IP Library › Granted Patent US 10,335,657
Granted Patent B2
US 10,335,657 · App. 16/022,302 · Granted Jul 2, 2019

Golf club

Inventors: Naruhiro Mizutani (Kobe, JP); Seiji Hayase (Kobe, JP); Kenji Takasu (Kobe, JP); Takashi Nakano (Kobe, JP); Daisuke Kohno (Kobe, JP)
Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
A63B60/02A63B53/10A63B53/14A63B60/08A63B60/22A63B2209/023
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 10,335,657
App. No.
16/022,302
Granted
Jul 2, 2019
Kind
B2
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 140 mm. The forward club flex is measured for a golf club in the completed state. The grip 8 has a weight Wg of less than or equal to 30 g. 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.

Claims (47)

1. A golf club comprising:

a head;

a shaft; and

a grip, wherein

a forward club flex is greater than or equal to 140 mm,

a grip weight Wg is less than or equal to 30 g, and

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.

2. 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.

3. The golf club according to claim 1 , wherein,

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.

4. 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.

5. The golf club according to claim 1 , wherein

a shaft weight Ws is less than 50 g.

6. The golf club according to claim 1 , wherein

a shaft weight Ws is less than or equal to 43 g.

7. The golf club according to claim 1 , wherein

a club weight Wc is less than or equal to 290 g.

8. The golf club according to claim 1 , wherein

a club weight Wc is less than or equal to 272 g.

9. 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.

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 0.44.

11. A golf club comprising:

a head;

a shaft; and

a grip, wherein

a forward club flex is greater than or equal to 140 mm,

a grip weight Wg is less than or equal to 30 g, 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.

12. A golf club comprising:

a head;

a shaft; and

a grip, wherein

a forward club flex is greater than or equal to 140 mm,

a grip weight Wg is less than or equal to 30 g, and

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.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 28, 2018
From: MIZUTANI, NARUHIRO; HAYASE, SEIJI; TAKASU, KENJI; NAKANO, TAKASHI; KOHNO, DAISUKE
To: SUMITOMO RUBBER INDUSTRIES, LTD.
Reel/Frame 046233/0220 →
Priority Claims (1)
JP 2017-134322 · Jul 10, 2017 · national
Continuity (1)
Related Publication 20190009154A1 · Jan 10, 2019