Tread for a pneumatic tire
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United States of America Patent
Stats
-
Apr 21, 1981
Grant Date -
N/A
app pub date -
May 14, 1979
filing date -
Nov 28, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tread for a pneumatic tire comprising two inner ribs extending in the circumferential direction of the tire and, to both sides thereof, tiers or block rows extending in the circumferential direction of the tire. The block rows and ribs are each separated from one another by a respective zig-zag configured circumferential groove. Each leg of the intermediate circumferential groove encloses, with the circumferential direction of the tire, an angle .alpha. of approximately 30.degree. to 50.degree., whereas the legs of the lateral circumferential grooves enclose, with the circumferential direction of the tire, an angle .beta. of approximately 55.degree. to 65.degree. and the lateral circumferential grooves are each wider than the intermediate circumferential groove.
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