US3556673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor mounting
Assignee: Bolkow GmbH
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Filing: 1968-10-11
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Granted: 1971-01-19
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Expires: 1988-10-11
Abstract
Abstract A ROTOR FOR GYROPLANES HAVING ROTOR BLADES OF A TYPE WHICH ABSORB, BY THEIR MATERIAL STRUCTURE, THE FORCES FROM PIVOTAL (SWIVEL) OR BENDING (WOBBLE) MOMENTS, COMPRISES A JOINTLESS MOUNTING AT THE ROTOR HEAD HAVING MEANS AT ITS RADIAL OUTER END FOR MOUNTING EACH ROTOR BLADE. THE MOUNTING IS MADE UP OF A PLURALITY OF LAMINATED RUBBERMETAL BEARINGS HAVING A LAYER STRUCTURE ARRANGED SUBSTANTIALLY NORMAL TO THE MAXIMUM OCCURRING BEARING FORCE COMPONENTS OR THE RESULTANT OF SUCH COMPONENTS.
Inventors
- 👤 Ernst-Dieter Kilian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:08
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |