Sprocket-wheel gear-wheel or like wheel substantially manufactured from a synthetic material

Claim 1

A sprocket-wheel, gear-wheel or like wheel substantially manufactured from a synthetic material and comprising a hub and a toothed ring or the like affixed thereto in spaced concentric relationship therewith, said hub being divided along a plane which lies substantially perpendicular to the centre-line of the hub-boring such that the hub comprises two parts of substantially annular form, the opposing radial surfaces of which are each provided with an open and radially outward directed recess of substantially annular form and with an outwardly facing periphery of non-circular form, in which both said recesses jointly accommodate a part of substantially annular form which is affixed to the said toothed ring, in which the radially inwardly facing periphery of said part corresponds in form to the said outwardly facing peripheries of the recesses in two hub parts, and in which the two hub parts are affixed to one another by fixing means which also clamps the said part affixed to the toothed ring therebetween in the recesses.