Patent US2928530A successfully refreshed from Google Patents.
Patent US3089666A successfully refreshed from Google Patents.
US3089666A
Expired / Lapsed
US
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Airplane having changeable thrust direction
Assignee: Boeing Co
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Filing: 1961-04-13
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Granted: 1963-05-14
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Expires: 1981-04-13
Abstract
No abstract record available.
Inventors
- 👤 Henry H W Quenzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:44
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0033; B64C9/00; B64C9/14; B64C9/22; B64C9/24; B64C9/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN AN AIRPLANE, A WING, AN ELONGATED BODY BELOW SAID WING, CONNECTED THERETO IN FIXED RELATIONSHIP AND HAVING ITS LENGTH EXTENDING FORE AND AFT, AND AT LEAST FOUR THRUST-PRODUCING UNITS CARRIED BY THE AIRPLANE AND OPERABLE TO EXERT SUBSTANTIALLY VERTICAL UPWARD THRUST THEREON, TWO OF SAID THRUST-PRODUCING UNITS BEING ARRANGED IN FOREAND-AFT ALIGNMENT, ONE BEING CARRIED BY THE FORWARD PORTION AND THE OTHER CARRIED BY THE AFT PORTION OF SAID BODY AND DISPOSED SUBSTANTIALLY CENTRALLY OF SAID BODY TRANSVERSELY OF THE AIRPLANE, SAID THRUST-PRODUCING UNIT CARRIED BY THE FORWARD PORTION OF SAID BODY BEING A PROPELLER UNIT, AND PIVOT MEANS MOUNTING SAID PROPELLER UNIT TO TILT
Claim 2
Dependent Claim
106 words
IN AN AIRPLANE, A WING, AN ELONGATED BODY BELOW SAID WING, CONNECTED THERETO IN FIXED RELATIONSHIP AND HAVING ITS LENGTH EXTENDING FORE AND AFT, AND AT LEAST FOUR THRUST-PRODUCING UNITS CARRIED BY THE AIRPLANE AND OPERABLE TO EXERT SUBSTANTIALLY VERTICAL UPWARD THRUST THEREON, TWO OF SAID THRUST-PRODUCING UNITS BEING ARRANGED IN FOREAND-AFT ALIGNMENT, ONE BEING CARRIED BY THE FORWARD PORTION AND THE OTHER CARRIED BY THE AFT PORTION OF SAID BODY AND DISPOSED SUBSTANTIALLY CENTRALLY OF SAID BODY TRANSVERSELY OF THE AIRPLANE, SAID THRUST-PRODUCING UNIT CARRIED BY THE FORWARD PORTION OF SAID BODY BEING A PROPELLER UNIT, AND PIVOT MEANS MOUNTING SAID PROPELLER UNIT TO TILT
References Cited (Backward Citations)
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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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |