US3247907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade folding mechanism for rotary wing aircraft
Assignee: Boeing Co
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Filing: 1963-09-18
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Granted: 1966-04-26
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Expires: 1983-09-18
Abstract
No abstract record available.
Inventors
- 👤 Victor S Mosinskis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:01
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473; B64C27/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A MECHANISM FOR FOLDING AND UNFOLDING ROTOR BLADE MEANS OF A ROTARY WING AIRCRAFT ABOUT A LEAD-LAG HINGE OF THE ROTOR BLADE MEANS COMPRISING ACTUATING MEANS HAVING A PLURALITY OF OUTPUTS, CONTROL MEANS FOR CAUSING FIRST OF SAID OUTPUTS TO BE OPERATIVE AND A SECOND OF SAID OUTPUTS TO BE INOPERATIVE WHEN SAID ROTOR BLADE MEANS IS IN ITS UNFOLDED POSITION, AND LOCKING MEANS FOR LOCKING SAID ROTOR BLADE MEANS WHEN SAID ROTOR BLADE MEANS IS IN ITS UNFOLDED POSITION TO PREVENT A CHANGE OF PITCH, SAID FIRST OUTPUT BEING CONNECTED TO SAID LOCKING MEANS TO MOVE SAID LOCKING MEANS TO ITS LOCKING POSITION, SAID ROTOR BLADE MEANS HAVING MEANS TO CONTROL THE LEAD-LAG MOVEMENTS OF SAID ROTOR BLADE MEANS ABOUT ITS LEAD-LAG
Claim 2
Dependent Claim
123 words
A MECHANISM FOR FOLDING AND UNFOLDING ROTOR BLADE MEANS OF A ROTARY WING AIRCRAFT ABOUT A LEAD-LAG HINGE OF THE ROTOR BLADE MEANS COMPRISING ACTUATING MEANS HAVING A PLURALITY OF OUTPUTS, CONTROL MEANS FOR CAUSING FIRST OF SAID OUTPUTS TO BE OPERATIVE AND A SECOND OF SAID OUTPUTS TO BE INOPERATIVE WHEN SAID ROTOR BLADE MEANS IS IN ITS UNFOLDED POSITION, AND LOCKING MEANS FOR LOCKING SAID ROTOR BLADE MEANS WHEN SAID ROTOR BLADE MEANS IS IN ITS UNFOLDED POSITION TO PREVENT A CHANGE OF PITCH, SAID FIRST OUTPUT BEING CONNECTED TO SAID LOCKING MEANS TO MOVE SAID LOCKING MEANS TO ITS LOCKING POSITION, SAID ROTOR BLADE MEANS HAVING MEANS TO CONTROL THE LEAD-LAG MOVEMENTS OF SAID ROTOR BLADE MEANS ABOUT ITS LEAD-LAG
References Cited (Backward Citations)
GB852841A
Cited
US3153455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |