Multi-position wheelchair for handicapped people

A wheelchair for handicapped people or people of reduced mobility, with:

• a support chassis (1),
• a seat structure (2) that includes at least:
• a footrest (15),
• a seat (16),
• and a seat back (17),
• and lifting means (60) interposed between the chassis (1) and the seat structure (2), allowing a height change of the seat structure,
• wherein said wheelchair includes means to incline the seat structure (2) that are interposed between the chassis and the seat structure, and lifting means and that include at least:
• a base (65) that is attached to the chassis (1) and that oscillates around a more-or-less horizontal axis on which the lifting means are fitted,
• and an actuator (73) that is interposed between the base (65) and the chassis (1) and that is designed, by rotation of the base (65), to allow a slope change of the whole seat structure (2), independently of its configuration,
• and wherein the lifting means include at least:
• an articulated assembly with at least one polygon that is deformable (61) in a vertical plane, interposed between the seat structure and the base, which then forms one side of the deformable polygon,
• and a mechanical assistance means (70) designed, by deformation of the polygon (61), to allow the height change of the seat structure (2),
• the seat structure being articulated and including:
• support structures for the seat back (17), the seat (16) and the footrest (15), that are articulated in order to allow a slope change of the seat back in relation to the seat and a slope change of the footrest in relation to the seat,
• and at least one mechanical assistance means (23, 36, 53) designed to ensure an inclination change of the seat back in relation to the seat and a change of the footrest in relation to the seat,
• said seat structure further including a cross-member (19) that that is located in the rear region of the wheelchair and that forms one side of the deformable polygon (61) of the lifting means (60), and wherein:
• the articulated structure (20) to support the seat includes at least:
• a stringer (21) that is attached to the seat (16) and that is articulated toward the front on the rear cross-member (19),
• and a motor-driven telescopic actuator (23) that is articulated toward the front on the rear cross-member (19) and, to the rear on the stringer or an element (25) attached to the stringer, and that forms a mechanical assistance means for verticalization of the seat structure (2),
• the articulated structure (30) that supports the seat back (17) includes at least:
• an upright (31) that is attached to the seat back and that is articulated on the rear end of the stringer (21) or on an element attached to the stringer,
• and a seat back arm (35) that is articulated on the rear cross-member (19) and on the upright (31) or an element (32) attached to the upright,
• and the articulated structure (50) to support the footrest (15) includes at least:
• a leg-support segment (51) that is attached to the footrest and that is articulated on the rear cross-member (19),
• a leg-support arm (53) that is articulated firstly on the rear cross-member (19) and secondly on the leg-support segment (51).