AU2017276183B2 - Golf club head having optimized ballspeed to CT relationship - Google Patents
Golf club head having optimized ballspeed to CT relationship Download PDFInfo
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- AU2017276183B2 AU2017276183B2 AU2017276183A AU2017276183A AU2017276183B2 AU 2017276183 B2 AU2017276183 B2 AU 2017276183B2 AU 2017276183 A AU2017276183 A AU 2017276183A AU 2017276183 A AU2017276183 A AU 2017276183A AU 2017276183 B2 AU2017276183 B2 AU 2017276183B2
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- 239000007787 solid Substances 0.000 claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 18
- 239000002131 composite material Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 5
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims description 4
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 9
- 238000005266 casting Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- -1 6-4 titanium alloy Chemical compound 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001040 Beta-titanium Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910021535 alpha-beta titanium Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- A63B53/0466—Heads wood-type
-
- 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
-
- 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
- A63B53/0408—Heads characterised by specific dimensions, e.g. thickness
- A63B53/0412—Volume
-
- 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
- A63B53/0433—Heads with special sole configurations
-
- 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
- A63B53/0437—Heads with special crown configurations
-
- 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
- A63B53/045—Strengthening ribs
-
- 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
-
- 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
- A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Golf Clubs (AREA)
Abstract
GOLF CLUB HEAD HAVING OPTIMIZED BALLSPEED TO CT RELATIONSHIP A golf club head (10) comprising: a metal body (20) comprising a striking face section (30), a sole section (22) extending from a lower edge (33) of the striking face section (30), an upper opening (26), and a return section (32) extending from an upper edge (31) of the striking face section (30), the return section (32) disposed between the striking face section (30) and the upper opening (26); a crown insert (42) permanently affixed to the body (20) to close the upper opening (26) and define a hollow body interior (27); and first and second stiffening members (50, 52) disposed within the hollow body interior (27) and extending from the return section (32) to the sole section (22), wherein each of the first and second stiffening members (50, 52) is a solid metal rod having a diameter of 0.050 inches (1.3 mm) to 0.200 inches (5.08 mm), wherein the striking face section (30) comprises a face center and a rear face surface (36) facing the hollow body interior (27), wherein no portion of either the first or second stiffening member (50, 52) makes contact with the rear face surface (36) or the other stiffening member (50, 52), wherein the first stiffening member (50) extends approximately parallel with the second stiffening member (52), wherein each of the first and second stiffening members (50, 52) is located a first distance of less than 0.433 inches (11.0 mm) from the rear face surface (36), the first distance measured along a plane extending through the face center along a vertical z-axis and a horizontal x-axis extending perpendicular to the striking face section (30) and perpendicular to the vertical z-axis, and wherein the first stiffening member (50) is spaced a second distance of 0.500 to 2.00 inches (12.7 to 50.8 mm) from the second stiffening member (52), the second distance measured along a horizontal y-axis extending parallel to the striking face section (30) and perpendicular to the vertical z-axis and horizontal x-axis.
Description
[0002] The present invention relates to a golf club head. More specifically, the present invention relates to a golf club head with stress-reducing features connecting a crown portion with a sole portion via a hollow interior and disposed proximate a striking face section.
Description of the Related Art [0003] The prior art discloses various golf club heads having interior structures. For example, Kosmatka, U.S. Patent Number 6299547 for a Golf Club Head With an Internal Striking Plate Brace, discloses a golf club head with a brace to limit the deflection of the striking plate, Yabu, U.S. Patent Number 6852038 for a Golf Club Head And Method of Making The Same, discloses a golf club head with a sound bar, Galloway, U.S. Patent Number 7118493 for a Multiple Material Golf Club Head, discloses a golf club head with a composite aft body having an interior sound component extending upward from a sole section of a metal face component, Seluga et al., U.S. Patent Number 8834294 for a Golf Club Head With Center Of Gravity Adjustability, discloses a golf club head with a tube having a mass for adjusting the CG of a golf club head, and Dawson et al., U.S. Patent Number 8900070 for a Weighted Golf Club Head discloses a golf club head with an interior weight lip extending from the sole towards the face. However, the prior art fails to disclose an interior structure that increases ball speed through reducing stress in the striking face section at impact, with a minimal increase in mass to the golf club head.
OBJECT OF THE INVENTION [0004] It is an object of the present invention to overcome or at least ameliorate the above problem.
BRIEF SUMMARY OF THE INVENTION [0005] The present disclosure relates to a golf club head comprising interior structures connecting a crown section to a sole section to reduce the stress in a striking face section during impact with a golfball. In some embodiments, the interior structures are hollow tubes or solid rods composed of a titanium alloy.
AH25(13992557_1):JBL
2017276183 22 Jan 2019 [0006] In a first aspect, the present invention provides a golf club head comprising:
a metal body comprising a striking face section, a sole section extending from a lower edge of the striking face section, an upper opening, and a return section extending from an upper edge of the striking face section, the return section disposed between the striking face section and the upper opening;
a crown insert permanently affixed to the body to close the upper opening and define a hollow body interior; and first and second stiffening members disposed within the hollow body interior and extending from the return section to the sole section, wherein each of the first and second stiffening members is a solid metal rod having a diameter of 0.050 inches (1.3 mm) to 0.200 inches (5.08 mm), wherein the striking face section comprises a face center and a rear face surface facing the hollow body interior, wherein no portion of either the first or second stiffening member makes contact with the rear face surface or the other stiffening member, wherein the first stiffening member extends approximately parallel with the second stiffening member when the striking face section impacts a golfball, wherein each of the first and second stiffening members is located a first distance of less than 0.500 inches (12.7 mm) from the rear face surface, the first distance measured along a plane extending through the face center along a vertical z-axis and a horizontal x-axis extending perpendicular to the striking face section and perpendicular to the vertical z-axis, and wherein the first stiffening member is spaced a second distance of 0.500 to 2.00 inches (12.7 to 50.8 mm) from the second stiffening member, the second distance measured along a horizontal y-axis extending parallel to the striking face section and perpendicular to the vertical z-axis and horizontal x-axis;
wherein at least one of the first and second stiffening members comprises an upper end proximate the return section and a lower end proximate the sole section, wherein the upper end is spaced a third distance from the rear face surface, wherein the lower end is spaced a fourth distance from the rear face surface, and wherein the third distance is less than the fourth distance;
wherein the third distance is 0.120 inches (3.05 mm) to 0.150 inches (3.81 mm), and wherein the fourth distance is 0.180 inches (4.57 mm) to 0.210 inches (5.33 mm).
AH26(21989796_1):MSD
2017276183 22 Jan 2019 [0007] In a second aspect, the present invention provides a golf club head comprising:
a body comprising a striking face section, a sole section extending from a lower edge of the striking face section, an upper opening, and a return section extending from an upper edge of the striking face section and disposed between the striking face section and the upper opening;
a crown insert permanently affixed to the body to close the upper opening and define a hollow body interior;
a sole insert; and first and second solid rods disposed within the hollow body interior and extending from the return section to the sole section, wherein the sole section comprises at least one cutout in communication with the hollow body interior, wherein the sole insert is permanently affixed to the body to close the at least one cutout, wherein no portion of either the first or second solid rods makes contact with the striking face section or each other when the striking face section impacts a golfball, wherein the striking face section comprises a face center and a rear face surface, wherein each of the first and second solid rods is located a first distance of less than 0.500 inches (12.7 mm) from the rear face surface along a vertical plane extending through the face center, the vertical plane extending along a vertical z-axis and a horizontal x-axis extending perpendicular to the striking face section, wherein the body is composed of a first material having a first density, and wherein the crown insert is composed of a second material having a second density that is lower than the first density;
wherein the first solid rod is spaced a second distance of 0.500 to 2.00 inches (12.7 to 50.8 mm) from the second solid rod, the second distance measured along a horizontal y-axis extending parallel to the striking face section and perpendicular to the vertical z-axis and horizontal x-axis;
wherein at least one of the first and second solid rods comprises an upper end proximate the return section and a lower end proximate the sole section, wherein the upper end is spaced a third distance from the rear face surface, wherein the lower end is spaced a fourth distance from the rear face surface, and wherein the third distance is less than the fourth distance;
wherein the third distance is 0.120 inches (3.05 mm) to 0.150 inches (3.81 mm); and wherein the fourth distance is 0.180 inches (4.57 mm) to 0.210 inches (5.33 mm).
AH26(21989796_1):MSD
2017276183 22 Jan 2019 [0008] In a third aspect, the present invention provides a golf club head comprising:
a body comprising a striking face section, a sole section extending from a lower edge of the striking face section, an upper opening, and a return section extending away from a lower edge of the striking face section and disposed between the striking face section and the upper opening;
a carbon composite crown section affixed to the body to close the upper opening and define a hollow body interior; and first and second solid rods disposed within the hollow body interior and extending from the return section to the sole section, wherein the striking face section comprises a face center and a rear face surface, wherein each of the first and second solid rods is integrally cast with the body from a metal alloy material, wherein the sole section comprises first and second bosses extending into the hollow body interior, wherein the first boss corresponds to the first solid rod and the second boss corresponds to the second solid rod, wherein each of the first and second solid rods is located a first distance of less than 0.500 inches (12.7 mm) from the rear face surface along a vertical plane extending through the face center, the vertical plane extending along a vertical z-axis and a horizontal x-axis extending perpendicular to the striking face section, wherein no portion of either the first or second solid rods makes contact with the striking face section when the striking face section impacts a golfball, and wherein at least one of the first and second solid rods extends approximately parallel with the rear face surface;
wherein the first solid rod is spaced a second distance of 0.500 to 2.00 inches (12.7 to 50.8 mm) from the second solid rod, the second distance measured along a horizontal y-axis extending parallel to the striking face section and perpendicular to the vertical z-axis and horizontal x-axis;
wherein at least one of the first and second solid rods comprises an upper end proximate the return section and a lower end proximate the sole section, wherein the upper end is spaced a third distance from the rear face surface, wherein the lower end is spaced a fourth distance from the rear face surface, and wherein the third distance is less than the fourth distance;
wherein the third distance is 0.120 inches (3.05 mm) to 0.150 inches (3.81 mm); and wherein the fourth distance is 0.180 inches (4.57 mm) to 0.210 inches (5.33 mm).
AH26(21989796_1):MSD
5a
2017276183 22 Jan 2019 [0009] There is also disclosed herein a golf club head comprising:
a metal body comprising a striking face section, a sole section extending from a lower edge of the striking face section, a return section extending from an upper edge of the striking face section, and an upper opening, the return section disposed between the striking face section and the upper opening;
a crown insert permanently affixed to the body to close the upper opening and define a hollow body interior; and first and second stiffening members disposed within the hollow body interior and extending from the return section to the sole section;
wherein the striking face section comprises a face center and a rear face surface facing the hollow body interior;
wherein each of the first and second stiffening members is spaced no more than 0.250 inch (6.4 mm) from the rear face surface along a vertical plane extending through the face center perpendicular to the striking face section;
wherein each of the first and second stiffening members is a solid metal rod;
wherein each of the first and second stiffening members has a diameter of 0.050 inch (1 mm) to 0.200 inch (5 mm) and a length of 1.00 inch (30 mm) to 2.50 inches (64 mm);
wherein the first stiffening member extends approximately parallel with the second stiffening member;
wherein the first stiffening member is spaced a distance of 0.500 (10 mm) to 2.00 inch (50.8 mm) from the second stiffening member; and wherein no portion of either the first or second stiffening member makes contact with the striking face section during impact with a golfball.
[0010] There is also disclosed herein a golf club head comprising:
a titanium alloy body comprising a striking face section, a sole section extending from a lower edge of the striking face section, a return section extending from an upper edge of the
AH26(21989796_1):MSD
2017276183 12 Dec 2017 striking face section, an upper opening, and an aft end opposite the striking face section, the return section disposed between the striking face section and the upper opening;
a carbon composite crown insert permanently affixed to the body to close the upper opening and define a hollow body interior; and first and second stiffening members disposed within the hollow body interior and extending from the return section to the sole section, wherein the striking face section comprises a face center and a rear face surface; wherein each of the first and second stiffening members is located closer to the striking face section than to the aft end within the hollow body interior;
wherein each of the first and second stiffening members is spaced no more than 0.250 inches (6.4 mm) from the rear face surface along a vertical plane extending through the face center perpendicular to the striking face section;
wherein no portion of either the first of second stiffening member makes contact with the striking face section during impact with a golfball;
wherein the first stiffening member comprises an upper end proximate the return section and a lower end proximate the sole section;
wherein the upper end is spaced a first distance from the striking face section;
wherein the lower end is spaced a second distance from the striking face section that is greater than the first distance; and wherein the gold club head has a volume of 420 cubic centimeters to 470 cubic centimeters.
[0011] There is also disclosed herein a golf club head comprising a body comprising a striking face section, a sole section extending from a lower edge of the striking face section, and a crown section extending from an upper edge of the striking face section, the striking face section, sole section, and crown section defining a hollow body interior, and at least one stiffening member disposed within the hollow body interior and extending from the crown section to the sole section, wherein the striking face section comprises a rear face surface facing the hollow body interior, wherein the at least one stiffening member is located no more than 1 inch from the rear face surface along a vertical plane extending through the face center perpendicular to the striking face section, wherein no portion of the at least one stiffening member makes contact with the striking face section, wherein the golf club head satisfies the equation
Ι76αίίη0ΓΤ„ > 0.0356x + 140.82 and wherein
AH25(13992557_1):JBL
2017276183 12 Dec 2017
Vballnorm ~
+ ^-0.822 mh + mb
In a further embodiment, the golf club head may satisfy the equation VbcMnorm > 0.03 56x 4141.19.
[0012] In some embodiments, the at least one stiffening member may comprise first and second stiffening members, the first stiffening member may extend approximately parallel with the second stiffening member, and the first stiffening member may be spaced a distance of 0.75 to 1.50 inch from the second stiffening member. In a further embodiment, each of the first and second stiffening members may comprise a structure selected from the group consisting of a solid rod and a hollow tube. In another, further embodiment, each of the first and second stiffening members may be a solid rod composed of a metal material selected from the group consisting of titanium alloy and steel. In an alternative embodiment, the at least one stiffening member may be located no more than 0.25 inches from the rear face surface along the vertical plane extending through the face center perpendicular to the striking face section. In a further embodiment, the at least one stiffening member may include an upper end proximate the crown section and a lower end proximate the sole section, the upper end may be spaced a first distance from the rear face surface, the lower end may be spaced a second distance from the rear face surface, and the first distance may be less than the second distance. In any of these embodiments, the golf club head may further comprise a cover piece, the sole section may include a plurality of cutouts, and the cover piece may be secured to the sole section and at least partially cover each of the plurality of cutouts. Also in any of these embodiments, the golf club head may comprise a crown insert, the crown section may comprise an upper opening, and the crown insert may cover the upper opening.
[0013] There is also disclosed herein a golf club head comprising a metal body comprising a striking face section, a sole section extending from a lower edge of the striking face section, and a return section extending from an upper edge of the striking face section, the return section and sole section defining an upper opening, and the striking face section, sole section, and return section defining a hollow body interior, and first and second stiffening members disposed within the hollow body interior and extending from the return section to the sole section, wherein each of the first and second stiffening members is a solid metal rod, wherein no portion of either the first or second stiffening member makes contact with the striking face section, wherein the golf
AH25(13992557_1):JBL
2017276183 12 Dec 2017 club head satisfies the equation Vbaunorm > 0.0356x + 140.82, and wherein
mh+mb golf club head may comprise a crown insert that may be permanently affixed to the body to close the upper opening. In some embodiments, the crown insert may be composed of a carbon composite material, and each of the first and second stiffening members may be integrally cast with the body.
[0014] In another embodiment, the golf club head may comprise a carbon composite cover piece, the sole section may comprise at least one cutout, and the cover piece may be permanently affixed to the sole section to cover the at least one cutout. In yet another embodiment, each of the first and second stiffening members may have a length of 1.00 inch to 2.50 inches, the first stiffening member may extend approximately parallel with the second stiffening member, and the first stiffening member may be spaced a distance of 0.500 to 2.00 inches from the second stiffening member. In still another embodiment, the striking face section may comprise a face center and a rear face surface, and each of the first and second stiffening members may be located no more than 0.500 inch from the rear face surface along a vertical plane extending through the face center perpendicular to the striking face section.
[0015] There is also disclosed herein a golf club head comprising a metal body comprising a striking face section, a sole section extending from a lower edge of the striking face section, a return section extending from an upper edge of the striking face section, and an aft end opposite the striking face section, the return section and sole section defining an upper opening, and the striking face section, sole section, and return section defining a hollow body interior, first and second stiffening members disposed within the hollow body interior and extending from the return section to the sole section, and a carbon composite crown insert permanently affixed to the body to close the upper opening, wherein each of the first and second stiffening members is located closer to the striking face section than to the aft end within the hollow body interior, wherein the golf club head has a volume of 420 cubic centimeters to 470 cubic centimeters, wherein the golf club head satisfies the equation VbaUnorm > 0.0356x + 141.19, and wherein
Vballnorm ~
πι^+τη^
AH25(13992557_1):JBL
2017276183 12 Dec 2017 [0016] In some embodiments, the first stiffening member may comprise an upper end proximate the return section and a lower end proximate the sole section, the upper end may be spaced a first distance from the striking face section, and the lower end may be spaced a second distance from the striking face section that is greater than the first distance. In a further embodiment, the first distance may be 0.120 inches to 0.150 inches, and the second distance may be 0.180 inch to 0.210 inches. In another embodiment, each of the first and second stiffening members may have a length of 1.00 inch to 2.50 inches, the first stiffening member may extend approximately parallel with the second stiffening member, and the first stiffening member may be spaced a distance of 0.75 inches to 1.50 inches from the second stiffening member.
[0017] Having briefly described embodiments of the present invention, the above and further features thereof will be recognized by those skilled in the pertinent art from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS [0018] Preferred embodiments of the invention will be described hereinafter, by way of examples only, with reference to the accompanying drawings, wherein:
[0019] FIG. 1 is a top elevational view of the preferred embodiment of the golf club head of the present invention.
[0020] FIG. 2 is a sole elevational view of the golf club head shown in FIG. 1.
[0021] FIG. 3 is a cross-sectional view of the golf club head shown in FIG. 1 along lines 3-3.
[0022] FIG. 4 is a cross-sectional view of the golf club head shown in FIG. 3 along lines 4-4.
[0023] FIGS. 5-6 are cross-sectional views of the golf club head shown in FIG. 3 along lines 5-5 and 6-6, respectively.
[0024] FIG. 7 is a top perspective view of the golf club head shown in FIG. 1 with its crown insert and sole cover piece removed.
AH25(13992557_1):JBL ίο
2017276183 12 Dec 2017 [0025] FIG. 8 is a sole perspective view of the embodiment shown in FIG. 7.
[0026] FIG. 9 is a flow chart describing how to calculate the normalized ball speed of a golf club head, including the embodiment shown in FIG. 1.
[0027] FIG. 10 is a top plan view of an exemplary calibration plate used to calculate normalized ball speed of a golf club head.
[0028] FIG. 11 is a cross-sectional view of the calibration plate shown in FIG. 10 along lines 11-11.
[0029] FIG. 12 is a graph showing the relationship between normalized ball speed (y-axis) and Characteristic Time (ps) (x-axis) of prior art golf club heads and the inventive golf club head described herein.
DETAILED DESCRIPTION OF THE INVENTION [0030] As shown in FIGS. 1-8, a preferred embodiment of the golf club head 10 of the present invention is generally designated. The golf club head 10 includes a body 20 having a striking face section 30 with a face center 34, a return section 32 extending rearwards away from an upper edge 31 of the striking face section 30, sole section 22 extending rearwards away from a lower edge 33 of the striking face section 30, a hosel 24 for engaging a shaft, a heel end 23, a toe end 25, an upper opening 26, a hollow interior 27, and an aft end 28. A crown section 40 is comprised of the return section 32 and a crown insert 42 that is placed over the upper opening 26 to enclose the hollow interior 27. The body 20 also includes three cutouts 70, 72, 74 in a center area 21 of the sole section 22, which are closed by a cover piece 80 having a density that is lower than the density of the material used to make the body 20. Each of the crown section 40 and cover piece 80 preferably is composed of a carbon composite material, while the body 20 is composed of a metal material such as titanium alloy or steel.
[0031] Within the hollow interior 27, two stiffening members 50, 52 extend from the sole section 22 upward to the return section 32 approximately parallel with the rear surface 36 of the striking face section 30 and with each other. In an alternative embodiment, the stiffening members 50, 52 may extend to the crown insert 42 instead; what is important is that the stiffening members 50, 52 connect the crown section 40 to the sole section 22 proximate the
AH25(13992557_1):JBL
2017276183 12 Dec 2017 striking face section 30, without making contact with any portion of the striking face section 30, even when the striking face section 30 impacts a golfball. The stiffening members 50, 52 must, in any event, be closer to the striking face section 30 than to the aft end 28 of the body 20.
[0032] As shown in Figure 3, the preferred embodiment has two stiffening members 50, 52, each of which is a solid rod composed of a lightweight, strong metal material such as titanium alloy or steel, though in an alternative embodiment the stiffening members 50, 52 each may be a hollow tube or other hollow structure made of a strong lightweight metal or a composite material. In another embodiment, the golf club head 10 may include both the solid rod and hollow types of stiffening members 50. The stiffening members 50, 52 preferably are co-cast with the body 20 using a wax molding process, though in alternative embodiments may be added after the body 20 is manufactured and secured to the body 20 via welding, brazing, solder, or adhesive, and/or mechanically.
[0033] In the preferred embodiment, each of the stiffening members 50, 52 has a diameter of 0.050 inch to 0.200 inch and a length of 1 to 2.5 inches. The stiffening members 50, 52 are both located within 1 inch of the rear surface 36 of the striking face section 30 measured along a vertical plane 60 extending through the face center 34 perpendicular to the striking face section 30. No portion of any stiffening member 50, 52 should be located outside of this 1-inch range; in fact, it is more preferable for each stiffening member 50, 52 to be located even closer to the rear surface 36 of the striking face section 30. In the preferred embodiment, the stiffening members are spaced 0.136 inch to 0.210 inch from the rear surface 36, with the upper end 50a, 52a of each stiffening member 50, 52 spaced a distance DI that is slightly closer to the rear surface 36 than the spacing D2 of the lower end 50b, 52b. In the preferred embodiment, DI ranges from 0.120 inch to 0.150 inch, while D2 ranges from 0.180 inch to 0.210 inch. The stiffening members 50, 52 are also spaced from one another by a distance D3 of 0.500 to 2.00 inch, more preferably approximately 0.75 to 1.50 inch, and most preferably approximately 1.00 inch. This positioning of the stiffening members 50, 52 optimizes the normalized ball speed relationship to Characteristic Time (CT), as measured in ps by the U.S. Golf Association (USGA) CT test.
[0034] Normalized ball speed removes the variable effect of a golf club head’s mass and loft, and the construction of a particular golfball, from testing the speed of a golfball upon impact with any given golf club head, including the golf club head 10 of the present invention; in other
AH25(13992557_1):JBL
2017276183 12 Dec 2017 words, it allows an apples-to-apples comparison of golf club head performance. Normalized ball speed can be determined for a golf club head using the following steps, which are also outlined in the flow chart of Figure 9.
[0035] First, provide a titanium 6-4 calibration plate 90 with a mass of approximately 190 grams, a diameter D4 of approximately 4 inches, a minimum thickness T1 of approximately 0.100-0.150 inch, and a maximum thickness T2 of approximately 0.200-0.400 inch, as shown in Figures 10 and 11, and strike the center 92 of the calibration plate with a test golfball moving at approximately 109 mph (step 100). Measure the return velocity Vbr of the ball (step 110). Then, strike the same test golfball, again traveling at approximately 109 mph, with the center 34 of the striking face section 30 of the golf club head 10 being assessed (step 120), and measure the rebound velocity Vcr of the test golfball (step 130). Next, measure and record the mass of the plate mp, golfball mb, golf club head 10 mc, measured head test ball in velocity (109 mph target) Vcin, measured plate test ball in velocity (109 mph target) Vbin, measured head test ball return velocity Vcr, and measured plate test ball return velocity Vbr (step 140). Finally, calculate the normalized ball speed (ybaiinorm) using the following equation (step 150):
Vballnorm ~
mh + mb
In this equation, Vinfl is 100 and mh is 200.
[0036] The golf club head 10 of the present invention has a Vbaunorm > 0.0356x + 140.82, and more preferably a Vbaunorm > 0.03 56x + 141.19. The positioning of the stiffening members 50, 52 of the present invention allows the golf club head 10 to satisfy this equation; as shown in Figure 12, prior art golf club heads, which do not include the stiffening member structure, fall well short of this performance metric.
[0037] In addition to optimizing the normalized ball speed of the golf club head 10, locating the stiffening members 50, 52 within the region of the golf club head 10 defined above has the greatest stress-reducing effect on the golf club head 10. If any of the stiffening members 50, 52 are placed more than 1 inch away from the rear surface 36 of the striking face section 30, they will not have a noticeable effect on the stress placed on the striking face section 30 when the golf club head 10 is in use, and will use discretionary mass without providing a significant performance benefit.
AH25(13992557_1):JBL
2017276183 12 Dec 2017 [0038] When the golf club head 10 is designed as a driver, it preferably has a volume from 200 cubic centimeters to 600 cubic centimeters, more preferably from 300 cubic centimeters to 500 cubic centimeters, and most preferably from 420 cubic centimeters to 470 cubic centimeters, with a most preferred volume of 460 cubic centimeters. In the preferred embodiment, the golf club head 10 has a volume of approximately 450 cc to 460 cc.
[0039] The volume of the golf club head 10 will also vary between fairway woods (preferably ranging from 3-woods to eleven woods) with smaller volumes than drivers. When designed as a driver, the golf club head 10 preferably has a mass of no more than 215 grams, and most preferably a mass of 180 to 215 grams; when designed as a fairway wood, the golf club head 10 preferably has a mass of 135 grams to 200 grams, and preferably from 140 grams to 165 grams.
[0040] In each of the embodiments disclosed herein, the striking face section 30 preferably has a varying thickness such as that described in U.S Patent Number 7448960, for a Golf Club Head With Variable Face Thickness, which pertinent parts are hereby incorporated by reference. Other alternative embodiments of the thickness of the striking face section 30 are disclosed in U.S Patent Number 6398666, for a Golf Club Striking Plate With Variable Thickness, U.S. Patent Number 6471603, for a Contoured Golf Club Face and U.S. Patent Number 6368234, for a Golf Club Striking Plate Having Elliptical Regions Of Thickness, all of which are owned by Callaway Golf Company and which pertinent parts are hereby incorporated by reference. Alternatively, the striking face section 30 may have a uniform thickness.
[0041] In each of the embodiments disclosed herein, the body 20 is preferably cast from molten metal in a method such as the well-known lost-wax casting method. The metal for casting is preferably titanium or a titanium alloy such as 6-4 titanium alloy, alpha-beta titanium alloy or beta titanium alloy for forging, and 6-4 titanium for casting. Alternatively, the body 20 is composed of 17-4 steel alloy. Additional methods for manufacturing the body 20 include forming the body 20 from a flat sheet of metal, super-plastic forming the body from a flat sheet of metal, machining the body 20 from a solid block of metal, electrochemical milling the body 20 from a forged pre-form, casting the body using centrifugal casting, casting the body 20 using levitation casting, and like manufacturing methods.
[0042] In other embodiments, the golf club head 10 may have a multi-material composition such as any of those disclosed in U.S. Patent Nos. 6244976, 6332847, 6386990, 6406378,
AH25(13992557_1):JBL
2017276183 12 Dec 2017
6440008, 6471604, 6491592, 6527650, 6565452, 6575845, 6478692, 6582323, 6508978, 6592466,6602149, 6607452, 6612398, 6663504, 6669578, 6739982, 6758763, 6860824, 6994637,7025692,7070517, 7112148, 7118493, 7121957, 7125344, 7128661, 7163470, 7226366, 7252600, 7258631, 7314418, 7320646, 7387577, 7396296, 7402112, 7407448, 7413520,7431667,7438647,7455598, 7476161, 7491134, 7497787, 7549935, 7578751, 7717807, 7749096, and 7749097, the disclosure of each of which is hereby incorporated in its entirety herein.
[0043] From the foregoing it is believed that those skilled in the pertinent art will recognize the meritorious advancement of this invention and will readily understand that while the present invention has been described in association with a preferred embodiment thereof, and other embodiments illustrated in the accompanying drawings, numerous changes, modifications and substitutions of equivalents may be made therein without departing from the spirit and scope of this invention which is intended to be unlimited by the foregoing except as may appear in the following appended claims. Therefore, the embodiments of the invention in which an exclusive property or privilege is claimed are defined in the following appended claims.
Claims (15)
1. A golf club head comprising:
a metal body comprising a striking face section, a sole section extending from a lower edge of the striking face section, an upper opening, and a return section extending from an upper edge of the striking face section, the return section disposed between the striking face section and the upper opening;
a crown insert permanently affixed to the body to close the upper opening and define a hollow body interior; and first and second stiffening members disposed within the hollow body interior and extending from the return section to the sole section, wherein each of the first and second stiffening members is a solid metal rod having a diameter of 0.050 inches (1.3 mm) to 0.200 inches (5.08 mm), wherein the striking face section comprises a face center and a rear face surface facing the hollow body interior, wherein no portion of either the first or second stiffening member makes contact with the rear face surface or the other stiffening member when the striking face section impacts a golf ball, wherein the first stiffening member extends approximately parallel with the second stiffening member, wherein each of the first and second stiffening members is located a first distance of less than 0.500 inches (12.7 mm) from the rear face surface, the first distance measured along a plane extending through the face center along a vertical z-axis and a horizontal x-axis extending perpendicular to the striking face section and perpendicular to the vertical z-axis, and wherein the first stiffening member is spaced a second distance of 0.500 to 2.00 inches (12.7 to 50.8 mm) from the second stiffening member, the second distance measured along a horizontal y-axis extending parallel to the striking face section and perpendicular to the vertical z-axis and horizontal x-axis;
wherein at least one of the first and second stiffening members comprises an upper end proximate the return section and a lower end proximate the sole section, wherein the upper end is spaced a third distance from the rear face surface, wherein the lower end is spaced a fourth distance from the rear face surface, and wherein the third distance is less than the fourth distance;
AH26(21989796_1):MSD
2017276183 22 Jan 2019 wherein the third distance is 0.120 inches (3.05 mm) to 0.150 inches (3.81 mm), and wherein the fourth distance is 0.180 inches (4.57 mm) to 0.210 inches (5.33 mm).
2. The golf club head of claim 1, wherein the crown insert is composed of a carbon composite material.
3. The golf club head of claim 1, wherein each of the first and second stiffening members has a length of 1.00 inch (25.4 mm) to 2.50 inches (63.5 mm).
4. The golf club head of any one of the preceding claims, wherein the first distance is less than 0.433 inches (11.0 mm).
5. A golf club head comprising:
a body comprising a striking face section, a sole section extending from a lower edge of the striking face section, an upper opening, and a return section extending from an upper edge of the striking face section and disposed between the striking face section and the upper opening;
a crown insert permanently affixed to the body to close the upper opening and define a hollow body interior;
a sole insert; and first and second solid rods disposed within the hollow body interior and extending from the return section to the sole section, wherein the sole section comprises at least one cutout in communication with the hollow body interior, wherein the sole insert is permanently affixed to the body to close the at least one cutout, wherein no portion of either the first or second solid rods makes contact with the striking face section or each other when the striking face section impacts a golfball, wherein the striking face section comprises a face center and a rear face surface, wherein each of the first and second solid rods is located a first distance of less than 0.500 inches (12.7 mm) from the rear face surface along a vertical plane extending through the face center, the vertical plane extending along a vertical z-axis and a horizontal x-axis extending perpendicular to the striking face section, wherein the body is composed of a first material having a first density, and wherein the crown insert is composed of a second material having a second density that is lower than the first density;
AH26(21989796_1):MSD
2017276183 22 Jan 2019 wherein the first solid rod is spaced a second distance of 0.500 to 2.00 inches (12.7 to 50.8 mm) from the second solid rod, the second distance measured along a horizontal y-axis extending parallel to the striking face section and perpendicular to the vertical z-axis and horizontal x-axis;
wherein at least one of the first and second solid rods comprises an upper end proximate the return section and a lower end proximate the sole section, wherein the upper end is spaced a third distance from the rear face surface, wherein the lower end is spaced a fourth distance from the rear face surface, and wherein the third distance is less than the fourth distance;
wherein the third distance is 0.120 inches (3.05 mm) to 0.150 inches (3.81 mm); and wherein the fourth distance is 0.180 inches (4.57 mm) to 0.210 inches (5.33 mm).
6. The golf club head of claim 5, wherein the sole insert is composed of the second material, wherein the second material is a carbon composite material, and wherein the first material is a metal alloy.
7. The golf club head of claim 5 or 6, wherein the at least one cutout comprises first, second, and third cutouts.
8. The golf club head of any one of claims 5 to 7, wherein each of the first and second solid rods has a diameter of 0.050 inches (1.3 mm) to 0.200 inches (5.08 mm), and wherein the second distance is 0.75 inches (19 mm) to 1.50 inches (38.1 mm).
9. The gold club head of any one of claims 5 to 8, wherein the first distance is less than 0.433 inches (11.0 mm).
10. A golf club head comprising:
a body comprising a striking face section, a sole section extending from a lower edge of the striking face section, an upper opening, and a return section extending away from an upper edge of the striking face section and disposed between the striking face section and the upper opening;
a carbon composite crown section affixed to the body to close the upper opening and define a hollow body interior; and first and second solid rods disposed within the hollow body interior and extending from the return section to the sole section,
AH26(21989796_1):MSD
2017276183 22 Jan 2019 wherein the striking face section comprises a face center and a rear face surface, wherein each of the first and second solid rods is integrally cast with the body from a metal alloy material, wherein the sole section comprises first and second bosses extending into the hollow body interior, wherein the first boss corresponds to the first solid rod and the second boss corresponds to the second solid rod, wherein each of the first and second solid rods is located a first distance of less than 0.500 inches (12.7 mm) from the rear face surface along a vertical plane extending through the face center, the vertical plane extending along a vertical z-axis and a horizontal x-axis extending perpendicular to the striking face section, wherein no portion of either the first or second solid rods makes contact with the striking face section when the striking face section impacts a golfball, and wherein at least one of the first and second solid rods extends approximately parallel with the rear face surface;
wherein the first solid rod is spaced a second distance of 0.500 to 2.00 inches (12.7 to 50.8 mm) from the second solid rod, the second distance measured along a horizontal y-axis extending parallel to the striking face section and perpendicular to the vertical z-axis and horizontal x-axis;
wherein at least one of the first and second solid rods comprises an upper end proximate the return section and a lower end proximate the sole section, wherein the upper end is spaced a third distance from the rear face surface, wherein the lower end is spaced a fourth distance from the rear face surface, and wherein the third distance is less than the fourth distance;
wherein the third distance is 0.120 inches (3.05 mm) to 0.150 inches (3.81 mm); and wherein the fourth distance is 0.180 inches (4.57 mm) to 0.210 inches (5.33 mm).
11. The golf club head of claim 10, wherein the metal alloy material is selected from the group consisting of titanium alloy and steel.
12. The golf club head of claim 10 or 11, wherein each of the first and second solid rods has a diameter of 0.050 inches (1.3 mm) to 0.200 inches (5.08 mm), and wherein the second distance is 0.75 inches (19 mm) to 1.50 inches (38.1 mm).
AH26(21989796_1):MSD
2017276183 22 Jan 2019
13. The golf club head of any one claims 10 to 12, further comprising a sole insert, wherein the sole comprises a plurality of cutouts in communication with the hollow body interior, and wherein the sole insert is permanently affixed to the sole section to cover each of the plurality of cutouts.
14. The golf club head of any one of claims 10 to 13, wherein the golf club head has a volume of 420 cubic centimeters to 470 cubic centimeters.
15. The golf club head of any one of claims 10 to 14, wherein the first distance is less than 0.433 inches (11.00 mm).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| AU2017276183A AU2017276183B2 (en) | 2016-12-20 | 2017-12-12 | Golf club head having optimized ballspeed to CT relationship |
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| Application Number | Priority Date | Filing Date | Title |
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| US15/385,549 US9776058B2 (en) | 2012-06-27 | 2016-12-20 | Golf club head having optimized ball speed to CT relationship |
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| AU2017201152A AU2017201152B1 (en) | 2016-12-20 | 2017-02-21 | Golf club head having optimized ballspeed to CT relationship |
| AU2017276183A AU2017276183B2 (en) | 2016-12-20 | 2017-12-12 | Golf club head having optimized ballspeed to CT relationship |
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| AU2017201152A Division AU2017201152B1 (en) | 2016-12-20 | 2017-02-21 | Golf club head having optimized ballspeed to CT relationship |
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| AU2017276183A1 AU2017276183A1 (en) | 2018-01-04 |
| AU2017276183B2 true AU2017276183B2 (en) | 2019-02-14 |
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| AU2017276183A Active AU2017276183B2 (en) | 2016-12-20 | 2017-12-12 | Golf club head having optimized ballspeed to CT relationship |
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| AU2017201152A Active AU2017201152B1 (en) | 2016-12-20 | 2017-02-21 | Golf club head having optimized ballspeed to CT relationship |
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| JP (1) | JP6611364B2 (en) |
| AU (2) | AU2017201152B1 (en) |
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- 2017-01-12 JP JP2017003336A patent/JP6611364B2/en active Active
- 2017-02-21 AU AU2017201152A patent/AU2017201152B1/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| GB2558011A (en) | 2018-07-04 |
| JP2018099494A (en) | 2018-06-28 |
| GB2558011B (en) | 2019-01-09 |
| GB201704715D0 (en) | 2017-05-10 |
| AU2017201152B1 (en) | 2017-12-07 |
| JP6611364B2 (en) | 2019-11-27 |
| AU2017276183A1 (en) | 2018-01-04 |
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