Tyre for vehicle wheels

By incorporating surface discontinuity elements on the sound-absorbing elements within the tyre structure, the tyre production process is enhanced to prevent large surface bubbles and improve noise reduction, maintaining aesthetic quality and effectiveness.

WO2026139784A1PCT designated stage Publication Date: 2026-07-02PIRELLI TYRE SPA
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
PIRELLI TYRE SPA
Filing Date
2025-12-17
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Existing tyre production processes that integrate sound-absorbing elements within the tyre structure face issues with uncontrollable expansion leading to large surface bubbles, which affect the tyre's appearance and can cause cracking, and are difficult to manage chemically due to variability in expansion behavior during vulcanization.

Method used

Forming the sound-absorbing elements with surface discontinuity elements, such as recesses and reliefs, distributed closely together on the ribbon-like component to control expansion and prevent large surface bubbles, ensuring a well-distributed porosity for effective noise absorption.

Benefits of technology

The solution results in a tyre with a sound-absorbing band that is free of large surface bubbles, maintaining aesthetic appeal and reducing noise effectively, particularly cavity noise, by up to 22% in specific frequency ranges and 1.3 dB overall.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure IB2025063047_02072026_PF_FP_ABST
    Figure IB2025063047_02072026_PF_FP_ABST
Patent Text Reader

Abstract

A tyre (1) for vehicle wheels comprises a carcass structure (2) which is toroidally shaped around a rotation axis of the tyre (1), and a tread band (7), arranged in a radially external position with respect to the carcass structure (2) and intended for contact with a road surface. The carcass structure (2) comprises a band (10) made of expanded elastomer material and which comprises a main surface (11) on which a plurality of surface discontinuity elements (12, 13), which are distributed in a regular configuration, is defined and wherein the distance between each point on the main surface (11) and at least one surface discontinuity element (12, 13) is less than 50 mm.
Need to check novelty before this filing date? Find Prior Art