Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1990-09-28
1992-07-07
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
B60C 1104
Patent
active
051274558
ABSTRACT:
Significant improvements in heavy and medium duty truck tire wear and endurance are a result of this drive axle tire tread design. The traction and center tread blocks are shaped to give a uni-directional sculpture where the blocks and zigzag grooves regress from the mid-circumferential plane with forward rotation of the tire. The polygonal shaped traction tread blocks have a leading face with a lead slope angle (with respect to a normal from the surface area) greater that the trail slope angle of the trailing face. The lateral groove bottom surface configuration is a circle in the plane parallel to the principal tangential stresses on the surface area of the traction tread block due to a tractive effort of driving or braking. The result is a drive axle tread design with a uniform wear pattern, improved wear rates and improved endurance from groove fatigue while maintaining high levels of snow, wet and dry traction, rolling resistance, casing endurance, and noise abatement.
REFERENCES:
patent: D312809 (1990-12-01), Clark et al.
patent: 3237669 (1966-03-01), Travers
patent: 4122879 (1978-10-01), Takigawa et al.
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patent: 4186788 (1980-02-01), Pommier
patent: 4284115 (1981-09-01), Ohnishi
patent: 4311179 (1982-01-01), Hayakawa et al.
patent: 4796683 (1989-01-01), Kawabata et al.
"Tire Design Guide 1985", p. 182 Michelin Xm+S4.
Ball Michael W.
Krawczyk Nancy T.
Michelin Recherche et Technique
Reed Robert R.
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