Bridgestone Sports Co., Ltd.

Masaomi Hiruta

Hideo Matsunaga

Makoto Kubota

Hirato Shimasaki

Hiroshi Ezaki

Hidekimi Inoue

Ryohei Uji

Daisuke Mikame

Teruaki Seki

Ikuo Aoki

A hollow golf club head made of metal includes a face portion, a sole portion, a side portion, and a crown portion. The crown portion and at least a part of the side portion have a Young's modulus lower than the face portion and the sole portion.

Golf club head

This invention provides a golf club head including a face member. The face member includes a face portion forming a face, and a crown extending portion extending backward from the upper edge of the face portion. The width of the crown extending portion in a face to back direction at the toe side is larger than that in the face to back direction at the heel side.

A golf club headhas a face part, a crown part, a sole part, a side part, and a hosel part, which are formed of titanium or a titanium alloy. The golf club headis formed by integrating a head bodyand a face platewith each other by welding such as laser welding or plasma welding. A thick partis provided only in the central portion in the toe-heel direction of the cross corner portion between the face partand the sole part. The width in the toe-heel direction of the thick partis 20 mm or narrower. Therefore, the golf club head in accordance with the present invention can increase a carry on average even if being used by an amateur golfer who is prone to hit a ball by varied hit points across the clubface.

There is provided a golf club head capable of increasing carry on average even if being used by an amateur golfer who is prone to hit a ball with various hit points across the clubface. A golf club headhas a face part, a crown part, a sole part, a side part, and a hosel part, which are formed of titanium or a titanium alloy. The golf club headis formed by integrating a head bodyand a face platewith each other by welding such as laser welding or plasma welding. A thick partis provided only in the central portion in the toe-heel direction of the cross corner portion between the face partand the sole part. The width in the toe-heel direction of the thick partis 20 mm or narrower.

The present invention provides a golf club head capable of increasing carry on average even if being used by an amateur golfer who is prone to hit a ball by varied hit points of clubface. A golf club headhas a face part, a crown part, a sole part, a side part, and a hosel part, which are formed of titanium or a titanium alloy. A thick partis provided near the central portion in the toe-heel direction of the rear portion of the crown part. The distance a between a foremost portionthe thick partand the foremost portion of the crown partis 20 to 80% of the total length L of the crown part

This invention provides a hollow metal golf club head including at least a face portion, sole portion, side portion, and crown portion. This golf club head includes a head main body having an opening in the face portion, and a face plate engaged and welded with the opening. The head main body comprises a protruding portion which forms a part of the face portion and protrudes upward from a central portion, in a toe-and-heel direction, of a corner portion between the face portion and the sole portion in the golf club head. The face plate comprises s a recessed portion which extends upward from the lower edge of the face plate and engages with the protruding portion.

This invention provides a golf club head including a head main body, a face plate and a hollow portion. The head main body includes an opening in a face portion, and the opening is provided with a plurality of pawls to receive the face plate which is to fit in the opening. The pawls include a large pawl and a small pawl. The large pawl is arranged in each of a heel-side upper portion and a toe-side lower portion and the small pawl is arranged in at least either one of a heel-side lower portion and a toe-side upper portion when the opening is divided into four vertically and horizontally about a face center as the center. The face plate is fitted in the opening and fixed by welding.

This golf club head is constituted by a front part including a face portion and a crown main portion , and a back part forming the remaining portion of the golf club head. A metal material forming the front part has lower Young's modulus than that of a metal material forming the back part . The front part and the back part are welded. The thickness of the center of the face portion is larger than the thickness of the periphery thereof. The thickness of the vicinity of a highest point A of the crown is small.

A set of iron golf clubs permitting to hit a ball correctly with a positive ball catching and less pulling even when used by any average golfer, in which as the club number ascends, the center distance L between the axis 20 of club shaft and the center C of club head impact face 2 is gradually longer and the weight distributed on the heel 4 is gradually smaller while the weight distributed on the toe 3 is gradually larger.

Iron golf club set

A golf club head of which the face height is larger than the sole width, a so-called 'iron' club, having at least the striking face made of a copper or copper alloy or plated with a copper.

The present invention provides a golf club head made of at least a first and second head components formed integrally with each other. A metallic material of the first head component is different in kind from that of the second head component. At an anti-disjoining device such as a projection, concavity or the like is formed, as a part of the head, on all or a part of an end face of the first head component, which is to join the second head component. Further a metallic material having a melting point 200.degree. C. or more below that of the metallic material of the first head component is cast to the first head component to integrally join the end faces of the first and second head components, thereby forming the second head component.

Growing community of inventors

Tokyo, Japan

Masaomi Hiruta