Rotorcraft blade provided with a tiltable flap

Details Rotorcraft blade provided with a tiltable flap Rotorcraft blade provided with a tiltable flap

2006-10-24

2009-08-25

Nguyen, Ninh H (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

With means moving working fluid deflecting working member...

Reexamination Certificate

active

07578654

ABSTRACT:
A rotorcraft rotor blade (1) includes at least one tiltable trailing-edge flap (5), the flap (5) being suitable for pivoting about a virtual hinge axis (Y′) extending substantially along the span of the blade (1) and of the flap (5). The blade (1) is remarkable in that it is provided with at least one main ball joint (30) provided with an inner cage (32) together with a first pin (31) and an outer cage (33), the front portion (33′) of the outer cage (33) of the main ball joint (30) being connected to a linear actuator (10, 10′) arranged in the blade (1) and serving to pivot the flap (5), the first pin (31) of the main ball joint (30) being substantially perpendicular to the virtual hinge axis (Y′) about which the flap (5) pivots.

REFERENCES:
patent: 2776718 (1957-01-01), Zuck
patent: 2779555 (1957-01-01), Danielson
patent: 3140066 (1964-07-01), Sutton et al.
patent: 4470366 (1984-09-01), Williams
patent: 5320491 (1994-06-01), Coleman et al.
patent: 6454207 (2002-09-01), Yamakawa et al.
patent: 2002/0021964 (2002-02-01), Janker et al.
patent: 2 770 826 (1999-05-01), None

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