Heavy-duty pneumatic tires
The tire design optimizes the placement and structural properties to protect RFID tags from distortion-induced damage, enhancing durability and readability in heavy-duty applications.
JP7806503B2Active Publication Date: 2026-01-27SUMITOMO RUBBER INDUSTRIES LTD
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Patent Information
- Application Number
- JP2022002961
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-01-12
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2042-01-12
AI Technical Summary
Technical Problem
RFID tags in heavy-duty pneumatic tires are prone to damage due to distortion under load when placed in the bead area, which can compromise their durability and readability, especially when covered with rubber.
Method used
A heavy-duty pneumatic tire design with specific ratios of complex elastic moduli for inner and outer apices, positioning the RFID tag structure axially outward of the outer apex and chafer, and optimizing the radial distance and thickness of the covering rubber to minimize strain and protect the RFID tag.
Benefits of technology
Reduces the risk of damage to RFID tags while maintaining the durability of the bead portion, ensuring effective readability and longevity of the tire.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a pneumatic tire 2 for heavy load which can decrease damage risk of an RFID tag 78 in consideration of durability of a bead part B.SOLUTION: A tire 2 comprises: an apex 40 which includes an inside apex 40u and an outside apex 40s; and a tag constitution body 28 which consists of RFID tag 78 and a covering rubber 80 covering the RFID tag 78. A ratio of complex elastic modulus of the inside apex 40u to complex elastic modulus of the outside apex 40s is 10 or more and 21 or less. The tag constitution body 28 is positioned at an outer side of the outside apex 40s in an axial direction. A radial distance from a bead base line to the RFID tag 78 is 120% or more and 145% or less of a radial distance from the bead base line to an end 54 of a folding part 52 of a carcass 10.SELECTED DRAWING: Figure 2
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