Golf club

Patent metadata

Field	Value
Publication number	US-2019009155-A1
Application number	US-201816023618-A
Country	US
Kind code	A1
Filing date	Jun 29, 2018
Priority date	Jul 10, 2017
Publication date	Jan 10, 2019
Grant date	—

Abstract

A golf club 2 includes a head 4, a shaft 6, and a grip 8. The club 2 has a forward club flex of greater than or equal to 170 mm. The forward club flex is measured for a golf club in the completed state. The weight of the head is denoted by Wh, and the weight of the club is denoted by Wc. Wh/Wc is greater than or equal to 0.72. With the golf club 2, a force acting on the player's body during a swing can be reduced. The golf club 2 can stabilize swing.

First claim

What is claimed is:

1 . A golf club comprising:
a head; a shaft; and a grip, wherein a forward club flex is greater than or equal to 170 mm, when a weight of the head is denoted by Wh, and a weight of the club is denoted by Wc, Wh/Wc is greater than or equal to 0.72, and when a distance between a butt-side end of the grip and a center of gravity of the grip is denoted by Lg 1 , and a length of the grip is denoted by Lg 2 , Lg 1 /Lg 2 is greater than or equal to 0.37.

2 . The golf club according to claim 1 , wherein
a grip weight Wg is less than or equal to 30 g.

3 . The golf club according to claim 1 , wherein
a club length is greater than or equal to 45.7 inches and less than or equal to 46.5 inches.

4 . The golf club according to claim 1 , wherein
a swing weight is greater than or equal to D 5 .

5 . The golf club according to claim 1 , wherein
a shoulder center grip GLL calculated by Equation (1) below is less than or equal to 140 kg·cm 2 :
Shoulder center grip GLL=Wg×L×L (1)
wherein Wg is a weight (kg) of the grip, and L is a value calculated by Equation (2) below:
L =[60 2 +( Lg 1) 2 ] 1/2 (2)
wherein Lg 1 is a distance (cm) between a butt-side end of the grip and a center of gravity of the grip.

6 . The golf club according to claim 1 , wherein
a shaft weight Ws is less than 50 g.

7 . The golf club according to claim 1 , wherein
a shaft weight Ws is less than or equal to 43 g.

8 . The golf club according to claim 1 , wherein
a club weight Wc is less than or equal to 290 g.

9 . The golf club according to claim 1 , wherein
a club weight Wc is less than or equal to 272 g.

10 . The golf club according to claim 1 , wherein,
when a distance between a butt end of the shaft and a center of gravity of the shaft is denoted by Lf 1 , and a full length of the shaft is denoted by Lf 2 , Lf 1 /Lf 2 is less than or equal to 0.46.

11 . The golf club according to claim 1 , wherein,
when a distance between a butt end of the shaft and a center of gravity of the shaft is denoted by Lf 1 , and a full length of the shaft is denoted by Lf 2 , Lf 1 /Lf 2 is less than or equal to 0.44.

Assignees

• Sumitomo Rubber Ind

Inventors

• Mizutani Naruhiro
• Hayase Seiji
• Takasu Kenji
• Nakano Takashi
• KOHNO Daisuke

Classifications

• A63B2209/023

  Long, oriented fibres, e.g. wound filaments, woven fabrics, mats · CPC title

• A63B53/0466

  wood-type · CPC title

• A63B60/22

  Adjustable handles · CPC title

• A63B2053/0491

  with added weights, e.g. changeable, replaceable · CPC title

• A63B60/02 Primary

  Ballast means for adjusting the centre of mass (A63B60/24, A63B60/54 take precedence) · CPC title