Patent ID: 8991938
Filing Date: 2015-03-31
Classification: B60B

Abstract:
1. A wheel construction which includes a wheel rim which in use, at a tire side of the rim, receives a tire, the rim being circular and having axially inner and outer portions, and a mid-portion between the axially inner and outer portions, the mid-portion including a circumferential well where the radius of the wheel rim is a minimum, and each axially inner and outer portion providing a flange, a connecting surface adjoining the flange and extending axially towards the mid-portion, the flange and a part of the connecting surface providing a seat for a bead of the tire, and there being a side part between the connecting surface and the mid-portion, and wherein for at least one of the inner and outer portions, the connecting surface is a frusto-conical having an axial end of greatest radius and an axial end of least radius, the connecting surface, at its axial end of greatest radius, adjoining the flange, and the axial end of least radius adjoining a circumferentially extending convex surface, when viewed from the tire side of the rim, the convex surface at the tire side of the rim extending radially outwardly of the wheel axis beyond the end of least radius of the adjoining frusto-conical connecting surface, and the side part of the at least one of the axially inner and outer portions including a frusto-conical region and a curved region, the frusto-conical region at its end of greatest radius adjoining the convex surface, and the curved region including first and second axially spaced circumferentially extending concave surfaces, when viewed from the tire side of the rim, the first concave surface of the curved region continuously adjoining the end of least radius of the frusto-conical region, and the second concave surface continuously adjoining the mid-portion, and between the first and second concave surfaces there being a convex formation, when viewed from the tire side of the rim, the convex formation continuously melding with the adjacent first and second concave surfaces such that the curved region is continuously undulating.