Helicopter rotor

Details Helicopter rotor Helicopter rotor

2009-08-13

2011-12-13

Ellis, Christopher P (Department: 3644)

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

C244S017110, C416S13400R

Reexamination Certificate

active

08074921

ABSTRACT:
A rotor for a helicopter, the rotor having a drive shaft rotating about a first axis; a hub connected functionally to the drive shaft in angularly fixed manner with respect to the first axis and in rotary manner with respect to a second axis crosswise to the first axis; and two blades connected to the hub in angularly fixed manner with respect to the first and second axis and in rotary manner with respect to respective third axes; the rotor also having supporting means for supporting the blades with respect to the hub in rotary manner about the respective third axes; the supporting means having at least one supporting member made at least partly of elastomeric material and interposed between a first surface and a second surface integral with a respective blade and the hub respectively; and the supporting member deforming, in use, to permit rotation of the blade, with respect to the hub, about the respective third axis.

REFERENCES:
patent: 4886419 (1989-12-01), McCafferty
patent: 5131604 (1992-07-01), Yoerkie et al.
patent: 5330322 (1994-07-01), Aubry
patent: 5738494 (1998-04-01), Schmaling
patent: 6287076 (2001-11-01), Mouille
patent: 6929215 (2005-08-01), Arlton
patent: 2002/0136636 (2002-09-01), Sehgal et al.
patent: 2009/0084891 (2009-04-01), Darrow et al.
patent: 2010/0163668 (2010-07-01), Nannoni et al.
patent: 2775951 (1999-09-01), None
Search Report in European Application No. 08425564 dated Jan. 13, 2009.

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