Patent US3289980A successfully refreshed from Google Patents.
US3289980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thrust system for vtol aircraft
Assignee: Lockheed Martin Corp
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Filing: 1964-12-07
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Granted: 1966-12-06
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Expires: 1984-12-07
Abstract
No abstract record available.
Inventors
- 👤 Hill Thomas Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:39
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0075
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A THRUST SYSTEM FOR VTOL AIRCRAFT COMPRISING A LIFT-PRODUCING DEVICE MOUNTED ON SAID AIRCRAFT FOR UNRESTRICTED MOVEMENT RELATIVE THERETO IN MULTIPLE DEGREES OF FREEDOM AND DISPOSED ABOVE THE CENTER OF GRAVITY OF THE AIRCRAFT WHEN THE AIRCRAFT IS IN A SUBSTANTIALLY HORIZONTAL POSITION WITH THE VECTOR SUM OF THE FORCES PRODUCED THEREBY PASSING VERTICALLY THROUGH THE CENTER OF GRAVITY OF THE AIRCRAFT, INCLUDING RELEASABLE ENGAGEMENT MEANS, OPERATIVE ON SAID DEVICE, TO HOLD IT IN A SELECTED, FIXED POSITION RELATIVE TO THE AIRCRAFT, WHEREBY SAID VECTOR SUM OF THE FORCES ARE DIRECTED AFTR OF SAID AIRCRAFT.
Claim 2
Dependent Claim
95 words
A THRUST SYSTEM FOR VTOL AIRCRAFT COMPRISING A LIFT-PRODUCING DEVICE MOUNTED ON SAID AIRCRAFT FOR UNRESTRICTED MOVEMENT RELATIVE THERETO IN MULTIPLE DEGREES OF FREEDOM AND DISPOSED ABOVE THE CENTER OF GRAVITY OF THE AIRCRAFT WHEN THE AIRCRAFT IS IN A SUBSTANTIALLY HORIZONTAL POSITION WITH THE VECTOR SUM OF THE FORCES PRODUCED THEREBY PASSING VERTICALLY THROUGH THE CENTER OF GRAVITY OF THE AIRCRAFT, INCLUDING RELEASABLE ENGAGEMENT MEANS, OPERATIVE ON SAID DEVICE, TO HOLD IT IN A SELECTED, FIXED POSITION RELATIVE TO THE AIRCRAFT, WHEREBY SAID VECTOR SUM OF THE FORCES ARE DIRECTED AFTR OF SAID AIRCRAFT.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |