Yoke with notched arm roots

Details Yoke with notched arm roots Yoke with notched arm roots

2007-05-14

2011-11-01

Palo, Francis T (Department: 3644)

Aeronautics and astronautics

Aircraft, heavier-than-air

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

Reexamination Certificate

active

08047466

ABSTRACT:
A yoke for a rotary wing aircraft rotor system has a plurality of arms, each arm having a root. Each root has a notched portion configured to allow passage of a portion of a blade-pitch control system through the notched portion.

REFERENCES:
patent: 4427340 (1984-01-01), Metzger et al.
patent: 5059094 (1991-10-01), Robinson et al.
patent: 5263821 (1993-11-01), Noehren et al.
patent: 6824096 (2004-11-01), Zoppitelli et al.
patent: 2006/0067822 (2006-03-01), D'Anna
patent: 2009/0179107 (2009-07-01), Stamps et al.
patent: 0097885 (1984-01-01), None
First Office Action from CN counterpart Application No. 200780017263.1, issued by the Patent Office of China on Nov. 5, 2010.
Canadian Office Action from CA counterpart Application No. 2650355, issued by the CA Intellectual Property Office on Feb. 25, 2011.
Japanese Office Action from JP counterpart Application No. 2009-509891, issued by the JP Patent Office Jun. 17, 2011.

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