Abstract: In a golf club head, a head main body formed of metal includes a recessed portion in the face part thereof, a face member formed of a highly elastic synthetic resin material is mounted in the recessed portion, and, at the ball hitting surface side of the face member, there is disposed a protective layer formed of a metal plate which is higher in hardness than the highly elastic synthetic resin material, is equal to or smaller than the head main body in specific gravity, and is smaller in thickness than the face member. The golf club head can prevent the ball hitting surface of the golf club head from being worn without impairing ball carry and ball hitting feeling.

Abstract: A golf clubhead is constructed such that a cavity portion having a face plate supporting wall at its bottom is provided in a face portion of a metal head body so that a face plate made of beryllium is mounted on the cavity portion. It is possible to increase the flying or driving distance of a golf ball.

Abstract: A shaft for a golf club includes a tubular main body made of a fiber-reinforced resin and being 10 mm or less in the outside diameter of the tip of the body. The outside circumferential surface of the main body is tapered from the butt thereof to the tip thereof at a ratio of 0/1,000 to 4/1,000 so as to be nearly uniform in diameter. The thickness of the main body is gradually increased from the tip thereof to the butt thereof. The golf club having the shaft, receives a low resistance of air, and has a rigidity appropriate for a powerful golfer who swings the club quickly.

Abstract: In A golf club head, a central portion of a sole surface existing substantially centrally between the toe and heel sides is left as it is, two recesses are formed on the toe and heel sides, and the wall surfaces of the recesses are formed so as to be inclined gently from the sole surface central portion. The golf club head can cut into the ground properly when hitting a ball and also allows a golfer to hook or slice the ball freely.

Abstract: A golf club head capable of reducing the vibration of the head at the moment of its impact on a golf ball even if the sweet spot is missed, thereby improving the directional property of the ball. The golf club head includes a face plate formed of resin mounted to a face portion of a head main body formed of metal. A flange portion extending backwardly of the head main body is disposed in a back portion of the head main body in a manner to extend along the peripheral edge portion of the back portion and correspond to the peripheral edge portion of the face plate. The flange portion is projected backwardly of the head main body longer than the thickness of the flange portion.

Abstract: A golf club shaft comprising a mandrel with a tapered surface as its outer circumference which is wound with three layers of prepreg sheets of high-strength fiber impregnate with synthetic resin. The middle layer is also wound with a separate string member. The inner layer fibers and the separate string member are arranged in a criss-cross pattern running generally in the longitudinal axial direction of the shaft. However, the fibers which are part of the middle and outer layers run unidirectionally only in the longitudinal axial direction of the shaft. No fibers run in a circumferential direction. In addition, the fiber and matrix of the outer layer become transparent after curing. Thus, even when the shaft is shrunk toward the center, no zigzag or wrinkles are generated in the string member found between the middle and outer layers nor in the outer layer fibers themselves.

Abstract: A golf club head includes: a hosel portion for connection with a shaft; and a base metal body formed integrally with the hosel portion by a metal material so as to continue to the hosel portion, the base metal body being constituted by a sole portion, a top portion and a space portion formed between the sole portion and the top portion and filled with a filling member, the sole portion and the top portion being formed so as to be substantially equal in weight to each other, the space portion being placed in a sweet-spot corresponding position so that the space portion corresponds to a sweet spot, the filling member being formed by a material smaller in specific gravity than the base metal body.

Abstract: A golf club head which is more durable, capable of driving a golf ball further and providing a desirable, "soft" feeling when hitting the golf ball. These objectives are achieved by configuring the head to efficiently transmit and store potential energy due to impact with the golf ball. The head comprises a hollow shell defining a cup portion and an opening or concave portion which receives a face plate. The face plate forms a contact surface for striking a golf ball. The structural arrangement causes the hollow shell to elastically deform upon contact with a golf ball to enhance driving performance.

Abstract: A golf club head includes a metal head body and a face plate made of fiber reinforced resin and fitted to a recess formed in a face portion of the metal head body. A support pin is inserted into the main body from a back portion thereof, threadingly engaged with the face plate and prevented from being exposed on a hitting surface of the face plate. A back portion of the head body is formed with a concave whose outer configuration is substantially the same as that of the face plate. The concave is located at a position of the back portion corresponding to a position of the face plate on the face portion. A central recess is further formed in the back portion within the concave depending on a position of a sweet spot. A flexible member is attached to the central recess. It is possible to reliably prevent the accidental separation of the face plate from the head body, and the damage and/or breakage of the face plate due to the difference in stiffness between the face plate and the metal head body.

Abstract: A golf club head made of a metallic material includes a projection which is rearwardly projected away from a face portion of a main body while forming a cavity having the substantially same interior configuration as the exterior configuration of the projection. A face member molded of a synthetic resin and having a fully closed air chamber formed therein is securely fitted into the cavity using an adhesive. A ball hitting surface of the face member is flush with the surface of the face portion. A thickness of the face member between the ball hitting surface and the air chamber is larger than a thickness of the same on the back portion side about three times.