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公开(公告)号：US08858355B2
公开(公告)日：2014-10-14
申请号：US13644949
申请日：2012-10-04
Applicant: Dunlop Sports Co., Ltd.
Inventor： Takashi Nakamura , Hiroshi Hasegawa , Takashi Nakano
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 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 an inertia moment of the club at a grip end is MI, 2700 kg·cm2≦MI≦3000 kg·cm2 is satisfied, and when a frequency of flexural vibration of the club is F, 190 cpm≦F≦230 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。 当握柄端的球杆的惯性力矩为MI时，满足2700 kg·cm2＆nlE; MI＆nlE; 3000 kg·cm2，当球杆的弯曲振动频率为F时，满足190 cpm＆nlE; F＆nlE; 230 cpm 。
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公开(公告)号：US10016663B2
公开(公告)日：2018-07-10
申请号：US15199317
申请日：2016-06-30
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Takashi Nakamura
IPC: A63B53/10 , A63B53/00 , A63B53/04 , A63B60/42 , B29L31/52 , B29C70/32 , B29C70/54 , B29K63/00 , B29K105/08 , B29K307/04
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 L1 is 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.
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公开(公告)号：US20180111026A1
公开(公告)日：2018-04-26
申请号：US15849170
申请日：2017-12-20
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Takashi Nakamura
CPC classification number: A63B53/0466 , A63B53/00 , A63B53/10 , A63B53/14 , A63B60/00 , A63B60/42 , A63B2209/023
Abstract: A club includes a head, a shaft, and a grip. A club length L1 is 43 inches or greater and 48 inches or less. A ratio (Wh/Wc) between a head weight Wh and a club weight Wc is equal to or greater than 0.70. An inertia moment Ix about swing axis is 6.90×103 (kg ·cm2) or greater and 7.50×103 (kg·cm2) or less. A static moment Mt (kg·cm) of the club is equal to or greater than 16.3 (kg·cm). The frequency of vibration of club is 240 (cpm) or greater and 280 (cpm) or less. The inertia moment Ix (kg·cm2) is calculated by Equation (1): Ix=Wc×(Lc+60)2+Ic (1).
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公开(公告)号：US09901790B2
公开(公告)日：2018-02-27
申请号：US14950988
申请日：2015-11-24
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Takashi Nakamura
CPC classification number: A63B53/0466 , A63B53/00 , A63B53/10 , A63B53/14 , A63B60/00 , A63B60/42 , A63B2209/023
Abstract: A club includes a head, a shaft, and a grip. A club length L1 is 43 inches or greater and 48 inches or less. A ratio (Wh/Wc) between a head weight Wh and a club weight Wc is equal to or greater than 0.70. An inertia moment Ix about swing axis is 6.90×103 (kg·cm2) or greater and 7.50×103 (kg·cm2) or less. A static moment Mt (kg·cm) of the club is equal to or greater than 16.3 (kg·cm). The frequency of vibration of club is 240 (cpm) or greater and 280 (cpm) or less. The inertia moment Ix (kg·cm2) is calculated by Equation (1): Ix=Wc×(Lc+60)2+Ic (1).
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公开(公告)号：US09795841B2
公开(公告)日：2017-10-24
申请号：US14849148
申请日：2015-09-09
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Naoyoshi Ueda , Masahiko Ueda , Yasushi Sugimoto , Takashi Nakamura , Seiji Hayase , Wataru Kimizuka
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 2920 (kg·cm2) or greater and less than 2970 (kg·cm2). Isw/Ige is equal to or less than 2.48. 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)
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Patent Agency Ranking
公开(公告)号：US09119994B2
公开(公告)日：2015-09-01
申请号：US14094111
申请日：2013-12-02
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Takashi Nakamura
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）; 并且关于球杆重心的惯性矩被定义为Ic（kg·cm 2），惯性矩Ix（kg·cm2）由下式（1）计算。 Ix = Wcx（Lc + 60）2 + Ic（1）
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公开(公告)号：US09039542B2
公开(公告)日：2015-05-26
申请号：US13644831
申请日：2012-10-04
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Takashi Nakamura , Hiroshi Hasegawa , Takashi Nakano
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。
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公开(公告)号：US10420988B2
公开(公告)日：2019-09-24
申请号：US14736688
申请日：2015-06-11
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Takashi Nakamura
Abstract: A club 2 includes a head 4, a shaft 6, and a grip 8. A club length L1 is 43 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 0.66. An inertia moment Ix about a swing axis is 7.20×103 (kg·cm2) or greater and 7.50×103 (kg·cm2) or less. A static moment Mt (kg·cm) of the club is equal to or greater than 16.0 (kg·cm). The inertia moment Ix (kg·cm2) is calculated by the following formula (1). Lc is an axial-directional distance between a grip end and a center of gravity of the club. Ix=Wc×(Lc+60)2+Ic (1)
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公开(公告)号：US09776055B2
公开(公告)日：2017-10-03
申请号：US14848999
申请日：2015-09-09
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Naoyoshi Ueda , Masahiko Ueda , Yasushi Sugimoto , Takashi Nakamura , Seiji Hayase , Wataru Kimizuka
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 2870 (kg·cm2) or greater and less than 2920 (kg·cm2). Isw/Ige is equal to or less than 2.46. 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)
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公开(公告)号：US09682292B2
公开(公告)日：2017-06-20
申请号：US14937664
申请日：2015-11-10
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Takashi Nakamura
CPC classification number: A63B53/0466 , A63B53/00 , A63B53/10 , A63B53/14 , A63B60/42 , A63B2209/023
Abstract: The club length of a golf club is 43 inches or greater and 48 inches or less. A club inertia moment Ix about a swing axis is equal to or less than 6.90×103 (kg·cm2). A ratio (Ihs/Ix) is equal to or greater than 0.88, if a head inertia moment about the swing axis is defined as Ihs (kg·cm2). The inertia moment Ix (kg·cm2) is calculated by Equation (1) below, and the inertia moment Ihs (kg·cm2) is calculated by Equation (2) below: Ix=Wc×(Lc+60)2+Ic (1) Ihs=Wh×(Lh+60)2+Ih (2).
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