Air Bladder for Safety Tire

Abstract

There is provided an air bladder for a safety tire in which an air-impermeable layer is optimized to reduce an incidence of manufacturing defects. A hollow toric air bladder 1 is accommodated in a tire 2 and filled with air at an internal pressure determined in relation to the given pressure of the tire 2. Under the normal internal pressure state of the tire 2, a cavity S1 is formed at least between an inner surface of the tire 2 and the bladder 1. When the internal pressure in the cavity S1 of the tire 2 is suddenly lowered due to puncture or the like, the air bladder 1 radially expands and eventually reaches to the inner surface of the tire 2 to take over load support from the tire 2. The air bladder 1 comprises an air-impermeable layer 6 maintaining the internal pressure of the air bladder in the inner surface of the air bladder, and the air-impermeable layer 6 consists of at least one hollow toric layer 7 and at least one auxiliary layer 8 disposed on at least a part of the hollow toric layer 7.

Dependencies are inferred from the claim text.