Patent ID: 8870216

Claim:
A raising wheelchair comprising: a wheeled frame; and a raising system mounted to the frame and supporting a seat and a backrest, the raising system configured to be movable between a lowered position and a raised position, the raising system comprising; at least one double-armed lever including a first lever member comprising a first end and a second end and a second lever member comprising a first end and a second end; a coupling member fixedly mounted to the frame, wherein the first end of the first lever member and the first end of the second lever member are pivotally coupled to the coupling member; and a mechanism that is translationally coupled or pivotally coupled to the second end of the first lever member, that is pivotally coupled to the second end of the second lever member, and that is coupled to the backrest; wherein the raising system maintains an orientation of the backrest relative to the ground that is consistent throughout substantially an entire range of movement between the lowered position and the raised position.