Heavy duty pneumatic radial tires

Details Heavy duty pneumatic radial tires Heavy duty pneumatic radial tires

1985-07-24

1987-11-10

Ball, Michael

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152534, 152543, 152546, 152547, 152554, 152556, B60C 1506

Patent

active

047050918

ABSTRACT:
Heavy duty pneumatic radial tire which has the feature as follows: a pair of bead cores; a carcass ply which is composed of steel cords being turned up around the bead core from the inside toward the outside and disposed with respect to the radial direction; a belt layer whose cords are disposed at a comparative low angle with respect to the equatorial line of the tire and a steel cord reinforcing layer disposed adjacent to the outside of the turned up portion of the carcass ply, the height ho of the said turned up portion from the bead base portion is within a range of between 55 mm and 80 mm.
The rubber thickness t which is between the carcass ply itself and its turned up portion, is at a certain height h from the bead base portion, t/h decreases gradually in inverse proportion to values of h/h0 within the range of 0.3.ltoreq.h/h0.ltoreq.0.5 or 0.3.ltoreq.h/h0.ltoreq.0.8, and takes an approximate constant value from 0.1 to 0.25 within the range of 1.0.ltoreq.h/h0>0.5 or 1.0.ltoreq.h/h0>0.8.

REFERENCES:
patent: 3964533 (1976-06-01), Arimura et al.
patent: 4120338 (1978-10-01), Mirtain
patent: 4185677 (1980-01-01), Motomura et al.
patent: 4212340 (1980-07-01), van der Burg et al.
patent: 4215737 (1980-08-01), Motomura et al.
patent: 4352383 (1982-10-01), Matsumoto et al.
patent: 4398584 (1983-08-01), Tansei et al.
patent: 4495976 (1985-01-01), Makino et al.

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