Patent ID: 8850658

Claim:
A castor suitable for running on a surface (Sd), the castor comprising: a casing ( 10 ) constituted by a molded part ( 11 ), said part comprising at least: a housing ( 13 ) suitable for receiving a pivot ( 14 ) defined on a first axis ( 15 ); and a bearing ( 16 ) for a rotary shaft, said bearing being defined on a second axis ( 17 ) that is substantially perpendicular to the first axis and substantially parallel to said surface (Sd), said bearing ( 16 ) being defined by a surface that is generally of right cylindrical shape defining an axial orifice; at least one wheel ( 20 ) suitable for making rolling contact with said surface (Sd); and a rotary shaft ( 30 ) mounted to co-operate in said bearing ( 16 ), with said wheel ( 20 ) being mounted in association with said rotary shaft, wherein the molded part ( 11 ) is made of at least first and second portions ( 101 , 102 ) made respectively of two materials of different flexibilities, the second portion ( 102 ) being the portion that is made of the material presenting the greater flexibility, and wherein the second portion ( 102 ) comprises first and second elements, the first element being disposed within the housing ( 13 ) and the second element being in the form of a wall and encircling the shaft so as to isolate the housing and the bearing from each other.