Patent US4492998A successfully refreshed from Google Patents.
Patent US3135335A successfully refreshed from Google Patents.
US3135335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter rotor system
Assignee: Lockheed Martin Corp
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Filing: 1962-12-31
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Granted: 1964-06-02
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Edward S Cruz
- 👤 Albert R Yackle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:09
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A HELICOPTER ROTOR SYSTEM COMPRISING: A ROTOR DRIVE SHAFT; A ROTOR HUB ATTACHED TO THE DRIVE SHAFT; CUFF MEMBERS PIVOTABLY ATTACHED TO THE HUB AND CARRYING BEARINGS AND PITCH CONTROL HORNS FOR BLADE PITCH CHANGE; NON-ARTICULATED ROTOR BLADES ATTACHED TO SAID CUFF MEMBERS; A ROTATABLY DRIVEN ROTOR CONTROL GYRO HAVING A GYRO HUB AND A PLURALITY OF WEIGHTED CROSS ARMS EXTENDING RADIALLY FROM THE GYRO HUB AND BEING IN ACUTE ANGLE RELATIONSHIP WITH THE RESPECTIVE BLADES; MEANS FOR SUPPORTING THE GYRO HUB ABOVE THE BLADES FOR UNIVERSAL TILTING MOVEMENT AND FOR VERTICAL MOVEMENT OF THE GYRO WITH RESPECT TO THE DRIVE SHAFT; LINKAGE MEANS DIRECTLY CONNECTING THE GYRO HUB AND THE PITCH CONTROL HORNS ON THE CUFF MEMBERS FOR CHANGING
Claim 2
Dependent Claim
120 words
A HELICOPTER ROTOR SYSTEM COMPRISING: A ROTOR DRIVE SHAFT; A ROTOR HUB ATTACHED TO THE DRIVE SHAFT; CUFF MEMBERS PIVOTABLY ATTACHED TO THE HUB AND CARRYING BEARINGS AND PITCH CONTROL HORNS FOR BLADE PITCH CHANGE; NON-ARTICULATED ROTOR BLADES ATTACHED TO SAID CUFF MEMBERS; A ROTATABLY DRIVEN ROTOR CONTROL GYRO HAVING A GYRO HUB AND A PLURALITY OF WEIGHTED CROSS ARMS EXTENDING RADIALLY FROM THE GYRO HUB AND BEING IN ACUTE ANGLE RELATIONSHIP WITH THE RESPECTIVE BLADES; MEANS FOR SUPPORTING THE GYRO HUB ABOVE THE BLADES FOR UNIVERSAL TILTING MOVEMENT AND FOR VERTICAL MOVEMENT OF THE GYRO WITH RESPECT TO THE DRIVE SHAFT; LINKAGE MEANS DIRECTLY CONNECTING THE GYRO HUB AND THE PITCH CONTROL HORNS ON THE CUFF MEMBERS FOR CHANGING
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |