Pitch-control devices for hingeless rotors

Details Pitch-control devices for hingeless rotors Pitch-control devices for hingeless rotors

1995-10-05

1996-10-08

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Sustained ancillary movement of rotary working member

Responsive to fixed actuator

416134A, 416140, 416147, B64C 2733, B64C 2739

Patent

active

055624154

ABSTRACT:
For each blade, the cuff which is rigid in torsion, surrounding the corresponding rotor attachment twistable arm, bears two opposed pitch levers each articulated to one respectively of two intermediate connecting rods which are moreover articulated to one and the same transmission lever on either side of a pivoting link by means of which this lever pivots on a pivot secured to the rotor mast. The transmission lever is additionally articulated to the pitch-control rod at a point which is offset with respect to its pivoting link. A crossmember is articulated to the connecting rods and interacts with an assembly having a drag damper, this assembly itself being articulated to a fixed point secured in terms of rotation to the rotor mast.

REFERENCES:
patent: 2939535 (1960-06-01), Brye
patent: 3594097 (1971-07-01), Mouille et al.
patent: 4073600 (1978-02-01), Domar
patent: 4297080 (1981-10-01), Krauss et al.
patent: 4432696 (1984-02-01), Stephen et al.
patent: 4626173 (1986-12-01), Mouille et al.
patent: 4690616 (1987-09-01), Hahn et al.
patent: 4778340 (1988-10-01), Pariani
patent: 5100294 (1992-03-01), Crannage et al.

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