EP0594812A1 - Golf club head. - Google Patents
Golf club head.Info
- Publication number
- EP0594812A1 EP0594812A1 EP93909021A EP93909021A EP0594812A1 EP 0594812 A1 EP0594812 A1 EP 0594812A1 EP 93909021 A EP93909021 A EP 93909021A EP 93909021 A EP93909021 A EP 93909021A EP 0594812 A1 EP0594812 A1 EP 0594812A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- damping element
- head
- golf
- cavity
- 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
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
- A63B53/045—Strengthening ribs
- A63B53/0454—Strengthening ribs on the rear surface 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
- A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2209/00—Characteristics of used materials
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2209/00—Characteristics of used materials
- A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S273/00—Amusement devices: games
- Y10S273/23—High modulus filaments
Definitions
- the invention relates to a golf club head.
- a golf club head As is known, a golf club head, called “iron”, “wood” or “putter”, is either forged, or molded, or machined and is intended to be connected to a handle.
- This head has on the front a flat striking face, below a sole and a rear face on the back of the striking face. According to the manufacturers, according to the results sought and according to the manufacturing techniques used, this rear face can have the most diverse shapes.
- irons we know hollowed back faces (molded irons), or rear faces having a blade shape (forged irons).
- metal wood whose single or multi-piece body defines a closed cavity, and the wood itself, solid or laminated.
- the invention relates to a golf club head which makes it possible to attenuate the vibrations caused during hitting and to improve the sensations of the player.
- This golf club head formed of thin walls defining a front part comprising a striking face, a sole and a rear part disposed above the sole, defining a cavity on the back of the front part, and having a shock absorbing element vibration, is characterized in that at least one of the thin walls has a protruding vibration damping element, constituted by a stress plate with high elasticity modulus, connected to this rear part by a visco-elastic material.
- the invention consists in placing on a thin wall, therefore vibrating, a stress plate, connected to this face by a visco-elastic material.
- the invention consists, more precisely in the heads of golf clubs, in using such a damping element known in a totally different technical field, but by locating it at a precise point, namely on a thin partition, in particular the rear face of the striking face.
- the invention differs from the state of the art, in particular from that taught in document US-A 4 811 950, by the fact that the damping element is placed protruding on a thin wall, and no longer inserted in a massive part, which allows:
- the invention is also distinguished from this state of the art by the fact that here the stress plate no longer plays the role of "beater”, but of a stress device working in shear.
- Viscoelastic dampers As is known, “a visco-elastic material” is intended to reduce the amplitude of the vibrations by degradation of part of the deformation energy in the form of heat. Viscoelastic dampers, the main characteristics of which are that they have a low Young E modulus and a high damping coefficient, have long been in common use in aeronautics, in cars or in the manufacture of skis. It is therefore unnecessary to describe them here in detail.
- the essential characteristic is the intrinsic damping coefficient (tangent delta). This characteristic is mainly influenced by the temperature and the frequency of vibration. It is important that for the intended use, this material has a maximum damping zone, at room temperature.
- the damping coefficient must in practice be between 0.4 and 1.2. Beyond 1.2, there is too great an absorption of the energy generated by the impact on the ball, therefore a loss of efficiency. Below 0.4, there is an insensitive effect of the viscoelastic material.
- the visco-elastic materials used exhibit their optimal qualities at the usual temperatures for using golf clubs, in particular in the vicinity of ambient temperature.
- the sheet of visco-elastic material should have a thickness of less than two millimeters, and preferably between 0.5 and one millimeter. Indeed, if this thickness is less than 0.5 mm, the effects obtained are practically non-existent. On the other hand, if this thickness exceeds 1.0 mm, there is a loss of yield for a higher price. Good results are obtained with a sheet of the order of 0.5 mm.
- viscoelastic material materials in common use are used for this application, for example in the field of skiing. Mention may be made of butyl rubbers, synthetic elastomers, alone, as a mixture or loaded.
- the characteristic visco-elastic sheet adheres to the rigid plate and to the corresponding rear face of the head by means of a layer of adhesive material.
- the visco-elastic sheet comprises a double-sided adhesive so that it can be conveniently applied to the rear face on the back of the striking face.
- the visco-elastic sheet may consist of a stack of several elementary visco-elastic sheets, with different characteristics.
- the damping properties of each of them are offset in temperature for a given vibration frequency, or are offset in frequency for a given temperature.
- the visco-elastic sheet is formed by a juxtaposition of elementary zones each having optimal damping properties, also shifted in temperature and frequency.
- the characteristic damping element has a total mass, therefore a thickness, as small as possible, for example between 1 and 4 grams, advantageously in the vicinity of 2 to 2.5 grams.
- the "stress plate” which is essentially intended to facilitate the ability of the viscoelastic material to transform vibrations into heat:
- - is chosen from the group comprising aluminum alloys, aluminum-zinc-magnesium alloys known under the registered trademark
- thermosetting materials reinforced with glass fibers or carbon thermoplastic materials reinforced with glass fibers or carbon;
- this stress plate can be formed from one or more layers of material.
- the invention relates to golf clubs whose head is formed of thin walls, that is to say of the order of a few millimeters thick, for example 3 to 5 millimeters, having on the back a cavity, either open in the shape of an L for an iron, or closed but hollow for a metal wood.
- the damping element characteristic of the invention must be, as already said, arranged protruding on these thin walls to be effective and no longer completely embedded in the mass of the head. As the mass of this damping element is practically negligible compared to the mass of the head, the stress plate no longer functions as a "beater", but it works in shear.
- the club is an iron, the rear face of which has a recess forming an L-shaped open cavity (molded iron), the large branch of which is parallel and integrates the striking face and the small branch of which constitutes the sole.
- the shock absorber assembly characteristic of the invention must be positioned on the back of the striking face and at the point of impact of the bullet. It is also important that this shock absorber assembly fills only a part and not the whole of the recess defining the cavity.
- the center of gravity of the damping element (10) is arranged in the vicinity of the center of gravity of the head (3).
- the invention is particularly well suited to the manufacture of irons, it can also be used for the production of clubs called "putters”.
- the characteristic damping element can be arranged in projection, either inside the cavity of the head, or on the immediate back of the striking face, or at the outside of this head by marrying part of the elongated shape thereof, but behind the head, either on the side and / or the tip, or even the sole.
- FIG. 1 is a summary perspective view of a golf club called "iron", the head of which is shown in rear view in FIG. 2.
- Figure 3 is a head according to the invention also shown in rear view, and in Figure 4 in section along the axis IV-IN 'of Figure 3.
- Figure 5 is a detailed sectional view of the assembly vibration damper characteristic of the invention.
- FIG. 6 is a perspective view of a golf club called "wood-metal" according to the invention, shown in section in FIG. 7 along the vertical plane passing through the axis VII-VII 'of FIG. 6.
- Figures 8 to 14 schematically show other embodiments on such wood, always seen along this vertical plane passing through the axis Vu-Vil '.
- Figures 15, 16 and 17 show schematically other embodiments of such a wood seen along the horizontal plane passing through the axis VII-VIT.
- Figure 18 shows schematically in section another embodiment of such wood.
- This head (3) having an approximate section in the shape of an L, comprises respectively on the front, constituting the large branch of the L, a wall 5 millimeters thick having an external striking planar face, designated by the reference (5) ribbed, and a sole (6), forming the small branch of the L.
- the head (3) has on the rear a recess (7) forming a cavity, the shape of which varies according to the manufacturer and the desired results.
- This recess (7) follows a generally triangular shape rounded by 90 by 40 millimeters of sides.
- part of this planar recess (7) receives a characteristic damping assembly, designated by the general reference (10), located protruding at its center and comprising from the outside a rigid thin plate (11), of form general heliptic having axes of 45 and 18 millimeters, for example a plate of aluminum or aluminum-zinc-magnesium alloy marketed by CEGEDUR PECHINEY under the brand "ZICRAL", having a modulus of elasticity of 12000 MPa, a thickness of one millimeter, and weighs about 2.5 grams.
- a characteristic damping assembly designated by the general reference (10) located protruding at its center and comprising from the outside a rigid thin plate (11), of form general heliptic having axes of 45 and 18 millimeters, for example a plate of aluminum or aluminum-zinc-magnesium alloy marketed by CEGEDUR PECHINEY under the brand "ZICRAL", having a modulus of elasticity of 12000 MPa, a thickness of one millimeter, and weighs about
- This rigid plate (11) is associated with a sheet (12) with a high damping coefficient, the two internal and external faces of which have been previously coated with a thin adhesive layer, deposited right through so as to promote the joining between the visco-elastic sheet (12) and on the one hand the rigid plate (11) and on the other hand the rear face of the head (3), and more precisely of the recess (7).
- This visco-elastic sheet (12) of butyl rubber 1.0 mm thick has a damping coefficient at 25 ° C whose delta tangent is between 0.4 and 1.2, preferably 0.6 and 0.8.
- the characteristic shock absorber assembly (10) is arranged on the rear face (7) in the vicinity of the center of gravity of the head, that is to say in alignment with the ideal point of impact.
- FIGS 6 and following illustrate another embodiment of the invention applied to so-called "metal" wood.
- the head of this wood designated by the general reference (20) ( Figures 6 and 7), connected to the handle by the fitting (21) is rotomolded.
- the walls of the head (20) have a substantially constant thickness close to 3 millimeters. These walls constitute on the front a flat striking face (22), on the underside a sole (23) and on the sides (24) of the sides and a top (25), the whole forming a skirt or a one-piece crown ending with a rounded rear point (26).
- the entire skirt (24-26) forms the rear face.
- the skirt (24-26) defines a partially hollow cavity (30).
- the sole (23) is attached by any known means not shown, which makes the cavity (30) accessible.
- the rear face (31) of the striking face (22) has protruding a characteristic damping element (35) according to the invention, consisting of a rigid plate (36) similar to (11) and of a visco-elastic adhesive sheet (37) similar to (12).
- the damping element (35) is also arranged on the sole (23), possibly in addition to that disposed on the immediate rear face (31).
- the sole (23) has a housing (40) in which is embedded the damping element (36,37) to prevent it from scraping on impact.
- the characteristic damping element (35) is arranged r
- the characteristic damping element (35) is arranged on the sides (24) (see FIG. 15), or envelops the rounded rear point (26) (FIG. 16), or even an essential part of the skirt ( Figures 17 and 18).
- the clubs according to the invention have the appreciable advantage, much sought after by amateur players, of being light and nevertheless of being able to dampen vibrations, more particularly on impact, and to improve the sensations of the player.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Golf Clubs (AREA)
Abstract
Tête (3, 20) de club de golf, formée de parois minces définissant une partie avant comportant une face de frappe (5, 22), une semelle (6, 23) et une partie arrière (7; 24-26) disposée en dessus de la semelle (6, 23), définissant une cavité au dos de la partie avant, et comportant un élément amortisseur, caractérisée en ce que au moins une des parois minces présente en excroissance l'élément amortisseur (10, 35), qui est constitué par une plaque de contraintes (11, 36) à haut module d'élasticité, reliée à la partie arrière (7; 23-26) par un matériau visco-élastique (12, 37). Application: fer ou bois.Golf club head (3, 20), formed of thin walls defining a front part comprising a striking face (5, 22), a sole (6, 23) and a rear part (7; 24-26) arranged in above the sole (6, 23), defining a cavity on the back of the front part, and comprising a damping element, characterized in that at least one of the thin walls has protruding the damping element (10, 35), which consists of a stress plate (11, 36) with high elasticity modulus, connected to the rear part (7; 23-26) by a visco-elastic material (12, 37). Application: iron or wood.
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9204882A FR2689771B1 (en) | 1992-04-14 | 1992-04-14 | GOLF CLUB HEAD. |
FR9204882 | 1992-04-14 | ||
PCT/FR1993/000369 WO1993020904A1 (en) | 1992-04-14 | 1993-04-14 | Golf club head |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0594812A1 true EP0594812A1 (en) | 1994-05-04 |
EP0594812B1 EP0594812B1 (en) | 1995-06-28 |
Family
ID=9429088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93909021A Expired - Lifetime EP0594812B1 (en) | 1992-04-14 | 1993-04-14 | Golf club head |
Country Status (8)
Country | Link |
---|---|
US (1) | US5316298A (en) |
EP (1) | EP0594812B1 (en) |
JP (1) | JP2661796B2 (en) |
AU (1) | AU660797B2 (en) |
CA (1) | CA2108758C (en) |
DE (2) | DE69300223T2 (en) |
FR (1) | FR2689771B1 (en) |
WO (1) | WO1993020904A1 (en) |
Families Citing this family (154)
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US5626530A (en) * | 1992-08-05 | 1997-05-06 | Callaway Golf Company | Golf club head with sole bevel indicia |
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US5588923A (en) * | 1992-08-05 | 1996-12-31 | Callaway Golf Company | Golf club head with attached selected swing weight composite |
JP2526923Y2 (en) * | 1992-09-22 | 1997-02-26 | 住友ゴム工業株式会社 | Golf club head |
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US5800282A (en) * | 1995-07-17 | 1998-09-01 | Roger Cleveland Golf Company, Inc. | Set of iron-type golf club heads |
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US5707302A (en) * | 1996-02-29 | 1998-01-13 | Leon; Joseph A. | Iron-style golf club |
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1992
- 1992-04-14 FR FR9204882A patent/FR2689771B1/en not_active Expired - Lifetime
-
1993
- 1993-04-14 DE DE69300223T patent/DE69300223T2/en not_active Expired - Lifetime
- 1993-04-14 AU AU39576/93A patent/AU660797B2/en not_active Expired
- 1993-04-14 EP EP93909021A patent/EP0594812B1/en not_active Expired - Lifetime
- 1993-04-14 CA CA002108758A patent/CA2108758C/en not_active Expired - Lifetime
- 1993-04-14 US US08/045,784 patent/US5316298A/en not_active Expired - Lifetime
- 1993-04-14 JP JP5518056A patent/JP2661796B2/en not_active Expired - Lifetime
- 1993-04-14 DE DE0594812T patent/DE594812T1/en active Pending
- 1993-04-14 WO PCT/FR1993/000369 patent/WO1993020904A1/en active IP Right Grant
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Also Published As
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CA2108758C (en) | 2004-11-30 |
US5316298A (en) | 1994-05-31 |
DE69300223D1 (en) | 1995-08-03 |
EP0594812B1 (en) | 1995-06-28 |
AU660797B2 (en) | 1995-07-06 |
CA2108758A1 (en) | 1993-10-15 |
AU3957693A (en) | 1993-11-18 |
JP2661796B2 (en) | 1997-10-08 |
FR2689771B1 (en) | 1994-06-03 |
DE594812T1 (en) | 1995-04-06 |
FR2689771A1 (en) | 1993-10-15 |
JPH06510689A (en) | 1994-12-01 |
WO1993020904A1 (en) | 1993-10-28 |
DE69300223T2 (en) | 1995-11-02 |
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