Patent ID: 7784815

Claim:
A stand-up wheelchair for disabled people and invalids, comprising a frame ( 2 ) supporting a hinged structure ( 12 ) supporting a seat back (D), a seat (A), a footrest (R) and being mobile between a seated position (P 1 ) and an upright position (P 2 ), characterised in that the hinged structure comprises: a hinged support system of the seat (A) and of the seat back (D) comprising: at least a deformable quadrilateral ( 13 ) which comprises at least: an upper side rail ( 14 , 15 ), a rear spacer ( 20 ) hinged at the rear by a pivot ( 21 , 22 ) on the upper side rail ( 14 , 15 ) and attached rigidly to an upright ( 24 , 25 ) contributing to support of the seat back (D), a front spacer ( 27 ) hinged at the front by a pivot ( 28 , 29 ) on the upper side rail ( 14 , 15 ) to be mobile in rotation relative to the frame ( 2 ) as far as a maximum rotation position defined by travel limitation means ( 55 ), and a lower side rail ( 35 ) which is hinged at the front by a pivot ( 36 ) on the front spacer ( 27 ) and at the rear by a pivot ( 37 ) on the rear spacer ( 20 ), the upper ( 14 , 15 ) or lower ( 35 ) side rail contributing to support of the seat and being hinged at the front on the frame ( 2 ) by a pivot to be mobile in rotation between the seated position (P 1 ) in which the upper side rail is supported on a seat bearing ( 52 , 53 ) carried by the frame ( 2 ) and the upright position (P 2 ), maneuvering means ( 50 ) which are interposed between the frame ( 2 ) and the rear spacer or the lower side rail and which are adapted, by displacement of either the upper or lower side rail to ensure adjustment of the inclination of the seat back upright ( 24 , 25 ) when the side rail hinged on the frame is supported on the seat bearing ( 52 , 53 ) and to bring upright the hinged structure ( 12 ) when the front spacer ( 27 ) has reached its maximum rotation position, and means ( 57 ) for stabilization of a maximum rotation position of the front spacer comprising a gas spring ( 57 ) hinged by pivots ( 58 , 59 ) on the frame ( 2 ) and the lower side rail ( 35 ) and the upper side rail ( 14 , 15 ) is hinged on the frame ( 2 ).