Patent ID: 7770620
Filing Date: 2010-08-10
Classification: B60C,Y10T

Abstract:
1. A hollow toric reinforced air bladder which is to be accommodated in a tire and filled with air at an internal pressure determined in relation to a given air pressure of the tire to form a cavity at least between an inner surface of the tire and the bladder under a normal internal pressure state of the tire and to radially expand with a decrease in the internal pressure of the tire to take over load support from the tire, said reinforced air bladder comprising: an air-impermeable tube; and a reinforcing hoop layer surrounding entirely an outer circumference of a crown portion of the tube, wherein the reinforcing hoop layer is made of a low tension resistance material having a creep deformation rate of not more than 5% under a condition where a tension which is the same magnitude as a tension acting on a tube filled with the internal pressure corresponding to 5% of the given air pressure of the tire is applied at the testing temperature of 80 deg.C., wherein the reinforced air bladder further comprises a protection layer consisting of at least two ring members and having a wider width than that of the reinforcing hoop layer on the outer circumference of the crown portion of the tube, and the protection layer is made of a high elongation material and formed separately from the tube.