US3223359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter flight control system
Assignee: Fairchild Hiller Corp
•
Filing: 1964-03-19
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Granted: 1965-12-14
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Expires: 1984-03-19
Abstract
No abstract record available.
Inventors
- 👤 Stanley L Quick
- 👤 Everett W Opdahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:47
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/02; B64C39/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A HELICOPTER HAVING A ROTOR MEANS COMPRISING: MEANS FOR DRIVING SAID ROTOR, MEANS CONNECTED TO SAID DRIVING MEANS FOR CONTROLLING THE ATTITUDE OF THE HELICOPTER ABOUT AN AXIS GENERALLY TRANSVERSE TO THE YAW AXIS OF THE HELICOPTER, MEANS RESPONSIVE TO THE DEVIATION OF THE HELICOPTER IN YAW FROM A PREDETERMINE REFERENCE POSITION FOR PRODUCING A CONTROL SIGNAL REPRESENTATIVE THEREOF,
Claim 2
Dependent Claim
59 words
A HELICOPTER HAVING A ROTOR MEANS COMPRISING: MEANS FOR DRIVING SAID ROTOR, MEANS CONNECTED TO SAID DRIVING MEANS FOR CONTROLLING THE ATTITUDE OF THE HELICOPTER ABOUT AN AXIS GENERALLY TRANSVERSE TO THE YAW AXIS OF THE HELICOPTER, MEANS RESPONSIVE TO THE DEVIATION OF THE HELICOPTER IN YAW FROM A PREDETERMINE REFERENCE POSITION FOR PRODUCING A CONTROL SIGNAL REPRESENTATIVE THEREOF,
References Cited (Backward Citations)
US3126966A
Cited
US2635836A
Cited
US2643354A
Cited
US3002711A
Cited
GB897756A
Cited
US3053480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |