Luftreifen

Details

Veröffentlichungs-Nr.

EP4480715

Aktenzeichen

EP24172609

Anmeldetag

26. April 2024

Veröffentlichung

17. Dezember 2025

Erteilung

17. Dezember 2025

Rechtsraum

EP

IPC

B60C3/04B60C11/00B60C9/00

Abstract

In a pneumatic tire, a rim R has a rim diameter RD of 12 to 17 inches. A ratio SH/SW of a tire cross-sectional height SH to a tire cross-sectional width SW is 0.30 to 0.45. A ratio RW/SW of a rim width RW of the rim to the tire cross-sectional width SW is 0.78 to 0.99. A complex elastic modulus E* 1 (MPa) of a cap rubber layer 15 is larger than a complex elastic modulus E*2 (MPa) of a base rubber layer 16. In belt plies, a plurality of belt cords 7c having a bending stiffness M (g·cm) are arranged so as to have a number n of the belt cords per ply width of 5 cm. The complex elastic modulus E*1, the complex elastic modulus E*2, the bending stiffness M, and the number n satisfy a relationship of the following formula (1). M × n< E * 1 / E * 2 × 3000 <img class="EMIRef" id="20b38589-1aa5-473d-81c4-badf67a1c93e-ia01" />

Anmelder

Firma

Sumitomo Rubber Industries, Ltd.

Land

🇯🇵 Japan

Fachgebiete