WO2002062428A1 - Serie de clubs de golf - Google Patents

Serie de clubs de golf Download PDF

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Publication number
WO2002062428A1
WO2002062428A1 PCT/FR2002/000481 FR0200481W WO02062428A1 WO 2002062428 A1 WO2002062428 A1 WO 2002062428A1 FR 0200481 W FR0200481 W FR 0200481W WO 02062428 A1 WO02062428 A1 WO 02062428A1
Authority
WO
WIPO (PCT)
Prior art keywords
recess
series
upper wall
head
golf clubs
Prior art date
Application number
PCT/FR2002/000481
Other languages
English (en)
French (fr)
Inventor
Jacques Fagot
Douglas E. Roberts
Lionel Poincenot
Original Assignee
Roger Cleveland Golf Company, Inc.
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 Roger Cleveland Golf Company, Inc. filed Critical Roger Cleveland Golf Company, Inc.
Priority to CA002434885A priority Critical patent/CA2434885A1/fr
Priority to KR10-2003-7009782A priority patent/KR20030074731A/ko
Priority to JP2002562433A priority patent/JP2004531298A/ja
Priority to AU2002237364A priority patent/AU2002237364B2/en
Publication of WO2002062428A1 publication Critical patent/WO2002062428A1/fr

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
    • A63B53/047—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
    • 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
    • A63B60/52—Details or accessories of golf clubs, bats, rackets or the like with slits
    • 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
    • A63B2053/0491—Heads with added weights, e.g. changeable, replaceable
    • 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
    • A63B53/0437—Heads with special crown configurations

Definitions

  • the invention relates to the field of golf. It relates more particularly to golf club heads of the "iron” type. It relates more specifically to irons having a rear cavity whose geometry ensures an optimization of the distribution of the mass while retaining excellent striking qualities.
  • iron the head of which is made of molded or forged metal
  • the iron heads all have a flat striking face whose inclination varies with the number of the iron in the series.
  • the irons of small number that is to say from 1 to 4 also called “long irons”
  • One of the objectives for improving the tolerance of an iron consists in distributing the weight of the head peripherally, around the center of the striking face.
  • the center of the striking face, corresponding to the ideal impact area, also called the “sweet spot”, is wider the more the weight distribution is peripheral.
  • the lower wall forms what is generally called "the sole", the lower face of which comes into view with the ground during striking.
  • the cavity is also delimited by an upper wall which the player has in his field of vision when he prepares the stroke and hits the ball.
  • the cavity is also delimited by two side walls, the first being located on the side of the head connecting to the handle, also called “heel”, the second wall being located on the opposite side, generally called "point”.
  • the set of walls delimiting the cavity is generally called “crown".
  • the peripheral shape of the crown distributes part of the mass of the head peripherally, which widens the "s eet spot '.' and therefore increases the precision tolerance.
  • the objective of the invention is to provide a golf club head which allows both to distribute the mass within the crown in favor of the bottom wall forming the sole, while retaining a good width. of sweet spot to ensure good tolerance. It is also important that this mass distribution is optimal for each of the irons in the series.
  • the invention therefore relates to a series of golf clubs of the "iron" type.
  • the rear face of each head has a cavity delimited by walls, namely at least one lower wall forming the sole and an upper wall.
  • the upper wall has several faces, namely a rear face, an upper face, a lower face which faces the cavity and the lateral faces.
  • several golf clubs in the series have a head which is characterized in that it has at least one recess produced in the upper wall, and opening onto a single face of said upper wall, outside the faces.
  • the upper wall delimiting the cavity is hollowed out to ensure a reduction in the weight in this upper part. Consequently, the mass distribution inside the crown favors the lower wall. By opening onto a single wall, the characteristic recesses do not weaken the crown.
  • the recesses made in the upper wall can lead to different places, with the exception of the upper face, so as not to appear in the player's field of vision, so as not to disturb him during the preparation and striking of the stroke.
  • the characteristic recess (s) can open either on the rear face of the upper wall, or even on a lateral face of this wall, that is to say on the lateral face of the head.
  • the opening of these recesses is located either at the rear of the head, or on one of these lateral sides.
  • the recess leads to a lateral face of the head, it will be preferred for manufacturing questions that it is the lateral face situated on the side of the point of the head.
  • the characteristic recesses can take a wide variety of shapes, as soon as they open onto a single face of the upper wall. So the recess can be lengthened in the main direction of the upper wall. In other words, when it comes to recesses opening onto the rear face of the upper wall, the opening of the recess has a larger dimension which is substantially parallel to the upper wall, or which matches its slight curvature when the latter is not straight.
  • the recess When the recess is made in such a way that it opens onto a lateral face of the club head, it is then hollowed out in the very thickness of the wall, parallel to the upper and lower faces of the upper wall, and also in parallel at the striking face.
  • the recess can be cylindrical, either when it opens onto the rear face of the upper wall or onto a side wall of the latter.
  • it can for example be produced by machining by milling, by drilling or even directly by injection.
  • the recess is filled with a low density material, such as for example a polyurethane foam. , so as to prevent the intrusion of foreign bodies.
  • the filling material is chosen so as to only imperceptibly modify the mass distribution.
  • the volume of the recess represents between 0.4% and 5% of the volume of the head.
  • volume of the recess is meant the volume of material which it is necessary to introduce into the recesses so that the upper wall has a regular external shape. This corresponds to the volume which is removed from the upper wall and transferred to the lower wall in order to lower the center of gravity of the head.
  • the player has a series of irons with different characteristics.
  • long irons numbered 1 to 4, intended for long distance shots, intermediate irons numbered 5 to 7, and short irons, numbered 8, 9 and PW, intended for precision shots.
  • the volume of the recess (s) and / or their position inside the upper wall of the head is variable from one club to another, so as to make vary the position of the center of gravity of the head, from one club to another. This variation of this or that geometric criterion is done with a progression in the same direction within, the series.
  • the distance separating the recess (s) from the neck can be increasing or decreasing with the club number.
  • distance of the recesses relative to the neck is meant the distance of the barycenter (or center of gravity) of the recess or of all of the recesses relative to the axis of the handle.
  • this distance increases with the club number.
  • the distance between the club handle and the characteristic recess increases from long irons to short irons. Thanks to this progression, and at a constant recess volume, the shortest irons have a lower moment of inertia relative to the axis of the handle.
  • this distance can be decreasing with the club number.
  • the distance between the club handle and the characteristic recess increases from long irons to short irons. Thanks to this increase, and at a constant recess volume, the longest irons have a lower center of gravity compared to short irons, due to the inclination from bottom to top, from the neck, of the upper wall. of the head.
  • the volume of all of the recesses can be either increasing or decreasing with the number of the club.
  • the total volume of the recesses varies between long bars and short bars.
  • the variation of this volume can be effected in particular by a variation in the depth of the recesses or even by an increase in their opening on the face of the wall towards which they open.
  • this recess may be more or less deep.
  • the latter may be in decreasing number with the number of the club in the series. In other words, the number of recesses decreases from long irons to short irons.
  • the distance of the recesses relative to the upper face of the upper wall which is variable within the series.
  • the recesses can be higher or lower in the upper wall, so as to influence the position of the center of gravity.
  • FIG. 1 is a rear view of a head of golf club produced according to a first variant.
  • Figure 2 is a sectional view of Figure 1 along the plane II-IT.
  • Figure 3 is a top view of the head of Figure 1.
  • Figure 4 is a rear view of a head made according to a second alternative embodiment.
  • Figure 5 is a rear view of a head made according to a third alternative embodiment.
  • FIG. 6 is a right side view of FIG. 5.
  • FIG. 7 is a top view of FIG. 5.
  • FIGS. 8a, 8b and 8c are rear views of three heads from the same series of clubs, with different numbers.
  • Figures 9a, 9b and 9c are rear views of three heads belonging to a second series of clubs.
  • Figures 10a, 10b and 10c are a rear view of three heads belonging to a third series of clubs according to the invention.
  • the invention relates to a golf club head of the "iron” type.
  • a head (1) comprises a neck (2) intended to be connected to the handle, and a striking face (3) on which the impact with the ball takes place.
  • the head (1) comprises a cavity (4) whose bottom (5) is located behind the striking face (3). This cavity (4) is literally delimited by a crown (6) made up of different walls.
  • this crown (6) comprises a lower wall (7) forming the sole of the head and the lower face (8) of which looks at the ground at the time of impact.
  • the crown (6) also comprises two side walls (9, 10) whose inner faces (11, 12) are directed towards the cavity (4).
  • the crown (6) also includes an upper wall (13).
  • This upper wall (13) has several faces, namely: an upper face (14) located in the player's field of vision when the latter strikes the ball, a lower face (15) oriented towards the cavity (4) , a rear face (16) substantially parallel to the striking face and oriented towards the rear of the head, side faces (17, 18) located at the border with the side walls (9, 10).
  • the upper wall (13) has one or more recesses hollowed out in its thickness.
  • these recesses (20-23) open onto the rear face (16) of the upper wall (13).
  • These recesses (20-23) have an elongated shape, along the large dimension of the upper wall (13), that is to say in a substantially horizontal direction.
  • a recess (21) has a width i in the main direction of the wall of the upper (13) and a height h measured perpendicular to this direction.
  • each recess (20-23) is hollowed out inside the upper wall (13) of a depth p, which can represent 10 to 90% of the thickness e of the wall in the area considered.
  • the combination of the three parameters width l, height h and depth p substantially determines the volume of the recess. Depending on the quantity of material to be removed, this volume can be adjusted by varying each of these parameters i, h, p.
  • each of these recesses (20-23) can be adapted to optimize the weight reduction of the upper wall (13), in order to modify the distribution of mass inside the crown (6 ).
  • the amount of material removed to form all of the recesses is of the order of 0.8 to 2 grams
  • the shape of the recesses is also not limited to this shape illustrated in FIG. 1, but also covers the variant illustrated in FIG. 4 in which the recesses (30) are substantially cylindrical, and for example produced by drilling.
  • each recess can take other forms such as elliptical, conical or other.
  • the recesses made in this way in the upper wall (13) reduce its mass, and modify the position of the center of gravity relative to the axis (19) of the handle and / or relative to the base (8) of the sole (7). It follows a variation of the inertia compared to the axis of the handle which causes an increase in the power of the blow. There is also an improvement in the trajectory with the variation in height of the center of gravity.
  • the characteristic recesses can be produced according to other variants such as those illustrated in FIGS. 5 to 7.
  • the recess (33) illustrated in FIG. 5 opens laterally on the lateral face (17) of the wall upper (13).
  • the opening (34) of the recess (33) is circular when viewed along the axis (35) of the recess.
  • This recess (33) can be produced by drilling or milling. It is advantageously cylindrical for manufacturing reasons, but it could also adopt a different shape.
  • the influence of the recess (33) can be adapted by modifying its volume and therefore the quantity of material removed from the upper wall (13). More precisely, the volume of the recess (33) essentially depends on its length L and on the surface, on its opening (34), that is to say on its diameter. The position of the recess (33) inside the upper wall can also be slightly modified. Thus, this recess (33) can be more or less close to the striking face (3) and the lower face (15) of the upper wall (13).
  • the length of the recess (33) can be between 10 and 90% of the total length of the upper wall (13). Its diameter is of the order of 3 millimeters.
  • the characteristic recesses are different from one club to another within the same series.
  • the number of recesses can be variable within the series itself.
  • the head (40) corresponding to a long iron of number 2 has five recesses (41-45) made in its upper wall (13). It will be noted in passing that these different recesses have different lengths.
  • the intermediate club is such that club number 5 (46) illustrated in FIG. 8b born has only three recesses (47, 48, 49). These recesses (47-49) can be identical to the recesses (41, 42, 43) of club number 2, but they can also be different.
  • the barycenter of the three recesses (47, 48, 49) is in substantially the same position relative to the upper wall (13) as the barycenter of the recesses (41-45) of club number 2 (40) in FIG. 8a.
  • the incidence of the reduction in the number of recesses between the iron number 2 and the iron number 5 only results in a displacement of the center of gravity (G40, G46) upwards, in a substantially vertical direction.
  • the centers of gravity (G46, G40) illustrated in FIGS. 8b are not shown exactly, but simply by way of illustration.
  • club number 9 (50) illustrated in FIG. 8c has only one recess (51).
  • This recess (51) has a barycenter which is in the same position relative to the upper wall (13) as the barycenters of the recesses of clubs number 2 and (40), and number 5 (46). In this way, the center of gravity (G50) of the head number 9 is moved substantially vertically relative to the centers of gravity G46 and G40 of the clubs (40, 46).
  • (41-45; 47-49, 51) may vary from one club to another in the same series or may be substantially identical for certain clubs with consecutive numbers.
  • FIG. 9a illustrates another alternative embodiment of a series of clubs.
  • the club (53) illustrated in FIG. 9a is a long iron such as a number 2 iron. It has a recess (54) which is located rather in the direction of the heel of the head.
  • d2 the distance separating the axis of the handle (55) from the barycenter (56) from the recess (54).
  • the distance d5 separating the center of gravity (59 ) of this recess of the axis (55) of the handle is greater than the distance d2 calculated for club number 2. It follows that the center of gravity G57 of the head (57) approaches the axis of the handle (55) in relation to the center of gravity G53 of club number 2. De more, the displacement of this center of gravity takes place upward, because due to the inclination of the upper wall (13), the recess (58) is located higher than the recess (54).
  • the club number 9 whose head (60) is illustrated in FIG. 9c has a recess (61) of the same volume as the recesses (56, 58) of the irons number 2 and 5.
  • the distance d9 separating the barycenter (62) of this obviously (61) of the axis (55) is greater than the distance d5 measured on club number 5. It follows that the center of gravity G60 of the head of club number 9 is moved horizontally towards the heel with respect to the center of gravity G57 and G53.
  • FIG. 10a to 10c Another way to vary the position of the center of gravity of the different clubs within a series is illustrated in Figures 10a to 10c. More specifically, the head of the number 2 iron (65) has five recesses (66-70) which are distributed over the entire upper wall (13) of the head (65). By comparison, the head (71) of club number 5 also has five recesses (72-76), also distributed on the upper wall (13). Each of these recesses (72-76) has a volume slightly smaller than the corresponding recesses (66-70) of the head (65). Consequently, the overall volume of all the recesses is lower on iron number 5 compared to iron number 2. It follows that the center of gravity G65 of the head of club number 2 is arranged below the center of gravity G71 of club number 5.
  • the head (77) of club number 2 has five recesses
  • Each of these recesses (78-82) has a volume lower than the recesses of the clubs of lower numbers, which results in a higher position of the center of gravity G77 relative to the center of gravity G71, G65 of the clubs of lower numbers.
  • club heads according to the invention have the advantage of allowing a distribution of the mass of the crown of the head adapted for each of the irons of the series to optimize its performance, while maintaining a good rigidity of the latter.
PCT/FR2002/000481 2001-02-07 2002-02-07 Serie de clubs de golf WO2002062428A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002434885A CA2434885A1 (fr) 2001-02-07 2002-02-07 Serie de clubs de golf
KR10-2003-7009782A KR20030074731A (ko) 2001-02-07 2002-02-07 골프클럽 세트
JP2002562433A JP2004531298A (ja) 2001-02-07 2002-02-07 ゴルフクラブセット
AU2002237364A AU2002237364B2 (en) 2001-02-07 2002-02-07 Set of golf clubs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0101612A FR2820330B1 (fr) 2001-02-07 2001-02-07 Tete de club de golf
FR01/01612 2001-02-07

Publications (1)

Publication Number Publication Date
WO2002062428A1 true WO2002062428A1 (fr) 2002-08-15

Family

ID=8859698

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2002/000481 WO2002062428A1 (fr) 2001-02-07 2002-02-07 Serie de clubs de golf

Country Status (10)

Country Link
US (3) US20020107087A1 (zh)
EP (1) EP1230955A1 (zh)
JP (1) JP2004531298A (zh)
KR (1) KR20030074731A (zh)
CN (1) CN1239216C (zh)
AU (1) AU2002237364B2 (zh)
CA (1) CA2434885A1 (zh)
FR (1) FR2820330B1 (zh)
TW (1) TWI230083B (zh)
WO (1) WO2002062428A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004337608A (ja) * 2003-05-12 2004-12-02 Taylor Made Golf Co Inc アイアンタイプのゴルフ・クラブ・ヘッドおよびその製造方法

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