Iron-type golf club set and iron-type golf club head set
AssigneeDunlop Sports Co. Ltd.
InventorNaruhiro MIZUTANI
Life of this patent
Estimating the term…
Abstract
A set of iron-type golf clubs and a set of iron-type golf club heads are disclosed. The loft angles of the heads are gradually increased from the lowest numbered golf club to the highest numbered golf club in the set. Given that a coefficient of inertia of the head is the ratio Ms/M of a moment of inertia Ms (gram sq·cm) of the head around a horizontal axis extending in a toe-heel direction of the head passing through the center of gravity of the head, to the mass M (g) of the head, the coefficient of inertia is gradually increased with the increase in the loft angle, and the difference of the coefficient of inertia of the head of the highest numbered club from that of the lowest numbered club is 0.3 or more.
Claims7
An iron-type golf club set comprising three or more iron-type golf clubs with cub heads having different loft angles such that the loft angles are gradually increased from the lowest numbered golf club therein having the smallest loft angle to the highest numbered golf club therein having the largest loft angle, wherein
- coefficients of inertia (A) of the club heads are gradually increased with the increase in the loft angle, and
- the difference (An−A1) of the coefficient of inertia (An) of the club head of the highest numbered club from the coefficient of inertia (A1) of the club head of the lowest numbered club is 0.3 or more,
- wherein the coefficient of inertia (A) of the club head is the ratio Ms/M of a moment of inertia Ms (gram sq·cm) of the club head around a horizontal axis extending in a toe-heel direction of the club head passing through the center of gravity of the club head, to the mass M (g) of the club head.
An iron-type golf club head set comprising three or more iron-type golf club heads having different loft angles, wherein
- coefficients of inertia (A) of the club heads are gradually increased with the increase in the loft angle, and
- the difference (An−A1) of the coefficient of inertia (An) of the club head having the largest loft angle from the coefficient of inertia (A1) of the club head having the smallest loft angle is 0.3 or more,
- wherein the coefficient of inertia (A) of the club head is the ratio Ms/M of a moment of inertia Ms (gram sq·cm) of the club head around a horizontal axis extending in a toe-heel direction of the club head passing through the center of gravity of the club head, to the mass M (g) of the club head.
Dependencies are inferred from the claim text.