Transmission mechanism between accessories and engine...

Details Transmission mechanism between accessories and engine... Transmission mechanism between accessories and engine...

2005-06-07

2008-09-02

Ho, Ha D. (Department: 3681)

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

C074S66500G, C244S015000

Reexamination Certificate

active

07418888

ABSTRACT:
A transmission mechanism between at least one accessory and engine members for driving the rotor of a rotorcraft, the transmission therebetween being selectively either in isolation or in combination. An intermediate shaft is interposed between a main drive shaft for the rotor and a secondary drive shaft for the accessory, for driving the accessory from an engine member allocated to driving it. This intermediate shaft engages directly on the main shaft and meshes with an accessory drive gear via freewheels to enable the gear to be driven either by the engine member or from the main shaft in the position for combined drive together with the rotor, the rotor being driven by the other engine member or autorotation in the event of both engine members failing.

REFERENCES:
patent: 3255825 (1966-06-01), Mouille et al.
patent: 4659286 (1987-04-01), Garavaglia et al.
patent: 4783023 (1988-11-01), Jupe
patent: 4811627 (1989-03-01), Mouille
patent: 5281099 (1994-01-01), Hunter et al.
patent: 5572910 (1996-11-01), Tomaselli et al.
patent: 5802918 (1998-09-01), Chen et al.
patent: 5853145 (1998-12-01), Carter, Jr.
patent: 6443035 (2002-09-01), Scardullo
AGARD Conference Proceedings No. 302 Helicopter Propulsion Systems.

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