Bridgestone Sports Co., Ltd.

Takaharu Takechi

Kozue Wada

Hiroshi Takahashi

Tomonori Kitagawa

Masaya Takagi

Daisuke Horii

Yasunori Imamoto

Fumiaki Sato

Tomoe Watanabe

A golf club head according to the disclosure is a cavity-back iron type golf club head that includes a face portion, a cavity portion provided behind the face portion, and a protrusion provided on a lower part of a rear face of the face portion. The protrusion includes a first recess extending from an upper surface of the protrusion toward a sole, a second recess positioned closer to a toe than the first recess is and extending from the upper surface of the protrusion toward the sole, and a thick portion provided between the first and second recesses in a toe-heel direction. The first and second recesses each has a substantially trapezoidal shape in a cross-sectional view taken along a plane that is parallel to a front face of the face portion and passes through a deepest part of each of the first and second recesses.

Golf club head and set of golf clubs

A golf club head according to the disclosure is a cavity-back iron type golf club head that includes a face portion and a back portion. The face portion includes a front face and a rear face facing away from each other, the front face being a ball-striking face. A non-metallic member is fixed to the rear face. An abutment portion including a tip portion with a curved surface is provided on the back portion. The abutment portion is passed through the back portion, and the curved surface of the tip portion contacts the non-metallic member.

Golf club head

A golf club head having a hollow structure includes a face, a sole, and a crown. The face includes a front surface and a back surface that face away from each other. The front surface is a ball-striking surface. The sole includes an abutment structure. The abutment structure includes a metallic sole fixation member fixed to the sole, an elastic member, and a metallic pin member connected to the metallic sole fixation member through the elastic member.

Golf club head and method of manufacturing same

A golf club head having a hollow structure is provided. The golf club head includes a face, and a body including at least a crown, a sole, and a hosel chamber. The crown, the sole, and the hosel chamber include laminated layers of a fiber-reinforced resin. The crown includes at least one first rigidity control portion that partially extends in a toe-heel direction. The sole includes at least one second rigidity control portion that extends from a back surface side of the face toward a back end of the body. One of the first rigidity control portion and the second rigidity control portion decreases flexural rigidity in a face-back direction, and the other of the first rigidity control portion and the second rigidity control portion increases flexural rigidity in the face-back direction.

An iron-type golf club head for a golf club includes a body and a face joined to the body. The face includes a front surface including a ball striking surface, and a rear surface facing an interior surface of the body. Multiple independent depressions are formed in the rear surface toward the front surface. Each of the independent depressions is at least partially filled with a non-metallic material.

Iron-type golf club head

A golf club head comprises two weight members, and in a reference plan view where a sole part faces upward and a hosel hole central axis extension line is vertical, a reference imaginary straight line, a first imaginary straight line and a second imaginary straight line are set. The reference imaginary straight line passes through a central axis of a hosel hole and a head gravity center is determined when weight members are not attached. The first imaginary straight line passes through the central axis of the hosel hole and a center of the first opening part. The second imaginary straight line passes through the central axis of the hosel hole and a center of the second opening part. A first angle &#x3b8;between the reference and first imaginary straight lines is &#xb1;10 degrees or less, and a second angle &#x3b8;between the reference and second imaginary straight lines is larger than the first angle &#x3b8;.

A hollow golf club head having a face part, a sole part, a side part, a crown part, and a hosel part, comprises one or more of inner ribs that are disposed on at least one of the sole part and the side part and that inwardly project from an inner surface of the one, one or more of outer ribs that are disposed on at least the one of the sole part and the side part and that outwardly project from an outer surface of the one, and one of the inner ribs is arranged between the outer ribs in a toe-to-heel direction.

A hollow golf club head comprises a face part, a sole part, a side part, a crown part, and a hosel part. At least one of the face part and the crown part has portions of two different rigidities that are first and second rigid portions, the first rigid portion has a first rigidity, the second rigid portion is made of the same material as the first rigid portion, and the second rigid portion has the same thickness as the first rigid portion but has a lower rigidity than the first rigidity of the first rigid portion.

A golf club head having a face part, a sole part, a side part, a crown part and a hosel part, all of which surround a hollow part comprises a penetration hole that is provided on the crown part, penetrating the crown part so that the hollow part is connected with an outer atmosphere of the golf club head and a non-metal cover that is provided over the penetration hole. A recess part, which forms a recess, is provided on a surface of the non-metal cover.

Wood golf club head

Iron golf club head

An iron type golf club head includes: a main body portion having a face surface and a sole surface; a backward bulging section provided at a lower back section of the main body portion, the bulging section including: an upper surface side recess formed to extend downward from the upper surface of the backward bulging section; and a lower surface side recess formed to extend upward from the lower surface of the backward bulging section; and a hosel portion connected to the main body portion, wherein the upper surface side recess and the lower surface side recess are overlapped at least in part with each other in the perspective side view of the head when viewed from the toe side of the iron type golf club head.

Growing community of inventors

Tokyo, Japan

Takaharu Takechi