EP0537358A1 - Golfschläger - Google Patents
Golfschläger Download PDFInfo
- Publication number
- EP0537358A1 EP0537358A1 EP92906720A EP92906720A EP0537358A1 EP 0537358 A1 EP0537358 A1 EP 0537358A1 EP 92906720 A EP92906720 A EP 92906720A EP 92906720 A EP92906720 A EP 92906720A EP 0537358 A1 EP0537358 A1 EP 0537358A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- head
- club
- toe
- shaft
- 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.)
- Granted
Links
Images
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
- A63B53/04—Heads
- A63B53/0458—Heads with non-uniform thickness of the impact face plate
-
- 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 present invention relates to a golf club by which the directional stability and flight distance of a shot ball can be improved.
- a head In a conventional wooden club, as well as to a metal wood club, a head is in such a shape that, as shown by two dashed line in Fig. 1, it gradually expands from a shaft side to a toe side.
- the center of gravity of the head is set at a position inclined toward the toe side rather than the center of the projection plane of the head, thereby the head speed of the golf club may be increased at the time of impacting on the ball.
- an end of the back side of a club face part is, when seen from a plane, smoothly connected to the hosel, through a neck part, forming a curve (See dashed line A in Fig. 6) and thus the center of gravity of the club is set at a position slightly inclined toward a toe side.
- a head face surface usually has such a shape that the shaft side expands slightly more forward than the toe side. Accordingly, curvature along the transverse direction of the face surface and curvature along longitudinal direction of the face surface are not the same; usually curvature along longitudinal direction is larger than that along the transverse direction.
- the covering motion is not the only problem in the iron club; that is, the center of gravity of the iron club slightly inclines toward the toe side in the club face part, therefore for advanced golfers whose down swings are faster than those of beginners, a toe down phenomenon, in which the neck part is twisted downwardly by an accelerated motion applied to the head and thus the toe side of the club face part tends to be lowered, resulting in duff shot.
- the inventor for the purpose of overcoming the defects of the conventional club head, the inventor, as a result of his sharp research, has converted the basic concept of designing the club head to a new one in order to provide a golf club head by which improvement in the directional stability and flight distance of the shot ball can be realized. That is the object of the present invention.
- the present invention has been completed on the inventive concept found by us that due to the property of the sling motion of the club head round the gravity center thereof, in which a heavier part goes forward and a lighter part does not catch up with the heavier part in a manner that the heavier part and the lighter part rotate around the gravity center axis, the conventional club head is subjected not only to the above-mentioned covering movement but also to a pull-back phenomenon in the shaft side as a reaction of the covering movement, accordingly resulting in substantial decrease of the speed of the head.
- the present invention is, therefore, to provide a golf club which head is formed in such a manner that the amount of a shaft side is increased as much as the amount of a head toe side is decreased so as to shift the center of gravity of the head toward the shaft side and a radius of a rotation, with its center line of the rotation positioned at a vertical line made by suspending an upper end of a shaft, is decreased.
- the curvatures along the transverse direction and along the longitudinal direction of the face surface are substantially the same. Since the flight direction of the shot golf ball is dominated by both curvatures along the transverse direction and along the longitudinal direction of the face surface of a point where the impact is given, when the curvatures are not the same, the flight direction is not controlled to a desired direction. In the present invention, however, the covering motion of the head at the time of the impact is inhibited by shifting the center of gravity of the head toward the shaft side, resulting in that the head face surface is formed by a sphere having substantially the same curvatures along both directions of the face surface, which spherical face is most suitable for giving an impact causing the shot ball controlled.
- the shot ball tends to direct to the extension of the line connecting the center C of spherical body defining the spherical face and the position where the impact was given, by which superior directional stability of the shot ball is ensured.
- a back side 122 of a club face part 102 it is preferable to form a back side 122 of a club face part 102 by extending the back side 122 until it passes through the center axis (a) of the hosel part 103 (See Fig. 6), and moreover it is preferable to increase thickness A of the back side 122 of a neck part 4 by shifting a part of the weight of the toe side B (See Fig. 8).
- the defect of the conventional club in which the head easily turns after the impact and therefore golfers are apt to duff (See Fig. 11(a)), can be overcome. Namely, an impact is given in a slightly open position and immediately after this, the position becomes square and then the head turns little by little, which makes the shot ball to fly in a high draw trajectory (See Fig. 11(b)).
- Fig. 1 is a plane view comparing the plane shape of a metal head according to the present invention with that of a conventional metal head.
- Fig. 2 is a comparative view showing sling motions of wooden clubs with the metal head according to the present invention and with the conventional metal head.
- Fig. 3(a) is an explanatory view showing motion of the conventional metal head before and after an impact.
- Fig. 3(b) is an explanatory view showing motion of the metal head according to the present invention before and after an impact.
- Fig. 4 is a perspective view showing the idea of designing a face surface of the metal head according to the present invention.
- Fig. 5 is a rear view showing a head part of an iron club according to the present invention.
- Fig. 6 is a sectional view along - line in Fig. 5.
- Fig. 7 is a schematical perspective view showing the club according to the present invention.
- Fig. 8 is a rear view showing an iron club according to another example of the present invention.
- Fig. 9 is a front view showing a position of the center of gravity according to the weight distribution of the present invention.
- Fig. 10 is a comparative explanatory view showing a toe-down phenomenon in a club according to the present invention (solid line) and in a conventional club.
- Fig. 11 is a comparative explanatory view showing a covering motion in an iron club according to the present invention (a) and in a conventional club (b).
- Fig. 1 is a plane view illustrating a projected plane of a metal head according to the present invention, comparing with a conventional metal head.
- a metal head 1 is a hollow casting, having a spherical face 2 and a hosel part 3 connecting with an unshown shaft.
- the weight distribution 11 of a toe side is shifted to the back of a shaft side 12 and expanded (See an extent of oblique line).
- the distribution of the amount is not symmetrical, but leans toward the shaft area rather than the toe area. Therefore besides the center of gravity of the head shifts from G0 to the shaft side G1, the distribution of the amount in the shaft side is increased.
- the superior weight distribution which, at the moment of giving an impact, suppresses the covering motion in the toe side and the draw phenomenon in the shaft side, can be obtained.
- the curvature R along the transverse direction and the curvature R along the longitudinal direction are unified and the face 2 surface is so designed that it forms a part of a sphere with radius R round a center C as illustrated.
- the hosel part 103 obliquely protrudes upward from a position adjacent to the face surface translated in parallel to the center of the sphere.
- the loft angle of the face surface generally falls on the range from about 9°- 12° and both curvatures along the transverse and longitudinal directions of the face are selected from the range from 9 - 12R so that they are the same.
- FIGs. 4 to 7 illustrate an iron golf club according to an example of this invention.
- a club head 101 is formed by integrally connecting a club face part 102 and a hosel part 103 at a neck part 104.
- the club head 101 is integrally manufactured with use of an iron material or a copper material by means of forging or casting and polished for finishing.
- a fixed hole 130 is formed along the longitudinal direction of the hosel part 103.
- a shaft 105 is engaged with and fixed to the fixed hole 130 and at the upper side of the shaft, a grip (not shown) is provided.
- the club face part 102 comprises a face 120 made open by 1.5° from a square, a sole 121 and a back side 122.
- the back side 122 is formed in such a manner that the back side 122 is extended to a position passing through the center axis (a) of the hosel part 103 and connected to the hosel part 103 through an end surface.
- the thickness of the back side 122 of the club face part 102 therefore, is increased and compared with the shape of a conventional club head, the neck part is made much smaller. As a result, the weight of the neck part is increased and, as shown in Fig. 9, the center of gravity of the club head is located at or adjacent to an intersection point of diagonals of the face part.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Golf Clubs (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96120334A EP0773046A1 (de) | 1991-05-01 | 1992-03-13 | Golfschläger |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP130375/91 | 1991-05-01 | ||
JP3130375A JP2943947B2 (ja) | 1990-05-02 | 1991-05-01 | アイアン型ゴルフクラブ |
JP03355888A JP3025825B2 (ja) | 1991-12-21 | 1991-12-21 | メタルウッドクラブ |
JP355888/91 | 1991-12-21 | ||
PCT/JP1992/000303 WO1992019327A1 (fr) | 1991-05-01 | 1992-03-13 | Club de golf |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96120334A Division EP0773046A1 (de) | 1991-05-01 | 1992-03-13 | Golfschläger |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0537358A1 true EP0537358A1 (de) | 1993-04-21 |
EP0537358A4 EP0537358A4 (en) | 1993-07-28 |
EP0537358B1 EP0537358B1 (de) | 1998-06-10 |
Family
ID=26465517
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96120334A Withdrawn EP0773046A1 (de) | 1991-05-01 | 1992-03-13 | Golfschläger |
EP92906720A Expired - Lifetime EP0537358B1 (de) | 1991-05-01 | 1992-03-13 | Golfschläger |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96120334A Withdrawn EP0773046A1 (de) | 1991-05-01 | 1992-03-13 | Golfschläger |
Country Status (6)
Country | Link |
---|---|
EP (2) | EP0773046A1 (de) |
KR (1) | KR970007191B1 (de) |
CA (1) | CA2086421A1 (de) |
DE (1) | DE69225860T2 (de) |
TW (1) | TW365179U (de) |
WO (1) | WO1992019327A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110053702A1 (en) * | 2009-08-25 | 2011-03-03 | Nike, Inc | Golf Clubs and Golf Club Heads Having A Configured Shape |
US10335654B2 (en) | 2009-08-25 | 2019-07-02 | Karsten Manufacturing Corporation | Golf clubs and golf club heads having a configured shape |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8012039B2 (en) | 2007-12-21 | 2011-09-06 | Taylor Made Golf Company, Inc. | Golf club head |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2683036A (en) * | 1949-07-20 | 1954-07-06 | George F Klein | Nonshanking golfing iron |
US4211416A (en) * | 1978-11-22 | 1980-07-08 | Swanson Arthur P | Golf club |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB414516A (en) * | 1933-08-02 | 1934-08-09 | Walter Scott | Improvements in and connected with golf clubs |
GB658017A (en) * | 1949-07-18 | 1951-10-03 | George Frederick Klein | Non-shanking golfing irons |
GB876414A (en) * | 1959-10-16 | 1961-08-30 | Karl Stecher | Improvements in or relating to golf clubs |
US3020048A (en) * | 1960-05-20 | 1962-02-06 | Robert L Carroll | Golf iron |
US3059926A (en) * | 1960-07-25 | 1962-10-23 | Johnstone James | Set of golf clubs |
JPS5940060Y2 (ja) * | 1977-12-30 | 1984-11-12 | マルマンゴルフ株式会社 | アイアンクラブセット |
JPS5663470U (de) * | 1979-10-23 | 1981-05-28 | ||
JPS582133U (ja) * | 1981-06-29 | 1983-01-08 | 新明和工業株式会社 | 危険性粉粒体の輸送車 |
JPS6085769A (ja) * | 1983-10-18 | 1985-05-15 | ヤマハ株式会社 | ゴルフ用ウツドクラブヘツド |
JPS61159961U (de) * | 1985-03-24 | 1986-10-03 | ||
JPS6259059U (de) * | 1985-10-03 | 1987-04-13 | ||
JPS6443278A (en) * | 1987-08-08 | 1989-02-15 | Asics Corp | Head for golf club |
-
1992
- 1992-01-31 TW TW082218645U patent/TW365179U/zh unknown
- 1992-03-13 EP EP96120334A patent/EP0773046A1/de not_active Withdrawn
- 1992-03-13 DE DE69225860T patent/DE69225860T2/de not_active Expired - Fee Related
- 1992-03-13 WO PCT/JP1992/000303 patent/WO1992019327A1/ja active Application Filing
- 1992-03-13 EP EP92906720A patent/EP0537358B1/de not_active Expired - Lifetime
- 1992-03-13 KR KR1019920703421A patent/KR970007191B1/ko not_active IP Right Cessation
- 1992-03-13 CA CA002086421A patent/CA2086421A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2683036A (en) * | 1949-07-20 | 1954-07-06 | George F Klein | Nonshanking golfing iron |
US4211416A (en) * | 1978-11-22 | 1980-07-08 | Swanson Arthur P | Golf club |
Non-Patent Citations (1)
Title |
---|
See also references of WO9219327A1 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110053702A1 (en) * | 2009-08-25 | 2011-03-03 | Nike, Inc | Golf Clubs and Golf Club Heads Having A Configured Shape |
US8517862B2 (en) * | 2009-08-25 | 2013-08-27 | Nike, Inc. | Golf clubs and golf club heads having a configured shape |
US10335654B2 (en) | 2009-08-25 | 2019-07-02 | Karsten Manufacturing Corporation | Golf clubs and golf club heads having a configured shape |
US10751588B2 (en) | 2009-08-25 | 2020-08-25 | Karsten Manufacturing Corporation | Golf clubs and golf club heads having a configured shape |
US11358038B2 (en) | 2009-08-25 | 2022-06-14 | Karsten Manufacturing Corporation | Golf clubs and golf club heads having a configured shape |
Also Published As
Publication number | Publication date |
---|---|
KR930701212A (ko) | 1993-06-11 |
CA2086421A1 (en) | 1992-11-02 |
WO1992019327A1 (fr) | 1992-11-12 |
EP0537358B1 (de) | 1998-06-10 |
KR970007191B1 (ko) | 1997-05-07 |
DE69225860T2 (de) | 1998-10-29 |
TW365179U (en) | 1999-07-21 |
EP0773046A1 (de) | 1997-05-14 |
DE69225860D1 (de) | 1998-07-16 |
EP0537358A4 (en) | 1993-07-28 |
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