Golfball

Details

Veröffentlichungs-Nr.

EP4789733

Anmeldetag

27. Januar 2026

Veröffentlichung

12. August 2026

Rechtsraum

EP

IPC

A63B37/00

Abstract

A golf ball 2 has a plurality of dimples 10 on a surface thereof. An occupation ratio X of the dimples is 70% or more. A value Z of the golf ball 2, calculated by the following mathematical formula, is less than 0.0. Z=−535.36*Db+146.46*Lb−238.52*Da+225.22*La+111.21Db: drag coefficient under a first conditionLb: lift coefficient under the first conditionDa: drag coefficient under a second conditionLa: lift coefficient under the second conditionFirst conditionReynolds number: 1.20 * 10⁵Ratio (rω/V): 0.131Second conditionReynolds number: 0.83 * 10⁵Ratio (rω/V): 0.179The ratio (rω/V) is calculated by dividing a product of a radius r (m) and a backspin rate ω (rad/s) of the golf ball 2 by a speed V (m/s) of the golf ball 2.

Anmelder

Firma

Sumitomo Rubber Industries, Ltd.

Land

🇯🇵 Japan

Fachgebiete