Patent ID: 7104302
Filing Date: 2006-09-12
Classification: B60C,Y10T

Abstract:
1. A run-flat support ring for mounting inside a tire on a wheel rim; the tire having a tread strip region; the wheel rim having an inboard and outboard side, at least one annular depression and one annular raised surface, and also defining an axial direction; the run-flat support ring comprising: a substantially cylindrical member configured for mounting around the wheel rim, said substantially cylindrical member having a radially outer-most surface for contacting the tread strip region of the tire in the event of a loss of air pressure, said substantially cylindrical member having a radially inner-most surface for securing said member to the wheel rim; and a plurality of wall members positioned circumferentially about said cylindrical member, each said wall member extending in a radial direction between said radially outer-most surface and said radially inner-most surface, each said wall member being constructed as a single wall on the outboard side that diverges in the axial direction of the wheel rim into two walls on the inboard side, and wherein the thickness of each of said two walls on the inboard side is greater than the thickness of said single wall on the outboard side.