US3271948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable area nozzles
Assignee: Bristol Siddeley Engines Ltd
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Filing: 1964-08-17
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Granted: 1966-09-13
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Expires: 1984-08-17
Abstract
No abstract record available.
Inventors
- 👤 John R D Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:44
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/002; B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0066; B64C9/00; B64C9/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A VARIABLE AREA JET NOZZLE SYSTEM COMPRISING A NOZZLE HAVING AN OUTLET DEFINED BY A LIP, AND AN EXTERNAL VISOR FOR SELECTIVE PARTIAL BLANKING-OFF OF THE OUTLET, THE NOZZLE AND VISOR BEING CAPABLE OF RELATIVE ROTARY MOVEMENT ABOUT AN AXIS WHICH LIES TRANSVERSE TO THE DISCHARGE FROM THE OUTLET AND WHICH LIES UPSTREAM OF THE OUTLET, THE LIP THEREBY HAVING AN ARCUATE TRACK OF MOVEMENT RELATIVE TO THE VISOR, THE VISOR BEING SHAPED TO HAVE AN OPERATIVE EDGE WHICH BY THE RELATIVE MOVEMENT IS CARRIED BETWEEN AN INOPERATIVE POSITION CLEAR OF THE TRACK AND AN OPERATIVE POSITION EXTENDING FULLY ACROSS AND CLOSE TO AN END PORTION OF THE TRACK, AND THE VISOR HAVING A FLOW CONTROL SURFACE EXTENDING DOWNSTREAM FROM ITS OPERATIVE EDGE IN A DIRECTION AND FOR A SUFFICIENT DISTANCE TO CONSTITUTE AN IMPORTANT FACTOR IN DETERMINING THE DIRECTION OF THRUST OF THE SYSTEM WHEN THE NOZZLE OUTLET IS PARTIALLY BLANKEDOFF BY THE VISOR.
Claim 2
Dependent Claim
155 words
A VARIABLE AREA JET NOZZLE SYSTEM COMPRISING A NOZZLE HAVING AN OUTLET DEFINED BY A LIP, AND AN EXTERNAL VISOR FOR SELECTIVE PARTIAL BLANKING-OFF OF THE OUTLET, THE NOZZLE AND VISOR BEING CAPABLE OF RELATIVE ROTARY MOVEMENT ABOUT AN AXIS WHICH LIES TRANSVERSE TO THE DISCHARGE FROM THE OUTLET AND WHICH LIES UPSTREAM OF THE OUTLET, THE LIP THEREBY HAVING AN ARCUATE TRACK OF MOVEMENT RELATIVE TO THE VISOR, THE VISOR BEING SHAPED TO HAVE AN OPERATIVE EDGE WHICH BY THE RELATIVE MOVEMENT IS CARRIED BETWEEN AN INOPERATIVE POSITION CLEAR OF THE TRACK AND AN OPERATIVE POSITION EXTENDING FULLY ACROSS AND CLOSE TO AN END PORTION OF THE TRACK, AND THE VISOR HAVING A FLOW CONTROL SURFACE EXTENDING DOWNSTREAM FROM ITS OPERATIVE EDGE IN A DIRECTION AND FOR A SUFFICIENT DISTANCE TO CONSTITUTE AN IMPORTANT FACTOR IN DETERMINING THE DIRECTION OF THRUST OF THE SYSTEM WHEN THE NOZZLE OUTLET IS PARTIALLY BLANKEDOFF BY THE VISOR.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |