US3087691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft utilizing plural jet engines connectable to drive turbine driven lift rotors
Assignee: Bristol Siddeley Engines Ltd
•
Filing: 1961-11-24
•
Granted: 1963-04-30
•
Expires: 1981-11-24
Abstract
No abstract record available.
Inventors
- 👤 Rainbow Horace Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:32
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A VERTICAL TAKE-OFF AIRCRAFT INCLUDING A PLURALITY OF TURBINE ENGINES, EACH HAVING AN EFFLUENT PIPE AND A REARWARDLY-DIRECTED THRUST NOZZLE AT THE OUTLET OF SAID EFFLUENT PIPE; A FREE POWER TURBINE HAVING A PLURALITY OF SEPARATE ADMISSION SECTORS, CORRESPONDING IN NUMBER TO SAID TURBINE ENGINES AND TOGETHER FORMING A SUBSTANTIALLY COMPLETE ANNULUS; A DOWNWARDLY-DIRECTED EXHAUST OUTLET FROM SAID FREE POWER TURBINE; A SET OF ADJUSTABLE INLET GUIDE VANES IN EACH SECTOR OF SAID FREE POWER TURBINE; A BRANCH DUCT FOR DIVERTING GAS FROM EACH SAID EFFLUENT PIPE TO A RESPECTIVE ADMISSION SECTOR; MEANS FOR VARYING THE EFFECTIVE OUTLET AREA OF EACH OF SAID THRUST NOZZLES; AND MEANS FOR ADJUSTING SAID INLET GUIDE VANES OF EACH SET TO VARY THE EFFECTIVE AREA OF ADMISSION TO THE RESPECTIVE SECTORS OF SAID FREE POWER TURBINE; A DUCTED FAN ARRANGED TO PROVIDE A DOWNWARDLY-DIRECTED AIRSTREAM, AND DRIVE SHAFTING CONNECTING THE FREE POWER TURBINE TO THE DUCTED FAN.
Claim 2
Dependent Claim
153 words
A VERTICAL TAKE-OFF AIRCRAFT INCLUDING A PLURALITY OF TURBINE ENGINES, EACH HAVING AN EFFLUENT PIPE AND A REARWARDLY-DIRECTED THRUST NOZZLE AT THE OUTLET OF SAID EFFLUENT PIPE; A FREE POWER TURBINE HAVING A PLURALITY OF SEPARATE ADMISSION SECTORS, CORRESPONDING IN NUMBER TO SAID TURBINE ENGINES AND TOGETHER FORMING A SUBSTANTIALLY COMPLETE ANNULUS; A DOWNWARDLY-DIRECTED EXHAUST OUTLET FROM SAID FREE POWER TURBINE; A SET OF ADJUSTABLE INLET GUIDE VANES IN EACH SECTOR OF SAID FREE POWER TURBINE; A BRANCH DUCT FOR DIVERTING GAS FROM EACH SAID EFFLUENT PIPE TO A RESPECTIVE ADMISSION SECTOR; MEANS FOR VARYING THE EFFECTIVE OUTLET AREA OF EACH OF SAID THRUST NOZZLES; AND MEANS FOR ADJUSTING SAID INLET GUIDE VANES OF EACH SET TO VARY THE EFFECTIVE AREA OF ADMISSION TO THE RESPECTIVE SECTORS OF SAID FREE POWER TURBINE; A DUCTED FAN ARRANGED TO PROVIDE A DOWNWARDLY-DIRECTED AIRSTREAM, AND DRIVE SHAFTING CONNECTING THE FREE POWER TURBINE TO THE DUCTED FAN.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |