US Patent 7094159 Golf club and method for manufacturing the same

The partial crown portion member comprises: the edge frame made from metal; the shell body made from metal and provided inwardly of the edge frame; the joining member made from resin and provided in between the inner edge of the edge frame and the edge of the shell body so as to envelop the inner edge of the edge frame and the edge of the shell body. The inner edge of the edge frame is formed with the first through-hole, while the edge of the shell body is formed with the second through-hole. The joint member made from resin envelops the portion where the inner edge of the edge frame and the edge of the shell body by casting manner. Accordingly, the edge frame and the shell body made from different kinds of metals can be strongly joined.