公开(公告)号：US10688353B2

公开(公告)日：2020-06-23

申请号：US15173145

申请日：2016-06-03

Applicant: Dunlop Sports Co. Ltd.

Inventor： Takahiro Norimura

IPC: A63B53/04

Abstract: An iron-type golf club head having a club face provide with a plurality of grooves extending in the toe-heel direction, satisfies the following conditions (1) the loft angle of the club head is not more than 41 degrees, (2) the thickness of the club head is not more than 23 mm, (3) the height of the club face measured along the club face at the position of the most toe-side end of the grooves is not less than 53 mm, (4) in a standard state of the club head set on a horizontal plane at the lie angle and loft angle specified for the club head, the ratio M/Sh (g sq·cm/mm) of a moment M of inertia (g sq·cm) around a first axis passing through a sweet spot in parallel with the club face and perpendicularly to the grooves, and a sweet spot height Sh (mm) which is the vertical height from the horizontal plane to the sweet spot is not less than 152.

公开(公告)号：US10758791B2

公开(公告)日：2020-09-01

申请号：US15172817

申请日：2016-06-03

Applicant: Dunlop Sports Co. Ltd.

Inventor： Takahiro Norimura

IPC: A63B53/04

Abstract: An iron clubs golf club head 1 comprises a face plate and a head main body supporting a peripheral part of the face plate. The face plate is made of a titanium or a titanium alloy and provided on the club face with grooves. The head main body is made of a metal material having a specific gravity larger than that of the face plate. In a grooved range defined between positions in the toe-heel direction of the most toe-side end and most heel-side end of grooves of the face plate, a distance of at least part of a sole-side edge of the face plate is not more than 2.5 mm when measured from a sole-side profile line of the club head appearing in the front view of the club head, in the up-down direction of the club head.

公开(公告)号：US10029157B2

公开(公告)日：2018-07-24

申请号：US15331295

申请日：2016-10-21

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Yasushi Sugimoto ,  Takahiro Norimura ,  Daisuke Kohno

IPC: A63B53/04 ,  A63B60/54

Abstract: A head 2 includes a head body h1 and a face plate p1 fixed to the head body h1. The face plate p1 includes a plate front surface f1 having a hitting face, a plate back surface b1, and a plate side surface s1. The head body h1 includes a body side surface v1 opposed to the plate side surface s1. A gap gp is provided at at least a part between the plate side surface s1 and the body side surface v1.

公开(公告)号：US09975016B2

公开(公告)日：2018-05-22

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.

公开(公告)号：US09555299B2

公开(公告)日：2017-01-31

申请号：US14970059

申请日：2015-12-15

Applicant: Dunlop Sports Co. Ltd.

Inventor： Takashi Nakamura ,  Takahiro Norimura

IPC: A63B53/04

CPC classification number: A63B53/047 ,  A63B60/02 ,  A63B2053/0408 ,  A63B2053/042 ,  A63B2053/0433 ,  A63B2053/0491

Abstract: An iron-type golf club head comprises an upper heel-side region having a specific gravity ρ1, a lower heel-side region having a specific gravity ρ2, an upper middle region having a specific gravity ρ3, a lower middle region having a specific gravity ρ4, an upper toe-side region having a specific gravity ρ5 and a lower toe-side region having a specific gravity ρ6 which satisfy the following conditions: ρ1

Abstract translation: 铁型高尔夫球杆头包括具有比重ρ1的上跟部侧区域，具有比重ρ2的下跟侧区域，具有比重ρ3的上中间区域，具有比重的下中间区域 ρ4，具有比重ρ5的上趾侧区域和比重ρ6的下趾侧区域满足以下条件：ρ1<ρ2，ρ3<ρ4，ρ5<ρ6，ρ4<ρ2，ρ4<ρ6 ，ρ3<ρ1，ρ3<ρ5。 这六个区域由水平面，脚趾侧垂直平面和后跟侧垂直平面划分。