Antivibration supports for helicopter blades, and a helicopter r

Details Antivibration supports for helicopter blades, and a helicopter r Antivibration supports for helicopter blades, and a helicopter r

1994-07-29

1996-02-06

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

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

Including movement limit stop or damping means

416134A, 26714013, B63H 106

Patent

active

054891930

ABSTRACT:
The invention relates to an antivibration device comprising two rigid strength members that are parallel and perpendicular to a first axis Z, and at least one laminated element interposed between the two strength members, said laminated element being made up of alternating layers of a rigid material and of elastomer which are disposed perpendicularly to the first axis, said laminated element enabling the two strength members to move relative to each other along a second axis Y that is perpendicular to the first axis. According to the invention, the device further includes a hydraulic damper which presents at least two leakproof cavities that are deformable and that are interconnected by means of a narrow channel, the two leakproof cavities and the narrow channel being filled with a liquid, each leakproof cavity being defined, at least in part, by a deformable wall which is fixed to both of the strength members and which permits them to move relative to each other parallel to the second axis.

REFERENCES:
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patent: 4458888 (1984-07-01), Wolf et al.
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patent: 5263815 (1993-11-01), Brenner
Patent Abstracts of Japan; vol. 14, No. 209 (M-968) (4152) 27 Apr. 1990 & JP-A-02 046 336 (Toyo Tire & Rubber Co Ltd) 15 Feb. 1990; abstract.

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