Sri Sports Limited

Sumitomo Rubber Industries Limited

Dunlop Sports Company Limited

Yasushi Sugimoto

Masahiko Ueda

Naoyoshi Ueda

Takashi Nakamura

Seiji Hayase

Wataru Kimizuka

Takashi Nakano

Hiroshi Hasegawa

Yuki Motokawa

Kiyofumi Matsunaga

Tomoya Hirano

Shimpei Oyama

Daisuke Kohno

Tomio Kumamoto

Hiroshi Abe

Takahiro Norimura

Kenji Kii

Yuki Nagano

Satoru Hanamitsu

A head includes a head body including a sole and a face plate fixed to the head body. The face plate includes a plate front surface that forms a part of a hitting face, a plate rear surface, and a plate side surface. The head body includes an opening at which the face plate is disposed, and a back support portion that supports the face plate from a back side. The back support portion includes a back receiving surface forming an abutting region by abutting on an outer peripheral edge portion of the place rear surface, and a rear surface that is a surface opposite to the back receiving surface. A face-peripheral-side end of the rear surface is located on a face peripheral side relative to a face-center-side end of the abutting region.

Golf club head

A head includes a head body and a face plate. The face plate includes a plate front surface and a plate rear surface. The head body includes an opening at which the face plate is disposed, a back support portion that includes a back receiving surface abutting on an outer peripheral edge portion of the plate rear surface and that supports the face plate from a back side, a face outer portion that is a part of a hitting face and that is located on a face peripheral side relative to the plate front surface, and a body groove that is located on the back side of the face outer portion and that is recessed toward the face outer portion.

A golf clubincludes a head, a shaft, and a grip. A club inertia moment about a swing axis is defined as Isw. A club inertia moment about a grip end is defined as Ige. Ige is 2760 (kg&#xb7;cm) or greater and less than 2820 (kg&#xb7;cm). Isw/Ige is equal to or less than 2.42. A club weight is defined as Wc (kg), an axial direction distance from the grip end to a center of gravity of the club is defined as Lc (cm), and a club inertia moment about the center of gravity of the club is defined as Ic (kg&#xb7;cm). Isw is calculated by Equation (1) below. Ige is calculated by Equation (2) below.&#xd7;(+60)&#x2003;&#x2003;(1)&#xd7;()&#x2003;&#x2003;(2)

Golf club

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 set includes at least one first golf club whose loft angle is not less than 46 degrees and less than 56 degrees, and at least one second golf club whose loft angle is not less than 56 degrees and less than 60 degrees. The first and second golf clubs each comprise a face provided with score lines each formed by a groove having a groove bottom and a pair of opposite grooves walls which are inclined at an inclination angle with respect to a normal direction to the face so that the groove width between the opposite grooves walls is increased from the groove bottom toward the face. The inclination angle of the groove walls of the score lines of the first golf club is in the range from 28 to 42 degrees. The inclination angle of the groove walls of the score lines of the second golf club is in the range from 23 to 37 degrees and smaller than that of the first golf club.

A headincludes a head body hand a face plate pfixed to the head body h. The face plate pincludes a plate front surface fhaving a hitting face, a plate back surface b, and a plate side surface s. The head body hincludes a body side surface vopposed to the plate side surface s. A gap gp is provided at at least a part between the plate side surface sand the body side surface v

A golf clubincludes a head, a shaft, and a grip. A club inertia moment about a swing axis is defined as Isw. A club inertia moment about a grip end is defined as Ige. Ige is 2920 (kg&#xb7;cm) or greater and less than 2970 (kg&#xb7;cm). Isw/Ige is equal to or less than 2.48. A club weight is defined as Wc (kg), an axial direction distance from the grip end to a center of gravity of the club is defined as Lc (cm), and a club inertia moment about the center of gravity of the club is defined as Ic (kg&#xb7;cm). Isw is calculated by Equation (1) below. Ige is calculated by Equation (2) below.&#xd7;(+60)&#x2003;&#x2003;(1)&#xd7;()&#x2003;&#x2003;(2)

A golf clubincludes a head, a shaft, and a grip. A club inertia moment about a swing axis is defined as Isw. A club inertia moment about a grip end is defined as Ige. Ige is 2870 (kg&#xb7;cm) or greater and less than 2920 (kg&#xb7;cm). Isw/Ige is equal to or less than 2.46. A club weight is defined as Wc (kg), an axial direction distance from the grip end to a center of gravity of the club is defined as Lc (cm), and a club inertia moment about the center of gravity of the club is defined as Ic (kg&#xb7;cm). Isw is calculated by Equation (1) below. Ige is calculated by Equation (2) below.sw=&#xd7;(+60)&#x2003;&#x2003;(1)ge=&#xd7;()&#x2003;&#x2003;(2)

A golf clubincludes a head, a shaft, and a grip. A club inertia moment about a swing axis is defined as Isw. A club inertia moment about a grip end is defined as Ige. Ige is 2820 (kg&#xb7;cm) or greater and less than 2870 (kg&#xb7;cm). Isw/Ige is equal to or less than 2.42. A club weight is defined as Wc (kg), an axial direction distance from the grip end to a center of gravity of the club is defined as Lc (cm), and a club inertia moment about the center of gravity of the club is defined as Ic (kg&#xb7;cm). Isw is calculated by Equation (1) below. Ige is calculated by Equation (2) below.&#xd7;(+60)&#x2003;&#x2003;(1)&#xd7;()&#x2003;&#x2003;(2)

A hollow golf club head comprises a face portion with a face for hitting a ball on its front and a crown portion forming a top surface of the head, wherein the head comprises a face member including the face portion and made of a metallic material and a crown member attached to the face member to form the crown portion at least partially, the crown member includes a first member made of a metal material and a second member made of a fiber reinforced resin for supporting the first member so that the first member does not directly contact with the face member, the head has a primary natural frequency of from 3800 to 6500 Hz and an antinode when the head vibrates in the primary natural mode appears in the first member.

A golf clubincludes a shaftand a head. When a shaft full length is defined as Ls, and a distance between a tip end Tp of the shaft and a center of gravity G of the shaft is defined as Lg, a ratio (Lg/Ls) is 0.52 or greater and 0.65 or less. When a club length is defined as X inch and a club weight is defined as Y gram, the golf clubsatisfies the following relational expression (1).&#x2266;&#x2212;7.62+635 &#x2003;&#x2003;(1) Preferably, the distance Lg is 615 mm or greater and 660 mm or less. Preferably, a shaft weight Ws is equal to or less than 52 g. Preferably, the club length X is equal to or less than 46 inch.

In a shaft, a shaft full length is defined as Ls, and a distance between a tip end of the shaft and a center of gravity G of the shaft is defined as Lg. Lg/Ls is 0.52 or greater and 0.65 or less. A shaft weight is equal to or less than 52 g. Preferably, the shafthas butt partial layers aand a. When a point separated by 250 mm from a butt end Bt is defined as P; a range from the point Pto the butt end Bt is defined as a specific butt range; the total weight of the butt partial layers aand aexisting in the specific butt range is Wa gram; and a weight of the shaft in the specific butt range is defined as Wb gram, Wa/Wb is preferably equal to or greater than 0.4.

Golf club shaft

A head of a first aspect is provided with a head body h, a double-stick tape t, and an adherend sbonded to the head body hby the double-stick tape t. The double-stick tape thas a first adhesive layerprovided as an innermost layer, a second adhesive layerprovided as an outermost layer, and intermediate layersandprovided between the first adhesive layerand the second adhesive layer. The intermediate layer includes a fiber layerand/or a resin layer. The resin layeris free of bubbles. In a head of a second aspect, a head body hor an adherend shas a recessed part. In a head of a third aspect, an adherend shas a metal memberand an elastic member. The elastic memberhas a peripheral partdirectly or indirectly abutting on a side surfaceof the metal member

A golf club comprises a club shaft and a golf club head attached to the tip end of the club shaft, wherein the length of the golf club is from 45 to 47 inches, the volume V of the golf club head is from 440 to 470 cu&#xb7;cm, the moment of inertia M of the golf club head around the center line of the club shaft is 5500 to 6500 g sq&#xb7;cm, and the ratio M/V of the moment of inertia M (g sq&#xb7;cm) to the volume V (cu&#xb7;cm) is from 11.0 to 13.5.

Growing community of inventors

Kobe, Japan

Yasushi Sugimoto