Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1990-08-13
1993-07-20
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
152526, 152527, 152533, 152538, B60C 1100, B60C 918
Patent
active
052289338
ABSTRACT:
A high performance pneumatic radial tire comprises a toroidal carcass, a tread radially outside a crown portion of the carcass, a belt layer interposed between the carcass and the tread and having a same width of the tread, and an auxiliary layer arranged between the belt layer and the tread and covering the entire belt layer. organic cords are buried substantially parallel to an equatorial plane of the tire in the auxiliary layer, and land portions are defined between at least two circumferential main grooves formed in an outer surface portion of the tread and between the circumferential main grooves and axially opposite edges of the tread. In the tire, a rigidity of the tire corresponding to locations overlapping the circumferential main grooves is made smaller than that of portions corresponding to the land portions by, for example, constituting the auxiliary layer from at least two auxiliary plies comprising one auxiliary ply located on a radially innermost side and covering the belt layer over an entire width thereof, and cutting at least a radially outermost auxiliary ply at locations overlapping the circumferential main grooves among the auxiliary plies having portions overlapping the circumferential main groove.
REFERENCES:
patent: 2930425 (1960-03-01), Lugli et al.
patent: 3018810 (1962-01-01), Barassi
patent: 3133583 (1964-05-01), Dobson
patent: 3503432 (1970-03-01), Maiocchi
patent: 3782438 (1974-01-01), Murtain
patent: 4231409 (1980-11-01), Mezzanotte
patent: 4869307 (1989-09-01), Bormann et al.
patent: 4989658 (1991-02-01), Maathuis et al.
Kawabata Misao
Matsunaga Hiroo
Tani Katsutoshi
Ushikubo Hisao
Yamaguchi Yutaka
Ball Michael W.
Bridgestone Corporation
Krawczyk Nancy T.
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