Patent ID: 7887133

Claim:
A standing wheelchair including a chassis onto which two drive wheels and at least one steerable wheel are attached, the standing wheelchair comprising: a seat; a backrest positioned at a back end of the seat; at least one foot support positioned generally forward of and below the seat; and an uplift unit coupled to the seat, the backrest and the foot support, the uplift unit configured to raise and lower the seat and provide coordinated movement of the foot support, wherein the uplift unit supports the seat by an upper longitudinal track connected to and positioned below the seat, the upper track including front and back hinge points, a lower longitudinal track connected to and positioned below the upper track, the lower track including front and back hinge points and front and back guides, the front guide attached to the upper and lower track front hinge points and the back guide attached to the upper and lower track back hinge points, forming a parallelogram, and a hub unit connected to the parallelogram formed by the upper and lower tracks and front and back guides, the hub unit moving the parallelogram upwards and rearward for adjustment of the seat height, without significant changes to an incline angle of the seat or the relative position of the upper and lower tracks.