VEHICLE WHEEL RIM DEVICE FOR MOUNTING A FIRST TIRE CASING INWARDLY OF A SECOND TIRE CASING, PROVIDING A SAFETY EMERGENCY WHEEL DEVICE

摘要

A vehicle wheel rim device of a type in which a first wheel rim (10) carries a first tire casing (12) and having a second tire casing (14) inwardly of the first tire casing, characterized by the provision of a second rim (34) inwardly of the first rim, the generally circular edge-portions (36) of the second rim being supported by the generally cylindrical body portion (22) of the first rim, and are spaced from the adjacent circular edge-portion (16) of the first rim, and providing that the circular support edge-portions of the second rim provide support for the bead-portions (30) of the second tire casing in a manner in which the second tire casing bead portions are substantially spaced, respectively from the bead portions (20) of the first tire casing, thus protecting the inward tire casing from the erratic flopping of the outer tire if it becomes disabled.