Rotary wing system
Abstract
Abstract A ROTARY WING SYSTEM FOR AIRCRAFT WHICH COMPRISES A RATATABLY MOUNTED HUB, AND A PLURALITY OF BLADES EACH CONNECTED TO THE HUB FOR ROTATION THEREWITH BY A RESPECTIVE BALL JOINT TO PERMIT MOVEMENT ABOUT THREE COORDINATE AXES INCLUDING THE LONGITUDINAL AXIS OF THE BLADE. BLADE PITCH CONTROL MEANS ROTATABLE WITH THE HUB IS CONNECTED TO THE BLADES TO HOLD EACH BLADE IN PREDETERMINED POSITION WITH RESPECT TO ITS LONGITUDINAL AXIS AS THE BLADES ARE ROTATED. THE BLADE PITCH CONTROL MEANS IS LONGITUDINALLY SPACED FROM THE HUB AND MOUNTED FOR RECIPROCABLE MOVEMENT IN A PLANE PARALLEL TO THE LONGITUDINAL AXIS OF THE HUB. THE BLADE PITCH CONTROL MEANS INCLUDES A LINKAGE CONNECTED TO EACH BLADE AT A POINT SPACED FROM THE BLADE''S BALL JOINT CONNECTION TO THE HUB AND SPACED FROM THE LONGITUDINAL AXIS OF THE BLADE.
Inventors
- 👤 Robert E Foote
Bibliographic Details
Claims Analysis
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |