Tail rotor hub

Details Tail rotor hub Tail rotor hub

2011-04-19

2011-04-19

Michener, Joshua J (Department: 3644)

Aeronautics and astronautics

Aircraft, heavier-than-air

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

C416S13400R, C416S138000

Reexamination Certificate

active

07926759

ABSTRACT:
A tail rotor hub system and methods are disclosed. In one embodiment, the system includes a helicopter fuselage connected to a tail rotor assembly that holds tail blades. The assembly includes an elongated tail rotor housing and an elongated blade root fitting that rotates within the housing. A tension torsion strap is connected at one end to the housing and is connected at its other end to the blade root fitting to hold the blade root fitting in the housing when the housing rotates. Coupled between outside walls of the blade root fitting and inside walls of the housing are self lubricating bearings to enable the blade root fitting to rotate within the housing to change the pitch of the tail blades.

REFERENCES:
patent: 2534353 (1950-12-01), Hiller, Jr et al.
patent: 4281966 (1981-08-01), Duret et al.
patent: 5383767 (1995-01-01), Aubry
patent: 5415525 (1995-05-01), Desjardins et al.
patent: 5431540 (1995-07-01), Doolin et al.

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