The present invention relates to a racket, comprising a head region, a striking region, a throat region, a shaft region, a handle region, and a shear thickening material in the striking region, the shear thickening material being configured to exhibit shear thickening behavior when an impact occurs between the racket and an object.

A shaft for a golf club capable of hitting a higher ball and reducing a spin on the ball, has a distal part (1b) that is provided with a clubhead, a proximal part (1c) that is provided with a grip, and an intermediate part (1a) arranged between the distal and proximal parts (1b, 1c), characterized in that a thick part (17) set to thicken a wall thickness of the intermediate part (1a) relative to the distal part (1b), or a reinforcing part (19) set at the intermediate part (1a), or a combination of the thick part (17) and the reinforcing part (19), thereby improving a rigidity at the intermediate part (1a) so that a change in rigidity between the distal part (1b) and the intermediate part (1a) has an inflection point.

An integrally formed golf club (100) comprising: a golf club head (1) and a golf shaft (2), wherein the golf club head including a club head component (11) formed by casting, the casted club head component has a club head surface (111) formed by forging, the golf shaft is formed by drawing the casted club head component, and is integrally formed with the casted club head component. Thus the integrally formed golf club has characteristics of excellent distributed strength and no partial concentration of applied force, it thus has the accuracy of direction and the ability of control is improved.

A golf shaft has a single, hollow, primary tube, preferably of composite material, wherein tubular "ports" extend through aligned holes on opposite sides of the hollow tube. The ends of the ports are bonded to the walls of the hollow tube. The ports improve the stiffness, strength, comfort, and aesthetics of the golf shaft.

A set (34) of golf clubs (36-54) is provided including a plurality of shafts progressively increasing in length. Each shaft includes a butt section (20) formed of a first material coupled to a tip section (18) formed of a second, different material. The length of each tip section (18) is inversely proportional to the overall length of the shaft (16). As such, the tip sections (18) progressively decrease in length as the plurality of shafts progressively increase in length (Fig. 3).

The invention relates to a golf club shaft made from two parts. The shaft is designed to dampen vibrations and stabilise the club head.

The golf club shaft includes a first member having a first end located at the butt end of the golf club shaft and a second end positioned towards the distal end of the golf club shaft. The shaft further includes a second member secured to the second end of the first member and extending to the distal end of the golf club shaft. The first member is formed from a rigid material offering mechanical consistency and the second member is formed from a vibration absorbing material which absorbs undesirable vibrations.

The present invention relates to a sinter and a casting comprising a high-hardness glassy alloy containing at least Fe and at least a metalloid element and having a temperature interval ΔTx alloy as expressed by ΔTx = Tx - Tg (where, Tx is a crystallization temperature and Tg is a glass transition temperature) of at least 20°C, this property allowing the alloy to be effectively formed into a part with an intricate shape.