GOLF CLUB HEAD HAVING A DEVICE FOR RESISTING EXPANSION BETWEEN OPPOSING WALLS DURING BALL IMPACT

摘要

An improved golf driver club head wherein each driver club head has a tensioning device which places the peripheral/outer structure of the club head in compression thereby resulting in a stronger more rigid club head structure. This is accomplished by affixing the tensioning device to the crown (top) surface of the club head and to the sole (bottom) surface of the metal head. The device is affixed to the two surfaces of the club head and is pre-tensioned. The tensioning may be accomplished by compressing the two club head surfaces together then affixing the device to the opposed surfaces so that the surfaces are held in state of relative compression. Another way this can be accomplished is to affix the device to the two club head surfaces either through a hole or boss and to adjust the device by threading, gluing or other form of fastening. In the preferred embodiment the tensioning device comprises an elongated cylindrical member having respective end members. The top and bottom surfaces of the golf club head are each provided with a cylindrical depression or recess and an aperture or passage at the lower end of the depression. The passages are just large enough to accommodate the tensioning device, but are too small to pass the respective end members. During club head manufacture, the length of the device is selected to apply a compressive force between the head surfaces. Fine adjustment is accommodated by a threaded end member. The actual compression force may be selected to yield the best performance depending on the geometry, structure and material of the club head.