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    Golf club head
    53.
    发明授权
    Golf club head 有权

    公开(公告)号：US11045695B2

    公开(公告)日：2021-06-29

    申请号：US16264839

    申请日：2019-02-01

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Patrick Ripp ,  Phill Seagram ,  Mika Becktor ,  Keith Dolezel

    IPC: A63B53/00 ,  A63B53/04 ,  A63B53/06 ,  A63B53/02 ,  A63B60/52 ,  A63B60/54 ,  A63B60/50 ,  A63B102/32 ,  A63B60/02

    Abstract: A golf club head includes a striking face, a sole portion, a top portion, a hosel, a rear surface, a loft no less than 40°, a virtual vertical plane, and a center of gravity. The striking face has a face center, a leading edge, and a virtual striking face plane. The hosel includes an internal bore configured to receive a golf shaft and includes a peripheral side wall and a shaft abutment surface configured to abut a tip end of the golf shaft. The rear surface is opposite the striking face and has an upper portion and a lower portion, the lower portion including a forward-extending recess. The insert covers the recess forming a hollow portion. The virtual vertical plane is perpendicular to the striking face plane and passes through the face center. The center of gravity is spaced a distance from the virtual vertical plane in the heel-to-toe direction.

    Putter-type golf club head
    54.
    发明授权
    Putter-type golf club head 审中-公开

    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.

    Couplings for securing golf shaft to golf club head
    55.
    发明授权
    Couplings for securing golf shaft to golf club head 有权

    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.

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