US3620022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thrust reverser for jet propulsion engines
Assignee: Rolls Royce PLC
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Filing: 1969-10-07
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Granted: 1971-11-16
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Expires: 1989-10-07
Abstract
Abstract A FAN THRUST REVERSE FOR A JET ENGINE HAS AN ANNULAR DEFLECTING GAP IN THE OUTER WALL OF THE FAN DUCT, AND HAS PIVOTALLY MOUNTED VANES AT THE DOWNSTREAM END OF THE DUCT, A RAM BEING PROVIDED TO CAUSE A HELICALLY MOVABLE WALL MEMBER TO COVER OR UNCOVER THE GAP WHILE ALSO CAUSING THE VANES TO UNBLOCK OR BLOCK THE FAN DUCT, RESPECTIVELY.
Inventors
- 👤 Richard D Beale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:45
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/54; F02K1/64; F02K1/70
Claims Analysis
Total Claims: 0
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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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |