Stand-up wheelchair

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 below the seat, the upper track including front and back hinge points,
• a lower longitudinal track connected to and 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 tracks and guides, the hub unit moving the parallelogram upwards and downwards for adjustment of the seat height, without significant changes to the relative position of the longitudinal tracks.