US20040043825A1 - Golf club shaft set - Google Patents
Golf club shaft set Download PDFInfo
- Publication number
- US20040043825A1 US20040043825A1 US10/228,392 US22839202A US2004043825A1 US 20040043825 A1 US20040043825 A1 US 20040043825A1 US 22839202 A US22839202 A US 22839202A US 2004043825 A1 US2004043825 A1 US 2004043825A1
- Authority
- US
- United States
- Prior art keywords
- shafts
- length
- tip section
- shaft
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/10—Non-metallic shafts
-
- 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
- A63B53/12—Metallic shafts
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/005—Club sets
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Golf Clubs (AREA)
Abstract
Description
- The present invention relates to golf club shaft sets, and more particularly, to a golf club shaft set including shafts with composite first ends and metal second ends wherein the length of the metal tip end is inversely proportional to the overall length of the shaft.
- Two types of shafts dominate the golf club shaft market. The first type of shaft is made entirely of metal such as high strength alloy steel. The second type of shaft is made entirely of a composite such as graphite.
- Metal shafts are generally regarded as being relatively heavy but provide high torsional stiffness. This results in a playability which yields accurate ball control and good feel but may limit club head speed and hence distance. It can also be made difficult to obtain a high tip flexibility with metal shafts compared to composite shafts which can compromise ball trajectory.
- Composite shafts are generally regarded as being relatively light with more flexible tips which can result in a playability which yields higher club head speed and more distance as well as a higher ball trajectory. However, because composite shafts are not torsionally very stiff, composite shafts are also regarded as being somewhat limited in terms of accurate ball control and feel.
- To take advantage of the separate benefits of metal and composite shafts while minimizing their deficiencies, a multiple material golf club shaft has recently been introduced to the market. A multiple material shaft is made partially of metal and partially of composite. In other words, a first portion of the shaft is formed of metal, a second portion of the shaft is made of composite, and the two portions are coupled together.
- Multiple material shafts are generally regarded as being both lightweight and resistant to torque. This enables the generation of more club head speed than an all metal shaft and more accuracy than an all composite shaft. Nonetheless, it is still desirable to balance the need for distance and accuracy against one another across the entire multiple material shaft set.
- For example, lighter and more tip flexible shafts are desirable in the long irons to provide more distance and higher ball trajectory at the expense of a certain degree of accuracy. In contrast, heavier and more torsionally stiff shafts are desirable in the short irons to provide more accuracy and feel at the expense of a certain amount of distance. Medium weight shafts with intermediate torsional stiffness are desirable in the middle irons to provide a compromise between distance and accuracy.
- In view of the foregoing, it would be desirable to provide a multiple material golf club set specifically tailored to provide high club head speed in the long irons, high torsional stiffness in the low irons, and a compromise between the two in the middle irons.
- A set of golf club shafts is provided including a plurality of shafts progressively increasing in length. Each shaft includes a butt section formed of a first material coupled to a tip section formed of a second, different material. Preferably, the tip section comprises metal while the butt section comprises composite. The length of each tip section is inversely proportional to the overall length of the shaft. As such, the tip sections progressively decrease in length as the plurality of shafts progressively increase in length. The relationship of tip length to butt length or overall length is maintained both in absolute and relative terms. For example, each tip section preferably decreases in length by about 0.5 inch from one club shaft to the next. The length of the tip section of the shortest shaft may be about 30-34% of the entire length of the shaft whereas the length of the tip section of the longest one of the shafts may be about 18-20% of the entire length of the shaft.
- The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
- FIG. 1 is a side elevational view of a golf club shaft incorporating the teachings of the present invention;
- FIG. 2 is a cross-sectional view of a metal/composite joint of the golf club shaft of FIG. 1; and
- FIG. 3 is a side elevational view of a set of golf clubs incorporating the teachings of the present invention.
- The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
- The present invention is directed towards a set of golf club shafts wherein each shaft includes a composite butt section coupled to metal tip section. As each shaft of the set increases in length, the corresponding tip section decreases. This provides at least two advantages. First, because of the different specific gravities of composite material and metal, the longer metal tip maintains or even increases the weight of the shaft as the overall length decreases. Secondly, the increasing length of the metal tip provides more torsional stability as the shaft gets shorter.
- Referring to FIG. 1, there is shown a
golf club 10 having agrip 12, a head 14 and atubular shaft 16. Although theclub 10 is illustrated as a wood, it may also be an iron or a putter. Theshaft 16 includes atip section 18 and abutt section 20. Thetip section 18 is preferably formed of a metallic material such as high strength steel while thebutt section 20 is preferably formed of a composite material such as graphite. While theshaft 16 has been illustrated as having a smooth, tapered sidewall 22, it should be appreciated that a parallel or stepped sidewall could substitute therefore. - The
tip section 18 is secured at alower end 24 to head 14 by sizing it to fit standard club head hosel sockets. Theupper end 26 oftip section 18 is telescopically and slidingly fit over thelower end 28 of thebutt section 20. The physical characteristics of thetip section 18 from head 14 to thejoint 30 where it meets thebutt section 20, are designed to provide the desired balance of torsional stiffness, bending stiffness (flex), strength, and weight in order to yield the best playability when combined with the composite butt section. A preferred embodiment of such a joint 30 is described in U.S. patent application Ser. No. 09/745,001 filed Dec. 21, 2000 which is incorporated by reference herein in its entirety. - Turning now to FIG. 2, the joint30 of FIG. 1 is illustrated in greater detail. An important aspect affecting the durability of the
shaft 16 is the strength of thejoint 30 between themetal tip section 18 and thecomposite butt section 20. As can be seen, thetip section 18 is in the form of a hollow metal cylinder and thebutt section 20 is formed as a hollow composite cylinder. Thebutt section 20 includes a reduced diameter cylindrical portion or plug 32 for insertion into thetip section 18. The reduced diameter portion 32 may be formed during the lay-up of thecomposite butt section 20 or may be formed by grinding away a pre-selected annular amount of the butt material after initial formation. The reduced diameter portion 32 is dimensioned to ensure a sufficient overlap and durable interconnection with thetip section 18. - The
metal tip section 18 andcomposite butt section 20 are joined together with an adhesive, such asepoxy bond 31. The thickness of theadhesive 31 is carefully controlled and the surface area of thetip section 18 andbutt section 20 along theadhesive 31 is sufficient to ensure adequate strength. Bond strength is selected such that the joint 30 does not fail in shear from the torsional loads imposed through generally accepted levels of abuse while playing the game of golf. Limiting the maximum thickness of theadhesive 31 and increasing the surface area of thejoint 30 also maintains the highest straightness standard for the assembledshaft 16. - Turning now to FIG. 3, the set of golf clubs34 includes a 2-
iron 36, 3-iron 38, 4-iron 40, 5-iron 42, 6-iron 44, 7-iron 46, 8-iron 48, 9-iron 50, andwedge 52. The set may also include a gap wedge, sand wedge, and lob wedge in addition to other club types. For example, the golf club shaft set could also include a 1 iron and/or one or more woods. The overall length of each shaft increases from thewedge 52 through the 2-iron 36. For example, thewedge 52 may have an overall length of 36.5 inches whereas the 2-iron 36 may have an overall length of 40.5 inches. - Each club in the set34 preferably increases in length over the last consecutive shaft by about 0.5 inch. Conversely, each
steel tip section 18 progressively decreases in length as the overall length of the corresponding shaft increases. Accordingly, thesteel tip section 18 on the 40.5 inch 2-iron shaft 36 is about 7.5 inches. On the other hand, thesteel tip section 18 on the 36.5inch wedge shaft 52 is approximately 11.5 inches. This inverse relationship of tip length to shaft length continues throughout the shaft set 34 - In a preferred embodiment of the present invention, each
steel tip section 18 decreases in length by about 0.5 inch from the last consecutive tip section. To compensate for the decreasing length of the tip section 18 (and therefore maintain the desired overall length of the corresponding shaft), the length of thebutt section 20 progressively increases as the plurality of shafts progressively increase in length. As such, the tip sections are not only inversely proportional (in length) to the overall shaft length, but also to the butt section length. This is true both in absolute and relative terms. - For example, in the shortest shaft, i.e., the
wedge shaft 52, thetip section 18 accounts for approximately 30-33% of the entire length of the shaft. In contrast, in the longest shaft, i.e., the 2-iron 36, thetip section 18 accounts for about 17-19% of the entire length of the shaft. - The length of the
tip section 18 not only corresponds to the overall length of the shaft, but also to the loft of the club head 14. The plurality of club heads 14 in the golf club set 34 progressively decrease in loft from thewedge 52 to the 2-iron 36. Correspondingly, the length of eachtip section 18 progressively decreases as the loft of each club head 14 progressively decreases. In contrast to the inverse relationship described above with respect to club length, the relationship to loft is directly proportional. - While a full set of golf club shafts34 is illustrated in FIG. 3, it should be appreciated that the term set as used herein could comprise as little as two golf club shafts. The only requirement of the set is that the first shaft is longer than the second shaft. In such a set, the first shaft includes a tip section which is shorter than the tip section of the second shaft.
- The following table includes an exemplary set of golf clubs in a preferred set incorporating the teachings of the present invention:
Total Shaft Length Club Head Loft Tip Section Iron (inches) (degrees) Length 2 40-41 15-19 7.0-8.0 3 39.5-40.5 18-22 7.5-8.5 4 39-40 21-25 8-9 5 38.5-39.5 24-28 8.5-9.5 6 38-39 28-32 9-10 7 37.5-38.5 32-36 9.5-10.5 8 37-38 36-40 10-11 9 36.5-37.5 40-44 10.5-11.5 PW 36-37 44-48 11-12 GW 36-37 48-52 11-12 SW 36-37 53-57 11-12 LW 36-37 58-62 11-12 - The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
Claims (19)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/228,392 US20040043825A1 (en) | 2002-08-27 | 2002-08-27 | Golf club shaft set |
AU2003231604A AU2003231604A1 (en) | 2002-08-27 | 2003-08-01 | Golf club shaft set |
TW092122358A TWI224520B (en) | 2002-08-27 | 2003-08-14 | Golf club shaft set |
EP03018822A EP1393782A1 (en) | 2002-08-27 | 2003-08-19 | Golf club shaft set |
JP2003300364A JP2004081863A (en) | 2002-08-27 | 2003-08-25 | Golf club shaft set |
CA002438404A CA2438404A1 (en) | 2002-08-27 | 2003-08-27 | Golf club shaft set |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/228,392 US20040043825A1 (en) | 2002-08-27 | 2002-08-27 | Golf club shaft set |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040043825A1 true US20040043825A1 (en) | 2004-03-04 |
Family
ID=31495342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/228,392 Abandoned US20040043825A1 (en) | 2002-08-27 | 2002-08-27 | Golf club shaft set |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040043825A1 (en) |
EP (1) | EP1393782A1 (en) |
JP (1) | JP2004081863A (en) |
AU (1) | AU2003231604A1 (en) |
CA (1) | CA2438404A1 (en) |
TW (1) | TWI224520B (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060084520A1 (en) * | 2004-10-18 | 2006-04-20 | Balance-Certified Golf, Inc. | Shaft coupler |
US20060135282A1 (en) * | 2004-12-17 | 2006-06-22 | Integran Technologies, Inc. | Article comprising a fine-grained metallic material and a polymeric material |
US7771289B2 (en) | 2004-12-17 | 2010-08-10 | Integran Technologies, Inc. | Sports articles formed using nanostructured materials |
US8157669B2 (en) | 2009-06-15 | 2012-04-17 | Wilson Sporting Goods Co. | Multi-sectional co-cured golf shaft |
US20150021905A1 (en) * | 2004-09-28 | 2015-01-22 | Advanced Composite Products & Technology, Inc. | Composite drill pipe and method for forming same |
WO2016149210A1 (en) * | 2015-03-19 | 2016-09-22 | Karsten Manufacturing Corporation | Ascending weight iron shaft system |
US10213666B1 (en) * | 2018-01-31 | 2019-02-26 | Breakthrough Golf Technology Llc | Golf shaft |
US10342958B2 (en) | 2017-06-30 | 2019-07-09 | Abbott Cardiovascular Systems Inc. | System and method for correcting valve regurgitation |
US10857433B2 (en) | 2018-01-31 | 2020-12-08 | Breakthrough Golf Technology, Llc | Golf shaft system and golf shaft |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4563007A (en) * | 1980-03-13 | 1986-01-07 | Ti Accles & Pollock Limited | Golf club shafts |
US4836545A (en) * | 1988-11-07 | 1989-06-06 | Pompa J Benedict | Two piece metallic and composite golf shaft |
US5505446A (en) * | 1990-10-19 | 1996-04-09 | Whitaker; William T. | Variable flex shaft system for an array of golf clubs |
US5924936A (en) * | 1997-10-15 | 1999-07-20 | Penley Sports, L.L.C. | Individually matched set of club shafts and a method for manufacturing an individually matched set of club shafts |
US6203447B1 (en) * | 1999-12-07 | 2001-03-20 | True Temper Sports, Inc. | Bonding apparatus for modular shafts |
USD444526S1 (en) * | 1999-06-29 | 2001-07-03 | Adams Golf Ip, Lp | Set of golf club shafts |
US6328660B1 (en) * | 1999-03-01 | 2001-12-11 | Bunn, Iii Julian W. | Method for club fitting |
US6343999B1 (en) * | 1999-09-20 | 2002-02-05 | Adams Golf Ip Lp | Set of golf club shafts |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1286255A (en) * | 1968-10-04 | 1972-08-23 | Dunlop Holdings Ltd | Matched sets of golf clubs |
US5253867A (en) * | 1989-09-27 | 1993-10-19 | Gafner Donald M | Multi-component shaft for golf clubs |
US6139444A (en) * | 1997-11-26 | 2000-10-31 | Taylor Made Golf Company, Inc. | Golf shaft and method of manufacturing the same |
US20020082111A1 (en) * | 2000-12-21 | 2002-06-27 | Hedrick Michael W. | Metal and composite golf club shaft |
-
2002
- 2002-08-27 US US10/228,392 patent/US20040043825A1/en not_active Abandoned
-
2003
- 2003-08-01 AU AU2003231604A patent/AU2003231604A1/en not_active Abandoned
- 2003-08-14 TW TW092122358A patent/TWI224520B/en not_active IP Right Cessation
- 2003-08-19 EP EP03018822A patent/EP1393782A1/en not_active Withdrawn
- 2003-08-25 JP JP2003300364A patent/JP2004081863A/en active Pending
- 2003-08-27 CA CA002438404A patent/CA2438404A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4563007A (en) * | 1980-03-13 | 1986-01-07 | Ti Accles & Pollock Limited | Golf club shafts |
US4836545A (en) * | 1988-11-07 | 1989-06-06 | Pompa J Benedict | Two piece metallic and composite golf shaft |
US5505446A (en) * | 1990-10-19 | 1996-04-09 | Whitaker; William T. | Variable flex shaft system for an array of golf clubs |
US5924936A (en) * | 1997-10-15 | 1999-07-20 | Penley Sports, L.L.C. | Individually matched set of club shafts and a method for manufacturing an individually matched set of club shafts |
US6328660B1 (en) * | 1999-03-01 | 2001-12-11 | Bunn, Iii Julian W. | Method for club fitting |
USD444526S1 (en) * | 1999-06-29 | 2001-07-03 | Adams Golf Ip, Lp | Set of golf club shafts |
US6343999B1 (en) * | 1999-09-20 | 2002-02-05 | Adams Golf Ip Lp | Set of golf club shafts |
US6203447B1 (en) * | 1999-12-07 | 2001-03-20 | True Temper Sports, Inc. | Bonding apparatus for modular shafts |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10378684B2 (en) | 2004-09-28 | 2019-08-13 | Advanced Composite Products & Technology, Inc. | Composite tube to metal joint apparatus |
US20150021905A1 (en) * | 2004-09-28 | 2015-01-22 | Advanced Composite Products & Technology, Inc. | Composite drill pipe and method for forming same |
US11143338B2 (en) | 2004-09-28 | 2021-10-12 | Advanced Composite Products & Technology, Inc. | Composite to metal end fitting joint |
US9689514B2 (en) | 2004-09-28 | 2017-06-27 | Advanced Composite Products & Technology, Inc. | Composite pipe to metal joint |
US9810353B2 (en) * | 2004-09-28 | 2017-11-07 | Advanced Composite Products & Technology, Inc. | Method of making a composite tube to metal joint |
US11009156B2 (en) | 2004-09-28 | 2021-05-18 | Advanced Composite Products & Technology, Inc. | Composite drill pipe |
US7252598B2 (en) | 2004-10-18 | 2007-08-07 | Balance-Certified Golf, Inc. | Shaft coupler |
US20060084520A1 (en) * | 2004-10-18 | 2006-04-20 | Balance-Certified Golf, Inc. | Shaft coupler |
US20060135282A1 (en) * | 2004-12-17 | 2006-06-22 | Integran Technologies, Inc. | Article comprising a fine-grained metallic material and a polymeric material |
US20080090066A1 (en) * | 2004-12-17 | 2008-04-17 | Integran Technologies, Inc. | Article comprising a fine-grained metallic material and a polymeric material |
US20080254310A1 (en) * | 2004-12-17 | 2008-10-16 | Integran Technologies, Inc. | Article comprising a fine-Grained metallic material and a polymeric material |
US7771289B2 (en) | 2004-12-17 | 2010-08-10 | Integran Technologies, Inc. | Sports articles formed using nanostructured materials |
US8157669B2 (en) | 2009-06-15 | 2012-04-17 | Wilson Sporting Goods Co. | Multi-sectional co-cured golf shaft |
US10940376B2 (en) | 2015-03-19 | 2021-03-09 | Karsten Manufacturing Corporation | Method of manufacturing a system of golf clubs |
US10112086B2 (en) | 2015-03-19 | 2018-10-30 | Karsten Manufacturing Corporation | Ascending weight iron shaft system |
US20210228952A1 (en) * | 2015-03-19 | 2021-07-29 | Karsten Manufacturing Corporation | Ascending weight iron shaft system |
WO2016149210A1 (en) * | 2015-03-19 | 2016-09-22 | Karsten Manufacturing Corporation | Ascending weight iron shaft system |
US10342958B2 (en) | 2017-06-30 | 2019-07-09 | Abbott Cardiovascular Systems Inc. | System and method for correcting valve regurgitation |
US10213666B1 (en) * | 2018-01-31 | 2019-02-26 | Breakthrough Golf Technology Llc | Golf shaft |
US10729952B2 (en) | 2018-01-31 | 2020-08-04 | Breakthrough Golf Technology, Llc | Golf shaft |
US10857433B2 (en) | 2018-01-31 | 2020-12-08 | Breakthrough Golf Technology, Llc | Golf shaft system and golf shaft |
US11045700B2 (en) | 2018-01-31 | 2021-06-29 | Breakthrough Golf Technology, Llc | Golf shaft |
US11358041B2 (en) | 2018-01-31 | 2022-06-14 | Breakthrough Golf Technology Llc | Golf shaft system and golf shaft |
US11752407B2 (en) | 2018-01-31 | 2023-09-12 | Breakthrough Golf Technology Llc | Golf shaft system and golf shaft |
Also Published As
Publication number | Publication date |
---|---|
AU2003231604A1 (en) | 2004-03-18 |
JP2004081863A (en) | 2004-03-18 |
CA2438404A1 (en) | 2004-02-27 |
TWI224520B (en) | 2004-12-01 |
TW200404590A (en) | 2004-04-01 |
EP1393782A1 (en) | 2004-03-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TRUE TEMPER SPORTS, INC., TENNESSEE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HORWOOD, GRAEME;COKEING, SCOTT;RUMP, KENNEY;REEL/FRAME:013237/0213 Effective date: 20020809 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: TRUE TEMPER CORPORATION, TENNESSEE Free format text: RELEASE OF INTELLECTUAL PROPERTY SECURITY AGREEMENT RECORDED AT REEL 015127/FRAME 0662 AND REEL 015127/FRAME 0535;ASSIGNOR:CREDIT SUISSE AG (FORMERLY CREDIT SUISSE FIRST BOSTON);REEL/FRAME:023691/0706 Effective date: 20091211 Owner name: TRUE TEMPER SPORTS, INC., TENNESSEE Free format text: RELEASE OF INTELLECTUAL PROPERTY SECURITY AGREEMENT RECORDED AT REEL 015127/FRAME 0662 AND REEL 015127/FRAME 0535;ASSIGNOR:CREDIT SUISSE AG (FORMERLY CREDIT SUISSE FIRST BOSTON);REEL/FRAME:023691/0706 Effective date: 20091211 |