Oil scraping piston-ring assembly
Abstract
Abstract AN OIL SCRAPING PISTON-RING ASSEMBLY WHICH HAS ITS PISTON-RING INTERNAL SURFACE DISPOSED PREPENDICULAR TO THE UPPER OR LOWER SURFACE THEREOF OR INCLINED UPWARDLY OR DOWNWARDLY. A COMPRESSION ELEMENT OF STEEL STRIP MATERIAL HAS A PLURALITY OF OIL PASING SLITS AND IS FORMED INTO A RING HAVING A CROSS-SECTIONAL CONFIGURATION OF EITHER V OR L SHAPE. THE COMPRESSION ELEMENT HAS TWO PORTIONS, ONE RISING VERTICALLY OR OBLIQUELY AND THE OTHER EXTENDING OBLIQUELY OUTWARDLY OR HORIZONTALLY OUTWARDLY. WHEN THE PISTON-RING IS ASSEMBLED WITH THE COMPRESSION ELEMENT AND IS INSERTED IN A PISTON GROOVE, THE COMPRESSIVE FORCES BETWEEN THE SLIDING SURFACE OF THE OIL SCRAPING PISTONRING AND THE INSIDE SURFACE OF THE CYLINDER AND ALSO BETWEEN THE UPPER AND LOWER SURFACE OF THE PISTON GROOVE AND THE CORRESPONDING SURFACE OF THE PISTON-RING ARE GREATLY STRENGTHENED AND THE LEAKAGE OF THE LUBRICATING OIL THERETHROUGH INTO THE COMBUSTION CHAMBER IS SUBSTANTIALLY DECREASED.
Inventors
- 👤 Eisuke Sugahara
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |