Patent ID: 7134678

Claim:
A wheelchair comprising: a frame which supports a pair of wheels, a seat, and a backrest; the seat in the backrest being adjustable in relation to one another; the frame comprising of lower frame section with the wheels of the wheelchair and an upper frame section with the seat and backrest; an adjustment device which vertically adjusts the upper frame section in relation to the lower frame section and adjust the seating angle; the adjustment device including the first series of adjustment positions which adjusts a connection point between the upper and the lower frame sections and adjusts the height of the wheelchair; and the adjustment positions having uniform mutual spacing in the vertical direction, mutual spacing in the horizontal direction chosen such that a seating angle is kept constant at a new vertical adjustment position while the adjustment device is otherwise unaffected, wherein the adjustment device includes at least one stay which, at its ends, is connected to the upper frame section and to the lower frame section.