High-torque gear assembly for personal mobility apparatus

Details High-torque gear assembly for personal mobility apparatus High-torque gear assembly for personal mobility apparatus

2006-02-02

2008-10-07

Ellis, Christopher (Department: 3618)

Motor vehicles

Power

Electric

C180S907000

Reexamination Certificate

active

07431110

ABSTRACT:
A high-torque gear assembly for a personal mobility apparatus is disclosed generally comprising a shaft that drives a drive wheel of the personal mobility apparatus, a worm driven by a motor, and a worm wheel coupled to the shaft and driven by the worm, where both the worm wheel is a globoid gear and the worm is a globoid worm. In some embodiments, a gear train is coupled between a gear shaft and a drive wheel shaft for translating the rotational motion. In certain embodiments, the worm wheel and the worm have a gear ratio of at least 10:1, and the worm has a lead angle between twenty and thirty degrees.

REFERENCES:
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patent: 5253724 (1993-10-01), Prior
patent: 6029763 (2000-02-01), Swisher
patent: 6345678 (2002-02-01), Chang
patent: 6415686 (2002-07-01), Milano, Jr.
patent: 6591785 (2003-07-01), Boshears
patent: 2004/0210351 (2004-10-01), Wakefield et al.

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