Patent ID: 8746265

Claim:
Foldable seat for a rollator or a wheelchair, said seat comprising: a first rigid plate and a second rigid plate, said plates being adjacently connected along a longitudinal axis so as to be rotatably moveable around said longitudinal axis between an unfolded position, in which their plane surfaces are approximately aligned, and a folded position, in which their plane surfaces define an angle less than 180°, said plates being also configured so as to be pivotally connectable to a frame; a hinge pivotally connecting said first plate to said second plate, wherein said hinge comprises at least a first cylinder integral with said first plate, said first plate projecting over said first cylinder, at least a second cylinder integral with said second plate, said second plate projecting over said second cylinder, and a pivot pin extending through axial through-bores and/or apertures of said first and second cylinders, said pin defining said longitudinal axis; wherein said seat further comprises a locking/unlocking system configured to be actuated by hand by the user so as to lock, respectively unlock, said first and second plates into, respectively from, said unfolded position and/or said folded position, said locking/unlocking system being at least partially lodged inside said first and/or said second cylinder; wherein said locking/unlocking system comprises: a locking element integral in rotation with the first cylinder and lodged at least partially inside an axial aperture formed at a distal end of said first cylinder, said distal end being adjacent to a proximal end of said second cylinder, said locking element being urged by a spring means against said proximal end and comprising a projecting shape which is designed to mate with a corresponding notch formed in said proximal end; and an unlocking element configured to be actuated by hand by the user so as to move said locking element away from said proximal end till said projecting shape is positioned outside of said corresponding notch.