Sumitomo Rubber Industries Limited

Dunlop Sports Company Limited

Kenji Kii

Masahiko Ueda

Yasushi Sugimoto

Hiroshi Abe

Tomoya Hirano

Naoyoshi Ueda

Yuki Nagano

Satoru Hanamitsu

Shimpei Oyama

A headincludes: a face member fchaving a hitting surface; and a body member bdhaving a hosel, a sole surface, and a toe-side surface. The face member fcfurther has a top-side flange FLincluding a top surface. The body member bdhas a hosel-forming partincluding the hosel, a sole-forming partincluding the sole surface, and a toe-forming partincluding the toe-side surface. The hosel-forming parthas a heel joint portion Jh joined to a heel-side end of the top-side flange FL. The toe-forming parthas a toe joint portion Jt joined to a toe-side end of the top-side flange FL. A body missing portion msin which the body member bdis not present is provided between the toe joint portion Jt and the heel joint portion Jh.

Golf club head

A golf club set includes a plurality of golf clubshaving different loft angles. The golf clubsinclude at least one 1st golf clubA having a loft angle of less than 34 degrees, and at least one 2nd golf clubB having a loft angle of not less than 34 degrees. Each of the at least one 1st golf clubA and the at least one 2nd golf clubB comprises a clubfaceprovided with a plurality of face grooveshaving a depth. The depth of the face groovesof the at least one 2nd golf clubB is larger than the depth of the face groovesof the at least one 1st golf clubA.

Golf club set

A golf club setincludes three or more golf clubs. A straight line passing through a face center Fc and parallel to a toe-heel direction is defined as an X-axis, and an X-coordinate of a sweet spot SS is defined as SS-X. When the SS-Xs of respective heads are defined as SS-X1, SS-X2, . . . , SS-Xn (n is an integer of equal to or greater than 3) in an ascending order of a loft angle from the head having the smallest loft angle, the setsatisfies the following formulas 1 and 2:SS-X1&#x2265;SS-X2&#x2265; . . . &#x2265;SS-Xn&#x2003;&#x2003;(Formula 1);SS-X1&#x3e;SS-Xn&#x2003;&#x2003;(Formula 2).

A headincludes a face member fcformed by casting and a body member bdhaving an openingon a hitting surfaceside. The opening of the body member bdis covered by the face member fc. The face member fcincludes a flat plate portion PT forming the hitting surfaceand a flange FL extending backward from a peripheral edge of the flat plate portion PT. The flange FL includes a first flange FLlocated in a top-side region, and a second flange FLlocated in a sole-side region. The flange FL is not provided in a toe-side region and a heel-side region. The flange FL is joined to the body member bd

A putter type golf club headhaving a facefor hitting a ball on a front side has a head main bodyA provided in a faceside with a concave portionand a face insertB made of an elastic material attached to the concave portionof the head main bodyA. The face insertB has a three-layered structure composed of a first layerdisposed in a frontmost side, a third layerdisposed in a rearmost side and a second layersandwiched between the first layerand the third layer, wherein hardnesses h, hand hand moduli of repulsion elasticity r, rand rof the first layer, second layerand third layer, respectively, satisfy relationships: h&#x3e;h, h&#x3e;h, r&#x3e;rand r&#x3e;r

Growing community of inventors

Kobe, Japan

Kenji Kii