Patent ID: 7398989

Claim:
A stand-up wheelchair for handicapped and sick people, including a chassis ( 2 ) supporting an articulated structure ( 12 ) which includes, a seat ( 4 ), a foot-rest ( 33 ), a chair-back, and two symmetrical lateral articulated systems ( 13 ), each including: a first deformable polygon or quadrilateral ( 17 ) contributing to the support of the seat, composed of two bars, upper ( 18 ) and lower ( 19 ) respectively, articulated on the front part of the chassis ( 2 ) and connected to their rear parts by a distance piece ( 20 ), a second deformable polygon or quadrilateral ( 26 ), contributing to the support of the foot-rest, a chair-back frame ( 34 , 35 ) articulated on the first quadrilateral ( 17 ), opposite to the second quadrilateral ( 26 ), by means of the distance piece ( 20 ) at least, and a manoeuvring assembly ( 40 ), positioned between the first quadrilateral and the chassis, which includes a first lever ( 41 ) articulated on the rear part of the chassis ( 2 ) and, at the extremity of a second lever ( 43 ) whose other extremity is articulated on the first quadrilateral ( 17 ), as well as a manoeuvring handle ( 49 ) which performs a function of command and control for the relative pivoting of the lateral systems, from a lowering position to a raising position of the structure in relation to the chassis and vice versa, characterised in that, for each manoeuvring assembly, the manoeuvring handle ( 49 ) is articulated, firstly, on the second lever ( 43 ) and/or the first lever ( 41 ), and secondly on the first quadrilateral ( 17 ) by means of a connecting-rod ( 55 ) whose first extremity is connected by a pivot ( 56 ) to the first quadrilateral and whose second extremity is connected by a pivot ( 58 ) to the manoeuvring handle ( 49 ).