Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1990-04-09
1992-08-11
Knable, Geoffrey L.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
D12147, B60C 1111
Patent
active
051370689
ABSTRACT:
The radial-ply tire for use on trucks and constructed according to the invention possesses a tread profile which comprises an equatorial line, a tread-profile width and a plurality of rows of blocks separated from one another by circumferential grooves. Each block comprises two substantially parallelogram-shaped blocks parts separated from each other by a fine cross slit substantially centrally extending through the respective block. Two of four block edges of each substantially parallelogram-shaped block part extend substantially parallel to the equatorial line of the tread profile. The other two block edges inclinedly extend relative to the equatorial line at angles which are not 90.degree., whereby all inclinedly extending block edges in a row of blocks form with the equatorial line at least substantially equal angles of inclination.
REFERENCES:
patent: D310648 (1990-09-01), Armellin
patent: D310985 (1990-10-01), Covert et al.
patent: D311891 (1990-11-01), Covert et al.
patent: 4327792 (1982-05-01), Landers
patent: 4412576 (1983-11-01), Nakajima
patent: 4690189 (1987-09-01), Bradisse et al.
patent: 4702292 (1987-10-01), Brayer
patent: 4856571 (1989-08-01), Collette et al.
European Patent Office Search Report.
Loidl Helmut
Stelzer Josef
Knable Geoffrey L.
Semperit Reifen AG
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