US3232348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary wing aircraft
Assignee: Bolkow GmbH
•
Filing: 1963-10-15
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Granted: 1966-02-01
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Expires: 1983-10-15
Abstract
No abstract record available.
Inventors
- 👤 Jarosch Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:22
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A BLADE DISPOSITION CONTROL DEVICE FOR A ROTARY WING AIRCRAFT, COMPRISING A ROTATABLE ROTOR HEAD, A BLADE MOUNTED ON SAID HEAD FOR ROTATION THEREWITH ABOUT A ROTOR AXIS WHICH IS NORMALLY SUBSTANITALLY VERTICAL, MEANS MOUNTING SAID BLADE ON SAID ROTOR HEAD DEFINING A LEADLAG AXIS SPACED RADIALLY FROM THE ROTOR AXIS FOR PIVOTAL LEAD-LAG MOVEMENT OF SAID BLADE IN ADDITION TO ITS ROTATION ALONG WITH ROTATION WITH SAID ROTOR, SAID MOUNTING MEANS FORMING A LEAD-LAG PIVOTING AXIS EXTENDING AT AN ANGLE OF APPROXIMATELY BETWEEN 30 AND 60* IN RESPECT TO THE AXIS OF ROTATION OF SAID ROTOR HEAD, SAID BLADE ALSO BEING PIVOTAL ABOUT ITS OWN LONGITUDINAL AXIS, AND BLADE PITCH ADJUSTING MEANS CONNECTED TO SAID BLADE FOR PIVOTING SAID BLADE ABOUT ITS OWN LONGITUDINAL AXIS TO OBTAIN A PITCH ADJUSTING MOVEMENT, SAID BLADE PITCH ADJUSTING MEANS BEING INDEPENDENT OF THE LEAD-LAG MOVEMET OF SAID BLADE, SAID MEANS MOUNTING SAID BLADE ON SAID ROTOR HEAD BEING ADJUSTABLE FOR CHANGING THE LEAD-LAG PIVOTING AXIS.
Claim 2
Dependent Claim
163 words
A BLADE DISPOSITION CONTROL DEVICE FOR A ROTARY WING AIRCRAFT, COMPRISING A ROTATABLE ROTOR HEAD, A BLADE MOUNTED ON SAID HEAD FOR ROTATION THEREWITH ABOUT A ROTOR AXIS WHICH IS NORMALLY SUBSTANITALLY VERTICAL, MEANS MOUNTING SAID BLADE ON SAID ROTOR HEAD DEFINING A LEADLAG AXIS SPACED RADIALLY FROM THE ROTOR AXIS FOR PIVOTAL LEAD-LAG MOVEMENT OF SAID BLADE IN ADDITION TO ITS ROTATION ALONG WITH ROTATION WITH SAID ROTOR, SAID MOUNTING MEANS FORMING A LEAD-LAG PIVOTING AXIS EXTENDING AT AN ANGLE OF APPROXIMATELY BETWEEN 30 AND 60* IN RESPECT TO THE AXIS OF ROTATION OF SAID ROTOR HEAD, SAID BLADE ALSO BEING PIVOTAL ABOUT ITS OWN LONGITUDINAL AXIS, AND BLADE PITCH ADJUSTING MEANS CONNECTED TO SAID BLADE FOR PIVOTING SAID BLADE ABOUT ITS OWN LONGITUDINAL AXIS TO OBTAIN A PITCH ADJUSTING MOVEMENT, SAID BLADE PITCH ADJUSTING MEANS BEING INDEPENDENT OF THE LEAD-LAG MOVEMET OF SAID BLADE, SAID MEANS MOUNTING SAID BLADE ON SAID ROTOR HEAD BEING ADJUSTABLE FOR CHANGING THE LEAD-LAG PIVOTING AXIS.
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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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |