公开(公告)号：US10238932B2

公开(公告)日：2019-03-26

申请号：US15198867

申请日：2016-06-30

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Mika Becktor ,  Jacob Lambeth

IPC: A63B53/04 ,  A63B53/00

Abstract: A golf club is disclosed that has a golf club head with a face having peaks or ridges and deep grooves or valleys. The deep grooves or valleys promote improved “feel” and/or reduced “smash factor” which may be particularly desirable when the golf club head comprises a putter face. The deep grooves or valleys may eliminate the need for costly soft metal alloy faces and/or polymeric or other resilient inserts between the face and the body of the golf club head.

公开(公告)号：US10668340B2

公开(公告)日：2020-06-02

申请号：US15946961

申请日：2018-04-06

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Jacob Lambeth ,  Mika Becktor

IPC: A63B53/04 ,  B23P15/00 ,  B23C3/34

Abstract: A putter-type golf club head includes a striking face with a plurality of grooves having a variable depth profile and a variable pitch. Groove variation is tailored to correspond to the golf club heads' moment-of-inertia, mass, or another attribute. A surface treatment method includes selecting a variable depth profile and a variable pitch for a plurality of grooves and surface milling a striking face of a golf club head to form the plurality of grooves.

公开(公告)号：US10449422B2

公开(公告)日：2019-10-22

申请号：US15625526

申请日：2017-06-16

Applicant: DUNLOP SPORTS CO., LTD.

Inventor： Mika Becktor ,  Dustin Brekke ,  Jacob Lambeth

IPC: A63B53/02 ,  A63B53/00 ,  A63B60/54 ,  A63B102/32

Abstract: A coupling for securing a golf shaft to a golf club head includes a first component configured to contact, and engage with, the golf shaft, and a second component bonded to the first component and configured to space the first component from the golf club head. The second component includes a second material having a Young's modulus less than a first material of the first component. In another aspect, a coupling includes a shaft engagement element, and a spacer configured to space the first component from the golf club head so that the golf shaft is above the golf club head in its entirety. The spacer includes a material having a Young's modulus no greater than about 10 Gpa. In another aspect, a kit includes a first coupling and a second coupling with at least one of a structural configuration or a material of a vibration dampening element differing.

公开(公告)号：US10335659B2

公开(公告)日：2019-07-02

申请号：US15643247

申请日：2017-07-06

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Yuki Motokawa ,  Naruhiro Mizutani ,  Jacob Lambeth

IPC: A63B53/04 ,  A63B69/36 ,  A63B60/42 ,  A63B60/46 ,  A63B102/32

Abstract: A golf club head having a striking face configured to impact a golf ball comprises the striking face comprising an effective striking area, the effective striking area having an expected COR value, defined by the following expression, not less than 0.810, Expected ⁢ ⁢ COR = ∑ i = 1 n ⁢ ∑ j = 1 m ⁢ p ij * c ij wherein pij is an impact probability at location or region (i, j) within the effective striking area, and cij is a COR value of the location or region (i, j).