US20130005500A1 - Putter head - Google Patents
Putter head Download PDFInfo
- Publication number
- US20130005500A1 US20130005500A1 US13/537,533 US201213537533A US2013005500A1 US 20130005500 A1 US20130005500 A1 US 20130005500A1 US 201213537533 A US201213537533 A US 201213537533A US 2013005500 A1 US2013005500 A1 US 2013005500A1
- Authority
- US
- United States
- Prior art keywords
- face
- face insert
- slit
- putter head
- insert
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0408—Heads characterised by specific dimensions, e.g. thickness
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0416—Heads having an impact surface provided by a face insert
- A63B53/042—Heads having an impact surface provided by a face insert the face insert consisting of a material different from that of the head
- A63B53/0425—Heads having an impact surface provided by a face insert the face insert consisting of a material different from that of the head the face insert comprising two or more different materials
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0487—Heads for putters
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2209/00—Characteristics of used materials
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/52—Details or accessories of golf clubs, bats, rackets or the like with slits
Definitions
- the present invention relates to a putter head of a golf club, more particularly to a putter head containing a face insert mounted in a face surface of a head main body thereof.
- a golf putter is used mainly for hitting a ball mainly on a green to roll the ball toward a cup.
- JP3087804U describes mounting of the face insert (called “elastic member” in this specification) in the face surface of the putter to soften a feeling of putting a ball.
- JP3087804U intends to provide a putter head capable of enhancing a directional stability of putting.
- FIG. 4 is a sectional view of a putter head of JP3087804U.
- An elastic member 14 is provided on the front face of a head main body 13 of a head 10 and the elastic member 14 has four lines of slits 16 parallel to each other.
- the abstract of disclosure of JP3087804U describes as follows.
- a golf ball is hit by a portion provided with the elastic member 14 of the face surface 12 .
- the surface of the golf ball 18 pressed by the hitting area enters the elastic member 14 while denting the surface of the elastic member 14 elastically, so that a contact area between the golf ball 18 and the elastic member 14 increases despite a distribution of dimples 26 in a hitting range.
- the elastic member 14 is provided with four slits 16 parallel to each other in a longitudinal direction of the head 10 and consequently, when the elastic member 14 makes contact with the golf ball 18 , the putter head is deformed mainly perpendicularly to the longitudinal direction of the putter head 10 .
- deflection in restoration force which results from the deformation in the longitudinal direction of the putter head 10 , can be prevented thereby enhancing a directional stability of putting.
- the elastic member 14 is constituted of silicone rubber whose hardness (JIS K6301) is 70 to less than Hs JIS A.
- the thickness of the elastic member 14 is 1 to 2 mm, the depth of the slit 16 is 1 to 2 mm, and the pitch of the slit 16 is 2 to 4 mm.
- an elastic member proposed by JP3087804U is so constructed that the slit is formed in the shape of a groove, which is formed up to halfway in a thickness direction of the elastic member 16 .
- JP3087804U states nothing about how to form the slit 16 .
- silicone rubber is soft, it is extremely difficult to form the slit 16 with high dimensional precision even if it is attempted to form the slit by cutting.
- the present invention intends to provide a putter head having a face insert provided with slits having excellent dimensional accuracy.
- a putter head of the present invention comprises: a head main body; and a face insert which is mounted in a face surface of the head main body and formed of a viscoelastic body, the face insert having a plurality of slits extending in a direction of toe to heel on a front surface thereof, wherein the face insert is formed of the layered body in which first viscolastic bodies and second viscoelastic bodies having a lower hardness than the first viscoelastic bodies are placed on one another alternately in a direction intersecting the face surface, wherein the slits are formed by eluting the face surface side of the second viscolastic body.
- the slit is inclined upward in a depth direction from the front face to the rear face of the face insert.
- an edge between the front face of the face insert and an inside face of the slit is provided with a roundness. That is, the edge between the front face of the face insert and the inside face of the slit has a circular section in the vertical direction.
- the hardness of the first viscoelastic body is greater than the hardness of the second viscoelastic body.
- the hardness (Shore hardness) of the first viscoelastic body is D50 to 75 and the hardness of the second viscoelastic body is A20 to 50.
- the width of the slit is 0.3 to 0.7 mm and an interval between the slits adjacent to each other is 1.1 to 1.5 mm.
- the slits are formed by eluting the face surface side of the second viscolastic body from the layered body constituted of the first viscoelastic body and the second viscoelastic body, thereby ensuring an excellent dimensional accuracy of the slits.
- the slit is formed to be inclined upward from the front face of the face insert main body to the rear side, the front end side of the first viscoelastic body is deflected downward or backward when the face insert hits a ball.
- top spin is easy to apply to the ball, thereby improving the straight advance performance of the ball after it is hit.
- intersection portion between the front face of the face insert and the inside face of the slit is provided with roundness, abrasion of the intersection portion is controlled, thereby improving the durability of the face insert.
- FIG. 1A is an exploded perspective view of a putter head according to an embodiment of the present invention
- FIG. 1B is a front view of the putter head
- FIG. 1C is a sectional view taken along the line C-C of FIG. 1B .
- FIG. 2A is a longitudinal sectional view of a face insert
- FIG. 2B is an enlarged longitudinal view of a front surface of the face insert of FIG. 1A .
- FIG. 3 is a sectional view of a layered body for producing the face insert.
- FIG. 4 is a sectional view of a putter head according to a conventional example.
- FIGS. 1 to 3 show a putter head 1 of a first embodiment.
- This putter head 1 is provided with a concave portion 2 H in the front face (face surface) of a head main body 2 and a face insert 3 is disposed within this concave portion 2 H.
- the head main body 2 is made of metal such as aluminum alloy, titanium alloy, copper alloy, and stainless steel.
- the face insert 3 is formed of viscoelastic body and has several lines of slits 5 on its front face.
- the concave portion 2 H and the face insert 3 are of a substantially rectangular shape which is horizontally long.
- the depth of the concave portion 2 H is entirely even and the thickness of the face insert 3 is entirely even.
- the face insert may be provided partly with a deep portion or a thick portion, or conversely may be provided partly with a shallow portion or a thin portion.
- the lateral and vertical widths of the face insert 3 are slightly smaller than those of the concave portion 2 H and there is a slight gap 6 between top, bottom, right and left side faces 3 S of the face insert 3 and a peripheral face 2 S of the concave portion 2 H.
- the width of this gap 6 is 0.3 to 1.5 mm, particularly 0.4 to 1.0 mm.
- its vertical width is preferred to be 16 to 30 mm, particularly 18 to 25 mm
- its lateral width is preferred to be 50 to 150 mm, particularly 70 to 100 mm
- its thickness is preferred to be 2 to 10 mm, particularly 3 to 8 mm.
- they are not limited to these values.
- the respective slits are provided in multiple stages vertically such that they are spaced at a specific interval.
- the slits 5 are positioned on the front face (face surface) of the face insert 3 .
- the slits 5 are formed so as to be positioned higher toward their rear ends.
- an inclination angle ⁇ of the slit is preferred to be 20 to 70° and more preferred to be 30 to 60°.
- the interval between the slits 5 is preferred to be 1.1 to 1.5 mm, and more preferred to be 1.2 to 1.4 mm.
- the width (vertical width) t of the slit 5 is preferred to be 0.3 to 0.7 mm, and more preferred to be 0.4 to 0.6 mm.
- the face insert 3 is disposed within the concave portion 2 H such that its left side face in FIG. 2A serves as a front surface of the putter head and an opposite surface is bonded to a deep wall surface of the concave portion 2 H with adhesive.
- adhesive epoxy base adhesive, rubber base adhesive or double-sided adhesive tape is preferable; however, it is not limited to these materials.
- first viscoelastic bodies 7 and second viscoelastic bodies 8 are placed on one another alternately as shown in FIG. 3 to form a layered body 3 ′ and then, the second viscoelastic body 8 is eluted through the front face of the layered body 3 ′.
- the hardness (Shore hardness based on JIS K 6253, ASTM D 2240) of the first viscoelastic body 7 is preferred to be D50 to 75, and is more preferred to be D55 to 70, and the hardness of the second viscoelastic body 8 is preferred to be A20 to 50.
- the second viscolastic body 8 is softer than the first viscoelastic body 7 .
- the thickness of the second viscolastic body 8 agrees with the vertical width t of the slit 5 .
- thermoplastic elastomer or soft synthetic resin is used as the viscoelastic material for constructing the face insert 3 . These materials may be of foamed material.
- first viscolastic body 7 specifically, polycarbonate resin, ABS resin, polyester resin, polyolefin resin, polyvinyl chloride resin, polyamide resin and the like are available.
- second viscoelastic body 8 olefin or styrene elastomer, ester elastomer, amide elastomer, silicon resin and the like are available. However, they are not limited to these materials.
- bonding method is not limited to this one.
- the rear face and the side faces of the layered body 3 ′ are sealed with a film or the like and the layered body 3 ′ is immersed in strong alkaline aqueous solution.
- the elution rate of the second viscoelastic body 8 is increased.
- an intersection portion between the front face of the face insert 3 and the slit 5 comes to have a roundness. That is, in FIG. 2B which is an enlarged longitudinal sectional view taken along a back and forth direction of the face insert 3 , an intersection portion 7 a becomes convexly curved in its section.
- intersection portion having such a roundness prevents abrasion of the intersection portion compared to an intersection having a sharp edge thereby improving the durability of the face insert 3 .
- the slit 5 having an excellent dimensional accuracy is produced.
- a head 1 equipped with the slits 5 having an excellent dimensional accuracy can hit a ball easily in a target direction.
- the slit 5 is inclined upward toward its rear end.
- the slit 5 is inclined upward toward the rear end
- the slit 5 may be formed horizontal toward the rear end or may be inclined downward toward the rear end.
- the top spin of the ball when it is hit is decreased, so that back spin of the ball becomes easy to apply.
- a player can adjust his or her feeling toward a distance more easily because the ball comes to roll badly. That is, generally, after a hit with a putter, the ball moves without any rotation or by sliding at few rotations on the green just after it leaves the face surface of the putter.
- the putter head of the present invention enables a player to adjust his or her feeling toward a distance when he or she plays on a little rough green or a green allowing excellent rolling, so that the ball rolls just over an intended distance.
- the gap 6 is formed around the face insert 4 .
- the gap may be filled with viscoelastic material such as rubber, elastomer, synthetic resin.
- the face insert 4 may be formed so as to fit to the concave portion 2 H without the gap 6 .
Abstract
A putter head includes a head main body and a face insert which is mounted in a face surface of the head main body and formed of viscoelastic body, the face insert having a plurality of slits extending in a direction of toe to heel on a front surface thereof. The face insert is formed of a layered body in which first viscolastic bodies and second viscoelastic bodies having a lower hardness than the first viscoelastic bodies are placed on one another alternately in a direction intersecting the face surface. The slits are formed by eluting the face surface side of the second viscolastic body. The slits are inclined upward in a depth direction from the front face of the face insert to the rear side.
Description
- The present invention relates to a putter head of a golf club, more particularly to a putter head containing a face insert mounted in a face surface of a head main body thereof.
- A golf putter is used mainly for hitting a ball mainly on a green to roll the ball toward a cup. JP3087804U describes mounting of the face insert (called “elastic member” in this specification) in the face surface of the putter to soften a feeling of putting a ball.
- JP3087804U intends to provide a putter head capable of enhancing a directional stability of putting.
-
FIG. 4 is a sectional view of a putter head of JP3087804U. Anelastic member 14 is provided on the front face of a headmain body 13 of ahead 10 and theelastic member 14 has four lines ofslits 16 parallel to each other. The abstract of disclosure of JP3087804U describes as follows. - A golf ball is hit by a portion provided with the
elastic member 14 of theface surface 12. As a result, the surface of thegolf ball 18 pressed by the hitting area enters theelastic member 14 while denting the surface of theelastic member 14 elastically, so that a contact area between thegolf ball 18 and theelastic member 14 increases despite a distribution ofdimples 26 in a hitting range. Furthermore, theelastic member 14 is provided with fourslits 16 parallel to each other in a longitudinal direction of thehead 10 and consequently, when theelastic member 14 makes contact with thegolf ball 18, the putter head is deformed mainly perpendicularly to the longitudinal direction of theputter head 10. As a result, deflection in restoration force, which results from the deformation in the longitudinal direction of theputter head 10, can be prevented thereby enhancing a directional stability of putting. - As described in paragraph 0013 to 0017 of JP3087804U, the
elastic member 14 is constituted of silicone rubber whose hardness (JIS K6301) is 70 to less than Hs JIS A. The thickness of theelastic member 14 is 1 to 2 mm, the depth of theslit 16 is 1 to 2 mm, and the pitch of theslit 16 is 2 to 4 mm. - Although, in
FIG. 4 , theslit 16 runs through theelastic member 16 from the front surface to the rear surface, an elastic member proposed by JP3087804U is so constructed that the slit is formed in the shape of a groove, which is formed up to halfway in a thickness direction of theelastic member 16. - JP3087804U states nothing about how to form the
slit 16. - Generally, because silicone rubber is soft, it is extremely difficult to form the
slit 16 with high dimensional precision even if it is attempted to form the slit by cutting. - Even if it is attempted to form the
elastic member 14 with theslit 16 by injection molding, a frictional force between a core for use in forming the slit and a slit inner surface of a molded product is so high that it is extremely difficult to remove the core from the molded product. - The present invention intends to provide a putter head having a face insert provided with slits having excellent dimensional accuracy.
- A putter head of the present invention comprises: a head main body; and a face insert which is mounted in a face surface of the head main body and formed of a viscoelastic body, the face insert having a plurality of slits extending in a direction of toe to heel on a front surface thereof, wherein the face insert is formed of the layered body in which first viscolastic bodies and second viscoelastic bodies having a lower hardness than the first viscoelastic bodies are placed on one another alternately in a direction intersecting the face surface, wherein the slits are formed by eluting the face surface side of the second viscolastic body.
- Preferably, the slit is inclined upward in a depth direction from the front face to the rear face of the face insert.
- According to an aspect of the present invention, an edge between the front face of the face insert and an inside face of the slit is provided with a roundness. That is, the edge between the front face of the face insert and the inside face of the slit has a circular section in the vertical direction.
- According to another aspect of the present invention, the hardness of the first viscoelastic body is greater than the hardness of the second viscoelastic body.
- Preferably, the hardness (Shore hardness) of the first viscoelastic body is D50 to 75 and the hardness of the second viscoelastic body is A20 to 50.
- Preferably, the width of the slit is 0.3 to 0.7 mm and an interval between the slits adjacent to each other is 1.1 to 1.5 mm.
- In the face insert of the putter head of the present invention, the slits are formed by eluting the face surface side of the second viscolastic body from the layered body constituted of the first viscoelastic body and the second viscoelastic body, thereby ensuring an excellent dimensional accuracy of the slits.
- In a case in which the slit is formed to be inclined upward from the front face of the face insert main body to the rear side, the front end side of the first viscoelastic body is deflected downward or backward when the face insert hits a ball. As a result, top spin is easy to apply to the ball, thereby improving the straight advance performance of the ball after it is hit.
- Because the intersection portion between the front face of the face insert and the inside face of the slit is provided with roundness, abrasion of the intersection portion is controlled, thereby improving the durability of the face insert.
-
FIG. 1A is an exploded perspective view of a putter head according to an embodiment of the present invention,FIG. 1B is a front view of the putter head, andFIG. 1C is a sectional view taken along the line C-C ofFIG. 1B . -
FIG. 2A is a longitudinal sectional view of a face insert, andFIG. 2B is an enlarged longitudinal view of a front surface of the face insert ofFIG. 1A . -
FIG. 3 is a sectional view of a layered body for producing the face insert. -
FIG. 4 is a sectional view of a putter head according to a conventional example. - The embodiments of the present invention will be described with reference to the accompanying drawings.
-
FIGS. 1 to 3 show aputter head 1 of a first embodiment. Thisputter head 1 is provided with aconcave portion 2H in the front face (face surface) of a headmain body 2 and aface insert 3 is disposed within thisconcave portion 2H. According to this embodiment, the headmain body 2 is made of metal such as aluminum alloy, titanium alloy, copper alloy, and stainless steel. Theface insert 3 is formed of viscoelastic body and has several lines ofslits 5 on its front face. - The
concave portion 2H and theface insert 3 are of a substantially rectangular shape which is horizontally long. The depth of theconcave portion 2H is entirely even and the thickness of theface insert 3 is entirely even. However, the face insert may be provided partly with a deep portion or a thick portion, or conversely may be provided partly with a shallow portion or a thin portion. - The lateral and vertical widths of the
face insert 3 are slightly smaller than those of theconcave portion 2H and there is aslight gap 6 between top, bottom, right and left side faces 3S of theface insert 3 and aperipheral face 2S of theconcave portion 2H. Preferably, the width of thisgap 6 is 0.3 to 1.5 mm, particularly 0.4 to 1.0 mm. - As regards the size of the
face insert 3, its vertical width is preferred to be 16 to 30 mm, particularly 18 to 25 mm, its lateral width is preferred to be 50 to 150 mm, particularly 70 to 100 mm, and its thickness is preferred to be 2 to 10 mm, particularly 3 to 8 mm. However, they are not limited to these values. - In this embodiment, the respective slits are provided in multiple stages vertically such that they are spaced at a specific interval. The
slits 5 are positioned on the front face (face surface) of theface insert 3. Theslits 5 are formed so as to be positioned higher toward their rear ends. When the front face of theface insert 3 is positioned perpendicularly to the ground, an inclination angle θ of the slit is preferred to be 20 to 70° and more preferred to be 30 to 60°. - The interval between the
slits 5 is preferred to be 1.1 to 1.5 mm, and more preferred to be 1.2 to 1.4 mm. The width (vertical width) t of theslit 5 is preferred to be 0.3 to 0.7 mm, and more preferred to be 0.4 to 0.6 mm. - The
face insert 3 is disposed within theconcave portion 2H such that its left side face inFIG. 2A serves as a front surface of the putter head and an opposite surface is bonded to a deep wall surface of theconcave portion 2H with adhesive. As the adhesive, epoxy base adhesive, rubber base adhesive or double-sided adhesive tape is preferable; however, it is not limited to these materials. - To manufacture the
face insert 3, firstviscoelastic bodies 7 and secondviscoelastic bodies 8 are placed on one another alternately as shown inFIG. 3 to form alayered body 3′ and then, the secondviscoelastic body 8 is eluted through the front face of thelayered body 3′. - The hardness (Shore hardness based on JIS K 6253, ASTM D 2240) of the first
viscoelastic body 7 is preferred to be D50 to 75, and is more preferred to be D55 to 70, and the hardness of the secondviscoelastic body 8 is preferred to be A20 to 50. The secondviscolastic body 8 is softer than the firstviscoelastic body 7. - The thickness of the second
viscolastic body 8 agrees with the vertical width t of theslit 5. - As the viscoelastic material for constructing the
face insert 3, thermoplastic elastomer or soft synthetic resin is used. These materials may be of foamed material. - As a material for the first
viscolastic body 7, specifically, polycarbonate resin, ABS resin, polyester resin, polyolefin resin, polyvinyl chloride resin, polyamide resin and the like are available. As a material for the secondviscoelastic body 8, olefin or styrene elastomer, ester elastomer, amide elastomer, silicon resin and the like are available. However, they are not limited to these materials. Although it is preferred to bond the firstviscelastic body 7 with the secondviscoelastic body 8 by pressing with heat, the bonding method is not limited to this one. - To elute the second
viscoelatic body 8, preferably, the rear face and the side faces of thelayered body 3′ are sealed with a film or the like and thelayered body 3′ is immersed in strong alkaline aqueous solution. By heating the strong alkaline aqueous solution, the elution rate of the secondviscoelastic body 8 is increased. - Due to the elution treatment, an intersection portion between the front face of the
face insert 3 and theslit 5 comes to have a roundness. That is, inFIG. 2B which is an enlarged longitudinal sectional view taken along a back and forth direction of theface insert 3, anintersection portion 7 a becomes convexly curved in its section. - The intersection portion having such a roundness prevents abrasion of the intersection portion compared to an intersection having a sharp edge thereby improving the durability of the
face insert 3. - Due to the aforementioned elution treatment, a face opposing the bottom of the
slit 5 of the secondviscoelastic body 8 becomes concavely curved. - By implementing the elution treatment upon the
layered body 3′, theslit 5 having an excellent dimensional accuracy is produced. Ahead 1 equipped with theslits 5 having an excellent dimensional accuracy can hit a ball easily in a target direction. - In this embodiment, the
slit 5 is inclined upward toward its rear end. As a result, when thehead 1 hits a ball, the front face of theface insert 3 is deformed downward and obliquely backward so as to facilitate application of top spin and improve a straight advance performance of the hit ball. - Although, in the above embodiment, the
slit 5 is inclined upward toward the rear end, theslit 5 may be formed horizontal toward the rear end or may be inclined downward toward the rear end. When theslit 5 is inclined downward toward the rear end, the top spin of the ball when it is hit is decreased, so that back spin of the ball becomes easy to apply. Thus, on a little rough green or a slippery green, a player can adjust his or her feeling toward a distance more easily because the ball comes to roll badly. That is, generally, after a hit with a putter, the ball moves without any rotation or by sliding at few rotations on the green just after it leaves the face surface of the putter. After a while, due to a friction between the ball and the green surface, the ball rolls without being slipped on the green (a peripheral velocity of the ball becomes equal to a moving velocity of the ball). If a force in the direction of top spin applied to the ball is decreased or a force in the direction of back spin when a hit with the putter head is applied to the ball, a sliding moving distance without any rotation or at few rotations just after the ball is hit increases. On a rough green, an influence on the ball of the green surface during a sliding move without any rotation or at few rotations just after the ball is hit decreases, so that a total sliding distance until the ball is stopped is equal to or about equal to a case of a ordinary green. Further, on a green allowing excellent rolling (more specifically, short-cut green or hard-tightened green with a roller or the like), the roll of the ball just after a hit is suppressed due to weakened top spin or generated back spin. Consequently, the total rolling distance until the ball is stopped becomes equal to or about equal to a case of an ordinary green. As a result, the putter head of the present invention enables a player to adjust his or her feeling toward a distance when he or she plays on a little rough green or a green allowing excellent rolling, so that the ball rolls just over an intended distance. - In
FIG. 1 , thegap 6 is formed around the face insert 4. The gap may be filled with viscoelastic material such as rubber, elastomer, synthetic resin. Alternatively, the face insert 4 may be formed so as to fit to theconcave portion 2H without thegap 6.
Claims (5)
1. A putter head comprising:
a head main body; and
a face insert which is mounted in a face surface of the head main body and formed of a viscoelastic body, the face insert having a plurality of slits extending in the direction of toe to heel on a front surface thereof,
wherein the face insert is formed of the layered body in which first viscolastic bodies and second viscoelastic bodies having a lower hardness than the first viscoelastic bodies are placed on one another alternately in a direction intersecting the face surface,
wherein the slits are formed by eluting the face surface side of the second viscolastic body.
2. The putter head according to claim 1 , wherein the slit is inclined upward in a depth direction from the front face to the rear face of the face insert.
3. The putter head according to claim 1 , wherein the edge between the front face of the face insert and an inside face of the slit is provided with a roundness.
4. The putter head according to claim 1 , wherein the hardness (Shore hardness) of the first viscolastic body is D50 to 75 and the hardness of the second viscolastic body is A20 to 50.
5. The putter head according to claim 1 , wherein the width of the slit is 0.3 to 0.7 mm and an interval between the slits adjacent to each other is 1.1 to 1.5 mm.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-145688 | 2011-06-30 | ||
JP2011145688A JP5682479B2 (en) | 2011-06-30 | 2011-06-30 | Putter head |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130005500A1 true US20130005500A1 (en) | 2013-01-03 |
Family
ID=47391201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/537,533 Abandoned US20130005500A1 (en) | 2011-06-30 | 2012-06-29 | Putter head |
Country Status (3)
Country | Link |
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US (1) | US20130005500A1 (en) |
JP (1) | JP5682479B2 (en) |
CN (1) | CN102847285A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130005503A1 (en) * | 2011-06-28 | 2013-01-03 | Kii Kenji | Putter type golf club head and putter type golf club |
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US5766093A (en) * | 1996-02-29 | 1998-06-16 | Rohrer; John W. | Golf putterhead |
US20050009623A1 (en) * | 2003-07-11 | 2005-01-13 | Dickinson Frank C. | Spin controlling golf club impact faceplate |
US20090105008A1 (en) * | 2008-11-05 | 2009-04-23 | Roger Cleveland Golf Co., Inc. | Putter-type golf club head |
US7717801B2 (en) * | 2008-05-19 | 2010-05-18 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking face |
US7806779B2 (en) * | 2008-05-19 | 2010-10-05 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking face |
US8216081B2 (en) * | 2008-05-19 | 2012-07-10 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking face |
US8506415B2 (en) * | 2010-09-13 | 2013-08-13 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking surface |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3087804U (en) * | 2002-02-06 | 2002-08-23 | サンライズエンタープライズ有限会社 | Putter head |
US7278926B2 (en) * | 2005-02-03 | 2007-10-09 | Taylor Made Golf Co., Inc. | Golf club head |
-
2011
- 2011-06-30 JP JP2011145688A patent/JP5682479B2/en active Active
-
2012
- 2012-02-22 CN CN2012100427652A patent/CN102847285A/en active Pending
- 2012-06-29 US US13/537,533 patent/US20130005500A1/en not_active Abandoned
Patent Citations (8)
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US5542675A (en) * | 1995-01-18 | 1996-08-06 | Italgom U.S.A. | Adaptor for golf putter and golf putter fitted therewith |
US5766093A (en) * | 1996-02-29 | 1998-06-16 | Rohrer; John W. | Golf putterhead |
US20050009623A1 (en) * | 2003-07-11 | 2005-01-13 | Dickinson Frank C. | Spin controlling golf club impact faceplate |
US7717801B2 (en) * | 2008-05-19 | 2010-05-18 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking face |
US7806779B2 (en) * | 2008-05-19 | 2010-10-05 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking face |
US8216081B2 (en) * | 2008-05-19 | 2012-07-10 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking face |
US20090105008A1 (en) * | 2008-11-05 | 2009-04-23 | Roger Cleveland Golf Co., Inc. | Putter-type golf club head |
US8506415B2 (en) * | 2010-09-13 | 2013-08-13 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking surface |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130005503A1 (en) * | 2011-06-28 | 2013-01-03 | Kii Kenji | Putter type golf club head and putter type golf club |
US8900071B2 (en) * | 2011-06-28 | 2014-12-02 | Dunlop Sports Co. Ltd. | Putter type golf club head and putter type golf club |
Also Published As
Publication number | Publication date |
---|---|
JP5682479B2 (en) | 2015-03-11 |
JP2013009902A (en) | 2013-01-17 |
CN102847285A (en) | 2013-01-02 |
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AS | Assignment |
Owner name: BRIDGESTONE SPORTS CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NARITA, TADAHIRO;REEL/FRAME:028479/0209 Effective date: 20120606 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |