Golf club
AssigneeDunlop Sports Co. Ltd.
InventorTakashi NAKAMURA
Life of this patent
Estimating the term…
Abstract
A club 2 includes a head 4, a shaft 6 and a grip 8. A club length L1 is 45 inches or greater and 48 inches or less. A ratio (Wh/Wc) of a head weight Wh to a club weight Wc is equal to or greater than 0.71. A moment of inertia Ix about an axis of a swing is equal to or less than 6.90×103 (kg·cm2). However, when the club weight is defined as Wc (kg); an axial-directional distance between a grip end and a center of gravity of the club is defined as Lc (cm); and a moment of inertia about the center of gravity of the club is defined as Ic (kg·cm2), the moment of inertia Ix (kg·cm2) is calculated by the following formula (1) Ix=Wcx (Lc+60)2+Ic (1)
Claims6
A golf club comprising:
- a head;
- a shaft;
- and a grip,
- wherein a club length is 45 inches or greater and 48 inches or less;
- a ratio (Wh/Wc) of a head weight Wh to a club weight Wc is equal to or greater than 0.71;
- a moment of inertia Ix about an axis of a swing is equal to or less than 6.90×103 (kg·cm2);
- and
- when the club weight is defined as Wc (kg);
- an axial-directional distance between a grip end and a center of gravity of the club is defined as Lc (cm);
- and a moment of inertia about the center of gravity of the club is defined as Ic (kg·cm2), the moment of inertia Ix (kg·cm2) is calculated by the following formula (1).
- Ix=Wc×(Lc+60)2+Ic (1)
Dependencies are inferred from the claim text.