Invention Grant
- Patent Title: Golf club
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Application No.: US14950988Application Date: 2015-11-24
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Publication No.: US09901790B2Publication Date: 2018-02-27
- Inventor: Takashi Nakamura
- Applicant: DUNLOP SPORTS CO. LTD.
- Applicant Address: JP Kobe-Shi, Hyogo
- Assignee: DUNLOP SPORTS CO. LTD.
- Current Assignee: DUNLOP SPORTS CO. LTD.
- Current Assignee Address: JP Kobe-Shi, Hyogo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2013-152337 20130723; JP2014-030570 20140220
- Main IPC: A63B53/00
- IPC: A63B53/00 ; A63B53/04 ; A63B60/42 ; A63B53/14 ; A63B53/10

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).
Public/Granted literature
- US20160074718A1 GOLF CLUB Public/Granted day:2016-03-17
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