Turbofan propulsion apparatus with silencer and operating method
Abstract
Abstract LOBED NOZZLE IS ATTACHED TO AFT END OF HOUSING SPACED AROUND TURBOFAN ENGINE, FAN AIR OF THE LATTER FLOWING THROUGH GAP BETWEEN HOUSING AND ENGINE CASING AND THEN THROUGH LOBE PASSAGES OF SAID NOZZLE, HOLLOW FRUSTOCONICAL INNER MEMBER IS DISPOSED WITHIN THE NOZZLE AND ATTACHED AT ITS BASE TO AFT END OF ENGINE CASING. PIPES ARE MOUNTED ON OUTER SIDE OF INNER MEMBER IN ROWS EXTENDING AXIALLY THEREOF AND RESPECTIVELY RADIALLY ALIGNED WITH LOBE PASSAGES, THE PIPES COMMUNICATING WITH INTERIOR OF INNER MEMBER SO THAT ENGINE EXHAUST GAS IS DISCHARGED THERETHROUGH INTO SAID LOBE PASSAGES, WHERE IT MIXES WITH FAN AIR. SLIPSTREAM AIR FLOWS BETWEEN NOZZLE LOBES AND THEN BETWEEN STREAMS OF COMBINED EXHAUST GAS AND FAN AIR ISSUING FROM THE LOBE PASSAGES.
Inventors
- 👤 Peter H Ellis
Bibliographic Details
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |