Direction and speed control device for an electronic wheelchair

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control

Reexamination Certificate

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Details

C701S072000, C180S006500, C180S065800, C180S907000

Reexamination Certificate

active

07974753

ABSTRACT:
A direction and speed control device for an electronic wheelchair includes: a base member mounted on the electronic wheelchair; a manually operable pointing unit mounted on the base member and including a control stick pivotable relative to the base member; first and second three-axis g acceleration sensors, each generating a voltage output indicative of tilt of a respective one of the control stick and the base member in three orthogonal axes; and a control unit operable so as to process the voltage outputs of the first and second three-axis g acceleration sensors to generate corresponding control signals for controlling rotation direction and speed of a wheel unit of the electronic wheelchair.

REFERENCES:
patent: 4511825 (1985-04-01), Klimo
patent: 6615937 (2003-09-01), Richey et al.
patent: 7404463 (2008-07-01), Saiki et al.
patent: 2005/0195166 (2005-09-01), Cooper et al.
patent: 2006/0180368 (2006-08-01), Hsieh et al.
patent: WO-01/08922 (2001-02-01), None
Birlanga, Perez, “European Search Report” for EP 07 00 5658 as completed Aug. 13, 2007 (4 pages).

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