Foldable wheel

A foldable wheel defined about an axis of rotation of the wheel, the foldable wheel comprising a closed loop having at least two consecutive links, each consecutive link being substantially in the form of a ring sector of section as defined in a plane that is substantially perpendicular to said axis of rotation of the wheel that presents substantially the shape of a trapezoid, thus comprising two non-parallel faces, a major base, and a minor base, means for mounting two consecutive links to pivot relative to each other about a link pivot axis, the facing two non-parallel faces belonging respectively to two consecutive links being defined in such a manner that, when they are not in contact with each other, they form a V-shape of apex directed towards the two major bases, the V-shape having an angle at the apex of value that is not zero, and when they are in contact with each other, they form a V-shape with an angle at the apex of zero value, said link pivot axis being situated substantially at the apex of a said V-shape and being parallel to said axis of rotation of the wheel, wherein the means for mounting two said consecutive links to pivot relative to each other are constituted by:

• a bearing comprising two portions, respectively a male bearing portion forming a pivot pin on the link pivot axis and a female bearing portion forming a pivot housing, said pivot pin being pivotally mounted in said pivot housing;
• and
• means for mounting said male and female bearing portions respectively at two points belonging respectively to two consecutive links and situated in the proximity of the apex of said V-shape.