Patent US1633581A successfully refreshed from Google Patents.
US3216675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft propulsion power plants
Assignee: Bristol Siddeley Engines Ltd
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Filing: 1963-12-26
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Granted: 1965-11-09
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Expires: 1983-12-26
Abstract
No abstract record available.
Inventors
- 👤 Snell Leonard Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:01
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
212 words
AN AIRCRAFT POWER PLANT COMPRISING TWO TURBOJET ENGINES, EACH INCLUDING A COMPRESSOR SECTION AND A TURBINE SECTION COAXIALLY ARRANGED, THE ENGINES BEING DISPOSED CLOSE TOGETHER, WITH THEIR AXES EXTENDING SUBSTANTIALLY FORE AND AFT, AND WITH THEIR LENGTHS AT LEAST PARTLY OVERLAPPING, A COMMON HOUSING CLOSELY SURROUNDING THE ENGINES AND HAVING AN OUTER SURFACE WHICH, DURING FORWARD FLIGHT, WILL BE SWEPT BY RELATIVE AIRFLOW SUBSTANTIALLY IN THE FORE AND AFT DIRECTION, A FRONT AND A REAR PAIR OF JET PROPULSION NOZZLES, EACH PAIR PENETRATING THE HOUSING OUTER SURFACE WITH THE PROPULSION NOZZLES OF EACH PAIR HAVING EACH A RESPECTIVE DISCHARGE OUTLET ADJACENT TO THE HOUSING OUTER SURFACE ON OPPOSITE SIDES OF A PLANE THROUGH THE HOUSING WHICH WILL BE VERTICAL AND FORE AND AFT DURING TAKE-OFF AND FORWARD FLIGHT, EACH NOZZLE HAVING FIRST AND SECOND SEPARATE FLOW PASSAGES, FIRST MEANS CONNECTING THE COMPRESSOR SECTION OF ONE OF THE ENGINES TO THE FIRST FLOW OF PASSAGE OF EACH FRONT NOZZLE AND THE COMPRESSOR SECTION OF THE OTHER OF THE ENGINES TO THE SECOND FLOW PASSAGE OF EACH FRONT NOZZLE, AND MEANS CONNECTING THE TURBINE SECTION OF ONE ENGINE TO THE FIRST FLOW PASSAGE OF EACH REAR NOZZLE AND THE TURBINE SECTION OF THE OTHER ENGINE TO THE SECOND FLOW PASSAGE OF EACH REAR NOZZLE.
Claim 2
Dependent Claim
212 words
AN AIRCRAFT POWER PLANT COMPRISING TWO TURBOJET ENGINES, EACH INCLUDING A COMPRESSOR SECTION AND A TURBINE SECTION COAXIALLY ARRANGED, THE ENGINES BEING DISPOSED CLOSE TOGETHER, WITH THEIR AXES EXTENDING SUBSTANTIALLY FORE AND AFT, AND WITH THEIR LENGTHS AT LEAST PARTLY OVERLAPPING, A COMMON HOUSING CLOSELY SURROUNDING THE ENGINES AND HAVING AN OUTER SURFACE WHICH, DURING FORWARD FLIGHT, WILL BE SWEPT BY RELATIVE AIRFLOW SUBSTANTIALLY IN THE FORE AND AFT DIRECTION, A FRONT AND A REAR PAIR OF JET PROPULSION NOZZLES, EACH PAIR PENETRATING THE HOUSING OUTER SURFACE WITH THE PROPULSION NOZZLES OF EACH PAIR HAVING EACH A RESPECTIVE DISCHARGE OUTLET ADJACENT TO THE HOUSING OUTER SURFACE ON OPPOSITE SIDES OF A PLANE THROUGH THE HOUSING WHICH WILL BE VERTICAL AND FORE AND AFT DURING TAKE-OFF AND FORWARD FLIGHT, EACH NOZZLE HAVING FIRST AND SECOND SEPARATE FLOW PASSAGES, FIRST MEANS CONNECTING THE COMPRESSOR SECTION OF ONE OF THE ENGINES TO THE FIRST FLOW OF PASSAGE OF EACH FRONT NOZZLE AND THE COMPRESSOR SECTION OF THE OTHER OF THE ENGINES TO THE SECOND FLOW PASSAGE OF EACH FRONT NOZZLE, AND MEANS CONNECTING THE TURBINE SECTION OF ONE ENGINE TO THE FIRST FLOW PASSAGE OF EACH REAR NOZZLE AND THE TURBINE SECTION OF THE OTHER ENGINE TO THE SECOND FLOW PASSAGE OF EACH REAR NOZZLE.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |