Patent US3175619A successfully refreshed from Google Patents.
US3175619A
Expired / Lapsed
US
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Rotary wing aircraft
Assignee: North American Aviation Corp
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Filing: 1962-11-19
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Granted: 1965-03-30
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Expires: 1982-11-19
Abstract
No abstract record available.
Inventors
- 👤 Jr David A Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:42
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/32; F42B10/48; F42B10/58; B; B64; B64C; B64C27/00; B64C27/02; B64C27/021; B64C27/022; B64D; B64D1/00; B64D1/02; B64U; B64U10/00; B64U10/10; B64U10/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
FOR USE IN A ROTARY WING CRAFT HAVING BLADES MOUNTED ON A HUB FOR MOTION THROUGH VARIABLE PITCH AND CONE ANGLES MEANS FOR CONTROLLING PITCH ANGLE MOTION AND FLAP ANGLE MOTION OF EACH INDIVIDUAL BLADE TO CONTROL THRUST THEREON, SAID CONTROLLING MEANS COMPRISING INTERCONNECTED MEANS ON THE HUB AND BLADES, AND OPERATING MEANS MOUNTED ON THE HUB FOR ACTIVATING THE INTERCONNECTED MEANS, AND THRUST RESPONSIVE MEANS INDEPENDENT OF CONING OF THE BLADES FOR CONTROLLING THE OPERATING MEANS TO LIMIT THRUST ON THE BLADES.
Claim 2
Dependent Claim
83 words
FOR USE IN A ROTARY WING CRAFT HAVING BLADES MOUNTED ON A HUB FOR MOTION THROUGH VARIABLE PITCH AND CONE ANGLES MEANS FOR CONTROLLING PITCH ANGLE MOTION AND FLAP ANGLE MOTION OF EACH INDIVIDUAL BLADE TO CONTROL THRUST THEREON, SAID CONTROLLING MEANS COMPRISING INTERCONNECTED MEANS ON THE HUB AND BLADES, AND OPERATING MEANS MOUNTED ON THE HUB FOR ACTIVATING THE INTERCONNECTED MEANS, AND THRUST RESPONSIVE MEANS INDEPENDENT OF CONING OF THE BLADES FOR CONTROLLING THE OPERATING MEANS TO LIMIT THRUST ON THE BLADES.
References Cited (Backward Citations)
GB272871A
Cited
US2519762A
Cited
US2611344A
Cited
US2721615A
Cited
US2595642A
Cited
US2643724A
Cited
US2627929A
Cited
US3016217A
Cited
US3017147A
Cited
US2990149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |