Pneumatic tires and tire molding molds
The pneumatic tire design with intersecting sipes and convex-concave structures maintains open sipes, enhancing water drainage and edge effects by preventing closure during tire deformation.
JP7828427B1Active Publication Date: 2026-03-11TOYO TIRE CORP
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2026-03-11
AI Technical Summary
Technical Problem
The non-uniform rigidity of lands in pneumatic tires with varying sipe widths in the depth direction leads to uneven collapse, causing sipe openings to close and reducing the water drainage and edge effects.
Method used
A pneumatic tire design with sipes formed between intersecting wall surfaces featuring convex and concave portions that maintain a straight space in the unloaded state, ensuring the sipes remain open under tire deformation.
Benefits of technology
The design prevents sipe closure, maintaining effective water drainage and edge effects by ensuring the sipes remain open during tire operation.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 0007828427000001_ABST
Abstract
Provided is a pneumatic tire in which closure of sipe openings on the tire surface is suppressed and the water removal effect and edge effect of the sipes can be ensured. [Solution] The first wall surface 160 of the first central sipe 110 has first convex portions 161 that are provided at least in two locations spaced apart in the sipe depth direction and extend in the sipe length direction, and first concave portions 162 that are arranged between the first convex portions 161, and the second wall surface 170 of the first central sipe 110 has second concave portions 171 that face each of the first convex portions 161, and second convex portions 172 that are arranged between the second concave portions 171 and face the first concave portions 162, and in the widthwise cross section of the first central sipe 110, in an unloaded state, a straight space 110S is provided that extends linearly from the opening 110a to the bottom 110b of the first central sipe 110, and the first convex portions 161 and the second convex portions 172 abut against each other due to tire deformation that occurs when the tire is pressed down.
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Citation Information
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