Helicopter rotor

Details Helicopter rotor Helicopter rotor

2005-09-22

2010-12-14

Kershteyn, Igor (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

C416S13400R, C416S13200B, C416S135000, C416S141000

Reexamination Certificate

active

07850429

ABSTRACT:
There is described a rotor for a helicopter, having a hub rotating about a first axis; a number of blades projecting from the hub in respective longitudinal directions lying in a plane crosswise to the first axis, and each connected to the hub so as to be movable at least about a second axis crosswise to the first axis and to the relative longitudinal direction; and a number of damping devices for damping vibration of the helicopter, each interposed between a respective blade and the hub; each damping device has a plate member fixed, on one side, to the hub, elastically connected, on the opposite side, to the relative blade, and flexible, during movement of the blade, about a third axis coaxial with the second axis.

REFERENCES:
patent: 4012169 (1977-03-01), Mouille et al.
patent: 4257739 (1981-03-01), Covington et al.
patent: 4268222 (1981-05-01), Bernard
patent: 5110260 (1992-05-01), Byrnes et al.
patent: 5407325 (1995-04-01), Aubry et al.
patent: 28 27 320 (1980-01-01), None
patent: 1528226 (1978-10-01), None

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