Patent ID: 7845665
Filing Date: 2010-12-07
Classification: A61G

Abstract:
1. A wheelchair comprising: (a) a frame having a front portion with a seat hinge mounted thereto at a first elevation, and a rear portion rotatably coupled to left and right wheels; (b) a seat assembly comprising at least one side member hingedly coupled to the seat hinge, and a seat back hingedly coupled to the side member such that the seat back can be maintained at a substantially constant angle relative to the frame when the side member pivots about the seat hinge and moves the seat assembly between multiple elevations, (c) a lockable spring hingedly mounted to the frame and to the seat assembly, the spring being lockable at multiple positions thereby locking the seat assembly at the multiple elevations; (d) a seat bottom; and (e) an auxiliary member connecting the seat back to the seat bottom, in which the auxiliary member is operable to maintain the seat bottom at substantially the same angle to the seat back at each of the multiple elevations.