US3137019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing piston rings having curved cylinder bearing faces
Assignee: Goetzewerke Friedrich Goetze AG
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Filing: 1962-01-18
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Granted: 1964-06-16
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Expires: 1982-01-18
Abstract
No abstract record available.
Inventors
- 👤 Bornefeld Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:39
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/08; B24B19/11
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
A DEVICE FOR HONING THE CYLINDER BEARING FACES OF PISTON RINGS SO AS TO IMPART THERETO A CURVED CONFIGURATION, COMPRISING A HOLDER FOR HOLDING A SPLIT PISTON RING WHICH IS TO BE HONED, A HONING CYLINDER FOR RECEIVING THE PISTON RING HELD BY SAID HOLDER, SAID HONING CYLINDER HAVING A BORE PROVIDED WITH A RADIALLY DIRECTED ANNUALARY EXTENDING HONING GROOVE OF AN AXIAL WIDTH GREATER THAN THE CORRESPONDING WIDTH OF THE RING, AND MEANS FOR AXIALLY RECIPROCATING SAID HOLDER WITH SAID SPLIT PISTON RING WITH RESPECT TO SAID HONING GROOVE, WHEREBY SAID SPLIT PISTION RING IS CAUSED TO PASS ALONG SAID GROOVE SPANNING A PORTION OF THE LATTER IN RUBBING RESILIENT PRESSURE ENGAGEMENT WITH THE FLANKS THEREOF TO IMPART TO THE CYLINDER BEARING FACE THE DESIRED CURVED CONFIGURATION.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |