Vehicle tire with tread having circumferentially varying rigidit

Details Vehicle tire with tread having circumferentially varying rigidit Vehicle tire with tread having circumferentially varying rigidit

1979-04-19

1981-05-19

Goolkasian, John T.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152210, 152209R, B60C 1106, B60C 1114

Patent

active

042678722

ABSTRACT:
A vehicle tire having first areas of a higher degree of rigidity and second areas of a lower degree of rigidity, the first and second areas having different degrees of radially inward recession upon contact of the tire with the ground and being alternately arranged in the circumferential direction of the tire. Each of the second areas comprises a central projection and a plurality of projections surrounding the central projection in spaced relation and spaced from each other. Some of the projections which are located at the tread edges have side surfaces extending substantially parallel to a radial plane through the tire. The outermost projections disposed adjacent to the projections at the tread edges have side surfaces facing the ground and extending substantially perpendicularly relative to the side surfaces of the projections at the tread edges. With this arrangement, the tire can be driven with an increased degree of driving force on rough ground or terrain, such as sand and/or gravel.

REFERENCES:
patent: 1449582 (1923-03-01), Brown
patent: 2068050 (1937-01-01), Bishop
patent: 3004578 (1961-10-01), Braudorn
patent: 3861436 (1975-01-01), Poque
patent: 3951191 (1976-04-01), Suzuki et al.

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