公开(公告)号：US09403065B2

公开(公告)日：2016-08-02

申请号：US14492803

申请日：2014-09-22

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takashi Nakamura

IPC: A63B53/10 ,  A63B53/00 ,  A63B53/04 ,  B29L31/52

CPC classification number: A63B53/0466 ,  A63B53/00 ,  A63B53/10 ,  A63B60/00 ,  A63B60/42 ,  A63B2053/0408 ,  B29C70/32 ,  B29C70/545 ,  B29K2063/00 ,  B29K2105/0881 ,  B29K2307/04 ,  B29L2031/5227

Abstract: A club 2 includes a head 4, a shaft 6 and a grip 8. A club length L1is equal to or greater than 43 inches and equal to or less than 48 inches. A frequency of the club is equal to or greater than 240 (cpm) and equal to or less than 290 (cpm). A club inertia moment Ix is equal to or greater than 6.90×103 (kg·cm2) and equal to or less than 7.50×103 (kg·cm2). A ratio Iss/Ix is equal to or greater than 0.085 and equal to or less than 0.115. The inertia moment Ix is a club inertia moment about a swing axis Zx. The moment Iss is a shaft inertia moment about the swing axis Zx.

Abstract translation: 球杆2包括头部4，轴6和手柄8.球棒长度L1等于或大于43英寸并且等于或小于48英寸。 俱乐部的频率等于或大于240（cpm），等于或小于290（cpm）。 球杆惯性力矩Ix等于或大于6.90×103（kg·cm2），等于或小于7.50×103（kg·cm2）。 比率Iss / Ix等于或大于0.085且等于或小于0.115。 惯性矩Ix是围绕摆动轴Zx的球杆惯性力矩。 Is是关于摆动轴Zx的轴惯性矩。

公开(公告)号：US09327169B2

公开(公告)日：2016-05-03

申请号：US14492834

申请日：2014-09-22

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takashi Nakamura

IPC: A63B53/00 ,  A63B53/10

CPC classification number: A63B60/00 ,  A63B53/00 ,  A63B53/10 ,  A63B60/42 ,  A63B2209/023

Abstract: A club length L1 of a golf club 2 is equal to or greater than 43 inches and equal to or less than 48 inches. A ratio Iss/Ix is equal to or greater than 0.070 and equal to or less than 0.100. A club inertia moment Ix about a swing axis is equal to or less than 6.90×103 (kg·cm2). The inertia moment Ix (kg·cm2) is calculated by the following formula (1). The shaft inertia moment Iss (kg·cm2) is calculated by the following formula (2). Ix=Wc×(Lc+60)2+Ic  (1) Iss=Ws×(Ls+60)2+Is  (2)

Abstract translation: 高尔夫球杆2的球杆长度L1等于或大于43英寸，等于或小于48英寸。 比率Iss / Ix等于或大于0.070且等于或小于0.100。 围绕摆动轴的球杆惯性力矩Ix等于或小于6.90×10 3（kg·cm 2）。 惯性矩Ix（kg·cm2）由下式（1）计算。 轴惯性矩Iss（kg·cm2）由下式（2）计算。 Ix = Wc×（Lc + 60）2 + Ic（1）Iss = Ws×（Ls + 60）2 + Is（2）

公开(公告)号：US08882607B2

公开(公告)日：2014-11-11

申请号：US13644864

申请日：2012-10-04

Applicant: Dunlop Sports Co. Ltd.

Inventor： Takashi Nakamura ,  Hiroshi Hasegawa ,  Takashi Nakano

IPC: A63B53/00 ,  A63B53/04 ,  A63B59/00 ,  A63B53/14

CPC classification number: A63B60/00 ,  A63B53/00 ,  A63B53/04 ,  A63B53/0466 ,  A63B53/14 ,  A63B60/42 ,  A63B2053/0408 ,  A63B2060/002 ,  A63B2209/02 ,  A63B2209/023

Abstract: Provided is a golf club having a head disposed at a front end of a shaft and a grip disposed at a back end of the shaft. A club weight is not larger than 265 g, and a ratio (head weight/club weight) of a head weight to a club weight is not lower than 0.67 but not higher than 0.75. When a distance from the front end of the shaft to a center of gravity of the shaft is LG and when a full length of the shaft is LS, 0.52≦LG/LS≦0.65 is satisfied, and when a frequency of flexural vibration of the club is F, 180 cpm≦F≦210 cpm is satisfied.

Abstract translation: 提供一种高尔夫球杆，其具有设置在轴的前端的头部和设置在轴的后端的把手。 俱乐部重量不大于265g，头重与球杆重量的比率（头重/球杆重量）不低于0.67但不高于0.75。 当从轴的前端到轴的重心的距离为LG时，当轴的全长为LS时，满足0.52＆nlE; LG / LS＆nlE; 0.65，当弯曲振动的频率 俱乐部是F，180 cpm＆nlE; F＆nlE; 210 cpm满意。