US20110183776A1 - Golf club head with sound tuning - Google Patents

Golf club head with sound tuning Download PDF

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Publication number
US20110183776A1
US20110183776A1 US12/694,955 US69495510A US2011183776A1 US 20110183776 A1 US20110183776 A1 US 20110183776A1 US 69495510 A US69495510 A US 69495510A US 2011183776 A1 US2011183776 A1 US 2011183776A1
Authority
US
United States
Prior art keywords
sole
crown
club head
thickness
golf club
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/694,955
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English (en)
Inventor
Joshua G. Breier
Oswaldo Gonzalez
Douglas E. Roberts
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cobra Golf Inc
Original Assignee
Cobra Golf Inc
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
Application filed by Cobra Golf Inc filed Critical Cobra Golf Inc
Priority to US12/694,955 priority Critical patent/US20110183776A1/en
Assigned to ACUSHNET COMPANY reassignment ACUSHNET COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ROBERTS, DOUGLAS E., BREIER, JOSHUA G., GONZALEZ, OSWALDO
Assigned to COBRA GOLF, INC reassignment COBRA GOLF, INC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ACUSHNET COMPANY
Priority to EP11000417A priority patent/EP2353667A2/de
Priority to JP2011013011A priority patent/JP2011152418A/ja
Priority to CN2011100324115A priority patent/CN102151392A/zh
Publication of US20110183776A1 publication Critical patent/US20110183776A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • 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
    • 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
    • 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
    • A63B53/0433—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

Definitions

  • This invention generally relates to golf club heads, and more specifically to hollow golf club heads including sound tuning features.
  • Previous attempts to tune the sound of the golf club heads have generally included adding material to increase the rigidity of a portion of the club head that exhibits a maximum vibrational displacement caused by impact with a golf ball.
  • ribs are often incorporated into the crown and/or sole of the golf club head to increase the rigidity of those portions.
  • the addition of ribs in the sole and crown reduces the discretionary mass of the club head and forces additional mass to be placed in less ideal locations for manipulating the center of gravity and the moment of inertia of the club head.
  • a hollow body golf club head includes rib-like walls that form the inner surface of the sole and crown. The sound emitted into the hollow cavity due to contact with a golf ball is directed rearward and parted laterally by the ribs. Sound bars are included in some embodiments that are located a small distance behind the club face and extends between the crown and sole. The sound bars are included to further part the sound vibrations.
  • the golf club head includes a sound plate that is suspended in the hollow body of the club head that makes a sound and echoes the sound during impact between the club head and a golf ball.
  • One edge of the sound plate is fixed to a wall of the hollow club head and the remaining edges are unattached so that the sound plate is able to vibrate relative to the remainder of the club head.
  • the invention is directed to a golf club head with sound tuning so that the vibration characteristics of the golf club head may be altered to produce a desired sound.
  • a golf club head includes a body including a crown portion and a sole portion and defines an interior cavity.
  • the crown portion includes a first crown thickness area having a first crown thickness, a second crown thickness area having a second crown thickness that is greater than the first crown thickness, and a crown transition.
  • the crown transition defines an interface between the first crown thickness area and the second crown thickness area and is located on the crown portion at a location that exhibits at least 75% of a maximum displacement of a vibration mode having a frequency less than about 3600 Hz.
  • the sole portion includes a first sole thickness area having a first sole thickness, a second sole thickness area having a second sole thickness that is greater than the first sole thickness, and a sole transition.
  • the sole transition defines an interface between the first sole thickness area and the second sole thickness area and is located on the sole portion at a location that exhibits at least 75% of a maximum displacement of a vibration mode having a frequency less than about 4100 Hz.
  • a golf club head in another embodiment, includes a body and a truss system.
  • the body includes a crown portion and a sole portion and defines an interior cavity.
  • the truss system comprises a first rib disposed on the sole portion.
  • the sole portion includes a first sole thickness area having a first sole thickness, a second sole thickness area having a second sole thickness that is greater than the first sole thickness, and a sole transition.
  • the sole transition defines an interface between the first sole thickness area and the second sole thickness area and is located on the sole portion at a location that exhibits at least 75% of a maximum displacement of a vibration mode having a frequency less than about 4100 Hz.
  • the first rib intersects the first sole thickness area and the second sole thickness area.
  • a golf club head in a further embodiment, includes a body including a crown portion and a sole portion and defines an interior cavity.
  • the crown portion includes a first crown thickness area having a first crown thickness, a second crown thickness area having a second crown thickness that is greater than the first crown thickness, and a crown transition.
  • the crown transition defines an interface between the first crown thickness area and the second crown thickness area and is located on the crown portion at a location that is within about 15 mm of an area of maximum displacement of a vibration mode having a frequency less than about 3600 Hz.
  • the crown transition has a length less than about 2.00 mm and is radiused such that the radius is tangent to the first crown thickness area.
  • FIG. 1 is a perspective view of a golf club head including sound tuning features according to the present invention
  • FIG. 2 is a bottom schematic view of a golf club head without sound tuning features illustrating the topography of a vibration mode
  • FIG. 3 is another bottom schematic view of the golf club head of FIG. 2 including sound tuning features illustrating the altered topography of the vibration mode;
  • FIG. 4 is a top schematic view of a golf club head without sound tuning features illustrating the topography of a vibration mode
  • FIG. 5 is another top schematic view of a golf club head of FIG. 4 including sound tuning features illustrating the altered topography of the vibration mode;
  • FIG. 6 is a cross-sectional view of the golf club head of FIG. 1 ;
  • FIG. 7 is a detail view of the crown portion of the golf club head corresponding to Detail I of FIG. 6 ;
  • FIG. 8 is another detail view of the crown portion of the golf club head corresponding to Detail II of FIG. 6 ;
  • FIG. 9 is a detail view of the sole portion of the golf club head corresponding to Detail III of FIG. 6 .
  • the present invention is directed to a golf club head including sound tuning features.
  • the sound tuning features are included to tailor the sound produced by the golf club head to any desired frequency, amplitude and/or duration.
  • Every golf club produces a distinct sound and feel when it is used to strike a golf ball.
  • the sound and feel are produced by the vibration behavior of the golf club head which is a result of the design of the golf club head.
  • Golf club head designs are analyzed and samples are tested to characterize the vibration characteristics of a particular design in an attempt to determine whether the sound and feel produced by the golf club head will be acceptable to the average golfer.
  • the frequency values and displacement shapes are determined for the various vibration modes of the club head. It is generally understood that the lower frequency modes, especially those at frequencies below about 3500 Hz, have a tendency to detrimentally affect the sound and feel of a particular golf club head.
  • Golf club head 10 generally includes a crown portion 12 , a heel portion 14 , a toe portion 16 , a rear portion 18 , a front portion 20 , a hosel 22 and a sole portion 24 that combine to form a generally hollow body having an interior cavity.
  • Front portion 20 includes a striking face 21 for impacting a golf ball.
  • Crown portion 12 extends rearward from front portion 20 and forms a top surface of club head 10 .
  • Heel portion 14 and toe portion 16 form sidewalls of club head 10 and extend generally downward from the edges of crown portion 12 and rearward from side edges of front portion 20 .
  • Rear portion 18 extends between heel portion 14 and toe portion 16 to complete the side wall of club head 10 .
  • Sole portion 24 extends between the lower edges of front portion 20 , heel portion 14 , toe portion 16 and rear portion 18 and generally forms the bottom surface of club head 10 .
  • Golf club head 10 includes structural features that tune the sound of the golf club head by manipulating the frequency and displacement shape of the vibration modes. Generally, vibration mode frequencies of less than about 3500 Hz are undesirable, so it is desirable to include such structural features so that the first vibration mode is at a frequency greater than about 3500 Hz.
  • golf club head 10 includes sound tuning features that both manipulate the vibration modes of the club head while advantageously manipulating the mass of the club head. For example, and as will be discussed in greater detail below, features that add and remove mass from discrete areas of the club head are employed to alter the vibration behavior of the golf club head. The mass is manipulated at areas at or adjacent one or more hot spots in the vibration mode.
  • hot spots are localized areas of the structure that exhibit increased displacement at the frequency of the vibration mode. For each vibration mode there is generally a primary hot spot that exhibits maximum displacement over the structure for that vibration mode. Some vibration modes also exhibit secondary and/or tertiary hot spots that exhibit local maximum displacement, but with a displacement magnitude that is less than that of the primary hot spot.
  • a golf club having generally constant thickness crown and sole portions was analyzed using finite element analysis (FEA) and the lowest frequency vibration mode (i.e., first mode) was determined to be as illustrated in FIG. 2 .
  • the modeled golf club head exhibited a first mode having a frequency of about 2946 Hz.
  • the location of maximum displacement of that vibration mode i.e., the primary hot spot, was determined to be on the sole of the club head, generally at location A.
  • a secondary hot spot was determined to also be on the sole, toward toe portion 16 , generally at location B. Because the vibration mode included maximum displacement on the sole and because it is generally desired to lower the center of gravity of the golf club head, sound tuning features that add mass were added to sole portion 24 of golf club head 10 .
  • Truss system 25 was added to sole portion 24 .
  • Truss system 25 includes a first rib 26 and a second rib 28 .
  • First rib 26 extends generally across club head 10 in a heel to toe direction.
  • Second rib 28 is generally located adjacent toe portion 16 of club head 10 and extends from first rib 26 generally toward the intersection of toe portion 16 and front portion 20 .
  • First and second ribs 26 , 28 were oriented so that they pass through locations on sole portion 24 that are adjacent the primary and secondary hot spots of the analytical vibration mode of FIG. 2 .
  • first rib 26 extends through a location on sole portion 24 that exhibits a displacement having a magnitude that is at least 75% of the maximum displacement of the primary hot spot. More preferably, first rib 26 extends through a location near the primary hot spot that exhibits a displacement having a magnitude that is at least 85% of the maximum displacement for that hot spot.
  • Second rib 28 similarly extends through a location of sole portion 24 that exhibits a high relative displacement for the locale. In particular, second rib 28 extends through a location that exhibits a displacement magnitude that is at least 75%, more preferably 85%, of the maximum displacement of the secondary hot spot.
  • truss system 25 increased the frequency of the first mode of the analytical model to about 3310 Hz, while only incrementally changing the displacement profile of the vibration mode, as shown in FIG. 3 . Because, even with the addition of truss system 25 , the club head exhibited a first mode frequency still below about 3500 Hz., the thickness of sole portion 24 was increased universally by 0.05 mm. However, that change in thickness increased the frequency of that vibration mode only incrementally.
  • the thickness of an area of sole portion 24 was reduced and provided the unexpected result of significantly increasing the frequency of the vibration mode.
  • the reduced thickness area 30 was sized and located so that an edge of area 30 was located adjacent the primary and secondary hot spots, as illustrated in FIG. 3 .
  • area 30 has a thickness that is approximately 0.05 mm thinner than the surrounding area of sole portion 24 .
  • the edge of area 30 extends through locations adjacent the sole hot spots that exhibit at least 75%, more preferably 85%, of the maximum displacement of the nearest hot spot. It should be appreciated that a plurality of reduced thickness areas may be incorporated that are oriented so that an edge is located adjacent a single or multiple hot spots.
  • a reduced thickness area 32 was incorporated into crown portion 12 , as illustrated in FIG. 5 .
  • Area 32 was sized and located so that an edge of area 32 was located adjacent the primary hot spot of analytical vibration mode.
  • the edge of area 32 extends through a location adjacent the crown hot spot that exhibits at least 75%, more preferably 85%, of the maximum displacement of the hot spot.
  • the frequency of the vibration mode was increased to about 3422 Hz and incrementally altered the displacement shape of the vibration mode.
  • the crown thickness was increased in both area 32 and the peripheral area 34 by about 0.10 mm. As a result, the frequency of the vibration mode was increased to about 3500 Hz.
  • At least portions of the sound tuning features are positioned adjacent hot spots of the analytical vibration modes so that they have a significant impact on the local vibration behavior.
  • the sound tuning features are preferably located based on vibrational displacement values of analytical models of the club head lacking the features. It should be appreciated, however, that alternatively, the sound tuning features may be positioned so that they are located within a distance of a location exhibiting maximum displacement regardless of the relative magnitude of the displacement. For example, the sound tuning features extend through a location that is at least within 15 mm of the nearest hot spot, or more preferably within 10 mm. Additionally, the reduced thickness portions of crown portion 12 and sole portion 24 may have any shape.
  • the tuning features include mass increasing features, such as truss system 25 , and mass reducing features, such as reduced thickness areas 30 and 32 .
  • truss system 25 includes interconnected ribs 26 , 28 .
  • First rib 26 generally extends across club head 10 in a heel to toe direction and is located rearward and below a center of gravity of the golf club head when the club head is in an address position.
  • First rib 26 has a length generally between about 90 mm and about 120 mm, a thickness between about 0.125 mm and about 1.50 mm, and a maximum height in a sole to crown direction of between about 0.25 mm and about 15 mm.
  • Second rib 28 is located generally adjacent toe portion 16 and extends from first rib 26 generally toe-ward and forward.
  • Second rib 28 has a length generally between about 30 mm and about 60 mm, a thickness between about 0.125 mm and about 1.50 mm, and a maximum height in a sole to crown direction of between about 0.25 mm and about 15 mm.
  • the truss system may include any number of ribs or pads that are interconnected or discrete components and the features may be constructed as integral cast or forged features or constructed separately and coupled to the club head. It should further be appreciated that the thicknesses of the features forming the truss system are greater than the thick and reduced thickness portions of the crown and sole portions.
  • the edges of area 30 and area 32 are configured to provide a relatively drastic change in thickness over a short distance. That configuration provides a stepped interface between the adjacent regions of thickness that extends generally through the hot spots.
  • area 30 has a thickness that is reduced in comparison to the adjacent area of sole portion 24 .
  • sole portion 24 has a thickness of about 0.60 mm to about 1.00 mm and reduced thickness area 30 has a thickness that is about 85% to about 95% of the thickness of the remainder of sole portion 34 .
  • area 32 has a thickness of about 0.50 mm to about 0.95 mm.
  • a transition area 31 provides an interface between the thicker area of sole portion 24 and area 30 .
  • a length Xs of transition area 31 is preferably less than about 2.00 mm, and more preferably less than about 1.20 mm.
  • Transition area 31 may have any desired shape.
  • transition area 31 may have any cross-sectional shape, such as curved or linear, i.e., transition area may be generally radiused, as shown, or generally conical.
  • transition area 31 is radiused and the radius Rs is about 2.00 mm to about 4.00 mm. Additionally, it is preferable that radius Rs is configured so that it is tangent to the reduced thickness area 30 . It should be further appreciated that the transition area may be stepped rather than including a smooth transition between area 30 and the remainder of sole portion 24 .
  • area 32 has a thickness that is reduced in comparison to the adjacent peripheral area 34 .
  • peripheral area 34 has a thickness of about 0.60 mm to about 1.00 mm and reduced thickness area 32 has a thickness that is about 65% to about 80% of the thickness of peripheral area 34 , and more preferably area 32 has a thickness of about 70% to about 75% of the thickness of peripheral area 34 .
  • area 32 has a thickness of about 0.40 mm to about 0.80 mm.
  • a transition area 33 provides an interface between the thicker peripheral area 34 and area 32 .
  • a length Xc of transition area 33 is preferably less than about 2.00 mm, and more preferably less than about 1.20 mm.
  • Transition area 33 may have any desired shape.
  • transition area 33 may have any cross-sectional shape, such as curved or linear, i.e., transition area may be generally radiused, as shown, or generally conical.
  • transition area 33 is radiused and the radius Rc is about 2.00 mm to about 4.00 mm. Additionally, it is preferable that radius Rc is configured so that it is tangent to the reduced thickness area 32 . It should be further appreciated that the transition area may be stepped rather than including a smooth transition between area 32 and peripheral portion 34 .

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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)
US12/694,955 2010-01-27 2010-01-27 Golf club head with sound tuning Abandoned US20110183776A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US12/694,955 US20110183776A1 (en) 2010-01-27 2010-01-27 Golf club head with sound tuning
EP11000417A EP2353667A2 (de) 2010-01-27 2011-01-20 Golfschlägerkopf mit Toneinstellung
JP2011013011A JP2011152418A (ja) 2010-01-27 2011-01-25 打音チューニングを有するゴルフクラブヘッド
CN2011100324115A CN102151392A (zh) 2010-01-27 2011-01-27 具有声音调节的高尔夫球杆头

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Application Number Priority Date Filing Date Title
US12/694,955 US20110183776A1 (en) 2010-01-27 2010-01-27 Golf club head with sound tuning

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US20110183776A1 true US20110183776A1 (en) 2011-07-28

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US12/694,955 Abandoned US20110183776A1 (en) 2010-01-27 2010-01-27 Golf club head with sound tuning

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US (1) US20110183776A1 (de)
EP (1) EP2353667A2 (de)
JP (1) JP2011152418A (de)
CN (1) CN102151392A (de)

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JP2013000292A (ja) * 2011-06-15 2013-01-07 Bridgestone Sports Co Ltd ゴルフクラブヘッド
US10258843B2 (en) 2014-05-15 2019-04-16 Karsten Manufacturing Corporation Club heads having reinforced club head faces and related methods
US20190247724A1 (en) * 2018-02-09 2019-08-15 Sumitomo Rubber Industries, Ltd. Golf club head
US10688350B2 (en) 2014-10-24 2020-06-23 Karsten Manufacturing Corporation Golf club heads with energy storage characteristics
US10751587B2 (en) 2014-05-15 2020-08-25 Karsten Manufacturing Corporation Club heads having reinforced club head faces and related methods
US10888743B2 (en) 2014-10-24 2021-01-12 Karsten Manufacturing Corporation Golf club heads with energy storage characteristics
US20210038954A1 (en) * 2013-01-31 2021-02-11 Sumitomo Rubber Industries, Ltd. Golf club head and manufacturing method for same
US10918919B2 (en) 2014-05-15 2021-02-16 Karsten Manufacturing Corporation Club heads having reinforced club head faces and related methods
US11027177B2 (en) 2014-10-24 2021-06-08 Karsten Manufacturing Corporation Golf club heads with energy storage characteristics
US11130025B2 (en) 2014-10-24 2021-09-28 Karsten Manufacturing Corporation Golf club heads with energy storage features
US11185747B2 (en) 2014-10-24 2021-11-30 Karsten Manufacturing Corporation Golf club head with open back cavity
US11278772B2 (en) * 2014-10-24 2022-03-22 Karsten Manufacturing Corporation Golf club heads with energy storage characteristics
US11413508B2 (en) 2014-10-24 2022-08-16 Karsten Manufacturing Corporation Golf club heads with energy storage characteristics
US20230014268A1 (en) * 2014-10-24 2023-01-19 Karsten Manufacturing Corporation Golf club heads with energy storage characteristics
US11819740B2 (en) 2014-10-24 2023-11-21 Karsten Manufacturing Corporation Golf club heads with energy storage characteristics
US11925844B2 (en) 2020-09-24 2024-03-12 Karsten Manufacturing Corporation Multi-component golf club head with tuning element

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JP5886010B2 (ja) * 2011-11-21 2016-03-16 ブリヂストンスポーツ株式会社 ゴルフクラブヘッド
JP6181922B2 (ja) * 2012-12-03 2017-08-16 ダンロップスポーツ株式会社 ゴルフクラブヘッド
GB2567119B (en) * 2016-07-26 2021-12-29 Karsten Mfg Corp Golf club heads with ribs and related methods

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