Helicopter rotors
US4307996A · kind A · utility
6Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1979 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Nov 7, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/33
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A helicopter rotor has at least one pair of diametrically opposed rotor blades interconnected by a strap member flexible in torsion and in a plane perpendicular to a plane of rotation and stiff in a plane coincident with the plane of rotation. A torsionally flexible tie-bar having a tensile elastic modulus greater than that of the strap member is extended between pivotal attachments adjacent opposed ends of the interconnecting strap member. In operation, a major portion of centrifugal loads caused by the rotating blades is carried by the tie-bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.