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Patent Searching and Data


Title:
PNEUMATIC TIRE FOR MOTORCYCLE
Document Type and Number:
Japanese Patent JP3821942
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To improve a shock absorbing property in a pneumatic tire for motorcycle comprising a belt layer of a high elastic or a non-extensible cord, especially in a low aspect ratio pneumatic tire for motorcycle.
SOLUTION: The outer surface of a side portion is composed of a side upper area (a) ranging on a tread end, a bead back face lower area (c) rising from a bead hill, and a side connecting area (b) connecting them. The side upper area (a) and the side connecting area (b) are formed with a plane surface and a recessed curved surface, and the bead back face lower area (c) is formed with a lower heel wall surface substantially rising from the bead hill, a curved surface with a curvature radius R1 ranging with the lower heel wall surface, and a curved surface with a curvature radius R2 which is smaller than the curvature radius R1. The curvature radius R1, in a flee state in which the tire is not mounted on a rim, is not less than 1.2 times as a flange curvature radius (r) of a standard rim which is applies for a tire. Moreover, in a state in which the tire is mounted on the standard rim and 80% of a standard maximum inner pressure is filled in the tire, the height of the upper end of the curved surface with the curvature radius R2 is 1.1 to 1.8 times as the height of a flange of the rim.


Inventors:
Tatsuya Ito
Application Number:
JP2086598A
Publication Date:
September 13, 2006
Filing Date:
February 02, 1998
Export Citation:
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Assignee:
Bridgestone Corporation
International Classes:
B60C3/04; B60C13/00; B60C9/00; B60C9/08; B60C9/18; B60C15/00; (IPC1-7): B60C13/00; B60C3/04; B60C9/00; B60C9/08; B60C9/18; B60C15/00
Domestic Patent References:
JP10109507A
JP10067205A
JP2000198328A
JP63041207A
Attorney, Agent or Firm:
Ichiro Honda