WO2014152880A1 - Golf clu heads with optimized characteristics and related methods - Google Patents

Golf clu heads with optimized characteristics and related methods Download PDF

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Publication number
WO2014152880A1
WO2014152880A1 PCT/US2014/028099 US2014028099W WO2014152880A1 WO 2014152880 A1 WO2014152880 A1 WO 2014152880A1 US 2014028099 W US2014028099 W US 2014028099W WO 2014152880 A1 WO2014152880 A1 WO 2014152880A1
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WO
WIPO (PCT)
Prior art keywords
head
golf club
center
gravity
plane
Prior art date
Application number
PCT/US2014/028099
Other languages
English (en)
French (fr)
Other versions
WO2014152880A8 (en
Inventor
Bradley D. SCHWEIGERT
Ryan M. STOKKE
Original Assignee
Karsten Manufacturing Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US13/804,917 external-priority patent/US9168429B2/en
Priority claimed from US13/804,859 external-priority patent/US9144722B2/en
Priority claimed from US13/826,111 external-priority patent/US9186561B2/en
Priority to KR1020197007512A priority Critical patent/KR102269441B1/ko
Priority to JP2016502703A priority patent/JP6445521B2/ja
Priority to KR1020227012029A priority patent/KR102475910B1/ko
Priority to GB1517455.0A priority patent/GB2527002B/en
Priority to KR1020237000275A priority patent/KR20230010819A/ko
Application filed by Karsten Manufacturing Corporation filed Critical Karsten Manufacturing Corporation
Priority to KR1020237000276A priority patent/KR20230010820A/ko
Priority to CA2905053A priority patent/CA2905053C/en
Priority to KR1020157029015A priority patent/KR102104570B1/ko
Priority to KR1020217018974A priority patent/KR102386897B1/ko
Priority to CN201480024626.4A priority patent/CN105188861B/zh
Priority to AU2014236547A priority patent/AU2014236547B2/en
Priority to KR1020227042713A priority patent/KR102592771B1/ko
Publication of WO2014152880A1 publication Critical patent/WO2014152880A1/en
Publication of WO2014152880A8 publication Critical patent/WO2014152880A8/en

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Classifications

    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B53/0466Heads wood-type
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/02Ballast means for adjusting the centre of mass
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B53/0408Heads characterised by specific dimensions, e.g. thickness
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B53/0408Heads characterised by specific dimensions, e.g. thickness
    • A63B53/0412Volume
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B53/0433Heads with special sole configurations
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B53/0458Heads with non-uniform thickness of the impact face plate
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B53/0458Heads with non-uniform thickness of the impact face plate
    • A63B53/0462Heads with non-uniform thickness of the impact face plate characterised by tapering thickness of the impact face plate
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B53/047Heads iron-type
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B53/0487Heads for putters
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B2053/0491Heads with added weights, e.g. changeable, replaceable
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/32Golf

Definitions

  • the present disclosure relates generally to sports equipment, and relates, more particularly, to golf club heads with optimized characteristics and related methods.
  • Golf club heads often comprise different features that can be designed or configured to improve one or more of their performance characteristics. Innate interplay between such different features often exists, however, such that adjusting or configuring one feature may inherently alter another feature, often disadvantageously. As an example, expanding the strikeface of a golf club to provide a greater impact area can alter the location of the center of gravity of the golf club disadvantageously, and unintended performance consequences may ensue if features are not configured or designed in a balanced manner to account for the interplay between the different features.
  • FIG. 1 illustrates a front view of a golf club head in accordance with the present disclosure.
  • FIG. 2 illustrates a side cross-sectional view of the golf club head along line II- II of FIG. 1.
  • FIG. 3 illustrates a bottom view of the golf club head of FIGs. 1-2.
  • FIG. 4 illustrates a flowchart for a method that can be used to provide, form, and/or manufacture a golf club head in accordance with the present disclosure.
  • Couple should be broadly understood and refer to connecting two or more elements, mechanically or otherwise. Coupling (whether mechanical or otherwise) may be for any length of time, e.g., permanent or semi-permanent or only for an instant.
  • two or more elements are “integral” if they are comprised of the same piece of material. As defined herein, two or more elements are “non-integral” if each is comprised of a different piece of material.
  • a golf club head can comprise a head body comprising a head interior and a hosel structure.
  • the head interior can be bounded by a head front portion, a head rear portion, a head heel portion, a head toe portion, a head top portion, and a head sole portion.
  • the hosel structure can have a bore for receiving a golf club shaft, where the bore can have a hosel axis.
  • the golf club head can also comprise a head center of gravity, a head horizontal axis extending through the head center of gravity, from the head heel portion to the head toe portion, and parallel to a ground plane when the golf club head is at an address position over the ground plane, a hosel moment of inertia about the hosel axis, and a horizontal moment of inertia about the head horizontal axis.
  • the horizontal moment of inertia can be greater than or equal to 39% of the hosel moment of inertia.
  • a golf club head can comprise a head body comprising a head interior and a hosel structure.
  • the head interior can be bounded by a head front portion, a head rear portion, a head heel portion, a head toe portion, a head top portion, and a head sole portion.
  • the hosel structure can have a bore for receiving a golf club shaft, where the bore can have a hosel axis.
  • the golf club head can also comprise a head center of gravity, a head vertical axis extending through the head center of gravity, from the head top portion to the head sole portion, and perpendicular to a ground plane when the golf club head is at address over the ground plane, a hosel moment of inertia about the hosel axis, and a vertical moment of inertia about the head vertical axis.
  • the vertical moment of inertia can be greater than or equal to 59% of the hosel moment of inertia.
  • a method for providing a golf club head can comprise providing a head body having a head interior and a hosel structure.
  • the head interior can be bounded by a head front portion, a head rear portion, a head heel portion, a head toe portion, a head top portion, and a head sole portion.
  • the hosel structure can have a bore for receiving a golf club shaft, where the bore can have a hosel axis.
  • the method can also comprise coupling the golf club shaft to the hosel structure.
  • a head horizontal axis can extend through a head center of gravity of the golf club head, from the head heel portion to the head toe portion, and parallel to a ground plane when the golf club head is at an address position over the ground plane.
  • a head vertical axis can extend through the head center of gravity, from the head top portion to the head sole portion, and perpendicular to the ground plane when the golf club head is at address over the ground plane.
  • providing the head body can comprise at least one of: (a) establishing a horizontal moment of inertia about the head horizontal axis to be greater than or equal to 39% of a hosel moment of inertia about the hosel axis, or (b) establishing a vertical moment of inertia about the head vertical axis to be greater than or equal to 59% of the hosel moment of inertia about the hosel axis.
  • a golf club head can comprise a head body comprising a head front portion, a head rear portion, a head heel portion, a head toe portion, a head sole portion, a head top portion, and a hosel structure having a bore for receiving a golf club shaft, where the bore can have a hosel axis.
  • the golf club head can also comprise a strikeface at the head front portion and comprising a strikeface centerpoint, a head volume measured in cc's and comprising a head volume magnitude greater than 420, a head center of gravity, and an optimization characteristic.
  • a head vertical axis extends through the head center of gravity and is orthogonal to the ground plane
  • a head horizontal axis extends through the head center of gravity, and is orthogonal to the head vertical axis.
  • a loft plane of the golf club head can be tangent to the strikeface centerpoint.
  • a front plane of the golf club head can extend through the strikeface centerpoint and parallel to the hosel axis.
  • a head depth plane can extend through the strikeface centerpoint, parallel to the head horizontal axis and perpendicular to the loft plane.
  • a CG heiglit can axis extends through the head center of gravity and can intersect the head depth plane perpendicularly at a first intersection point.
  • a head CG height of the head center of gravity can be measured, along the CG height axis, between the head center of gravity and the first intersection point.
  • a head CG depth of the head center of gravity can be measured, parallel to the ground plane and orthogonal to the front plane, between (a) a second intersection point located at an intersection between the front plane and the ground plane, and (b) a third intersection point located at an intersection between the head vertical axis and the ground plane.
  • the optimization characteristic can be defined by (a) the head volume magnitude added to (b) a ratio between the head CG depth divided by an absolute value of the head CG height.
  • the optimization characteristic can be greater than or equal to 425.
  • a golf club head can comprise a head body comprising a head front portion, a head rear portion, a head heel portion, a head toe portion, a head sole portion, a head top portion, and a hosel structure having a bore for receiving a golf club shaft, where the bore can have a hosel axis.
  • the golf club head can also comprise a strikeface at the head front portion and comprising a strikeface centerpoint, and a head center of gravity.
  • a head vertical axis extends through the head center of gravity and is orthogonal to the ground plane
  • a head horizontal axis extends through the head center of gravity, and is orthogonal to the head vertical axis.
  • a loft plane of the golf club head can be tangent to the strikeface centerpoint.
  • a front plane of the golf club head can extend through the strikeface centerpoint and parallel to the hosel axis.
  • a head depth plane can extend through the strikeface centerpoint, parallel to the head horizontal axis and perpendicular to the loft plane.
  • a CG height axis can extend through the head center of gravity and can intersect the head depth plane perpendicularly at a first intersection point.
  • a head CG height of the head center of gravity can be measured, along the CG height axis, between the head center of gravity and the first intersection point.
  • a head CG depth of the head center of gravity can be measured, parallel to the ground plane and orthogonal to the front plane, between (a) a second intersection point located at an intersection between the front plane and the ground plane, and (b) a third intersection point located at an intersection between the head vertical axis and the ground plane.
  • An absolute value of the head CG height can be less than or equal to 2.54 mm.
  • the head CG depth can be greater than or equal to 40.64 mm.
  • a method for providing a golf club head can comprise providing a head body comprising a head front portion, a head rear portion, a head heel portion, a head toe portion, a head sole portion, a head top portion, and a hosel structure having a bore for receiving a golf club shaft, the bore having a hosel axis.
  • the method can also comprise coupling a strikeface at the head front portion, and establishing an optimization characteristic of the golf club head.
  • the strikeface comprises a strikeface centerpoint.
  • a head volume of the golf club head can be measured in cc's and can comprise a head volume magnitude greater than 420.
  • a head vertical axis can extend through the head center of gravity and can be orthogonal to the ground plane.
  • a head horizontal axis can extend through the head center of gravity, and can be orthogonal to the head vertical axis.
  • a loft plane of the golf club head can be tangent to the strikeface centerpoint.
  • a front plane of the golf club head can extend through the strikeface centerpoint and parallel to the hosel axis.
  • a head depth plane can extend through the strikeface centerpoint, parallel to the head horizontal axis and perpendicular to the loft plane.
  • a CG height axis can extend through the head center of gravity and can intersect the head depth plane perpendicularly at a first intersection point.
  • a head CG height of the head center of gravity can be measured, along the CG height axis, between the head center of gravity and the first intersection point.
  • a head CG depth of the head center of gravity can be measured, parallel to the ground plane and orthogonal to the front plane, between (a) a second intersection point located at an intersection between the front plane and the ground plane, and (b) a third intersection point located at an intersection between the head vertical axis and the ground plane.
  • the optimization characteristic can be established by (a) the head volume magnitude added to (b) a ratio between the head CG depth divided by an absolute value of the head CG height, where the optimization characteristic can be greater than or equal to 425.
  • a golf club head can comprise a head body, a face portion, and a head center of gravity, and at least one of a first performance characteristic or a second performance characteristic.
  • the head body can comprise a head front portion, a head rear portion, a head heel portion, a head toe portion, a head sole portion, a head top portion, and a hosel structure having a bore for receiving a golf club shaft, where the bore can have a hosel axis.
  • the face portion can be at the head front portion and can comprise a strikeface centerpoint, a strikeface perimeter, and a face height bounded by the strikeface perimeter.
  • a head vertical axis extends through the head center of gravity and is orthogonal to the ground plane
  • a head horizontal axis extends through the head center of gravity, and is orthogonal to the head vertical axis.
  • a loft plane of the golf club head can be tangent to the strikeface centerpoint.
  • a front plane of the golf club head can extend through the strikeface centerpoint and parallel to the hosel axis.
  • a head depth plane can extend through the strikeface centerpoint, parallel to the head horizontal axis and perpendicular to the loft plane.
  • a CG height axis can extend through the head center of gravity and can intersect the head depth plane perpendicularly at a first intersection point.
  • a head CG height of the head center of gravity can be measured, along the CG height axis, between the head center of gravity and the first intersection point.
  • a head CG depth of the head center of gravity can be measured, parallel to the ground plane and orthogonal to the front plane, between (a) a second intersection point located at an intersection between the front plane and the ground plane, and (b) a third intersection point located at an intersection between the head vertical axis and the ground plane.
  • the face height can be approximately 33 mm to approximately 71 mm, measured parallel to the loft plane.
  • the first performance characteristic can comprise the head CG height being less than or equal to approximately 5.08 mm.
  • the second performance characteristic can comprise a CG performance ratio of less than or equal to 0.56, as defined by (a) 76.2 mm minus the face height, divided by (b) the head CG depth.
  • a golf club head can comprise a head body, a face portion, and a head center of gravity.
  • the head body can comprise a head front portion, a head rear portion, a head heel portion, a head toe portion, a head sole portion, a head top portion, and a hosel structure having a bore for receiving a golf club shaft, the bore having a hosel axis.
  • the face portion can be coupled to the head front portion and can comprise a strikeface having a strikeface centerpoint, a strikeface perimeter, and a face height.
  • a head vertical axis extends through the head center of gravity and is orthogonal to the ground plane
  • a head horizontal axis extends through the head center of gravity, and is orthogonal to the head vertical axis.
  • a loft plane of the golf club head can be tangent to the strikeface centerpoint.
  • a front plane of the golf club head can extend through the strikeface centerpoint and parallel to the hosel axis.
  • a head depth plane can extend through the strikeface centerpoint, parallel to the head horizontal axis and perpendicular to the loft plane.
  • a CG height axis can extend through the head center of gravity and can intersect the head depth plane perpendicularly at a first intersection point.
  • a head CG height of the head center of gravity can be measured, along the CG height axis, between the head center of gravity and the first intersection point.
  • a head CG depth of the head center of gravity can be measured, parallel to the ground plane and orthogonal to the front plane, between (a) a second intersection point located at an intersection between the front plane and the ground plane, and (b) a third intersection point located at an intersection between the head vertical axis and the ground plane.
  • the face height can be approximately 33 mm to approximately 71 mm, as delimited by the strikeface perimeter and measured parallel to the loft plane.
  • a CG performance ratio between (a) 76.2 mm minus the face height, and (b) the head CG depth, is less than or equal to 0.56.
  • the head body can comprise a driver-type body.
  • a head volume of the golf club head can be approximately 420 cc to approximately 470 cc.
  • a head weight of the golf club head can be approximately 185 grams to approximately 225 grams.
  • the head CG height can be approximately 0 mm to approximately 3.18 mm.
  • the head CG depth can be approximately 25 mm to approximately 102 mm.
  • the head body can comprise a weight structure located towards the sole portion and the rear portion of the head body.
  • a method for providing a golf club head can comprise providing a head body having a head front portion, a head rear portion, a head heel portion, a head toe portion, a head sole portion, a head top portion, and a hosel structure having a bore for receiving a golf club shaft, the bore having a hosel axis.
  • the method can also comprise coupling a face portion to the head front portion, the face portion comprising a strikeface having a strikeface centerpoint, a strikeface perimeter, and a face height bounded by the strikeface perimeter.
  • the method an further comprise establishing at least one of: a first performance characteristic of the golf club head, or a second performance characteristic of the golf club head.
  • a head vertical axis extends through a head center of gravity of the golf club head and is orthogonal to the ground plane, and a head horizontal axis extends through the head center of gravity, and is orthogonal to the head vertical axis.
  • a loft plane of the golf club head can be tangent to the strikeface centerpoint.
  • a front plane of the golf club head can extend through the strikeface centerpoint and parallel to the hosel axis.
  • a head depth plane can extend through the strikeface centerpoint, parallel to the head horizontal axis and perpendicular to the loft plane.
  • a CG height axis can extend through the head center of gravity and can intersect the head depth plane perpendicularly at a first intersection point.
  • a head CG height of the golf club head can be measured, along the CG height axis, between the head center of gravity and the first intersection point.
  • a head CG depth of the head center of gravity can be measured, parallel to the ground plane and orthogonal to the front plane, between: (a) a second intersection point located at an intersection between the front plane and the ground plane, and (b) a third intersection point located at an intersection between the head vertical axis and the ground plane.
  • the face height can be approximately 33 mm to approximately 71 mm, measured parallel to the loft plane.
  • the first performance characteristic can comprise the head CG height being less than or equal to approximately 5.08 mm.
  • the second performance characteristic can comprise a CG performance ratio of less than or equal to 0.56, as defined by (a) 76.2 mm minus the face height, divided by (b) the head CG depth.
  • FIG. 1 illustrates a front view of golf club head 1000, comprising head body 1100 and face portion 1200. Face portion 1200 includes strikeface 1210.
  • FIG. 2 illustrates a side cross -sectional view of golf club head 1000 along line II- II of FIG. 1.
  • FIG. 3 illustrates a bottom view of golf club head 1000.
  • FIGs. 1-3 present golf club head 1000 at an address position relative to ground plane 1010, where hosel axis 1710 is at a 60-degree angle with ground plane 1010 with respect to a front view of golf club head 1000 (FIG. 1), and where hosel axis 1710 is substantially orthogonal to ground plane 1010 with respect to a side view of golf club head 1000 (FIG. 2).
  • head body 1 100 and face portion 1200 comprise separate pieces of material coupled together, for example, via a welding process.
  • face portion 1200 may comprise a single piece of material with one or more portions of head body 1100, such as head front portion 1 110, head top portion 1 120, head sole portion 1 130, head heel portion 1140, head toe portion 1 150, and/or head rear portion 2160.
  • Head forward surface 1160 of golf club head 1000 comprises strikeface 1210, face portion 1200, and at least part of head front portion 1 1 10. In some embodiments, head forward surface 1160 also can include at least part of head sole portion 1130.
  • head front portion 1 1 10 can include strikeface 1210 and/or face portion 1200.
  • Face portion 1200 comprises strikeface 1210 having strikeface centerpoint 1211, strikeface perimeter 1212, and face height 1213.
  • Strikeface centerpoint 1211 is located at a geometric centerpoint of strikeface perimeter 1212 in the present example, and at a midpoint of face height 1213.
  • strikeface centerpoint 121 1 also can be centered with respect to engineered impact zone 1250, which can be defined by a region of grooves 1259 of strikeface 1210.
  • strikeface centerpoint 121 1 can be located in accordance with the definition of a golf governing body such as the United States Golf Association (USGA).
  • USGA United States Golf Association
  • strikeface centerpoint 1211 can be determined in accordance with Section 6.1 of the USGA's Procedure for Measuring the Flexibility of a Golf Clubhead (USGA-TPX3004, Rev. 1.0.0, May 1, 2008) (available at http://ww ⁇ i3Sga.org/equipment/testins protocols/ Procedure-For- Measuring-The-Flexibility-Of-A-Golf-Club-Head (the "Flexibility Procedure").
  • Golf club head 1000 comprises loft plane 2270 (FIG. 2), which is at least tangent to strikeface centerpoint 121 1 at strikeface 1210. Face height 1213 can be measured parallel to loft plane 2270 between strikeface top end 1215 and strikeface bottom end 1216 of strikeface perimeter 1212, and can be of approximately 33 millimeters (mm) to approximately 71 mm in the present or other examples.
  • Strikeface perimeter 1212 comprising strikeface top end 1215 and strikeface bottom end 1216 defining face height 1213, need not bound an entirety of face portion 1200.
  • strikeface 1210 is bounded by strikeface perimeter 1212 and is only part of face portion 1200.
  • strikeface 1210 can comprise a roll radius and/or a bulge radius
  • strikeface perimeter 1212 can be defined along a transition boundary where a contour of face portion 1200 departs from the roll radius and/or the bulge radius of strikeface 1210.
  • FIG. 2 contains a zoom view of part of the top transition boundary of golf club head 1000, highlighting vertical roll radius 2170 extending along strikeface 1210, and showing how strikeface top end 1215 is located at the top transition boundary where head forward surface 1 160 departs from vertical roll radius 2170.
  • FIG. 2 also contains a zoom view of part of the bottom transition boundary of golf club head 1000, highlighting vertical roll radius 2170 extending vertically along strikeface 1210, and showing how strikeface bottom end 1216 is located at the bottom transition boundary where head forward surface 1160 departs from vertical roll radius 2170.
  • strikeface perimeter 1212 can be defined with respect to the edge of a strikeplate comprising the strikeface.
  • face portion 1200 comprises strikeplate 1220, where strikeface 1210 forms an exterior surface of faceplate 1220, and where strikeplate 1220 is joined to head front portion 1110 along strikeplate edge 1221.
  • strikeplate edge 1221 defines at least part of strikeface perimeter 1212, including the top and bottom sections of strikeface perimeter 1212 where strikeface top end 1215 and strikeface bottom end 1216 are respectively located to define face height 1213, but there can be other examples where the strikeplate edge of the strikeplate can define a majority or all of the strikeface perimeter of the strikeface.
  • golf club head 1000 also comprises head center of gravity (CG) 2500, head depth plane 2310, and CG height axis 2320, where head depth plane 2310 extends through strikeface centerpoint 121 1 and is perpendicular to loft plane 2270, and where CG height axis 2320 extends through head center of gravity 2500 and intersects head depth plane 2310 perpendicularly at intersection point 2801.
  • CG head center of gravity
  • Head center of gravity 2500 comprises CG height 2520 and CG depth 2510, which locate head center of gravity 2500 relative to golf club head 1000.
  • CG height 2520 can be measured along CG height axis 2320, between head center of gravity 2500 and intersection point 2801.
  • CG depth 2510 can be measured, as seen in FIG. 2, parallel to ground plane 1010 and between intersection points 2802-2803.
  • intersection point 2802 is defined by the intersection between ground plane 1010 and front plane 2280, witere front plane 2280 extends through strikeface centerpoint 1211 , is parallel to hosel axis 1710, and is orthogonal to ground plane 1010 when golf club head 1000 is at the address position.
  • intersection point 2803 is defined by the intersection between ground plane 1010 and head vertical axis 1610, where head vertical axis 1610 extends through head center of gravity 2500, and is orthogonal to ground plane 1010 when golf club head 1000 is at the address position.
  • Head center of gravity 2500 can also be located relative to ground plane 1010, where head CG elevation 2530 of head center of gravity 2500 can be measured along head vertical axis 1610, between weight center 2750 and ground plane 1010.
  • Head body 1100 of golf club head 1000 also comprises hosel stnicture 1217 (FIG. 1) and hosel axis 1710 extending along a center of a bore of hosel structure 1217.
  • a hosel coupling mechanism of golf club head 1000 comprises hosel stnicture 1217 and shaft sleeve 1411 , where shaft sleeve 141 1 can be coupled to an end of golf shaft 1410.
  • Shaft sleeve 141 1 can couple with hosel stnicture 1217 in a plurality of configurations, thereby permitting golf shaft 1410 to be secured to hosel structure 1217 at a plurality of angles relative to hosel axis 1710.
  • shaft 1410 can be non-adjustably secured to hosel structure 1217.
  • Golf club heads in accordance with the present disclosure can be configured to exhibit one or more optimization characteristics that optimize or balance the performance thereof.
  • one characteristic of golf club heads that the present designs strive to optimize is that of face height and/or face size. Maximizing the face height and/or face size of a golf club head can have several benefits, such as increasing the target impact area of the strikeface to yield a more forgiving club head that produces better results for golf shots that are hit off-center of the strikeface centerpoint.
  • a strikeface of larger height and/or size can provide for better energy transfer to the golf ball upon impact therewith, and may thus increase a characteristic time or a "spring effect" of the golf club head to achieve golf shots of longer distance.
  • the height or size of the strikeface may be augmented to achieve a characteristic time limit set by a golf governing body, such as the characteristic time limit of 239 microseconds ( ⁇ ) set by the USGA in its Flexibility Procedure.
  • increasing face height and/or size can raise the CG height between the center of gravity and the head depth plane to elevate the center of gravity away from the sole of the golf club head, thereby inhibiting a gear effect between the strikeface and the golf ball, thus preventing the golf club head from decreasing the amount of backspin of the golf ball created upon impact, and thus decreasing the distance the ball will travel due to the backspin.
  • strikeface 1210 has been increased to comprise an augmented face size and/or face height 1213 to provide a larger impact area and greater energy transfer to golf ball 2900.
  • golf club head 1000 can be configured so that face height 1213 can be of approximately 33 mm to approximately 71 mm to provide greater impact area and energy transfer upon impact with golf ball 2900.
  • an area of strikeface 1210, including the augmented face area can be of approximately 23.6 centimeters squared (cm 2 ) to approximately 45.2 cm 2 .
  • golf club head 1000 still restricts CG height 2520 from increasing towards head top portion 1 120 and/or from straying too far from head depth plane 2310.
  • golf club head 1000 comprises a first optimization characteristic satisfying Relation 1 below:
  • CG height 2520 can be of approximately 0 mm up to Relation l 's limit of 5.08 mm. CG height 2520 can also be of up to a maximum of approximately 4.45 mm, 3.81 mm, or 3.18 mm in other examples.
  • the first optimization characteristic can decrease the backspin of golf ball 2900 via a gear effect between strikeface 1210 and golf ball 2900 for better performance.
  • head center of gravity 2500 is shown in FIG.
  • golf club head 1000 still restricts center of gravity 2500 from moving towards strikeface 1212, thereby preventing CG depth 2510 from unduly decreasing.
  • golf club head 1000 comprises a second optimization characteristic satisfying Relation 2 below:
  • the relationship between face height 1213 and CG depth 2510 is balanced pursuant to Relation 2 to maintain the second optimization characteristic of less than or equal to 0.56, thereby limiting the amount that CG depth 2510 can decrease towards strikeface 1210.
  • CG depth 2510 can be approximately 25 mm to approximately 102 mm.
  • CG depth 2510 can be at least approximately 39 mm.
  • the second optimization characteristic can increase or optimize at least one of a dynamic loft of golf club head 1000 or a launch angle of golf ball 2900 upon impact therebetween.
  • golf club head 1000 may be configured to comprise only one of the first or second optimization characteristics described above.
  • golf club head 1000 may comprise the first optimization characteristic and not the second optimization characteristic, thus satisfying Relation 1 without having to satisfy Relation 2.
  • golf club head 1000 may comprise the second optimization characteristic and not the first optimization characteristic, thus satisfying Relation 2 without having to satisfy Relation 1.
  • golf club head 1000 satisfies both Relations 1 and 2, and thus comprises the first and second optimization characteristics.
  • Golf club head 1000 can also comprise a third optimization characteristic with respect to head volume (HV) 2600 thereof.
  • HV head volume
  • head body 1000 of golf club head 1000 comprises a driver-type body with a head volume greater than or equal to 420 cubic centimeters (cc), and thus has a head volume magnitude greater than or equal to 420.
  • head body 1000 can comprise a head volume of 420 cc, thus having a head volume magnitude of 420.
  • golf club head 1000 can comprise a head volume of 460 cc, thus having a head volume magnitude of 460.
  • Golf club head 1000 can comprise a head volume up to approximately 470 cc, in some implementations, and'Or a total head weight of approximately 185 grams to approximately 225 grams. In some specific examples, the total head weight can be approximately 202 grams, and/or the head volume can be of approximately 460 cc.
  • the third optimization characteristic can control the relationship between head volume 2600 and the location of center of gravity 2500, and can be defined to satisfy Relation 3 below:
  • head volume 2600 can be increased to adjust, for instance, a moment of inertia (MOI) of golf club head 1000.
  • MOI moment of inertia
  • An unrestrained increase in head volume can have detrimental effects with respect to other characteristics of the golf club head.
  • increasing head volume 2600 can cause head center of gravity 2500 to shift towards head front portion 1110, towards head top portion 1120, towards other undesired directions, and/or away from a desired center of gravity location or direction(s), thereby hampering the performance of golf club head 1000.
  • Such undesired changes in the center of gravity location can detrimentally affect one or more characteristics of the golf club head, such as launch speed, launch angle, gear effect, backspin, and or shot distance.
  • the third optimization characteristic used to balance the relationship between head volume 2600 and the location of head center of gravity 2500 can be established to yield desirable and balanced attributes for golf club head 1000.
  • a weight distribution of golf club head 1000 can be configured to satisfy Relation 3 so that golf club head 1000 can exhibit the third optimization characteristic, thereby permitting head volume 2600 to be augmented for greater moment of inertia and greater energy transfer to golf ball 2900 upon a golf impact between strikeface 1210 and golf ball 2900.
  • the weight distribution of golf club head 1000 can be configured for restricting CG depth 2510 from decreasing towards head front portion 1 1 10 due to the augmented head volume 2600, thus increasing at least one of a dynamic loft of strikeface 1210 or a launch angle of golf ball 2900 upon the golf impact.
  • the weight distribution of golf club head 1000 can be configured for restricting CG height 2520 from increasing towards head top portion 1120 as a result of the augmented head volume 2600, thereby decreasing a backspin of golf ball 2900 via a gear effect between strikeface 1210 and golf ball 2900 upon the golf impact.
  • CG depth 2510 can be configured to be greater than or equal to 40.64 mm.
  • the absolute value of CG height 2520 can be less than or equal to 2.54 mm.
  • CG height 2520 is characterized as an absolute value, considering that head center of gravity 2500 can be above or below head depth plane 2310 in some embodiments.
  • the third optimization characteristic has a lower bound of at least 425, there can be other embodiments where the third optimization characteristic can be defined with respect to other lower bounds.
  • the third optimization characteristic can comprise a lower bound of at least 435 or 445 in some implementations.
  • the location of head center of gravity 2500 can also be designed or configured with respect to other features of golf club head 1000 in order to satisfy Relation 3 and/or to attain the third optimization characteristic.
  • the location of head center of gravity 2500 can be configured such that CG depth 2510 comprises between approximately 25% to approximately 80% of head depth length 2312, where head depth length 2312 is measured from strikeface centerpoint 121 1 to an intersection of an exterior of head rear portion 2160 by head depth plane 2310.
  • the location of head center of gravity 2500 can be configured such that CG height 2520 comprises between approximately 0% to approximately 13% of CG height axis length 2322, where CG height axis length 2322 is measured from an intersection of an exterior of head top portion 1 120 by CG height axis 2320, to an intersection of an exterior of head sole portion 1 130 by CG height axis 2320.
  • Golf club head 1000 also can comprise a fourth optimization characteristic with respect to a balance between hosel MOI 1711 (FIG. 1) and horizontal MOI 181 1 (FIG. 1).
  • Hosel MOI 1711 is defined about hosel axis 1710.
  • Horizontal MOI 1811 is defined about head horizontal axis 1810, which extends through head center of gravity 2500, from head heel portion 1 140 to head toe portion 1 150, and parallel to ground plane 1010 when golf club head 1000 is at the address position over ground plane 1010.
  • horizontal MOI 181 1 can be increased to restrict a rotation of golf club head 1000 about head horizontal axis 1810 when strikeface 1210 hits golf ball 2600 off-center towards head top portion 1120 or head sole portion 1130, thereby increasing the forgiveness of golf club head 1000 for such high or low mis-hits.
  • weight may be added or repositioned towards head front portion 1110 and/or head rear portion 2160.
  • golf club head 1000 can be lengthened towards head front portion 1 110 and/or head rear portion 2160.
  • Such adjustments or changes to increase horizontal MOI 181 1 can be made up to a point, however, before they start affecting other golf club head characteristics.
  • unrestrained adjustments to increase horizontal MOI 1811 can lead to an undue increase in hosel MOI 171 1 if not properly balanced, thereby increasing the resistance of golf club head 1000 to rotate about hosel axis 1710, an thus making it hard for a person to "turn over" the golf club during a golf swing for proper positioning or “squaring” of golf club head 1000 at impact with golf ball 2600.
  • An increase in hosel MOI 171 1 also can restrict or reduce a gearing effect between golf ball 2600 and strikeface 1210 that would otherwise impart some corrective spin to golf ball 2600 during off- center impacts.
  • golf club head 1000 can be designed to limit the distance between hosel axis 1710 and any additional or discretionary mass of golf club head 1000.
  • Such approaches to decrease hosel MOI 171 1, if not properly balanced, can be incompatible with some of the approaches described above to increase horizontal MOI 181 1. Accordingly, weight addition or redistribution for golf club head 1000 to increase horizontal MOI 1811 should be balanced with respect to maintaining or restricting an increase in hosel MOI 1711.
  • the fourth optimization characteristic of golf club head 1000 controls the relationship between horizontal MOI 1811 and hosel MOI 171 1 to satisfy to satisfy Relation 4 below:
  • golf club head 1000 can be configured so that its fourth optimization characteristic can surpass the requirements of Relation 4.
  • the fourth optimization characteristic of golf club head 1000 can be configured so that horizontal MOI 181 1 is greater than or equal to 40% of hosel MOI 1711, greater than or equal to 45% of hosel MOI 171 1, or greater than or equal to 50% of hosel MOI 171 1.
  • horizontal MOI 181 1 is approximately 3740 grams-square-centimeter (g em 2 ), but there can be examples where it can range between approximately 2800 g-cm 2 to approximately 4300 g-cm 2 .
  • Hosel MOI 171 1 is approximately 9370 g-cm 2 in the present example, but can range between approximately 7000 g-cm 2 and approximately 1 1,000 g-cm 2 in the same or other examples.
  • Golf club head 1000 also can comprise a fifth optimization characteristic with respect to a balance between hosel MOI 171 1 and vertical MOI 161 1 (FIG. 1).
  • Vertical MOI 1611 is defined about head vertical axis 1610, which extends through head center of gravity 2500, from head top portion 1120 to head sole portion 1 130, and orthogonal to ground plane 1010 when golf club head 1000 is at the address position.
  • Vertical MOI 1611 is approximately 5300 g-cm 2 in the present example, but can range between approximately 4700 g-cm 2 and approximately 6000 g-cm 2 in the same or other examples.
  • vertical MOI 1611 can be increased to restrict a rotation of golf club head
  • weight can be added or repositioned towards head heel portion 1 140 and/or head toe portion 1150.
  • the golf club head can be lengthened towards head heel portion 1140 and/or head toe portion 1150.
  • Such adjustments or changes to increase vertical MOI 161 1 can be made up to a point, however, before they start affecting other golf club head characteristics.
  • unrestrained adjustments to increase vertical MOI 161 1 can lead to undue increase in hosel MOI 1711 if not properly balanced, thereby increasing the resistance of golf club head 1000 to rotate about hosel axis 1710 as described above.
  • some approaches to decrease hosel MOI 171 1, if not properly balanced can be incompatible with some of the approaches described above to increase vertical MOI 161 1. Accordingly, weight addition or redistribution for golf club head 1000 to increase vertical MOI 1611 should be balanced with respect to maintaining or restricting an increase in hosel MOI 1711.
  • the fifth optimization characteristic of golf club head 1000 controls the relationship between vertical MOI 1611 and hosel MOI 1711 to satisfy Relation 5 below:
  • golf club head 1000 can be configured so that its fifth optimization characteristic can surpass the requirements of Relation 5.
  • the fifth optimization characteristic of golf club head 1000 can be configured so that vertical MOI 161 1 is greater than or equal to 60% of hosel MOI 1711 , greater than or equal to 65% of hosel MOI 1711, or greater than or equal to 70% of hosel MOI 171 1.
  • golf club head 1000 can be configured so that its fourth optimization characteristic satisfies Relation 4, while its fifth optimization characteristic also satisfies Relation 5.
  • golf club head 1000 can be configured to exhibit the first, second, third, fourth, and/or fifth optimization characteristics described above by adjusting a distribution of mass or a relationship between different elements of golf club head 1000.
  • golf club head 1000 can comprise weight structure 2700, located towards head sole portion 1 130 and head rear portion 2160, as seen in FIGs. 2-3.
  • weight structure 2700 can be designed and/or located to satisfy the constraints imposed by Relation(s) 1 , 2, 3, 4, and/or 5, thereby balancing the face height or size of strikeface 1210, head volume 2600, the location of center of gravity 2500, and/or the different moments of inertia of golf club head 1000.
  • weight structure 2700 can be located relative to clock grid 3500, which can be aligned with respect to strikeface 1210.
  • clock grid 3500 comprises 12 o'clock ray 3512, which is aligned with strikeface centerpoint 121 1 in the present embodiment.
  • 12 o'clock ray 3512 is orthogonal to front intersection line 3271, which is defined by the intersection of loft plane 2270 (FIGs. 2-3) and ground plane 1010 (FIGs. 1-2).
  • Clock grid 3500 can be centered along 12 o'clock ray 3512, at a midpoint between a front end of front portion 1110 and a rear end of rear portion 2160.
  • clock grid centerpoint 3515 can be centered proximate to a geometric centerpoint of golf club head 1000.
  • Clock grid 3500 also comprises 3 o'clock ray 3503 extending towards head heel portion 1140, and 9 o'clock ray 3509 extending towards head toe portion 1150.
  • Weight perimeter 2705 of weight structure 2700 is located in the present embodiment towards head rear portion 2160, at least partially bounded between 4 o'clock ray 3504 and 8 o'clock ray 3508 of clock grid 3500, while weight center 2750 is located between 5 o'clock ray 3505 and 7 o'clock ray 3507. In examples such as the present one, weight perimeter 2705 is fully bounded between 4 o'clock ray 3504 and 8 o'clock ray 3508. Although weight perimeter 2705 is defined external to golf club head 1000 in the present example, there can be other examples where weight perimeter may extend into an interior of, or be defined within, golf club head 1000. In some examples, the location of weight 2700 can be established with respect to a broader area.
  • weight perimeter 2705 of weight structure 2700 can be located towards head rear portion 2160, at least partially bounded between 4 o'clock ray 3504 and 9 o'clock ray 3509 of clock grid 3500, while weight center 2750 can be located between 5 o'clock ray 3505 and 8 o'clock ray 3508.
  • weight structure 2700 can extend or be shifted towards heel portion 1140.
  • weight perimeter 2705 and/or weight center 2750 can be shifted towards 4 o'clock ray 3504 than towards 9 o'clock ray 3509.
  • Biasing weight structure 2700 towards head heel end 1 140 can permit a decrease in hosel MOI 171 1 about hosel axis 1710 by limiting the distance between hosel axis 1710 and weight structure 2700, thereby allowing easier turning of golf club head 1000 about hosel axis 1710 during a swing.
  • weight structure 2700 can comprise a mass of approximately 2 grams to approximately 50 grams, and/or a volume of approximately 1 cc to approximately 30 cc. In the present example, weight structure 2700 protrudes from the external contour of head sole portion 1 130, and is thus at least partially external to allow for greater adjustment of head center of gravity 2500.
  • Weight structure 2700 can comprise removable weight 2790 in the same or other examples, where removable weight 2790 can comprise a mass of approximately 0.5 grams to approximately 30 grams, and can be replaced with one or more other similar weights to adjust the location of head center of gravity 2500 if needed to satisfy Relation(s) 1, 2, 3, 4, and/or 5.
  • weight center 2750 can comprise at least one of a center of gravity of weight structure 2700, a center of gravity of removable weight 2790, a geometric center of weight structure 2700, and/or a geometric center of removable weight 2790.
  • Weight center 2750 can be located with respect to ground plane 1010 and weight center elevation axis 2340, which extends between weight center 2750 and ground plane 1010. Weight center elevation axis 2340 is orthogonal to ground plane 1010 when golf club head 1000 is at the address position. W eight center elevation 2730 for weight center 2750 can thus be measured along weight center elevation axis 2340, between weight center 2750 and ground plane 1010. hi addition, weight center depth 2710 for weight center 2750 can be measured, parallel to ground plane 1010, between intersection points 2802 and 2804. In the present example, intersection point 2804 is defined by the intersection between ground plane 1010 and weight center elevation axis 2340 when golf club head 1000 is at the address position. Weight center 2750 can be located in the same or other embodiments such that weight distance 2751 (FIG. 2), which separates head center of gravity 2500 from weight center 2750, can be approximately 25 mm to approximately 102 mm.
  • weight distance 2751 FIG. 2
  • face portion 1200 can comprise a reduced thickness, which may be reinforced as needed with one or more reinforcing structures at the backside of strikeface 1210 and/or at the junction between face portion 1200 and head front portion 11 10.
  • Other mass redistribution mechanisms can be employed as w r ell if desired to satisfy Relation(s) 1 , 2, 3, 4, and/or 5.
  • a relationship or ratio between head center of gravity 2500 and weight center 2750 can be configured to permit one or more or Relation(s) 1, 2, 3, 4, or 5 to be satisfied.
  • an elevation ratio defined by the ratio of weight center elevation 2730 over head CG elevation 2530
  • a depth ratio defined by the ratio of weight center depth 2710 over head CG depth 2510
  • head CG elevation 2530 can be less than approximately 28.5 mm
  • weight center elevation 2730 can be less than approximately 12.5 mm
  • weight center depth 2710 can be greater than approximately 99.7 mm.
  • FIG. 4 illustrates a flowchart for method 4000, which can be used to provide, form, and/or manufacture a golf club head in accordance with the present disclosure, hi some examples, the golf club head can be similar to golf club head 1000 (FIGs. 1-3) presented above.
  • Method 4000 comprises block 4100 for providing a head body of a golf club head comprising a head front portion.
  • the head body can be similar to head body 1100 (FIGs. 1- 3), and the head front portion can be similar to head front portion 1 1 10 (FIGs. 1-3).
  • Block 4200 of method 4000 comprises coupling a face portion to the head front portion, the head front portion comprising a strikeface with an augmented face size.
  • the face portion can be similar to face portion 1200 (FIGs. 1-2), with strikeface 1210 having the augmented face size described above with respect thereto.
  • the augmented face size of the strikeface may permit its face height to be of up to approximately 71 mm in some examples.
  • Method 4000 can comprise block 4300 for configuring the golf club head to comprise a first optimization characteristic, where a CG height between a center of gravity of the golf club head and a head depth plane of the golf club head can be approximately 0 mm to approximately 5.08 mm or 0.200 inches.
  • the first optimization characteristic can be similar to that described above with respect to Relation 1 for balancing golf club head face height or size with respect to center of gravity height, hi some examples, the CG height may be similar to CG height 2520 (FIG. 2); the center of gravity may be similar to head center of gravity 2500 (FIG. 2); and the head depth plane can be similar to head depth plane 2310 (FIG. 2).
  • method 4000 can comprise block 4400 for configuring the golf club head to comprise a second optimization characteristic, where a ratio between (a) 76.2 mm (or approximately 3.0 inches) minus the face height and (b) a CG depth between the strikeface centerpoint and the center of gravity, is less than 0.56.
  • the second optimization characteristic can be similar to that described above with respect to Relation 2 for balancing golf club head face height or size with respect to center of gravity depth.
  • the face height can be similar to face height 1213
  • the CG depth can be similar to CG depth 2510.
  • method 4000 can comprise block 4500 for configuring the golf club head to comprise a third optimization characteristic where a head volume magnitude, added to a ratio between the CG depth and the CG height, is greater than or equal to 425.
  • the third optimization characteristic can be similar to that described above with respect to Relation 3 for balancing head volume relative to center of gravity location.
  • the head volume magnitude can be similar to the magnitude of head volume 2600 (FIG. 2)
  • the CG depth can be similar to CG depth 2510
  • the CG height can be similar to CG height 2520.
  • Method 4000 can comprise block 4600 in some embodiments for configuring the golf club head to comprise a fourth optimization characteristic, where the golf club head's horizontal moment of inertia is greater than or equal to 39% of its hosel moment of inertia.
  • the fourth optimization characteristic can be similar to that described above with respect to Relation 4 for balancing horizontal MOI 181 1 with respect to hosel MOI 171 1 (FIG. 1 ).
  • the magnitude of the horizontal moment of inertia can be similar to that described above with respect to horizontal MOI 1811.
  • the magnitude of the hosel moment of inertia can be similar to that described above with respect to hosel MOI 171 1.
  • the horizontal moment of inertia and/or the hosel moment of mertia can be balanced with respect to other features, such as with respect to a vertical moment of inertia of the golf club head.
  • Block 4700 of method 4000 can be carried out in some implementations for configuring the golf club head to comprise a fifth optimization characteristic, where the golf club head's vertical moment of inertia is greater than or equal to 59% of its hosel moment of inertia.
  • the fifth optimization characteristic can be similar to that described above with respect to Relation 5 for balancing vertical MOI 161 1 with respect to hosel MOI 1711 (FIG. 1 ).
  • the magnitude of the vertical moment of inertia can be similar to that described above with respect to vertical MOI 1611.
  • the magnitude of the hosel moment of inertia can be similar to that described above with respect to hosel MOI 171 1.
  • the vertical moment of inertia and/or the hosel moment of inertia can be balanced with respect to other features, such as with respect to the horizontal moment of inertia of block 4500.
  • method 4000 also comprises block 4800 for providing a mass redistribution mechanism to adjust the center of gravity of the golf club head.
  • the mass redistribution mechanism can be configured to permit the golf club head to achieve the requirements of block 4300, block 4400, block 4500, block 4600, and/or block 4700 of method 4000.
  • the mass redistribution mechanism can comprise a weight structure, such as weight structure 2700 (FIGs. 2-3), which can adjust the location of the center of gravity towards the sole and/or the rear portion of the golf club head if desired.
  • the mass redistribution mechanism can comprise a reduced thickness of the face portion of the golf club head, which may be reinforced if needed with one or more reinforcing structures, such as at the backside of the strikeface, and/or at a junction between the face portion and the head body of the golf club head.
  • one or more of the different blocks of method 4000 can be combined into a single block or performed simultaneously, and/or the sequence of such blocks can be changed.
  • blocks 4100 and 4200 may be combined in some embodiments, such as where the face portion and at least one portion of the head body comprise a single piece of material.
  • Block 4800 may be combined with one or more of blocks 4100, 4300, 4400, 4500, 4600, and/or 4700 in the same or other examples, and may be achieved simultaneously by adjusting the center of gravity, the face height, the face size, the head volume, and/or one or more moments of inertia of the golf club head, such as via the mass redistribution mechanism of block 4800.
  • some of the blocks of method 4000 can be subdivided into several sub-blocks.
  • block 4100 can be subdivided into several sub-blocks for providing different portions of the head body of the golf club head.
  • method 4000 can comprise further or different blocks.
  • method 4000 may comprise another block for providing or coupling a golf club shaft to the head body of block 4100.
  • method 4100 can comprise only part of the blocks described above.
  • blocks 4300, 4400, 4500, 4600, and/or 4700 may be optional in some implementations, and/or block 4800 may be skipped if not needed to achieve the requirements of block 4300, block 4400, block 4500, block 4600, and/or block 4700.
  • Other variations can be implemented for method 4000 without departing from the scope of the present disclosure.
  • the apparatus, methods, and articles of manufacture described herein may be applicable to other types of golf club such as a fairway wood-type golf club, a hybrid-type golf club, an iron-type golf club, a wedge-type golf club, or a putter-type golf club.
  • the apparatus, methods, and articles of manufacture described herein may be applicable other type of sports equipment such as a hockey stick, a tennis racket, a fishing pole, a ski pole, etc.
  • golf equipment related to the apparatus, methods, and articles of manufacture described herein may be conforming or non-conforming to the rules of golf at any particular time. Accordingly, golf equipment related to the apparatus, methods, and articles of manufacture described herein may be advertised, offered for sale, and/or sold as conforming or non-conforming golf equipment.
  • the apparatus, methods, and articles of manufacture described herein are not limited in this regard.
  • embodiments and limitations disclosed herein are not dedicated to the public under the doctrine of dedication if the embodiments and/or limitations: (1) are not expressly claimed in the claims; and (2) are or are potentially equivalents of express elements and/or limitations in the claims under the doctrine of equivalents.

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PCT/US2014/028099 2013-03-14 2014-03-14 Golf clu heads with optimized characteristics and related methods WO2014152880A1 (en)

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CN201480024626.4A CN105188861B (zh) 2013-03-14 2014-03-14 具有优化特性的高尔夫球杆头及相关方法
AU2014236547A AU2014236547B2 (en) 2013-03-14 2014-03-14 Golf club heads with optimized characteristics and related methods
KR1020227042713A KR102592771B1 (ko) 2013-03-14 2014-03-14 최적화된 특성을 갖는 골프 클럽 헤드 및 관련 방법
CA2905053A CA2905053C (en) 2013-03-14 2014-03-14 Golf club heads with optimized characteristics and related methods
KR1020227012029A KR102475910B1 (ko) 2013-03-14 2014-03-14 최적화된 특성을 갖는 골프 클럽 헤드 및 관련 방법
GB1517455.0A GB2527002B (en) 2013-03-14 2014-03-14 Golf club heads with optimized characteristics and related methods
KR1020237000275A KR20230010819A (ko) 2013-03-14 2014-03-14 최적화된 특성을 갖는 골프 클럽 헤드 및 관련 방법
KR1020197007512A KR102269441B1 (ko) 2013-03-14 2014-03-14 최적화된 특성을 갖는 골프 클럽 헤드 및 관련 방법
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JP2016502703A JP6445521B2 (ja) 2013-03-14 2014-03-14 最適化特性を備えたゴルフクラブヘッド及び関連方法
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