRESSION RING PORTION BEING GREATER THAN THE AXIAL WIDTH OF SAID LOWER CHANNEL, WHEREBY SAID RING IS PREVENTED FROM BEING INSERTED IN SAID GROOVE UPSIDE-DOWN.
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |