发明名称 Golf club
摘要 A golf club 2 includes a shaft 6 and a head 4. When a shaft full length is defined as Ls, and a distance between a tip end Tp of the shaft and a center of gravity G of the shaft is defined as Lg, a ratio (Lg/Ls) is 0.52 or greater and 0.65 or less. When a club length is defined as X inch and a club weight is defined as Y gram, the golf club 2 satisfies the following relational expression (1). Y≦−7.62X+635   (1);Preferably, the distance Lg is 615 mm or greater and 660 mm or less. Preferably, a shaft weight Ws is equal to or less than 52 g. Preferably, the club length X is equal to or less than 46 inch.
申请公布号 US9079083(B2) 申请公布日期 2015.07.14
申请号 US201213474242 申请日期 2012.05.17
申请人 DUNLOP SPORTS CO. LTD. 发明人 Hasegawa Hiroshi;Nakano Takashi;Sugimoto Yasushi
分类号 A63B53/10;A63B59/00 主分类号 A63B53/10
代理机构 Birch, Stewart, Kolasch & Birch, LLP 代理人 Birch, Stewart, Kolasch & Birch, LLP
主权项 1. A golf club comprising: a shaft having a tip end, a butt end and a butt partial layer; and a head, wherein if the shaft full length is defined as Ls, and a distance between the tip end of the shaft and a center of gravity G of the shaft is defined as Lg, then Lg/Ls is 0.52 or greater and 0.65 or less; and wherein if a point separated by 250 mm from the butt end is defined as P2; a range from the point P2 to the butt end is defined as a specific butt range; a weight of the butt partial layer existing in the specific butt range is defined as Wa; and a weight of the shaft in the specific butt range is defined as Wb, then Wa/Wb is 0.4 or greater and 0.7 or less; and if the club length is defined as X inches and the club weight is defined as Y grams, the following relational expression (1) is satisfied: Y≦−7.62X+635   (1).
地址 Kobe-Shi JP