Title:
タイヤの鋸歯状部分付き溝側部
Document Type and Number:
Japanese Patent JP2004520990
Kind Code:
A
Abstract:
An improved tire tread has tread elements which form a tread pattern exhibiting two or more peripheral grooves and a plurality of transverse grooves extending inward from the outer (ground engaging) surface of the tread. Preferably the transverse grooves extend across the peripheral groves, and there are at least four of the peripheral grooves. Along at least a major portion of one upper side of chosen ones of such grooves, the tread elements defining such groove side are formed with serrations extending inward of the groove from the tread surface at an acute angle to a radius of the tire and terminating short of the base of the groove. The serrated surfaces define an upper portion of the groove as an opening of increased area at the upper part of the groove intersecting the tread surface, and present a substantially increased traction area along the outer or open top of the groove. In modifications of this tread, the serrations may be along one side of one or more of a plurality of peripheral tread grooves, or the serrations may be may be along opposite sides of such one or more grooves.
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Inventors:
Billow, Todd
Application Number:
JP2002545928A
Publication Date:
July 15, 2004
Filing Date:
November 28, 2001
Export Citation:
Assignee:
Cooper Tire & Rubber Company
International Classes:
B60C11/04; B60C11/12; B60C11/13; B60C11/11; (IPC1-7): B60C11/04; B60C11/11; B60C11/12; B60C11/13
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Osamu Hoshino
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Osamu Hoshino