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    Golf club head
    71.
    发明授权
    Golf club head 有权

    公开(公告)号：US09724574B2

    公开(公告)日：2017-08-08

    申请号：US14649110

    申请日：2013-10-18

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Kazuhiro Hayashi

    IPC: A63B53/04

    CPC classification number: A63B53/0466 ,  A63B53/04 ,  A63B60/00 ,  A63B2053/0433

    Abstract: A sole surface f8 of a head 2 includes a first sole region R1. An outer edge of the region R1 includes a first edge line Eg1, a second edge line Eg2, a third edge line Eg3, and a fourth edge line Eg4. The line Eg1 is inclined so as to come closer to a face surface toward a toe side. The line Eg2 is inclined so as to come closer to the face surface toward a heel side. The line Eg3 is inclined so as to come closer to the face surface toward the heel side. The line Eg4 is inclined so as to come closer to the face surface toward the toe side. The lines Eg1 to Eg4 are joined to form a single line.

    Method and computer-readable storage medium for fitting tennis racket and analysis device
    72.
    发明授权
    Method and computer-readable storage medium for fitting tennis racket and analysis device 有权

    公开(公告)号：US09717967B2

    公开(公告)日：2017-08-01

    申请号：US13651825

    申请日：2012-10-15

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Yosuke Yamamoto

    IPC: G06F17/00 ,  A63B60/42 ,  A63B59/00 ,  G09B19/00

    CPC classification number: A63B60/42 ,  G06F17/00 ,  G09B19/0038

    Abstract: A tennis racket fitting method according to the present invention comprises: a first step of preparing a plurality of test tennis rackets, at least one type of racket property that influences swing for hitting a ball being defined for each of the test tennis rackets; a second step of causing a reference tennis racket to be swung at least one time by a user in order to hit a tennis ball, and acquiring a measured value by measuring transition in at least one of the position, the velocity, the acceleration, and the angular velocity of the reference tennis racket in at least a portion of an interval from when the swing starts until when the swing ends; a third step of calculating at least one evaluation indicator to be an evaluation of the swing of the reference tennis racket based on the measured value; and a fourth step of, based on the racket property, selecting a tennis racket that can improve at least one evaluation indicator from among the test tennis rackets.

    Golf ball
    73.
    发明授权
    Golf ball 有权

    公开(公告)号：US09707452B2

    公开(公告)日：2017-07-18

    申请号：US14919303

    申请日：2015-10-21

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Kohei Mimura ,  Takahiro Sajima

    IPC: A63B37/14 ,  A63B37/00

    CPC classification number: A63B37/0018 ,  A63B37/0006 ,  A63B37/0016 ,  A63B37/0017 ,  A63B37/0019 ,  A63B37/002 ,  A63B37/0021

    Abstract: A golf ball has a large number of dimples 10 on a surface thereof. The dimples 10 include a plurality of small dimples 10S each having an area of less than 8.0 mm2, and a plurality of large dimples 10L each having an area of equal to or greater than 8.0 mm2. A ratio PS of a sum of areas of all the small dimples 10S to a surface area of a phantom sphere of the golf ball is less than 2.0%. The number NL of the large dimples 10L is equal to or greater than 250 but less than 450. The number NL of the large dimples 10L and a degree G of uniformity of areas of the large dimples 10L satisfy the following mathematical formula (II): G

    Putter-type golf club head
    74.
    发明授权
    Putter-type golf club head 有权

    公开(公告)号：US09694259B2

    公开(公告)日：2017-07-04

    申请号：US14166289

    申请日：2014-01-28

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Nick Trahan ,  Thomas Carlson ,  Chris Cooper ,  Adam Sheldon

    IPC: A63B53/04

    CPC classification number: A63B53/0487 ,  A63B2053/0408 ,  A63B2053/0412 ,  A63B2053/0441

    Abstract: A putter-type golf club head that, when oriented in a reference position, includes a striking wall extending in the heel to toe direction and defines a substantially planar striking surface for hitting a golf ball. A central elongate member is in communication with, and extends rearward from, the striking wall. An upper surface of the central elongate member includes a plurality of alignment elements. At least one of the plurality of alignment elements has a parallel visual indicator section, at least a portion of which extends substantially parallel to the striking surface. The width of the at least one of the plurality of alignment elements is substantially equivalent to the diameter of a golf ball.

    GOLF CLUB HEAD
    75.
    发明申请
    GOLF CLUB HEAD 有权

    公开(公告)号：US20170173410A1

    公开(公告)日：2017-06-22

    申请号：US15385267

    申请日：2016-12-20

    Applicant: DUNLOP SPORTS CO. LTD.

    Inventor： Takashi NAKAMURA ,  Takahiro NORIMURA ,  Naruhiro MIZUTANI ,  Daisuke KOHNO

    IPC: A63B53/04

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

    Abstract: A head 2 includes a head body h1 and a face plate p1. The face plate p1 includes a plate front surface f1 having a hitting face 4, and a plate back surface b1. The plate front surface f1 has, on a peripheral edge part thereof, a step surface t1 positioned at a rear with respect to the hitting face 4. The head body h1 has a receipt surface u1 positioned at a rear of the plate back surface b1, a front disposition part z1 positioned at a front of the step surface t1, and a hosel 6. The front disposition part z1 includes a plastically deformed part d1 and a non-plastically deformed part n1. A clearance between the non-plastically deformed part n1 and the receipt surface u1 forms an engaging part E1 engaging a peripheral edge part of the face plate p1.

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