A - Human Necessities – 61 – G
Patent
A - Human Necessities
61
G
155/14.2
A61G 5/04 (2006.01)
Patent
CA 1147250
IN THE UNITED STATES PATENT AND TRADEMARK OFFICE APPLICATION OF CHARLES MACKINTOSH FOR POWER OPERATED WHEELCHAIR ABSTRACT OF THE DISCLOSURE A wheelchair assembly includes an occupant seat having a central shaft for mounting the seat on an under- carriage for universal tilting movement,for vertical move- ment along the shaft axis and for rotation about such axis. the undercarriage has a plurality of ground engaging wheels driven together by a driving mechanism which includes a drive motor and steered together by a steering mechanism which includes a steering motor. The steering motor may be operatively connected with both the seat and the wheels for turning them together by operation of a control assem- bly, or the steering motor may be operatively connected with only the seat or with only the wheels for independent operation. otherwise, the steering mechanism may couple the seat with the wheels while the steering motor is dis- connected so that wheel steering may be operated by a manual turning of the seat. An analyzer assembly compares the direction of travel chosen by the seat occupant to the actu- al orientation of the wheels and then directs the steering motor to align the wheels to the direction chosen, without turning the chair. And, the seat is automatically tilted toward a direction opposite that to which, it tends to lean when the wheelchair moves up an incline or down a decline.
360847
Fincham Eric
Mackintosh Charles
LandOfFree
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