WO1998031433A1 - Inertially tailored golf club heads - Google Patents

Inertially tailored golf club heads Download PDF

Info

Publication number
WO1998031433A1
WO1998031433A1 PCT/US1998/001205 US9801205W WO9831433A1 WO 1998031433 A1 WO1998031433 A1 WO 1998031433A1 US 9801205 W US9801205 W US 9801205W WO 9831433 A1 WO9831433 A1 WO 9831433A1
Authority
WO
WIPO (PCT)
Prior art keywords
golf club
club head
article
inertia
face
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.)
Ceased
Application number
PCT/US1998/001205
Other languages
English (en)
French (fr)
Other versions
WO1998031433A9 (en
Inventor
John B. Kosmatka
Richard C. Helmstetter
Thomas R. Hilton
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.)
Topgolf Callaway Brands Corp
Original Assignee
Callaway Golf Co
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 Callaway Golf Co filed Critical Callaway Golf Co
Priority to JP53470598A priority Critical patent/JP2001508687A/ja
Priority to AU62466/98A priority patent/AU6246698A/en
Publication of WO1998031433A1 publication Critical patent/WO1998031433A1/en
Publication of WO1998031433A9 publication Critical patent/WO1998031433A9/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • A63B53/005—Club sets
    • 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
    • A63B53/047—Heads iron-type
    • 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

Definitions

  • the field of the present invention is golf club heads and, more particularly, inertially tailored golf club heads and methods of designing the same.
  • the present invention is directed toward a method of designing a golf club head that takes into consideration the entire inertia tensor of the golf club head, thus allowing coupled dynamic responses during a swing motion to be minimized.
  • the inertia tensor of a golf club head is defined using the magnitude and direction of the principal moments of inertia (i.e., the magnitude and direction of the maximum moment of inertia, the minimum moment of inertia, and an intermediate moment of inertia) of the golf club head.
  • a preferred location of a center of gravity (CG) of a golf club head may be selected, magnitudes and directions of the principal moments of inertia of the golf club head may be selected, and mass may be distributed within the golf club head such that the center of gravity of the golf club head is located at the selected location, and such that the principal moments of inertia of the golf club head have the selected magnitudes and directions .
  • CG center of gravity
  • the axes of the principal moments of inertia define a unique coordinate frame, wherein the inertia properties of the golf club head are completely uncoupled (i.e., wherein all products of inertia are 0), and wherein the moment of inertia about a first principal axis corresponds to the absolute maximum body inertia, the moment of inertia about a second principal axis corresponds to the absolute minimum body inertia, and the moment of inertia about a third axis is an intermediate value.
  • the present invention is directed toward methods of improving golf club head performance by tailoring the mass distribution of a golf club head in a fashion that will minimize coupled dynamic club head motion as the golf club head progresses, for example, through the motion of a swing.
  • the inertia force is a swing-produced dynamic force that is tangent to the swing path of the center of gravity of a golf club head.
  • one of the principal axes of inertia may point in a ball impact direction or in the direction of the inertia force at the moment of ball impact (i.e., may be located in a horizontal plane and be perpendicular to a line defined by the intersection of a plane of the face and the horizontal plane)
  • another principal axis of inertia may be perpendicular to the first and point in the direction of the centrifugal force that is produced during the swing motion.
  • the principal axis of inertia associated with that force be oriented in a direction ranging from vertical to a direction coincident with the lie angle of the golf club head.
  • the final principal axis of inertia is preferably perpendicular to the other two principal axes of inertia and generally may be oriented within the plane of the face of the golf club head and in a near horizontal direction.
  • the present invention is directed toward a method of directly controlling the dynamic behavior of a golf club head by adjusting the magnitudes and directions of the principal moments of inertia of the golf club head.
  • the effective sweet spot region of a golf club head may be increased by increasing the moment of inertia about a principal axis that passes through the center of gravity of the golf club head and is oriented, for example, in a vertical direction; the resistance to changes in the dynamic loft of the golf club head upon ball impact may be increased by increasing the moment of inertia about a principal axis oriented, for example, along a line defined by an intersection of a horizontal plane and a face plane of the golf club head; and an overall club toe-down effect may be altered by changing the moment of inertia about a principal axis oriented, for example, in a horizontal plane and pointing in a direction of ball impact.
  • a golf club head for an iron golf club may have a principal axis of inertia that is oriented such that an inertia loft angle ( ⁇ i nert ia) of the golf club head is less than the geometric loft angle ( ⁇ GL ) of the golf club head.
  • a golf club head may have at least one principal axis of inertia that is aligned with a direction of a force that acts upon the golf club head when the golf club head impacts a golf ball.
  • the golf club head may also have a principal axis of inertia that is aligned with a direction of a centrifugal force that acts upon the golf club head as the golf club head travels through a swing motion.
  • a golf club head in accordance with the present invention may have a principal axis of inertia that forms an acute angle with a plane of the face of the golf club head in the direction of the face/sole interface of the golf club head. Accordingly, it is an object of the present invention to provide improved methods for designing golf club heads .
  • CG center of gravity
  • FIG. 1(a) is a toe-side view looking at the toe of a conventional iron or wedge type golf club head.
  • Fig. 1(b) is a front view looking at the face of the conventional iron or wedge type golf club head shown in Fig. 1(a).
  • Fig. 1(c) is a top view of the conventional iron or wedge type golf club head shown in Figs. 1(a) and 1(b) .
  • Fig. 2(a) is a toe-side view of a conventional metal wood golf club head.
  • Fig. 2(b) is a front view looking at the face of the conventional metal wood golf club head shown in Fig. 2(a) .
  • Fig. 2(c) is a top view of the conventional metal wood golf club head shown in Figs. 2(a) and 2(b) .
  • Fig. 3(a) is a toe-side view of a conventional wedge or iron type golf club head showing a nominal center of gravity (CG) location and the principal inertia axes of the golf club head.
  • CG center of gravity
  • Fig. 3(b) is a front view of the conventional wedge or iron type golf club head shown in Fig. 3(a) .
  • Fig. 3(c) is a top view of the conventional wedge or iron type golf club head shown in Figs. 3(a) and 3(b) .
  • Fig. 4(a) is a toe-side view of the conventional metal wood golf club head showing a nominal center of gravity (CG) location and the principal inertia axes of the golf club head.
  • Fig. 4(b) is a front view of the conventional metal wood golf club head shown in Fig. 4(a) .
  • Fig. 4(c) is a top view of the conventional metal wood golf club head shown in Figs. 4(a) and 4(b).
  • Fig. 5(a) is a toe-side view of a wedge or iron type golf club head in accordance with the present invention showing a nominal center of gravity (CG) location and preferred principal inertia axes of the golf club head.
  • Fig. 5(b) is a front view of the wedge or iron type golf club head shown in Fig. 5(a).
  • Fig. 5(c) is a top view of the wedge or iron type golf club head shown in Figs. 5(a) and 5(b).
  • Fig. 6(a) is a toe-side view of a metal wood golf club head in accordance with the present invention showing a nominal center of gravity (CG) location and preferred principal inertia axes of the golf club head.
  • CG center of gravity
  • Fig. 6(b) is a front view of the metal wood golf club head shown in Fig. 6(a) .
  • Fig. 6(c) is a top view of the metal wood golf club head shown in Figs. 6(a) and 6(b).
  • Fig. 7(a) is a toe-side view of an wedge or iron type golf club head showing regions with added mass concentrations in accordance with the present invention.
  • Fig. 7(b) is a front view of the wedge or iron type golf club head shown in Fig. 7(a).
  • Fig. 7(c) is a top view of the wedge or iron type golf club head shown in Figs. 7(a) and 7(b).
  • Fig. 8(a) is a toe-side view of a metal wood golf club head showing regions with added mass concentrations in accordance with the present invention.
  • Fig. 8(b) is a front view of the metal wood golf club head shown in Fig. 8(a).
  • Fig. 8(c) is a top view of the metal wood golf club head shown in Figs. 8(a) and 8(b).
  • FIGs. 1(a) -1(c) and 2 (a) -2(c) provide an illustration of a typical golf club head 10 for an iron or wedge type golf club, and an illustration of a typical golf club head 20 for a metal wood type golf club. It will be understood that all illustrations and frames of reference used herein apply to a golf club head at proper ball address position.
  • the iron or wedge type golf club head 10 has a body 12, face 14 and hosel 16.
  • the hosel 16 has a central axis H A , and the face 14 of the club head 10 lies in a plane (X F -Y F ) .
  • the golf club head 10 also has a geometric loft angle ⁇ GL defined as the angle from vertical (X H ) to the face plane (X F -Y F ) , and a geo-metric lie angle 0 ⁇ ie defined as the angle from horizontal (Y H ) to the hosel central axis H A .
  • the metal wood club head 20 has a body 22, face 24 and hosel 26.
  • the hosel 26 has a central axis H A
  • the face 24 of the metal wood club head 20 has a center line C L located in a vertical plane (X H -Z H ) .
  • the metal wood club head 20 also has a geometric loft angle ⁇ G r which is defined as the angle from vertical (X H ) to a line X F parallel to the center line C L , and a geometric lie angle ⁇ n e , which is defined as the angle from horizontal (Y H ) to the hosel central axis H A .
  • the inertia tensor of a golf club head is defined using the magnitude and direction of the principal moments of inertia (i.e., the magnitude and direction of the maximum moment of inertia, the minimum moment of inertia, and an inter-mediate moment of inertia) of the golf club head.
  • a preferred location of a center of gravity (CG) of a golf club head may be selected, preferred magnitudes and directions of the principal moments of inertia of the golf club head may be selected, and mass may be distributed within the golf club head such that the center of gravity of the golf club head is located at the preferred location, and such that the principal moments of inertia of the golf club head have the preferred magnitudes and directions.
  • the center of gravity of the golf club head may be located either at a preferred point within the golf club head or within a preferred region of the golf club head.
  • the axes of the principal moments of inertia define a unique coordinate frame, wherein the inertia properties of the golf club head are completely uncoupled (i.e., wherein all products of inertia are 0), and wherein the moment of inertia about a first principal axis corresponds to the absolute maximum body inertia, the moment of inertia about a second principal axis corresponds to the absolute minimum body inertia, and the moment of inertia about a third axis is an intermediate value.
  • a golf club head may be designed such that the principal axes of inertia of the golf club head point in directions that closely align with the directions of the primary forces that are applied to the club head during a typical swing.
  • These primary forces include the ball impact force, aerodynamic drag force and swing-produced centrifugal and inertia forces described above.
  • the third principal axis PA 3 (corresponding to the maximum inertia direction) is perpendicular to the first two principal axes PA X and PA 2 and is tilted upward in relation to the face plane (X F -Y F ) .
  • the inertia loft angle ⁇ i nert ia defined as angle from vertical to a plane defined by the first and second principal axes PAi and PA 2 , was always greater than the geometric loft ⁇ GL of the club face 14. This occurs because in those golf club heads that have been tested to date mass is not concentrated to a sufficient degree in the lower rearward section 13 of the body 12 the golf club heads 10 or in the upper front section 15 of the hosel 16 of the golf club heads 10.
  • the orientations of the principal axes of inertia PAi, PA 2 , and PA 3 of the conventional iron or wedge type golf club heads 10 that have been tested to date are (1) defined predominantly by the geometric loft angle ⁇ GL of the club heads 10 and (2) significantly rotated from the preferred club head vertical (X H ) and horizontal (Z H ) axes.
  • Figs. 4 (a) -4(c) it has been experimentally observed in test cases of commercially available metal wood club heads 20 that one of the principal axes of inertia PAi, which corresponds to the direction of maximum inertia, lies in a near vertical plane (PA ⁇ PA 2 ) and has a slightly rearward tilt associated with the geometric loft angle ⁇ GL of the club heads 20.
  • the other two principal axes PA 2 and PA 3 have been found to lie in a near horizontal plane, where one of the axes PA 3 (corresponding to the minimum inertia direction) extends through the center of gravity (CG) of the club head 20 in the direction of the hosel region 26 of the club head 20, and the other axis PA 2
  • the principal axes of inertia PAi, PA 2 , and PA 3 of golf club heads 30 and 40 designed in accordance with the present invention are preferably aligned with the directions of the primary forces (ball impact, aerodynamic drag, inertia and centrifugal) that act upon the club heads 30 and 40 during a typical swing motion or, alternatively, with the global axes (X H , Y H , Z H ) of the club heads 30 and 40.
  • one of the principal axes PA 3 will preferably point in the direction of the inertia force or a force that is exerted upon the club head 30 or 40 when a ball impacts upon the face 34 or 44 of the club head 30 or 40 during a typical swing.
  • This direction is denoted as direction Z H within the drawings (i.e., the principal axis PA 3 lies in a horizontal plane and is parallel to the global coordinate axis Z H ) .
  • Another principal axis of inertia PAi is preferably perpendicular to the principal axis PA 3 and points in the direction of the centrifugal force that is exerted upon the club head 30 or 40 during a typical swing motion.
  • the orientation of the principal axis PAi will generally range from vertical to a direction parallel to the hosel axis H A of the club head 30 or 40.
  • the remaining principal axis PA 2 will be oriented in an orthogonal fashion with the other two principal axes PAi and PA 3 .
  • one of the principal axes of inertia may be oriented such that it forms an acute angle ⁇ PA with the club face plane (X F -Y F ) .
  • the acute angle ⁇ PA is referred to herein as the principal face angle.
  • An exemplary set of principal face angles for a typical set of golf club heads numbered 1 through SW is set forth, along with exemplary geometric loft angles, in the table below.
  • the effective sweet spot region of a golf club head 30 or 40 may be increased by increasing the moment of inertia about the principal axis PAi; the resistance to changes in the dynamic loft of the golf club head 30 or 40 upon ball impact may be increased by increasing the moment of inertia about the principal axis PA 2 ; and an overall club toe-down effect may be altered by changing the moment of inertia about principal axis PA 3 .
  • the maximum moment of inertia be associated with the principal axis PAi to provide maximum resistance to club face opening or closing as a result of toe/heel mishits, and that the intermediate and minimum moments of inertia be associated with principal axes PA 2 and PA 3 .
  • the association of the intermediate and minimum moments of inertia with the principal axes PA 2 and PA 3 may vary with the design goals for a given golf club.
  • a large intermediate inertia may be preferred in the direction of principal axis PA 2 where it is desired to minimize head loft changes resulting from tee shots hit high or low on the face of the club head or, alter-natively, a large intermediate moment of inertia may be preferred in the direction of principal axis PA 3 where it is desired to resist club head toe-down effects.
  • the area of preferred mass concentration is identified as 33 in Fig.
  • hosel region 46 For metal wood club heads 40, it is presently preferred to minimize the amount of mass located within the hosel region 46, to concentrate the mass of the golf club head 40 toward the toe/sole interface 41 near the club face 44, to concentrate the mass of the golf club head 40 in the heel/sole region 47 of the body 42 of the club head 40, and/or to concentrate the mass of the golf club head 40 in the sole region 43.
  • a golf club head 30 or 40 it is presently preferred to use materials having substantially different densities to form distinct regions within the golf club head.
  • a substantial portion of the golf club head 30 from, for example, titanium (or some other lightweight material) and to form the regions of concentrated mass 33, 37, 41, 43 and 47 (shown in Figs. 7 (a) -(c) and 8 (a) -(c)) from a different substantially heavier material, for example, tungsten.
  • inertially tailored individual golf clubs and golf club heads it is possible to provide not only inertially tailored individual golf clubs and golf club heads, but also an inertially tailored set of golf clubs.

Landscapes

  • 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)
PCT/US1998/001205 1997-01-22 1998-01-21 Inertially tailored golf club heads Ceased WO1998031433A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP53470598A JP2001508687A (ja) 1997-01-22 1998-01-21 慣性を考慮して製造されたゴルフクラブヘッド
AU62466/98A AU6246698A (en) 1997-01-22 1998-01-21 Inertially tailored golf club heads

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/792,957 1997-01-22
US08/792,957 US6045455A (en) 1997-01-22 1997-01-22 Inertially tailored golf club heads

Publications (2)

Publication Number Publication Date
WO1998031433A1 true WO1998031433A1 (en) 1998-07-23
WO1998031433A9 WO1998031433A9 (en) 1998-12-10

Family

ID=25158615

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/001205 Ceased WO1998031433A1 (en) 1997-01-22 1998-01-21 Inertially tailored golf club heads

Country Status (4)

Country Link
US (1) US6045455A (enExample)
JP (1) JP2001508687A (enExample)
AU (1) AU6246698A (enExample)
WO (1) WO1998031433A1 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1082976A4 (en) * 1999-04-05 2001-04-25 Mizuno Kk GOLF CLUB HEAD, IRON GOLF CLUB HEAD, WOODEN GOLF CLUB HEAD AND GOLF CLUB GAME
US7415866B2 (en) 2006-02-14 2008-08-26 Mondher Latiri Device for determining the center of gravity of an object

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6669580B1 (en) * 1997-10-23 2003-12-30 Callaway Golf Company Golf club head that optimizes products of inertia
JP2002248182A (ja) * 2001-02-26 2002-09-03 Yokohama Rubber Co Ltd:The ゴルフクラブヘッド
US6991558B2 (en) * 2001-03-29 2006-01-31 Taylor Made Golf Co., Lnc. Golf club head
US6719641B2 (en) 2002-04-26 2004-04-13 Nicklaus Golf Equipment Company Golf iron having a customizable weighting feature
US6769998B2 (en) * 2002-09-20 2004-08-03 Callaway Golf Company Iron golf club head
US6814674B2 (en) * 2002-09-20 2004-11-09 Callaway Golf Company Iron golf club
US20040055696A1 (en) * 2002-09-20 2004-03-25 Callaway Golf Company Method for manufacturing an iron golf club head
US6983637B2 (en) * 2003-07-14 2006-01-10 Steven Manuel Nesbit Apparatus and method for evaluating and comparing golf club head designs based upon mass properties and impact behavior
USD505466S1 (en) 2004-05-11 2005-05-24 Callaway Golf Company Iron golf club head
US7083531B2 (en) * 2004-07-29 2006-08-01 Callaway Golf Company Iron-type golf club
US7258625B2 (en) 2004-09-08 2007-08-21 Nike, Inc. Golf clubs and golf club heads
USD518539S1 (en) 2004-11-01 2006-04-04 Callaway Golf Company Iron golf club head
US8491414B2 (en) * 2009-05-29 2013-07-23 Acushnet Company Wedge type golf club head
US8187120B2 (en) * 2009-05-29 2012-05-29 Acushnet Company Wedge type golf club head
US8579729B2 (en) 2009-05-29 2013-11-12 Acushnet Company Wedge type golf club head
US9713751B2 (en) 2009-05-29 2017-07-25 Acushnet Company Wedge type golf club head
US8105180B1 (en) 2009-07-10 2012-01-31 Callaway Golf Company Iron-type golf club head with groove profile in ceramic face
US8282506B1 (en) 2009-09-18 2012-10-09 Callaway Golf Company Iron-type golf club head with rear cavity with undercut
US8197355B2 (en) * 2009-09-25 2012-06-12 Callaway Golf Company Iron-type golf club head with chamfered leading edge
US8468679B2 (en) * 2009-10-23 2013-06-25 Callaway Golf Company Method of manufacture to control scoreline profile
US20110111883A1 (en) * 2009-11-12 2011-05-12 Callaway Golf Company Golf club head with grooves
US20110172026A1 (en) * 2010-01-14 2011-07-14 Callaway Golf Company Metal injection molded grooved face insert
US11065513B2 (en) * 2011-11-28 2021-07-20 Acushnet Company Set of golf club heads and method of manufacture
USD773574S1 (en) 2015-02-12 2016-12-06 Acushnet Company Wedge golf club set
USD762792S1 (en) 2015-02-12 2016-08-02 Acushnet Company Wedge golf club head
USD829837S1 (en) 2017-03-01 2018-10-02 Acushnet Company Wedge golf club

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4854581A (en) * 1987-06-24 1989-08-08 Macgregor Golf Company Golf irons
US5306008A (en) * 1992-09-04 1994-04-26 Frank Kinoshita Momentum transfer golf club
US5429357A (en) * 1992-05-01 1995-07-04 Kabushiki Kaisha Endo Seisakusho Golf clubhead and its method of manufacturing
US5447309A (en) * 1992-06-12 1995-09-05 Taylor Made Golf Company, Inc. Golf club head
US5628698A (en) * 1994-07-14 1997-05-13 Sumitomo Rubber Industries, Ltd. Iron club head

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2231847A (en) * 1938-05-31 1941-02-11 Spalding A G & Bros Inc Golf club
US3703824A (en) * 1970-05-11 1972-11-28 Dunlop Co Ltd Apparatus for comparing moments of inertia of golf clubs
US3941390A (en) * 1970-10-23 1976-03-02 Douglas Hussey Heel and toe weighted golf club head
US4420156A (en) * 1982-03-22 1983-12-13 Pepsico, Inc. Iron-type golf clubs
US4802672A (en) * 1987-06-24 1989-02-07 Macgregor Golf Company Set of golf irons
GB8717964D0 (en) * 1987-07-29 1987-09-03 Nottingham University Of Sporting equipment
US4887815A (en) * 1987-10-09 1989-12-19 Hughes James W Low swing weight golf club set
US5131986A (en) * 1989-12-01 1992-07-21 Yamaha Corporation Golf club head and its manufacturing
US5046733A (en) * 1989-12-04 1991-09-10 Antonious A J Iron type golf club head with improved perimeter weight configuration
US5018382A (en) * 1990-03-05 1991-05-28 Kelley James W Apparatus for measurement and calculation of moment of inertia
JP2719695B2 (ja) * 1991-08-31 1998-02-25 マルマンゴルフ株式会社 慣性主軸方向に重量配分させたゴルフクラブヘッド
US5616086A (en) * 1992-10-22 1997-04-01 Dunlop Maxfli Sports Corporation Golf club set
US5318296A (en) * 1992-11-12 1994-06-07 Adams Golf Inc. Matched sets for golf clubs having maximum effective moment of inertia
US5351953A (en) * 1993-03-18 1994-10-04 Mase George T Dynamically matched set of golf clubs and method and apparatus for designing the same using the inertia tensor
US5309753A (en) * 1993-04-08 1994-05-10 U.S. Golf Association Apparatus and method for determining the inertia matrix of a rigid body
US5335914B1 (en) * 1993-04-13 1999-07-13 Arnold Palmer Golf Company Golf club head
US5366223A (en) * 1993-10-28 1994-11-22 Frank D. Werner Golf club face for drivers
US5528927A (en) * 1994-12-12 1996-06-25 Emhart Inc. Center of gravity locator
US5584770A (en) * 1995-02-06 1996-12-17 Jensen; Morten A. Perimeter weighted golf club head
JP3063967B2 (ja) * 1995-09-25 2000-07-12 住友ゴム工業株式会社 ゴルフクラブヘッド

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4854581A (en) * 1987-06-24 1989-08-08 Macgregor Golf Company Golf irons
US5429357A (en) * 1992-05-01 1995-07-04 Kabushiki Kaisha Endo Seisakusho Golf clubhead and its method of manufacturing
US5447309A (en) * 1992-06-12 1995-09-05 Taylor Made Golf Company, Inc. Golf club head
US5306008A (en) * 1992-09-04 1994-04-26 Frank Kinoshita Momentum transfer golf club
US5628698A (en) * 1994-07-14 1997-05-13 Sumitomo Rubber Industries, Ltd. Iron club head

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1082976A4 (en) * 1999-04-05 2001-04-25 Mizuno Kk GOLF CLUB HEAD, IRON GOLF CLUB HEAD, WOODEN GOLF CLUB HEAD AND GOLF CLUB GAME
US7415866B2 (en) 2006-02-14 2008-08-26 Mondher Latiri Device for determining the center of gravity of an object

Also Published As

Publication number Publication date
JP2001508687A (ja) 2001-07-03
US6045455A (en) 2000-04-04
AU6246698A (en) 1998-08-07

Similar Documents

Publication Publication Date Title
US6045455A (en) Inertially tailored golf club heads
US6186905B1 (en) Methods for designing golf club heads
WO1998031433A9 (en) Inertially tailored golf club heads
US5803830A (en) Optimum dynamic impact golf clubs
US6190267B1 (en) Golf club head controlling golf ball movement
EP1082976B1 (en) Golf club head, iron golf club head, wood golf club head, and golf club set
US5836830A (en) Golf club head
US9144717B2 (en) Putter heads and putters
CA2246965C (en) Self-aligning, minimal self-torque golf clubs
EP2504067B1 (en) Golf club with a reinforcing structure
US8608585B2 (en) Golf club head or other ball striking device having a reinforced or localized stiffened face portion
EP2414052B1 (en) Golf clubs and golf club heads
US4653756A (en) Golf club iron
EP2889061B1 (en) Iron-type golf clubs and golf club heads
US20110275446A1 (en) Wood-type golf clubs with tubing and weights
CA2086742A1 (en) Golf club
JPH03224579A (ja) 非常にバランスのとれた高い慣性モーメントのゴルフパター
US6093115A (en) Golf club head with a ball striking face having a directional tendency
US20020128088A1 (en) Method and apparatus for increasing hitting efficacy in a sporting implement
JP3933612B2 (ja) ゴルフパター用ヘッド
JP2004290565A (ja) パター用ゴルフクラブヘッドおよびパター用ゴルフクラブ
JPH0557034A (ja) 慣性主軸方向に重量配分させたゴルフクラブヘツド
JP2002315852A (ja) ゴルフクラブヘッド
JP2001161866A (ja) ゴルフクラブヘッド
JPH07236714A (ja) ゴルフクラブセット

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM GW HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

COP Corrected version of pamphlet

Free format text: PAGES 1/8-8/8, DRAWINGS, REPLACED BY NEW PAGES 1/8-8/8; DUE TO LATE TRANSMITTAL BY THE RECEIVING OFFICE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref country code: JP

Ref document number: 1998 534705

Kind code of ref document: A

Format of ref document f/p: F

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase