US3133739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring
Assignee: Ramsey Corp
•
Filing: 1960-06-06
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Granted: 1964-05-19
•
Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 Melvin W Marien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:58
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/26; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/939; Y10S277/941; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/937; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PISTON RING COMPRISING A SPLIT METAL ANNULUS BODY HAVING TOP AND BOTTOM SIDE WALLS FOR SEATING IN A RING GROOVE AND AN OUTER PERIPHERY FOR ENGAGING A CYLINDER WALL, SAID BODY BEING COMPOSED OF FERROUS METAL, SAID OUTER PERIPHERY HAVING A PERIPHERAL GROOVE THEREAROUND, A METAL BAND SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM AND ALUMINUM TRIOXIDE SECURED IN SAID GROOVE, SAID OUTER PERIPHERY HAVING A NARROW LAND AREA ADJACENT SAID BAND COMPOSED OF FERROUS METAL OF THE RING BODY AND PROVIDING A QUICK BREAK-IN SURFACE FOR THE RING, AND SAID BAND PROVIDING AN OIL RETAINING WERAR-RESISTING AND TEMPERATURE RESISTING BEARING FACE FOR THE RING BODY.
Claim 2
Dependent Claim
107 words
A PISTON RING COMPRISING A SPLIT METAL ANNULUS BODY HAVING TOP AND BOTTOM SIDE WALLS FOR SEATING IN A RING GROOVE AND AN OUTER PERIPHERY FOR ENGAGING A CYLINDER WALL, SAID BODY BEING COMPOSED OF FERROUS METAL, SAID OUTER PERIPHERY HAVING A PERIPHERAL GROOVE THEREAROUND, A METAL BAND SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM AND ALUMINUM TRIOXIDE SECURED IN SAID GROOVE, SAID OUTER PERIPHERY HAVING A NARROW LAND AREA ADJACENT SAID BAND COMPOSED OF FERROUS METAL OF THE RING BODY AND PROVIDING A QUICK BREAK-IN SURFACE FOR THE RING, AND SAID BAND PROVIDING AN OIL RETAINING WERAR-RESISTING AND TEMPERATURE RESISTING BEARING FACE FOR THE RING BODY.
References Cited (Backward Citations)
US2119035A
Cited
GB526707A
Cited
US2380654A
Cited
US2488697A
Cited
US2761749A
Cited
US2912292A
Cited
US2905512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |