Invention Grant
- Patent Title: Golf club
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Application No.: US14811456Application Date: 2015-07-28
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Publication No.: US09623290B2Publication Date: 2017-04-18
- Inventor: Takashi Nakamura
- Applicant: DUNLOP SPORTS CO. LTD.
- Applicant Address: JP Kobe-Shi
- Assignee: DUNLOP SPORTS CO. LTD.
- Current Assignee: DUNLOP SPORTS CO. LTD.
- Current Assignee Address: JP Kobe-Shi
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2012-263914 20121203
- Main IPC: A63B53/10
- IPC: A63B53/10 ; A63B53/00 ; A63B53/14 ; A63B53/04

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=Wc×(Lc+60)2+Ic (1)
Public/Granted literature
- US20150328507A1 GOLF CLUB Public/Granted day:2015-11-19
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