Wheel device for skate board or rolller skate

Abstract

Disclosed is a wheel device for a skate board or a roller skate. A wheel includes a single central hub having an exterior wall and a bore for the housing of rollers, the rollers providing the connection with the hub of a truck; and a tread removably mounted on the exterior wall of the hub. A shoulder of the tread includes a first support face and a second support face, the two faces being parallel to each other and perpendicular to the common axis. The tread is locked in rotation and in axial position on the hub by means of locking screws, including heads abut against the second support face of the shoulder, the screws traversing the shoulder from side to side and attaching on the connecting means of the hub.

1 . A wheel device for skate board or roller skate comprising a wheel mounted on a truck, the aforementioned wheel comprising:
 a single central hub having an exterior wall and a bore for the housing of rollers, the aforementioned rollers providing the connection with the aforementioned hub of the aforementioned truck,   a tread removably mounted on the exterior wall of the aforementioned hub, the aforementioned hub, the aforementioned interior bore and the aforementioned tread having a common axis,   characterized by the fact that:   the tread has a bore provided with a shoulder forming a housing for the hub, the aforementioned shoulder comprising an interior wall radially positioning the exterior wall of the aforementioned hub,   the aforementioned shoulder comprising a first support face and a second support face, the aforementioned two faces being parallel to each other and perpendicular to the aforementioned common axis,   the aforementioned tread being locked in rotation and in axial position on the aforementioned hub by means of locking screws, which screws comprise heads which abut against the second support face of the shoulder, the aforementioned screws traversing the aforementioned shoulder from side to side and attaching on the connecting means of the aforementioned hub.   
     
     
         2 . A device according to  claim 1 , wherein:
 the hub comprises radial attachment brackets each comprising an axial bore for the passage of locking screws,   axial bores for the passage of locking screws traverse the shoulder from side to side through of the tread, the aforementioned bores being arranged so as to be positioned opposing bores of the attachment brackets when the aforementioned tread is mounted on the hub,   the locking screws traverse the bores of the attachment brackets and of the shoulder.   
     
     
         3 . A device according to  claim 2 , wherein the attachment brackets are connected to each other, the connection between the aforementioned brackets comprising axial orifices for air circulation. 
     
     
         4 . A device according to  claim 1 , wherein the tread comprises axial orifices for air circulation. 
     
     
         5 . A device according to  claim 2 , wherein the attachment brackets comprise a front face positioned against a support face of the tread and a rear face opposed to the aforementioned front face, the aforementioned rear face being provided with ribs arranged on both sides of the axial bore. 
     
     
         6 . A device according to  claim 5 , wherein the ribs are spaced so that a clamping nut of the locking screw can be housed between the aforementioned ribs. 
     
     
         7 . A device according to  claim 5 , wherein the axial bore of the attachment brackets is tapped, the aforementioned tapping extending on the interior flanks of the ribs. 
     
     
         8 . A device according to  claim 7 , wherein the tapping formed on the interior flanks of the ribs is not coaxial with the tapping in the attachment brackets, so that the aforementioned ribs exert a clamping force on the locking screw. 
     
     
         9 . A device according to  claim 2 , wherein the tread comprises ribs stiffening the periphery of the aforementioned tread, the aforementioned ribs being arranged between one of the support faces of the shoulder and the internal bore of the aforementioned tread, the aforementioned ribs being located at equal distance from each other and positioned between the axial bores of the aforementioned tread. 
     
     
         10 . A device according to  claim 1 , wherein protective washers are positioned on the truck, the aforementioned washers being housed in the interior of the bore of the hub, both sides of the rollers, the aforementioned washers comprising a circular lip whose exterior diameter substantially corresponds to the interior diameter of the aforementioned bore.