Rotary piston engine
Abstract
Abstract A ROTARY PISTON ENGINE HAS A HOUSING WITH A TROCHOIDAL SURFACE IN WHICH A ROTOR ROTATES, THE ROTOR HAVING SEALING STRIPS WHICH RUB AGAINST THE TROCHOIDAL SURFACE OF THE HOUSING AND BOTH THE TROCHOIDAL SURFACE AND THE RUBBING SURFACES OF THE STRIPS BEING COATED WITH ABRASION RESISTANT LAYERS OF ALUMINIUM OXIDE, ZIRCONIUM OXIDE OR CHROMIUM OXIDE. THE ABRASION RESISTANT LAYER ON THE TROCHOIDAL SURFACE IS FROM 0.2 TO 0.4 MM. THICK AND AN INTERMEDIATE LAYER OF A NICKEL IRON ALLOY OR A NICKEL CHROMIUM ALLOY OF FROM 5 TO 100U THICK IS INTERPOSED BETWEEN THIS ABRASION RESISTANT LAYER AND THE TROCHOIDAL SURFACE. THE ABRASION RESISTANT LAYERS ON THE SEALING STRIPS ARE MADE OF A MATERIAL OF SMALLER ABRASION RESISTANCE THAN THAT OF THE LAYER ON THE TROCHOIDAL SURFACE. IN THE APPLICATION OF THE INTERMEDIATE AND ABRASION RESISTANT LAYERS TO THE TROCHOIDAL SURFACE WHICH HAS INLET AND EXHAUST PORTS AND AN OPENING FOR A SPARKING PLUG, THE TROCHOIDAL SURFACE IS ROUGHENED MECHANICALLY, THE INTERMEDIATE LAYER IS APPLIED, A COATING IS APPLIED OVER THE SURFACES OF THE PORTS OF THE OPENING AND FINALLY THE ABRASION RESISTANT LAYER IS APPLIED BY FLAME SPRAYING.
Inventors
- 👤 Gerhard Zapf
- 👤 Jopg Niessen
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |