Highly durable tread pattern of a rib type pneumatic tire

Details Highly durable tread pattern of a rib type pneumatic tire Highly durable tread pattern of a rib type pneumatic tire

1976-10-04

1978-03-14

Hoffman, Drayton E.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152DIG3, B60C 1106, B60C 1112

Patent

active

040785963

ABSTRACT:
A highly durable tread pattern of a rib type pneumatic tire using two grooves for heavy vehicles is disclosed. The tread is provided with a pair of zigzag grooves extending circumferentially of the tread and dividing the tread into a center rib and a pair of side ribs. The center rib is provided with a plurality of sipe grooves arranged in a row and substantially equally spaced on the circumference of the tread by a pitch corresponding to a pitch between the zigzag tread grooves. The center rib and the pair of side ribs do not interrupt their circumferential continuity. Each of the sipe grooves is composed of a circumferentially extending section inclined at an acute angle of smaller than 45.degree. with respect to the circumferential direction and a widthwisely extending section inclined at an angle of at least 45.degree. with respect to the circumferential direction. These sections are formed into hook-shaped, bracket-shaped or curve-shaped formation or a combination of these formations.

REFERENCES:
patent: 3012599 (1961-12-01), Benson et al.
patent: 3115919 (1963-12-01), Roberts
patent: 3841374 (1974-10-01), Boileau
patent: 3847698 (1974-11-01), Ravenhall
patent: 3893498 (1975-07-01), Wayne
patent: 3954130 (1976-05-01), Verdier

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