Radial tire having a tread provided with sub-circumferential lon

Details Radial tire having a tread provided with sub-circumferential lon Radial tire having a tread provided with sub-circumferential lon

1992-06-29

1994-12-06

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

B60C 1108

Patent

active

053701682

ABSTRACT:
A tread pattern of a radial tire for motor-vehicles offering high performance comprises oblique longitudinal grooves, inclined to the circumferential direction of the tire by an angle included between 2.degree. and 20.degree., the opposite ends of said grooves being axially offset relative to one another: all grooves may be inclined in the same direction or may converge, preferably symmetrically, towards the mid-circumferential plane of the tire, specifically for directional patterns. The longitudinal grooves are associated with a plurality of transverse grooves having their central portion inclined in the opposite sense relative to the longitudinal grooves, according to an angle included between 30.degree. and 80.degree., with respect to the circumferential tire direction. The combination of the longitudinal and transverse grooves according to the established inclinations defines plugs on the tire contact-area. Tangential forces generally combining with one another thereby generating a resultant force having the axial component (drift force) of substantially zero value.

REFERENCES:
patent: D284364 (1986-06-01), Nakanishi et al.
patent: 3986545 (1976-10-01), Montagne
patent: 4146415 (1979-03-01), Caretta et al.
patent: 4351381 (1982-09-01), Roberts et al.
patent: 4619243 (1986-10-01), Vironneau et al.
patent: 4726407 (1988-02-01), Hayakawa et al.
patent: 4819704 (1989-04-01), Misawa et al.
patent: 4953604 (1990-09-01), Shepler et al.
patent: 4962801 (1990-10-01), Tsuda
patent: 5105864 (1992-04-01), Watanabe et al.
Gummibereifung, vol. 57 No. 10, 1981, Bielefeld, Deutschland p. 91; "ECR Profiele, Type EW3".

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