公开(公告)号：US20180229088A1

公开(公告)日：2018-08-16

申请号：US15431004

申请日：2017-02-13

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Patrick RIPP ,  Dan S. NIVANH ,  Mika BECKTOR ,  Jesse D. SUKMAN

IPC: A63B53/04

CPC classification number: A63B53/047 ,  A63B53/04 ,  A63B53/0475 ,  A63B2053/0408 ,  A63B2053/0416 ,  A63B2053/0445 ,  A63B2209/00

Abstract: A method comprising, in a striking face of a golf club head, the striking face being formed of a first material having a first hardness, creating a plurality of initial grooves, the initial grooves having a first cross-sectional area (A1) and a first pitch (P1) such that A1/P1>0.0030 in. The method continues with modifying the initial grooves at least by positioning a second material in each of the plurality of initial grooves, the second material having a second hardness that is less than the first hardness, such that the first material and the second material form a plurality of final grooves each having a second cross-sectional area (A2) and a second pitch (P2) such that A2/P2