Patent ID: 11884111
Assignee: OSCAR ETTORE GNALI
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A tire insert for a vehicle wheel suitable for being inserted into an inner annular cavity resulting between a tire and a rim of the vehicle wheel, the tire insert comprising an annular element made in one piece of polymer material and suitable for coming at least partially into contact with the rim of the vehicle wheel, the annular element comprising a base portion suitable for being accommodated in a rim seat of the rim and an enlarged portion having a larger section than the base portion,
wherein the enlarged portion comprises an outer enlarged portion surface of convex shape suitable for facing towards an inner tire side,
wherein the enlarged portion is shaped to have such shape and size that said enlarged portion always remains spaced apart from the inner tire side when the tire is inflated to a predetermined standard working pressure and such that, when the tire is deflated or when the tire is inflated to a pressure much lower than the predetermined standard working pressure, the enlarged portion comes into contact with the tire to support the tire during movement of the wheel,
wherein the tire insert is entirely made of ethylene vinyl acetate (EVA) having a density comprised between 0.08 and 0.12 g/cm3, a breaking load comprised between 10 and 14 kg/cm2, an elongation at break comprised between 200% and 300%, a tearing degree comprised between 1.5 and 2.5 kg/cm, a compression degree comprised between 50% and 70%, and a hardness either comprised between or equal to 16-21 Shore A, the hardness tending to change as ambient temperature changes.