US3231220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driven rotor-wing system for aircraft
Assignee: Individual
•
Filing: 1964-03-10
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Granted: 1966-01-25
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Expires: 1984-03-10
Abstract
No abstract record available.
Inventors
- 👤 Hans W Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:54
CPC Classifications
F; F03; F03D; F03D3/00; F03D3/06; F03D3/062; F03D3/066; F03D3/067; F03D3/068; B; B64; B64C; B64C23/00; B64C23/005; B64C29/00; B64C29/0008; B64C29/0016; B64C39/00; B64C39/003; B64C39/008; F05; F05B; F05B2260/00; F05B2260/70; F05B2260/72; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/74
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
AN AIRCRAFT INCORPORTING A DRIVEN ROTOR-WING SYSTEM COMPRISING A ROTOR MOUNTABLE IN AN AIRCRAFT WITH ITS AXIS OF ROTATION SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF THE AIRCRAFT, AT LEAST ONE ROTOR BLADE ON SAID ROTOR PARALLEL TO SAID ROTOR AXIS, ROTOR HUBS MOUNTED IN SPACED RELATION LONGITUDINALLY ON SAID ROTOR, ARMS CONNECTING EACH END PORTION OF EACH ROTOR BLADE TO ONE OF SAID HUBS AND PIVOTABLE RELATIVE TO THE ROTOR AXIS TO VARY THE DISTANCE OF EACH BLADE FROM THE ROTOR AXIS, THE HUBS OF EACH ROTOR BEING MOUNTED ON AEROFOILS OF THE ARICRAFT SPACED ON OPPOSITE SIDES OF THE LONGITUDINAL AXIS OF THE AIRCRAFT IN A PLANE CONTAINING SAID HUBS AND SAID ROTOR AXIS.
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |