pneumatic tires
The pneumatic tire design addresses noise issues during acceleration by employing a specific tread pattern with optimized grooves, ribs, and sipes to minimize slippage and deformation, enhancing noise suppression.
JP7740593B1Active Publication Date: 2025-09-17SUMITOMO RUBBER INDUSTRIES LTD
Patent Information
- Application Number
- JP2025108910
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2025-09-17
- Estimated Expiration
- 2045-06-27
AI Technical Summary
Technical Problem
Recent increases in vehicle performance and electrification have led to noise issues during tire acceleration, despite previous tread patterns being noise-free.
Method used
A pneumatic tire design featuring a specific tread pattern with four circumferential grooves and five ribs, including inclined sipes on the crown and middle ribs, optimized land ratio, and varying longitudinal stiffness of ribs to minimize slippage and noise during acceleration.
Benefits of technology
The tire effectively suppresses noise during acceleration by reducing slippage and deformation of the tread pattern, maintaining rigidity, and optimizing sipe placement and edge shapes.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 0007740593000001_ABST
Abstract
Reduces noise during acceleration. [Solution] A pneumatic tire (1) has a tread portion (2) with a pattern including four circumferential grooves (10) and five ribs. The land ratio of the pattern is 0.70 to 0.85. The ribs include a crown rib (12) including the tire equator, a pair of middle ribs (13), and a pair of shoulder ribs (14). Pitches, which are unit patterns, are repeatedly formed in each rib, and the longitudinal stiffness Ks of one pitch of the pair of shoulder ribs (14) is greater than the longitudinal stiffness Km of one pitch of the pair of middle ribs (13) and the longitudinal stiffness Kc of one pitch of the crown rib (12). Each of the crown rib (12) and the middle rib (13) is formed with a plurality of sipes (20) inclined with respect to the tire circumferential direction and the tire axial direction. None of the plurality of sipes (20) completely crosses each rib in the tire axial direction. Each of the plurality of sipes (20) does not have a chamfer between the sipe wall and the tread contact surface.
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Citation Information
Patent Citations
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