US3273655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Center body fivotally retractable rotor
Assignee: —
•
Filing: —
•
Granted: 1966-09-20
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Expires: 1983-09-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:13
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A AIRCRAFT, A LIFTING ROTOR HAVING MEANS FOR ROTATBLE MOUNTING ON THE AIRCRAFT AND BEING RETRACTABLE AND EXTENSIBLE IN FLIGHT, THE ROTOR COMPRISING: A HOLLOW CENTER BODY; A PLURALITY OF ROTOR BLADES MOUNTED TO ROTATE WITH SAID CENTER BODY AND BEING PIVOTAL TO SWING IN A PLANE SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF ROTATION OF THE CENTER BODY; AND MEANS OPERATIVELY CONNECTED TO SAID BLADES TO SWING THE BLADES SIMULTANEOUSLY AND SYNCHRONOUSLY IN A COMMON DIRECTION BETWEEN EXTENDED POSITIONS SUBSTANTIALLY RADIAL TO SAID CENTER BODY AND RETRACTED POSITIONS DISPOSED SUBSTANTIALLY CHORDALLY OF THE CENTER BODY, INDEPENDENT OF ROTATIONAL SPEED TO THE ROTOR.
Claim 2
Dependent Claim
103 words
IN A AIRCRAFT, A LIFTING ROTOR HAVING MEANS FOR ROTATBLE MOUNTING ON THE AIRCRAFT AND BEING RETRACTABLE AND EXTENSIBLE IN FLIGHT, THE ROTOR COMPRISING: A HOLLOW CENTER BODY; A PLURALITY OF ROTOR BLADES MOUNTED TO ROTATE WITH SAID CENTER BODY AND BEING PIVOTAL TO SWING IN A PLANE SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF ROTATION OF THE CENTER BODY; AND MEANS OPERATIVELY CONNECTED TO SAID BLADES TO SWING THE BLADES SIMULTANEOUSLY AND SYNCHRONOUSLY IN A COMMON DIRECTION BETWEEN EXTENDED POSITIONS SUBSTANTIALLY RADIAL TO SAID CENTER BODY AND RETRACTED POSITIONS DISPOSED SUBSTANTIALLY CHORDALLY OF THE CENTER BODY, INDEPENDENT OF ROTATIONAL SPEED TO THE ROTOR.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |