公开(公告)号：EP4218964A1

公开(公告)日：2023-08-02

申请号：EP23151354.0

申请日：2023-01-12

申请人： Sumitomo Rubber Industries, Ltd.

发明人： SAJIMA, Takahiro ,  KOJIMA, Daijiro

IPC分类号： A63B37/00 ,  A63B47/00 ,  A63B24/00

摘要： A golf ball 2 having excellent flight performance upon a shot with a utility club is provided. The golf ball 2 has a large number of dimples 8 on a surface thereof. A trajectory of the golf ball 2 calculated under conditions of an initial speed of 260 ft/s, a launch angle of 15.0 degrees, and an initial backspin rate of 3000 rpm satisfies the following mathematical formula,
Amax ≥ 4.0 * Vave + 13.10 , wherein Amax represents a maximum value (degree) of a vector angle A in the trajectory, and Vave represents an average volume (mm 3 ) of the dimples 8. The vector angle A is calculated by the following mathematical formula. A = ATAN Vy / Vx , wherein Vx represents a horizontal component of a speed of the golf ball 2, and Vy represents a vertical component of the speed of the golf ball 2.

公开(公告)号：EP4218963A1

公开(公告)日：2023-08-02

申请号：EP23151334.2

申请日：2023-01-12

申请人： Sumitomo Rubber Industries, Ltd.

发明人： KOJIMA, Daijiro ,  SAJIMA, Takahiro

IPC分类号： A63B37/00 ,  A63B47/00 ,  A63B24/00

摘要： A golf ball 2 having excellent flight performance upon a shot with a fairway wood is provided. The golf ball 2 has a large number of dimples 8 on a surface thereof. A trajectory of the golf ball 2 calculated under conditions of an initial speed of 260 ft/s, a launch angle of 15.0 degrees, and an initial backspin rate of 3000 rpm satisfies the following mathematical formula. Amin ≥ − 5.0 * Vave − 38.98 , wherein Amin represents a minimum value (degree) of a vector angle A in the trajectory, and Vave represents an average volume (mm 3 ) of the dimples 8. The vector angle A is calculated by the following mathematical formula. A = ATAN Vy / Vx , wherein Vx represents a horizontal component of a speed of the golf ball 2, and Vy represents a vertical component of the speed of the golf ball 2.