Bead reinforcement for a radial tire for heavy duty

Details Bead reinforcement for a radial tire for heavy duty Bead reinforcement for a radial tire for heavy duty

1988-02-16

1992-01-14

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152543, 152546, 152547, 152554, B60C 1506

Patent

active

050801589

ABSTRACT:
The invention relates to a pneumatic radial tire for heavy duty vehicles such as trucks, buses etc., having an improved reinforced structure of bead section, which can be effectively improved in the durability under very heavy load conditions and can be recapped two or three times without damaging the base tire.
The radial tire for heavy duty, comprises: a carcass ply (2) of a radial or a semi-radial construction composed of at least one rubberized metal cord ply; a first metallic cord reinforcing layer (4) disposed at the outside of the turned up portion (2') of the carcass ply (2); and a second fiber cord reinforcing layer (6) secured to the inner surface of the carcass ply main portion.
The radially inner portion of the second reinforcing layer (6) is interposed by a given width (L) between the turned up portion (4') of the first reinforcing layer (4) and the main portion of the carcass ply in bead base portion.
The height (h1) of the radially outermost end (2a) of the turned up portion (2') of the carcass ply (2) is higher than the height (h2) of the radially outermost end (4a) of the first reinforcing layer (4).

REFERENCES:
patent: 2155564 (1939-04-01), Schippel
patent: 3964533 (1976-06-01), Arimura et al.
patent: 4215737 (1980-08-01), Motomura et al.
patent: 4699194 (1987-10-01), Iuchi

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