US3764137A - Combination stiff and flexible golf club shaft - Google Patents
Combination stiff and flexible golf club shaftDownload PDFInfo
- Publication number
- US3764137A US3764137AUS00261547AUS3764137DAUS3764137AUS 3764137 AUS3764137 AUS 3764137AUS 00261547 AUS00261547 AUS 00261547AUS 3764137D AUS3764137D AUS 3764137DAUS 3764137 AUS3764137 AUS 3764137A
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- shaft
- golf club
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- swing
- rearwardly facing
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- 239000002184metalSubstances0.000claimsdescription5
- 230000002401inhibitory effectEffects0.000claimsdescription2
- 238000010276constructionMethods0.000abstractdescription2
- 238000009877renderingMethods0.000description4
- 238000006073displacement reactionMethods0.000description3
- 238000005452bendingMethods0.000description1
- 230000006835compressionEffects0.000description1
- 238000007906compressionMethods0.000description1
- 230000000694effectsEffects0.000description1
- 230000004886head movementEffects0.000description1
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- 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
- 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
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/0081—Substantially flexible shafts; Hinged shafts
Definitions
- ABSTRACT[52] U S Cl 273/80 B v I [51] Int. A631) 53/12 A golf club havmg a Shaft C(mstrucnon that mhlblts 58 Field of Search 273/77 R, 80 R, 80 B, rearward flexing of the Shaft at the p of t back 273/81 R 193 R, 194 R, 3 R, 2 R swing and initial part of the down swing while permitting forward flexing through the ball on the down swing.
- a rearwardly facing side of a wall of the shaftis formed of a plurality of sections that extend longitudinally along the shaft and that have proximately located facing ends.
- FIG. 21 mm 30 LS PATENTED OUT 9 FIG. 2
- golf club shaftsare designed in different thicknesses to thus vary the shaft stiffness. Golfers select shaft stiffness depending on their strength or ability to swing the club head forwardly against the ball against the resistance presented by the shaft rigidity.
- a relatively strong golferwill select a relatively stiff shaft due to his having the strength in his hands to overcome the resistance of the shaft to forward flexing as the club head engages the ball.
- a relatively weak golfermust necessarily use a more flexible shaft so that the shaft will flex forwardly during the down swing to increase the head velocity at the moment of impact of the head with the ball.
- a flexible shaftthere is also a rearward flexing of the shaft at the end of the back swing and at the beginning of the down swing. Ifa golfer swings too fast with a flexible shaft, there is a large rearward head displacement at the end of the back swing and at the beginning of the down swing so that the club head will be rearwardly displaced by the bending of the shaft during the initial part of the down swing if the speed of the down swing is too great.
- the object of this inventionis to provide a golf club shaft construction which will inhibit rearward displacement'of the golf club head by minimizing rearward shaft flexing and will, nevertheless, permit easier forward head movement through the impact zone to provide for the increased velocity of the head at the mo-- I minimizes shaft flexing rearwardly.
- the proximate section endsmove away from each other to permit the shaft to flex forwardly.
- FIG. Iis an elevation of the golf club
- FIG. 2is a section of a part of the golf club shaft
- FIG. 3is a view taken on the line 3-3 of FIG. 2;
- FIG. 4is a section taken on the line 4-4 of FIG. 3;
- FIG. 5is a section similar to FIG. 2, but showing the shaft while it is flexing forwardly;
- FIG. 6is a section similar to FIG. 4, but showing the 0 sections as being mounted on the rearwardly facing side of thefront portion of a tubular shaft;
- FIGS. 7 through 9are views of different species of the invention.
- FIG. Ishows a golf club I0 having a head 12 and a grip 14 that are separated by a resilient shaft I6.
- the shaft 16as is conventional, is formed of a hollowtubular member.
- the front of the shaftis considered to be that side of the shaft that faces toward the golf ball when the golf club is suwng towards the ball and the back of the shaft is considered to be that side of the shaft that faces away from the golf ball when the golf club is swung towards the golf ball.
- the shaft I6has a substantially uniform wall thickness.
- a plurality of metal sections 18extend longitudinally along the shaft l6 on the rearwardly facing side of the back portion of the shaft 16 and are secured thereto as, for example, by being bonded thereto.
- the facing ends of the sections 18are parallel to each other and are proximately located by either being spaced very close to each other or by abutting each other.
- rearwardly facing or back side of the shaft exterior peripheryis under compression and the adjoining edges of the sections 18 are forced against each other to thus minimize rearward flexing of the shaft 16.
- the rearwardly facing or back side of the shaftgoes into tension and the shaft may flex more easily forward, as indicated in FIG. 5, with the adjoining ends of the sections 18 separating from each other.
- the metal sections 18preferably extend along the lower one-half to one-third of the shaft as indicated in FIG. I.
- the sectionsl8are preferably made smaller as theyextend downwardly of the shaft 16, as shown in FIG. 3.
- the shaft 16 with attached sections 18is rigid or stiff against rearward flexing so that the head I2 will only deflect minimally rearwardly with respect to a plane lengthwise through the grip 14 of the club at the end of the back swing and the beginning of the down swing.
- the head 12will swing more readily forwardly relative to the plane through the grip 14 to thus increase the velocity of the head at the moment of impact with the ball and thereby impart increased energy to the ball to thus increase the travel distance of the hit ball. Since the head deflects less with respect to the plane through the When the shaft tends to bend backwards at the top of the back swing and initial part of the down swing, the
- FIG. 7shows a tubular golf club shaft 20 wherein the back shaft portion 22 (the portion facing away from the golf ball during the down swing) is made thicker than the front shaft portion 24.
- a series of thin slits 26are formed in the rearwardly facing side of the back portion 22 that are spaced lengthwise of the shaft and lie in planes that are at right angles to the shaft axis.
- the slits 26separate the rearwardly facing side of the shaft back portion into sections 27 that function similarly to the sections IS in rendering the shaft rigid or stiff during rearward flexing and in rendering the shaft flexible during forward flexing.
- FIG. 7Athis same concept is attainable wherein the front shaft portion 24' (the portion facing toward the golf ball during the down swing) of a tubular golf club shaft 20' is made thicker than the back shaft portion 22'.
- a series of thin slits 26'are formed in the rearwardly facing side of the front portion 24' that are spaced lengthwise of the shaft and lie in planes that are at right angles to the shaft axis.
- the slits 26'separate the rearwardly facing side of the shaft front portion into sections 27' that function similarly to sections 18 in.
- the shaftis rendered rigid against rearward flexing due to an increase in the compressive strength of a rearwardly facing side of the shaft. While these arrangements may also slightly increase the tensile strength of said shaft side, they do not do so to such an extent as to materially inhibit the flexibility of the shaft through the impact zone.
- FIGS. 8 and 9may be provided.
- metal sections 28 (FIG. 8) or 30 (FIG. 9)extend at least 180 about the periphery of the shaft 16 and are fastened along the axial centerline of the shaft to the shaft periphery by fasteners 32. As in the arrangement of FIG. 2, the facing edges of the sections 28 and 30 are either close to eace other or abut each other in the unflexed condition of the shaft I claim:
- a golf clubhaving a shaft extending between a head and a grip, the head being adapted to hit a golf ball while moving forwardly during a down swing that is imparted to the club while it is being held by the grip after the club has been moved through a back swing;
- said shaftcomprising: a plurality of adjacent sections located exclusively on a rearwardly facing side of said shaft and extending longitudinally of said shaft, an end of each of said sections facing an end of an adjoining section, said plurality of sections constituting means on said shaft whereby said ends are proximate to each other in an unflexed condition of said shaft, forced against each other during a back swing and the initial part of the down swing thereby inhibiting rearward flexing of said shaft, and spaced apart from each other during the latter part of the down swing thereby allowing forward flexing of said shaft 2.
- the golf ball club of claim Iwherein the shaft is tubular and wherein the sections are on the rearwardly facing side of the back portion of the shaft.
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Golf Clubs (AREA)
Abstract
Description
[111 3,764,137 [451 Oct. 9, 1973 2,992,828 7/1961 Stewart.....................,.....,. 273/80 B FOREIGN PATENTS OR APPLICATIONS COMBINATION STIFF AND FLEXIBLE GOLF CLUB SHAFT Anthony J. Petro, Box 338, Dippel Manor, Pa. 18201 June 9, 1972 9,625 4/1914 Great Britain 273/80 B [76] Inventor:
Primary Examiner-Richard C. Pinkham Assistant Examiner-Richard J. Apley Attorney-D. Paul Weaver et al.
[22] Filed:
[21] Appl. No.: 261,547
ABSTRACT [52] U SCl 273/80 B v I [51] Int. A631) 53/12 A golf club havmg a Shaft C(mstrucnon that mhlblts 58 Field ofSearch 273/77 R, 80 R, 80 B, rearward flexing of the Shaft at the p of t back 273/81 R 193 R, 194 R, 3 R, 2 R swing and initial part of the down swing while permitting forward flexing through the ball on the down swing. A rearwardly facing side of a wall of the shaft is formed of a plurality of sections that extend longitudinally along the shaft and that have proximately located facing ends.
1 mm 30 LS PATENTED OUT 9 FIG. 2
/III I FIG. 4
FIG. .9
FIG. 8
COMBINATION STIFF AND FLEXIBLE GOLF CLUB SHAFT BACKGROUND OF THE INVENTION ball, the farther it will go. The kinetic energy is equal to one-half of mass times velocity squared. In using a golf club to drive a golf ball it is therefore desired to impart as much velocity as'is feasible to the club head.
Presently, golf club shafts are designed in different thicknesses to thus vary the shaft stiffness. Golfers select shaft stiffness depending on their strength or ability to swing the club head forwardly against the ball against the resistance presented by the shaft rigidity.
A relatively strong golfer will select a relatively stiff shaft due to his having the strength in his hands to overcome the resistance of the shaft to forward flexing as the club head engages the ball.
A relatively weak golfer must necessarily use a more flexible shaft so that the shaft will flex forwardly during the down swing to increase the head velocity at the moment of impact of the head with the ball. However, with a flexible shaft, there is also a rearward flexing of the shaft at the end of the back swing and at the beginning of the down swing. Ifa golfer swings too fast with a flexible shaft, there is a large rearward head displacement at the end of the back swing and at the beginning of the down swing so that the club head will be rearwardly displaced by the bending of the shaft during the initial part of the down swing if the speed of the down swing is too great. Therefore, with a flexible shaft, a golfer must swing slower than he is able toin order to minimize rearward head displacement and allow the head to square itself on impact with the ball. As a result, although it is easier to swing a flexible shaft from a strength standpoint, the necessity of a slower swing reduces the velocity of the club head at the moment of impact of the head with the ball to thus reduce the distance the hit ball will travel.
SUMMARY OF THE INVENTION The object of this invention is to provide a golf club shaft construction which will inhibit rearward displacement'of the golf club head by minimizing rearward shaft flexing and will, nevertheless, permit easier forward head movement through the impact zone to provide for the increased velocity of the head at the mo-- I minimizes shaft flexing rearwardly. Through the impact zone, the proximate section ends move away from each other to permit the shaft to flex forwardly.
While the prior art, as illustrated by US. Pat. Nos. 2,078,728 and 2,220,852 show golf club shafts having sections with facing ends extending longitudinally of the shaft, these sections are not so located as to' solely face rearwardly of the shaft for the purpose of this invention.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is an elevation of the golf club;
FIG. 2 is a section of a part of the golf club shaft;
FIG. 3 is a view taken on the line 3-3 of FIG. 2;
FIG. 4 is a section taken on the line 4-4 of FIG. 3;
FIG. 5 is a section similar to FIG. 2, but showing the shaft while it is flexing forwardly;
FIG. 6 is a section similar to FIG. 4, but showing the 0 sections as being mounted on the rearwardly facing side of thefront portion of a tubular shaft; and
FIGS. 7 through 9 are views of different species of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. I shows a golf club I0 having ahead 12 and a grip 14 that are separated by a resilient shaft I6. Theshaft 16, as is conventional, is formed of a hollowtubular member. The front of the shaft is considered to be that side of the shaft that faces toward the golf ball when the golf club is suwng towards the ball and the back of the shaft is considered to be that side of the shaft that faces away from the golf ball when the golf club is swung towards the golf ball.
Referring to FIGS. 24, the shaft I6 has a substantially uniform wall thickness. A plurality ofmetal sections 18 extend longitudinally along the shaft l6 on the rearwardly facing side of the back portion of theshaft 16 and are secured thereto as, for example, by being bonded thereto. In the unflexed condition of theshaft 16, the facing ends of thesections 18 are parallel to each other and are proximately located by either being spaced very close to each other or by abutting each other.
rearwardly facing or back side of the shaft exterior periphery is under compression and the adjoining edges of thesections 18 are forced against each other to thus minimize rearward flexing of theshaft 16. However, when the club head is entering the impact zone on the down swing, the rearwardly facing or back side of the shaft goes into tension and the shaft may flex more easily forward, as indicated in FIG. 5, with the adjoining ends of thesections 18 separating from each other.
Since the lower part of theshaft 16 has the maximum flexing duringthe down swing, and since in certain circumstances, it would be desirable not to'add an undue amount of weight to the shaft, themetal sections 18 preferably extend along the lower one-half to one-third of the shaft as indicated in FIG. I. For the same reason, the sectionsl8 are preferably made smaller as theyextend downwardly of theshaft 16, as shown in FIG. 3. In view of the foregoing, it can be seen that theshaft 16 with attachedsections 18 is rigid or stiff against rearward flexing so that the head I2 will only deflect minimally rearwardly with respect to a plane lengthwise through the grip 14 of the club at the end of the back swing and the beginning of the down swing. However, through the impact zone on the down swing, thehead 12 will swing more readily forwardly relative to the plane through the grip 14 to thus increase the velocity of the head at the moment of impact with the ball and thereby impart increased energy to the ball to thus increase the travel distance of the hit ball. Since the head deflects less with respect to the plane through the When the shaft tends to bend backwards at the top of the back swing and initial part of the down swing, the
grip on rearward shaft flexing, the golfer will not have to deliberately swing slower during the down swing to wait for the head to move from its rearwardly deflected position relative to the grip of the club.
Instead of mounting thesections 18 to the rearwardly facing exterior of the back portion of theshaft 16, the same effect may be accomplished as shown in FIG. 6 by mounting thesections 18 to the rearwardly facing side of the front portion of thetubular shaft 16 on the inner periphery of the shaft.
FIG. 7 shows a tubulargolf club shaft 20 wherein the back shaft portion 22 (the portion facing away from the golf ball during the down swing) is made thicker than thefront shaft portion 24. A series ofthin slits 26 are formed in the rearwardly facing side of theback portion 22 that are spaced lengthwise of the shaft and lie in planes that are at right angles to the shaft axis. Theslits 26 separate the rearwardly facing side of the shaft back portion intosections 27 that function similarly to the sections IS in rendering the shaft rigid or stiff during rearward flexing and in rendering the shaft flexible during forward flexing.
As shown in FIG. 7A, this same concept is attainable wherein the front shaft portion 24' (the portion facing toward the golf ball during the down swing) of a tubular golf club shaft 20' is made thicker than the back shaft portion 22'. A series of thin slits 26' are formed in the rearwardly facing side of the front portion 24' that are spaced lengthwise of the shaft and lie in planes that are at right angles to the shaft axis. The slits 26' separate the rearwardly facing side of the shaft front portion into sections 27' that function similarly tosections 18 in.
rendering the shaft rigid or stiff during rearward flexing and in rendering the shaft flexible during forward'flexmg.
In arrangements discussed above, the shaft is rendered rigid against rearward flexing due to an increase in the compressive strength of a rearwardly facing side of the shaft. While these arrangements may also slightly increase the tensile strength of said shaft side, they do not do so to such an extent as to materially inhibit the flexibility of the shaft through the impact zone. In order to increase the compressive strength of a rearwardly facing side of the shaft without increasing its tensile strength, the arrangements of FIGS. 8 and 9 may be provided. In these Figures, metal sections 28 (FIG. 8) or 30 (FIG. 9) extend at least 180 about the periphery of theshaft 16 and are fastened along the axial centerline of the shaft to the shaft periphery byfasteners 32. As in the arrangement of FIG. 2, the facing edges of thesections 28 and 30 are either close to eace other or abut each other in the unflexed condition of the shaft I claim:
I. In a golf club having a shaft extending between a head and a grip, the head being adapted to hit a golf ball while moving forwardly during a down swing that is imparted to the club while it is being held by the grip after the club has been moved through a back swing; said shaft comprising: a plurality of adjacent sections located exclusively on a rearwardly facing side of said shaft and extending longitudinally of said shaft, an end of each of said sections facing an end of an adjoining section, said plurality of sections constituting means on said shaft whereby said ends are proximate to each other in an unflexed condition of said shaft, forced against each other during a back swing and the initial part of the down swing thereby inhibiting rearward flexing of said shaft, and spaced apart from each other during the latter part of the down swing thereby allowing forward flexing of said shaft 2. The golf ball club of claim I wherein the shaft is tubular and wherein the sections are on the rearwardly facing side of the back portion of the shaft.
3. The golf club of claim I wherein the shaft is tubular and wherein the sections are on the rewarwardly facing side of the front portion of the shaft.
4. The golf club of cairn 1 wherein a plurality of rearwardly facing slits intersecting the shaft periphery are formed in the rearwardly facing side of the shaft to thus form said sections.
5. The golf club ofclaim 4 wherein the shaft is tubular and wherein the back portion of the shaft, containing the slits, is thicker than the front portion of the shaft.
6. The golf club ofclaim 4 wherein the shaft is tubular and wherein the front portion of the shaft, containing the slits, is thicker than the back portion of the shaft.
7. The golf club of claim I wherein said sections extend at least about the periphery of the shaft and are fastened to the shaft periphery along the longitudinal centerline of the shaft.
8. The golf club of claim I wherein said sections extend along the lower part of the shaft.
9. The golf club of claim I wherein said sections are made of metal and are bonded on said shaft.
10. The golf club of claim I wherein said sections are progressively smaller as they extend downwardly of said shaft.
11. The golf club ofclaim 10 wherein said sections extend along the lower part of the shaft.
Claims (11)
1. In a golf club having a shaft extending between a head and a grip, the head being adapted to hit a golf ball while moving forwardly during a down swing that is imparted to the club while it is being held by the grip after the club has been moved through a back swing; said shaft comprising: a plurality of adjacent sections located exclusively on a rearwardly facing side of said shaft and extending longitudinally of said shaft, an end of each of said sections facing an end of an adjoining section, said plurality of sections constituting means on said shaft whereby said ends are proximate to each other in an unflexed condition of said shaft, forced against each other during a back swing and the initial part of the down swing thereby inhibiting rearward flexing of said shaft, and spaced apart from each other during the latter part of the down swing thereby allowing forward flexing of said shaft.
2. The golf club of claim 1 wherein the shaft is tubular and wherein the sections are on the rearwardly facing side of the back portion of the shaft.
3. The golf club of claim 1 wherein the shaft is tubular and wherein the sections are on the rearwardly facing side of the front portion of the shaft.
4. The golf club of claim 1 wherein a plurality of rearwardly facing slits intersecting the shaft periphery are formed in the rearwardly facing side of the shaft to thus form said sections.
5. The golf club of claim 4 wherein the shaft is tubular and wherein the back portion of the shaft, containing the slits, is thicker than the front portion of the shaft.
6. The golf cluB of claim 4 wherein the shaft is tubular and wherein the front portion of the shaft, containing the slits, is thicker than the back portion of the shaft.
7. The golf club of claim 1 wherein said sections extend at least 180* about the periphery of the shaft and are fastened to the shaft periphery along the longitudinal centerline of the shaft.
8. The golf club of claim 1 wherein said sections extend along the lower part of the shaft.
9. The golf club of claim 1 wherein said sections are made of metal and are bonded on said shaft.
10. The golf club of claim 1 wherein said sections are progressively smaller as they extend downwardly of said shaft.
11. The golf club of claim 10 wherein said sections extend along the lower part of the shaft.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26154772A | 1972-06-09 | 1972-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3764137Atrue US3764137A (en) | 1973-10-09 |
Family
ID=22993816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00261547AExpired - LifetimeUS3764137A (en) | 1972-06-09 | 1972-06-09 | Combination stiff and flexible golf club shaft |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3764137A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4394015A (en)* | 1982-01-05 | 1983-07-19 | Taybos Sociedad Anonima | Racket structure |
| US4460423A (en)* | 1982-01-05 | 1984-07-17 | Bosnia Omar J | Method for manufacturing a racket structure |
| US5226652A (en)* | 1989-07-14 | 1993-07-13 | Maruman Golf Kabushiki Kaisha | Golf club with improved impact property |
| US5294119A (en)* | 1991-09-27 | 1994-03-15 | Taylor Made Golf Company, Inc. | Vibration-damping device for a golf club |
| US5297791A (en)* | 1990-06-04 | 1994-03-29 | Fujikura Rubber Ltd. | Golf club shaft and method of producing the same |
| US5308062A (en)* | 1992-07-02 | 1994-05-03 | Fundamental Golf Company Pty. Ltd. | Golf club shaft and head assembly |
| WO1994021333A1 (en)* | 1993-03-18 | 1994-09-29 | Stone, Bradley, K. | Golf glubs and methods |
| US5476706A (en)* | 1992-11-16 | 1995-12-19 | Shimizu; Okiyoshi | Sporting implement having a head portion with a hitting surface for contacting a ball |
| US5634860A (en)* | 1996-03-13 | 1997-06-03 | Emhart Inc. | Golf club and shaft therefor |
| US5655975A (en)* | 1995-06-07 | 1997-08-12 | Roush Anatrol, Inc. | Golf club having vibration damping device and method for making same |
| US5665010A (en)* | 1996-02-07 | 1997-09-09 | Advanced Retrofit Components Associated Leader (In) Golf, Inc. | Composite golf club shaft |
| US5716291A (en)* | 1990-12-05 | 1998-02-10 | Taylor Made Golf Company, Inc. | Golf club shaft |
| US5935017A (en)* | 1996-06-28 | 1999-08-10 | Cobra Golf Incorporated | Golf club shaft |
| US5935027A (en)* | 1995-12-28 | 1999-08-10 | Roush Anatrol, Inc. | Multi-mode vibration absorbing device for implements |
| USD418566S (en)* | 1997-07-08 | 2000-01-04 | Cobra Golf Incorporated | Lower section of a shaft adapted for use in a golf club shaft |
| US6117021A (en)* | 1996-06-28 | 2000-09-12 | Cobra Golf, Incorporated | Golf club shaft |
| US6231456B1 (en) | 1999-04-05 | 2001-05-15 | Graham Rennie | Golf shaft vibration damper |
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|---|---|---|---|---|
| GB191409625A (en)* | 1914-04-18 | 1915-01-07 | William Henry Meguyer | Improvements in Golf Clubs. |
| US1589297A (en)* | 1921-05-10 | 1926-06-15 | Allan E Lard | Shaft for golf clubs and the like |
| US2078728A (en)* | 1936-11-30 | 1937-04-27 | Allan E Lard | Rebound check for golf club shafts |
| US2220852A (en)* | 1937-03-31 | 1940-11-05 | American Fork & Hoe Co | Golf club shaft |
| US2992828A (en)* | 1956-06-14 | 1961-07-18 | Warren A Stewart | Prestressed golf club |
- 1972
- 1972-06-09USUS00261547Apatent/US3764137A/ennot_activeExpired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191409625A (en)* | 1914-04-18 | 1915-01-07 | William Henry Meguyer | Improvements in Golf Clubs. |
| US1589297A (en)* | 1921-05-10 | 1926-06-15 | Allan E Lard | Shaft for golf clubs and the like |
| US2078728A (en)* | 1936-11-30 | 1937-04-27 | Allan E Lard | Rebound check for golf club shafts |
| US2220852A (en)* | 1937-03-31 | 1940-11-05 | American Fork & Hoe Co | Golf club shaft |
| US2992828A (en)* | 1956-06-14 | 1961-07-18 | Warren A Stewart | Prestressed golf club |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4460423A (en)* | 1982-01-05 | 1984-07-17 | Bosnia Omar J | Method for manufacturing a racket structure |
| US4394015A (en)* | 1982-01-05 | 1983-07-19 | Taybos Sociedad Anonima | Racket structure |
| US5226652A (en)* | 1989-07-14 | 1993-07-13 | Maruman Golf Kabushiki Kaisha | Golf club with improved impact property |
| US5297791A (en)* | 1990-06-04 | 1994-03-29 | Fujikura Rubber Ltd. | Golf club shaft and method of producing the same |
| US6257993B1 (en) | 1990-12-05 | 2001-07-10 | Taylor Made Golf Company, Inc. | Golf club shaft |
| US5716291A (en)* | 1990-12-05 | 1998-02-10 | Taylor Made Golf Company, Inc. | Golf club shaft |
| US5961396A (en)* | 1990-12-05 | 1999-10-05 | Taylor Made Golf Company, Inc. | Golf club shaft |
| US5294119A (en)* | 1991-09-27 | 1994-03-15 | Taylor Made Golf Company, Inc. | Vibration-damping device for a golf club |
| US5308062A (en)* | 1992-07-02 | 1994-05-03 | Fundamental Golf Company Pty. Ltd. | Golf club shaft and head assembly |
| AU658801B2 (en)* | 1992-07-02 | 1995-04-27 | Fundamental Golf Company Pty. Limited | Golf club shaft and head assembly |
| US5476706A (en)* | 1992-11-16 | 1995-12-19 | Shimizu; Okiyoshi | Sporting implement having a head portion with a hitting surface for contacting a ball |
| US5390922A (en)* | 1993-03-18 | 1995-02-21 | Bradley K. Stone | Golf clubs and methods |
| WO1994021333A1 (en)* | 1993-03-18 | 1994-09-29 | Stone, Bradley, K. | Golf glubs and methods |
| US5655975A (en)* | 1995-06-07 | 1997-08-12 | Roush Anatrol, Inc. | Golf club having vibration damping device and method for making same |
| US5935027A (en)* | 1995-12-28 | 1999-08-10 | Roush Anatrol, Inc. | Multi-mode vibration absorbing device for implements |
| US5665010A (en)* | 1996-02-07 | 1997-09-09 | Advanced Retrofit Components Associated Leader (In) Golf, Inc. | Composite golf club shaft |
| US5634860A (en)* | 1996-03-13 | 1997-06-03 | Emhart Inc. | Golf club and shaft therefor |
| US5935017A (en)* | 1996-06-28 | 1999-08-10 | Cobra Golf Incorporated | Golf club shaft |
| US6117021A (en)* | 1996-06-28 | 2000-09-12 | Cobra Golf, Incorporated | Golf club shaft |
| USD418566S (en)* | 1997-07-08 | 2000-01-04 | Cobra Golf Incorporated | Lower section of a shaft adapted for use in a golf club shaft |
| US6231456B1 (en) | 1999-04-05 | 2001-05-15 | Graham Rennie | Golf shaft vibration damper |
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