公开(公告)号：US20160067564A1

公开(公告)日：2016-03-10

申请号：US14848857

申请日：2015-09-09

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Naoyoshi UEDA ,  Masahiko UEDA ,  Yasushi SUGIMOTO ,  Takashi NAKAMURA ,  Seiji HAYASE ,  Wataru KIMIZUKA

IPC: A63B53/04 ,  A63B53/14

CPC classification number: A63B53/14 ,  A63B53/00 ,  A63B53/10 ,  A63B2209/023

Abstract: A golf club 2 includes a head 4, a shaft 6, and a grip 8. A club inertia moment about a swing axis is defined as Isw. A club inertia moment about a grip end is defined as Ige. Ige is 2820 (kg·cm2) or greater and less than 2870 (kg·cm2). Isw/Ige is equal to or less than 2.42. A club weight is defined as Wc (kg), an axial direction distance from the grip end to a center of gravity of the club is defined as Lc (cm), and a club inertia moment about the center of gravity of the club is defined as Ic (kg·cm2).Isw is calculated by Equation (1) below. Ige is calculated by Equation (2) below. Isw=Wc×(Lc+60)2+Ic  (1) Ige=Wc×(Lc)2+Ic  (2)

Abstract translation: 高尔夫球杆2包括头部4，轴6和把手8.围绕摆动轴线的球杆惯性矩被定义为Isw。 关于握柄端的球杆惯性力矩定义为Ige。 Ige为2820（kg·cm2）以上且小于2870（kg·cm2）。 Isw / Ige等于或小于2.42。 球杆重量被定义为Wc（kg），从球杆的抓握端到重心的轴向距离定义为Lc（cm），并且围绕球杆的重心定义球杆惯性力矩 作为Ic（kg·cm 2）。 Isw由下面的等式（1）计算。 Ige由下式（2）计算。 Isw = Wc×（Lc + 60）2 + Ic（1）Ige = Wc×（Lc）2 + Ic（2）

公开(公告)号：US20140155190A1

公开(公告)日：2014-06-05

申请号：US14094111

申请日：2013-12-02

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takashi NAKAMURA

IPC: A63B53/00

CPC classification number: A63B60/00 ,  A63B53/00 ,  A63B53/0466 ,  A63B53/10 ,  A63B2053/0408 ,  A63B2209/023 ,  A63B2225/02

Abstract: A club 2 includes a head 4, a shaft 6 and a grip 8. A club length L1 is 45 inches or greater and 48 inches or less. A ratio (Wh/Wc) of a head weight Wh to a club weight Wc is equal to or greater than 0.71. A moment of inertia Ix about an axis of a swing is equal to or less than 6.90×103 (kg·cm2). However, when the club weight is defined as Wc (kg); an axial-directional distance between a grip end and a center of gravity of the club is defined as Lc (cm); and a moment of inertia about the center of gravity of the club is defined as Ic (kg·cm2), the moment of inertia Ix (kg·cm2) is calculated by the following formula (1) Ix=Wcx (Lc+60)2+Ic   (1)

Abstract translation: 球杆2包括头部4，轴6和手柄8.球杆长度L1为45英寸或更大且48英寸或更小。 头部重量Wh与俱乐部重量Wc的比（Wh / Wc）等于或大于0.71。 关于摆动轴的惯性矩Ix等于或小于6.90×10 3（kg·cm 2）。 然而，当球杆重量定义为Wc（kg）时; 把手端和球杆的重心之间的轴向距离定义为Lc（cm）; 关于球杆重心的惯性力矩定义为Ic（kg·cm2），惯性力矩Ix（kg·cm2）由下式（1）计算：Ix = Wcx（Lc + 60） 2 + Ic（1）

公开(公告)号：US20130095951A1

公开(公告)日：2013-04-18

申请号：US13644468

申请日：2012-10-04

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takashi NAKAMURA ,  Hiroshi HASEGAWA ,  Takashi NAKANO

IPC: A63B53/04

CPC classification number: A63B53/10 ,  A63B53/00 ,  A63B53/04 ,  A63B53/0466 ,  A63B53/14 ,  A63B60/24 ,  A63B60/42 ,  A63B2053/0408 ,  A63B2053/0412 ,  A63B2209/00 ,  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 290 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 0.72. Furthermore, a grip weight is not smaller than 27 g but not larger than 45 g, and when a distance from the front end of the shaft to a center of gravity the shaft is LG and when a full length of the shaft is LS, 0.54≦LG/LS≦0.65 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290g，头重与球杆重量之比（头重/球杆重量）不低于0.67但不高于0.72。 此外，握把重不小于27g但不大于45g，并且当从轴的前端到重心的距离为轴时，轴为LG，当轴的全长为LS时，为0.54 @ LG / LS @ 0.65满意。

公开(公告)号：US20130095944A1

公开(公告)日：2013-04-18

申请号：US13644831

申请日：2012-10-04

Applicant: Dunlop Sports Co. Ltd.

Inventor： Takashi NAKAMURA ,  Hiroshi HASEGAWA ,  Takashi NAKANO

IPC: A63B53/00

CPC classification number: A63B53/10 ,  A63B53/00 ,  A63B53/0466 ,  A63B53/08 ,  A63B2053/0408 ,  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 290 g. A product of a ratio (head weight/club weight) of a head weight to the club weight, and a ratio (LG/LS) of a distance LG from the front end of the shaft to a center of gravity of the shaft to a full length LS of the shaft, is not smaller than 0.365.

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290克。 头部重量与球杆重量的比率（头部重量/球杆重量）和从轴的前端到轴的重心到距离的距离LG的距离（LG / LS）的乘积 轴的全长LS，不小于0.365。

公开(公告)号：US20130095943A1

公开(公告)日：2013-04-18

申请号：US13644445

申请日：2012-10-04

Applicant: Dunlop Sports Co. Ltd.

Inventor： Takashi NAKAMURA ,  Hiroshi HASEGAWA ,  Takashi NAKANO

IPC: A63B53/00

CPC classification number: A63B60/00 ,  A63B53/00 ,  A63B53/0466 ,  A63B60/42 ,  A63B2053/0408 ,  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 smaller than 290 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 0.72. 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, 0.55≦LG/LS≦0.67 is satisfied, and when a frequency of flexural vibration of the club is F, 240 cpm≦F≦280 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。 俱乐部重量不小于290g，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0.72。 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0.55 @ LG / LS @ 0.67，并且当弯曲振动的频率为 俱乐部是F，240 cpm @ F @ 280 cpm满意。