Source: https://patents.google.com/patent/JP6303156B1/en
Timestamp: 2019-11-22 11:07:23
Document Index: 264227376

Matched Legal Cases: ['art 4', 'art 2', 'art 1', 'art 2', 'art 3', 'art 1', 'art 2', 'art 3', 'art 1', 'art 31', 'art 31', 'art 3', 'art 3', 'art 3', 'art 16', 'art 2', 'art 3', 'art 31', 'art)\n4']

JP6303156B1 - Golf club head - Google Patents
JP6303156B1
JP6303156B1 JP2016255813A JP2016255813A JP6303156B1 JP 6303156 B1 JP6303156 B1 JP 6303156B1 JP 2016255813 A JP2016255813 A JP 2016255813A JP 2016255813 A JP2016255813 A JP 2016255813A JP 6303156 B1 JP6303156 B1 JP 6303156B1
JP2016255813A
JP2018102857A (en
成宏 水谷
2016-12-28 Application filed by 住友ゴム工業株式会社 filed Critical 住友ゴム工業株式会社
2016-12-28 Priority to JP2016255813A priority Critical patent/JP6303156B1/en
2018-04-04 Publication of JP6303156B1 publication Critical patent/JP6303156B1/en
2018-07-05 Publication of JP2018102857A publication Critical patent/JP2018102857A/en
A golf club head capable of improving the resilience performance while suppressing a decrease in durability of a face portion. A golf club head according to the present invention includes a face portion, a crown portion, and a sole portion, and the face portion has a thin portion at a peripheral edge on a toe side. Has an easily deformable portion extending in the toe-heel direction at least on the heel side. [Selection] Figure 2
Many improvements have conventionally been made on the head of a wood-type golf club, and in particular, various proposals have been made for a face portion for hitting a ball. Generally, the central region of the face portion hits the ball most, so that the wall thickness is increased and the mechanical strength is improved. On the other hand, the region from the central region to the toe side or the heel side is thinner than the central region, thereby improving the resilience performance. For example, in the golf club disclosed in Patent Document 1, thin portions are formed on the periphery of the toe side and the heel side of the face portion, and the region having high resilience performance is extended to the toe side and the heel side.
Japanese Patent No. 5583827
However, in the golf club as described above, although the resilience performance on the toe side and the heel side can be improved, the thin portions are formed on both sides of the face portion in the toe-heel direction, so that the durability is reduced. There was a problem. The present invention has been made to solve the above problems, and an object of the present invention is to provide a golf club head capable of improving the resilience performance while suppressing a decrease in durability of the face portion.
A golf club head according to the present invention includes a face portion, a crown portion, and a sole portion, and the face portion has a thin portion at a peripheral portion on a toe side, and the sole portion includes at least a heel. On the side, it has an easily deformable portion extending in the toe-heel direction.
In the golf club head, the easily deformable portion may be configured to extend from near the heel side end of the sole portion to near the center in the toe-heel direction.
In the golf club head, the easily deformable portion may be formed by a groove portion, and the depth of the groove may become shallower from the heel side toward the toe side.
In each of the golf club heads, the easily deformable portion can be formed at a position within 25 mm from the face portion in the face-back direction.
In each of the golf club heads, the thin portion of the face portion is formed to have a bent shape in which a first portion along the crown portion side and a second portion along the sole portion side are connected. Can do.
In each of the golf club heads, when the golf club head is viewed in the back direction from the face part side, the thin part of the face part and the easily deformable part of the sole part sandwich the center of the face part. It can arrange | position so that it may oppose.
In each of the golf club heads, the crown portion includes a first peripheral region along the face portion and a first main body region, and the sole portion includes a second peripheral region along the face portion, A golf club head main body having an opening surrounded by the two main body regions, the first main body region of the crown portion and the second main body region of the sole portion, The face member is constituted by the portion, the first peripheral region, and the second peripheral region, and the first and second peripheral regions of the face member are joined to the opening peripheral edge of the golf club head body. The golf club head is formed, and the easily deformable portion is formed in the second main body region.
According to the golf club head of the present invention, it is possible to improve the resilience performance while suppressing a decrease in the durability of the face portion.
It is a perspective view of the standard state of the golf club head concerning this embodiment. It is a top view of FIG. It is the sectional view on the AA line of FIG. It is a figure explaining the boundary of a face part. It is a figure explaining the boundary of a face part. It is the rear view which looked at the inner surface of the face part from the back side. It is a top view of a sole part. It is a front view which shows the state of the head at the time of a hit | damage. It is a top view of the flat plate which comprises the member for faces. It is the BB sectional view taken on the line of FIG. 8A.
Hereinafter, an embodiment of a golf club head according to the present invention will be described with reference to the drawings.
<1. Overview of golf club head>
1 is a perspective view of the golf club head, FIG. 2 is a plan view of the head in a reference state, and FIG. 3 is a cross-sectional view taken along line AA of FIG. As shown in FIG. 1, this golf club head (hereinafter sometimes simply referred to as “head”) 100 has a hollow structure having an internal space, and includes a face portion 1, a crown portion 2, a sole portion 3, and a hosel portion. 4 is a wood-type golf club head having a wall surface formed by 4. Specifically, it can be applied to golf club heads such as utilities, fairway woods, and drivers.
The face portion 1 has a face surface that is a surface for hitting a ball, and the crown portion 2 is adjacent to the face portion 1 and constitutes the upper surface of the head 100. The sole portion 3 mainly constitutes the bottom surface of the head 100 and constitutes the outer peripheral surface of the head 100 other than the face portion 1 and the crown portion 2. That is, in addition to the bottom surface of the head 100, a portion extending from the toe side of the face portion 1 to the heel side of the face portion 1 through the back side of the head is also a part of the sole portion 3. Further, the hosel part 4 is a part provided adjacent to the heel side of the crown part 2 and has an insertion hole 41 into which a shaft (not shown) of a golf club is inserted. The center axis Z of the insertion hole 41 coincides with the axis of the shaft.
Here, a reference state when the golf club head 100 is installed on the ground will be described. First, as shown in FIG. 2, a state in which the central axis Z is included in a plane P1 perpendicular to the ground and the head is placed on the ground at a predetermined lie angle and real loft angle is defined as a reference state. Stipulate. The plane P1 is referred to as a reference vertical plane. In addition, as shown in FIG. 2, the direction of intersection between the reference vertical plane P1 and the ground is referred to as a toe-heel direction, and a direction perpendicular to the toe-heel direction and parallel to the ground is defined as a toe-heel direction. The face-back direction will be referred to.
In the present embodiment, the boundary between the face portion 1 and the crown portion 2 and between the face portion 1 and the sole portion 3 can be defined as follows. That is, when a ridge line is formed between the two, this becomes a boundary. On the other hand, when a clear ridge line is not formed, as shown in FIG. 4A, in each of the cross sections E1, E2, E3... Including the straight line N connecting the head gravity center G and the sweet spot SS, it is shown in FIG. As shown, the position Pe at which the radius of curvature r of the outer contour line Lf of the face becomes 200 mm for the first time from the sweet spot side toward the outer side of the face is the peripheral edge of the face part 1, which is defined as the boundary with the crown part 2 or the sole part 3 Is done. The sweet spot SS is an intersection of a normal line (straight line N) of the face surface passing through the head center of gravity G and the face surface.
In the present embodiment, the boundary between the crown portion 2 and the sole portion 3 can be defined as follows. That is, when a ridge line is formed between the crown portion 2 and the sole portion 3, this becomes a boundary. On the other hand, when a clear ridge line is not formed between them, the head is placed in a reference state, and the contour when viewed from directly above the center of gravity of the head 100 is the boundary.
The head 100 can be formed of, for example, a titanium alloy (Ti-6Al-4V, Ti-8Al-1Mo-1V, etc.) having a specific gravity of about 4.3 to 4.5. In addition to the titanium alloy, it can be formed using one or more of stainless steel, maraging steel, aluminum alloy, magnesium alloy, amorphous alloy, and the like.
Further, the volume of the golf club head 100 is desirably 90 cm 3 or more and 460 cm 3 or less, for example.
<2. Structure of face part>
Next, the face portion 1 will be described with reference to FIG. FIG. 5 is a rear view of the inner surface of the face portion as viewed from the back side. As shown in FIGS. 3 and 5, the face facing the outside in the face portion 1 is formed in a flat shape, but the surface facing the inside is uneven. Thereby, the face part 1 is comprised by the some area | region from which thickness differs. As shown in FIG. 5, the face portion 1 is provided with a substantially rectangular central region 11 in the vicinity of the center in the vertical direction and the horizontal direction (toe-heel direction). And the 1st transition area | region 12 from which thickness changes is formed so that this center area | region 11 may be enclosed. In addition, a second transition region 13 whose thickness changes so as to surround the first transition region 12 is formed. Further, a toe peripheral region 14 and a heel peripheral region 15 having a constant thickness are formed on the toe side and the heel side of the second transition region 13, respectively, and these peripheral regions 14, 15 reach the periphery of the face portion 1. It extends. Furthermore, a V-shaped thin portion 16 is formed at the toe side edge of the toe side peripheral region 14.
The central region 11 is a region having the largest wall thickness, and the wall thickness is preferably 3.0 to 4.2 mm, for example, and more preferably 3.4 to 3.8 mm. The central region 11 is formed in a substantially rectangular shape, and its long side extends in a direction connecting the toe side lower part and the heel side upper part. The first transition region 12 is formed such that the thickness gradually decreases as the distance from the central region 11 increases, and the thickness can be, for example, 2.8 to 3.4 mm. Further, like the central region 11, the outer edge is formed in a substantially rectangular shape, and the direction thereof is substantially the same as that of the central region 11.
The second transition region 13 is formed such that the thickness gradually decreases as the distance from the first transition region 12 increases, and the thickness can be, for example, 1.8 to 2.6 mm. . Further, the outer edge of the second transition region 13 is formed in a substantially rectangular shape, and the upper and lower corner portions are in contact with the edge portion of the face portion 1. In addition, these upper and lower corners are generally located in the direction in which the long side of the central region 11 extends. On the other hand, the other two corners of the second transition region 13 are disposed on the toe side and the heel side.
Both the peripheral regions 14 and 15 are disposed on the toe side and the heel side with respect to the second transition region 13, respectively, and the thickness thereof can be set to 1.5 to 2.4 mm, for example. The heel side peripheral area 15 extends between the second transition area 13 and the peripheral edge of the face portion 1 on the heel side. On the other hand, the toe side peripheral region 14 extends between the second transition region 13 and the peripheral edge of the face portion 1 on the toe side, but the toe side corner portion 18 of the face portion 1, that is, the crown portion 2 and the sole portion. in a portion 3 and is consolidated, it is further formed a small thin portion 16 thicker than toe-side edge region 14.
The thin portion 16 is formed in a V shape in which the first portion 161 along the crown portion 2 and the second portion 162 along the sole portion 3 are connected at the edge of the face portion 1. More specifically, the first portion 161 extends between the toe-side corner 18 of the face portion 1 and the upper-side corner of the second transition region 13, but is in contact with the second transition region 13. Absent. On the other hand, the second portion 162 extends from the corner 18 on the toe side of the face portion 1 to the lower corner of the second transition region 13, but does not contact the second transition region 13. For example, the thickness of the thin portion 16 is preferably 1.0 to 1.8 mm, and more preferably 1.2 to 1.6 mm. In addition, the numerical value regarding the above thickness is an example, and is a numerical value suitable especially when the golf club head is a driver. Therefore, in the case of a golf club head other than the driver, for example, it can be made smaller than the above numerical value.
<3. Sole structure>
Next, the face portion 1 will be described with reference to FIG. FIG. 6 is a plan view of the sole portion. As shown in the figure, the sole portion 3 is formed with a plurality of irregularities for reasons such as design. In particular, in the present embodiment, the groove portion 31 extending in the toe heel direction on the face portion 1 side. Is formed. Further, a hexagonal concave portion 32 is formed near the edge of the sole portion 3 on the back side of the groove portion 31, and a weight (not shown) is arranged in the concave portion 32.
The groove portion 31 extends from the vicinity of the heel side end portion of the sole portion 3 to the vicinity of the center in the toe-heel direction. The width W of the groove 31 gradually decreases from the heel side toward the toe side, and the width W can be set to, for example, 2.0 to 15.0 mm. Further, the depth D of the groove portion 31 is gradually shallower from the heel side toward the toe side. For example, the depth D can be 0.8 to 3.0 mm at the deepest point.
The groove portion 31 extends substantially parallel to the edge portion of the sole portion 3 on the face portion 1 side, and the distance S from the face portion 1 can be 25.0 mm or less. This contributes to the improvement of the resilience performance of the face portion 1 as will be described later. However, when a cup face structure described later is employed, the cup face structure can be disposed on the back side of the joining position between the peripheral edge portion 19 of the face member 102 and the sole portion 3 of the head main body 101.
<4. Assembly structure of golf club head>
As shown in FIG. 3, the golf club head 100 according to the present embodiment is formed in a cup shape having a head body 101 having a crown portion 2 and a sole portion 3, a face portion 1 and a peripheral edge portion 19 extending from the peripheral edge thereof. The face member 102 is assembled. The head body 101 has an opening 17 surrounded by the crown portion 2 and the sole portion 3, and a face member 102 is attached so as to close the opening 17. That is, the end surface of the peripheral edge portion 19 of the face member 102 is abutted with the end surface of the opening 17 of the head main body 101, and these are joined by welding (so-called cup face structure). The face member 102 is integrated with the head main body 101 by being attached to the edge of the opening 17 of the head main body 101, whereby the peripheral edge portion 19 of the face member 102 is integrated with the crown portion 2 of the head 100. And functions as a part of the sole portion 3.
Accordingly, the peripheral surface (first peripheral region and second peripheral region) 19 of the face member 102 is integrally formed by attaching the peripheral portion 19 (first peripheral region and second peripheral region) to the head main body 101, so Configure. Therefore, strictly speaking, the crown portion (first body region) 2 and the sole portion (second body region) 3 of the head main body 101 are part of the crown portion 2 and the sole portion 3 of the head 100. In the book, the respective parts of the head main body 101 may be simply referred to as the crown part 2 and the sole part 3 without distinguishing between them.
<5. Manufacturing method of golf club head>
Next, an example of a method for manufacturing the above golf club head will be described. First, the head main body 101 and the face member 102 described above are prepared. The head main body 101 and the face member 102 can be manufactured by various methods. For example, the head body 101 can be manufactured by casting such as a known lost wax precision casting method. The face member 102 can be manufactured by, for example, a forging method, flat plate pressing, casting, or the like. Further, the flat plate before processing of the face member 102 used at this time is processed so that the rolling direction substantially coincides with the direction from the upper part on the toe side to the lower part on the heel side of the face part 1.
And after joining these by welding (TIG (tungsten-inert gas) welding, plasma welding, laser welding, brazing, etc.), for example, when predetermined coating is performed, a golf club head is completed.
<6. Features>
(1) In this embodiment, since the thin portion 16 is formed at the toe side edge of the face portion 1, the toe side bending in the face portion 1 can be excited and the resilience performance can be improved. In particular, since the thin portion 16 is formed in a V shape, the deflection can be excited in a region surrounded by the V shape, that is, a region toward the central region 11 that is the center of the face portion 1. It is possible to improve the resilience performance at a portion from the corner 18 on the toe side of the portion 1 toward the central region 11. However, the thin portion 16 is formed on the face portion 1 only on the toe side, and is not formed on the heel side. This prevents the durability of the face portion 1 from being lowered.
The sole portion 3 is formed with a groove portion 31 extending in the toe-heel direction, so that when the ball is hit with the face portion 1, the sole portion 3 can be bent in the face-back direction. Therefore, the resilience performance can be improved. In particular, since the groove portion 31 is disposed on the heel portion side, the resilience performance on the heel side of the face portion 1 can be improved.
As described above, in this embodiment, the rebound performance on both the toe side and the heel side of the face portion 1 can be improved by the thin portion 16 of the face portion 1 and the groove portion 31 of the sole portion 3. That is, a region having high resilience performance can be expanded from the central region 11 to the toe side and the heel side. On the other hand, since the thin portion 16 is formed only on the toe side in the face portion 1, it is possible to prevent the durability of the face portion 1 from being lowered. In the present embodiment, the face portion 1 is formed with a cup face structure, and the face member 102 and the head main body 101 are formed as separate members. Since the head main body 101 is not required to be as durable as the face portion 1, there is no problem in durability even if the groove portion 31 is formed in the sole portion 2 of the head main body 101.
(2) As described above, the groove portion 31 is disposed on the heel side, the width is narrowed toward the toe side, and the depth is small. Therefore, the improvement of the resilience performance by the groove part 31 appears mainly on the heel side. Thereby, the following effect can be acquired. For example, if the width of the groove portion 31 is increased or deepened to a position immediately below the central region 11 of the face portion 1, the resilience performance may increase to this portion. However, the region extending up and down across the central region 11 of the face portion 1 is a region where the distance is originally long, so that repulsion is likely to be obtained. Therefore, the width and depth of the groove 31 are adjusted as described above so that the improvement of the resilience performance in this region does not become excessively large. As a result, an excessive improvement in the resilience performance near the center of the face portion 1 in the toe-heel direction is suppressed and the resilience performance on the heel side is improved. Can do.
(3) The thin portion 16 of the face portion 1 and the groove portion 31 of the sole portion 3 are disposed so as to face each other with the central region 11 in between when the face portion 1 is viewed from the front side toward the back side. As a result, a region having high resilience performance is formed from the upper portion on the toe side of the face portion 1 toward the lower portion on the heel side of the face portion 1. This region will be referred to as a high repulsion region Z. This has the following advantages.
Golf clubs tend to bend during the swing, and the toe side of the head tends to drop slightly. Therefore, the ball is hit with the head toe side lowered and the heel side raised. As a result, the high repulsion region Z formed as described above is arranged in a direction approaching the horizontal direction as shown in FIG. 7 at the time of hitting (however, FIG. It exaggerates so that the high repulsion area Z faces the horizontal direction). Therefore, it is possible to cover the variation of the hit points in the horizontal direction of the golfer, and it is possible to hit in the high repulsion area Z even if hitting at any position. Therefore, even if the hit point deviates from the central region 11, the ball can be hit with high repulsion. As a result, variation in flight distance due to variation in hitting points can be suppressed.
(4) Generally, a flat plate formed by rolling is easily bent in a direction (arrow) perpendicular to the rolling direction, as shown in FIG. 8B. Therefore, as described above, when the rolling direction of the flat plate of the face member 102 is substantially coincident with the direction in which the high repulsion region Z extends, the rebound performance in the high repulsion region can be further improved.
(5) Since the groove part 31 is formed in the sole part 3, the surface area of the sole part 3 becomes large, and as a result, the weight of the sole part 3 can be increased. In particular, since the weight on the heel side can be increased, the center of gravity of the head can be moved to the heel side of the sole portion 3. As a result, the head can be easily rotated around the shaft axis during a swing, and the face surface can be easily returned to a square on the target line during an impact. Therefore, it becomes easy to fly the hit ball in the target direction.
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning. The following modifications can be combined as appropriate. For example, the following changes can be made.
<7-1>
In the above embodiment, the groove portion 31 is formed in the sole portion 3 to improve the resilience performance of the face portion 1, but the easily deformable portion according to the present invention can be configured with other configurations. . For example, a thin portion extending in the toe-heel direction can be formed at the same position as the groove portion 31. Such a thin-walled portion can be formed by denting the outer wall surface, the inner wall surface, or both of the sole portion 3.
Alternatively, the easily deformable portion of the present invention can be formed by forming a through hole at a position where the groove portion is formed and embedding a deformable member in the through hole.
<7-2>
The position and length of the easily deformable portion of the sole portion 3 are not particularly limited as long as they are disposed at least on the heel side. Therefore, it can be provided up to the center in the toe-heel direction or beyond the center. Further, the width and depth of the groove 31 can be appropriately changed. Furthermore, the easily deformable portion only needs to extend in the toe-heel direction and does not have to be strict.
<7-3>
The aspect and shape of the thin portion 16 of the face portion 1 are not particularly limited, and may be provided at the peripheral portion on the toe side. In the above embodiment, the face portion 1 is formed in a V shape so as to sandwich the toe side corner portion 18. However, the present invention is not limited to this, and only the first portion 161 along the crown portion 2 is the sole. It may be formed only by the second portion 162 along the portion 3 or may be other than that. Further, it is not necessary to completely follow the periphery of the face portion 1, and the thin portion 16 may be formed at a position slightly away from the periphery.
<7-4>
The head according to the above embodiment has a cup face structure, but other modes may be used. For example, with the face portion 1 and the sole portion 3, to a head body having an opening formed for the crown portion 2, it is possible to configure the head is fitted to the crown portion in the opening. Further, the cup face structure may not be used, and a flat face member can be fixed to the head body.
<7-5>
The shape of the sole portion 3 is not particularly limited, and it is sufficient that at least an easily deformable portion such as the groove portion as described above is provided. Therefore, the design of other recesses and the like can be changed as appropriate.
DESCRIPTION OF SYMBOLS 1 Face part 16 Thin part 2 Crown part 3 Sole part 31 Groove part (easy deformation part)
4 Hosel
Crown part,
The sole part,
The face portion has a thin-walled portion at the peripheral edge on the toe side,
The sole portion has a readily deformable portion extending in the toe-heel direction on the heel side, but not on the toe side .
The golf club head according to claim 1, wherein the easily deformable portion extends from a vicinity of an end portion on a heel side of the sole portion to a vicinity of a center in a toe-heel direction.
The golf club head according to claim 2, wherein the easily deformable portion is formed by a groove portion, and the depth of the groove becomes shallower from the heel side toward the toe side.
The sole portion has an easily deformable portion extending in the toe-heel direction at least on the heel side,
The easily deformable portion is formed by a groove portion, and the depth of the groove becomes shallower from the heel side toward the toe side .
The easily deformable portion, the face - in the back direction, the are from the face portion is formed at a position within 25 mm, the golf club head according to any one of claims 1 to 4.
The thin portion of the face portion includes a first portion along the crown portion, and a second portion along the sole portion side has a shape that is bent coupled to any one of claims 1 to 5 The described golf club head.
When the golf club head is viewed in the back direction from the face portion side, the thin portion of the face portion and the easily deformable portion of the sole portion are arranged so as to face each other with the center of the face portion interposed therebetween. The golf club head according to any one of claims 1 to 6 .
The crown portion includes a first peripheral region along the face portion, and a first main body region,
The sole portion includes a second peripheral region along the face portion and a second main body region,
A golf club head main body having an opening surrounded by the two main body regions is constituted by the first main body region of the crown portion and the second main body region of the sole portion,
A face member is constituted by the face portion, the first peripheral region, and the second peripheral region,
The golf club head is formed by joining the first and second peripheral regions of the face member to the opening peripheral edge of the golf club head main body,
The easily deformable portion, the second is formed in the body region, the golf club head according to any of claims 1 to 7.
JP2016255813A 2016-12-28 2016-12-28 Golf club head Active JP6303156B1 (en)
JP2016255813A JP6303156B1 (en) 2016-12-28 2016-12-28 Golf club head
US15/855,464 US20180178091A1 (en) 2016-12-28 2017-12-27 Golf club head
JP6303156B1 true JP6303156B1 (en) 2018-04-04
JP2018102857A JP2018102857A (en) 2018-07-05
ID=61828561
JP2016255813A Active JP6303156B1 (en) 2016-12-28 2016-12-28 Golf club head
US (1) US20180178091A1 (en)
JP (1) JP6303156B1 (en)
JP2010088630A (en) * 2008-10-07 2010-04-22 Bridgestone Sports Co Ltd Golf club head
JP2013500075A (en) * 2009-07-24 2013-01-07 ナイキ インターナショナル リミテッド Golf club head or other ball striking device having body features that affect impact
JP2014027973A (en) * 2012-07-31 2014-02-13 Dunlop Sports Co Ltd Golf club head
JP2014113267A (en) * 2012-12-07 2014-06-26 Bridgestone Sports Co Ltd Golf club head
JP2016120125A (en) * 2014-12-25 2016-07-07 ダンロップスポーツ株式会社 Golf club head
FR2535976B1 (en) * 1982-11-17 1985-10-25 Leveque De Vilmorin Laurent Club for educational play golf or accreditation
JP4563062B2 (en) * 2003-05-01 2010-10-13 アクシュネット カンパニーＡｃｕｓｈｎｅｔ Ｃｏｍｐａｎｙ Metal wood club with improved striking face
JP4340561B2 (en) * 2004-03-02 2009-10-07 Ｓｒｉスポーツ株式会社 Golf club head and golf club having the same
2016-12-28 JP JP2016255813A patent/JP6303156B1/en active Active
2017-12-27 US US15/855,464 patent/US20180178091A1/en active Pending
US20180178091A1 (en) 2018-06-28
JP2018102857A (en) 2018-07-05
US8721470B2 (en) 2014-05-13 Golf club assembly and golf club with aerodynamic features
2018-01-19 TRDD Decision of grant or rejection written
2018-02-07 A711 Notification of change in applicant
Ref document number: 6303156