Patent 5244222 Issued on September 14, 1993. Estimated Expiration Date: May 2, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
This invention relates to a collapsible wheelchair (1) having a chassis (2) composed of two separate, lateral symmetrical sides (6) each including at least one virtually vertical upright bar (7), an upper arm (12), a lower arm (15) a carrying wheel (10) at the rear of the chassis and a guiding wheel (17) at the front of the chassis. The upper and lower arms (12, 15) are solid with the upright bar (7) and the lateral sides are only connected by the joint action of a seat (3) and a back (4), each including two rigid and symmetrical half-pieces (18, 28), articulated between each other following a median axis respectively of seat (3) and back (4).