REDUCED MASS TIRE BEAD Russian patent published in 2005 - IPC

FIELD: tire industry.

SUBSTANCE: invention relates to pneumatic tire with radial reinforcement layer of carcass for mounting tire of rim of high load capacity wheel with high bead edges. Seat surfaces in tire P form angle with axis of rotation within 0° and 6°. Tire contains radial reinforcement layer of carcass connected inside each bead to bead wire core and thus forming a turn. Wire core of bead terminates in radial direction in one section made of rubber mix arranged along axis between main part of reinforcement layer and its turn and having mainly triangular form and increased hardness of 85, Shore scale A. Outer surface of each bead in axial direction has meridional section consisting of first curvilinear part designed for contact engagement with side edge and preserving the contact and forming sharp cut of curvature at butt joint with second curvilinear part. Rubber mix section has height and radial direction providing contact of said section in axial direction over its entire height with turn of reinforced layer of carcass, being separated from main part of reinforcement layer by section of rubber mix of low hardness, equal to 60. Third section made of low hardness rubber mix passes in axial direction outwards from turn of reinforcement layer of carcass between tread which covers bead in axial direction outwards, and turn.

EFFECT: increased wear resistance of tire bead and service life of tire bead.

1 dwg