Winter type tire tread

Details Winter type tire tread Winter type tire tread

1990-11-14

1993-03-30

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152DIG3, B60C 1106

Patent

active

051980479

ABSTRACT:
A winter type tire tread (11) comprises an uneven number of, but at least three, circumferentially extending axially spaced grooves (4-6) and a plurality of zig-zag shaped grooves (36, 37) disposed circumferentially about the tire in a repetitive manner and extending across the tread from the equatorial plane (EP) towards the lateral edges (TE.sub.1, TE.sub.2) of the tire. The zig-zag shaped grooves (36, 37) situated on one side of the equatorial plane (EP) are symmetrical to those situated on the opposite side of the equatorial plane. The circumferentially and laterally extending grooves (4-6, 36, 37) define block elements (20-23), arranged in circumferentially extending rows (30-33) and having each at least in part the shape of a parallelogram. A plurality of sipes (15) are incorporated in each block element.

REFERENCES:
patent: D294134 (1988-02-01), Graas
patent: D316387 (1991-04-01), Evomaki
patent: 4947911 (1990-08-01), Ushikubo et al.
"Mechanics of Pneumatic Tires"; Editor Samuel Clark; 1981; pp. 350-353.
"Gummibereifung"; Oct. 1990, pp. 65, 66, 68.
"Gummibereifung"; Oct. 1980; pp. 60-61.

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