EP1557203B1 - Raquette pour jeux de balle et méthode de fabrication - Google Patents

Raquette pour jeux de balle et méthode de fabrication Download PDF

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Publication number
EP1557203B1
EP1557203B1 EP04030147A EP04030147A EP1557203B1 EP 1557203 B1 EP1557203 B1 EP 1557203B1 EP 04030147 A EP04030147 A EP 04030147A EP 04030147 A EP04030147 A EP 04030147A EP 1557203 B1 EP1557203 B1 EP 1557203B1
Authority
EP
European Patent Office
Prior art keywords
racket
opening
clock
frame profile
frame
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.)
Not-in-force
Application number
EP04030147A
Other languages
German (de)
English (en)
Other versions
EP1557203A2 (fr
EP1557203A3 (fr
Inventor
Johannes Mauser
Klaus Rambach
Manfred Emberger
Johan Kotze
Herfried Lammer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Head Technology GmbH
Original Assignee
Head Technology GmbH
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 Head Technology GmbH filed Critical Head Technology GmbH
Publication of EP1557203A2 publication Critical patent/EP1557203A2/fr
Publication of EP1557203A3 publication Critical patent/EP1557203A3/fr
Application granted granted Critical
Publication of EP1557203B1 publication Critical patent/EP1557203B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/022—String guides on frames, e.g. grommets
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/028—Means for achieving greater mobility of the string bed
    • 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
    • A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and 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
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/10—Reinforcements for stringing
    • 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
    • A63B60/50—Details or accessories of golf clubs, bats, rackets or the like with through-holes
    • 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

Definitions

  • the present invention relates to a racket for ball games, in particular a tennis, squash, badminton, racquetball or paddle tennis racket with excellent handling characteristics, as well as a manufacturing method for such a racket.
  • Such clubs typically include a frame that forms a club head and a handle portion connected thereto.
  • a so-called heart region is formed in the transition region between the club head and the grip section.
  • the frame is formed of a frame profile or hollow profile, which is often made of a carbon fiber reinforced plastic material in a molding press.
  • the club head of the racket defines a clothing plane in which the clothing of the racket is placed. To accommodate the strings of the covering lying through holes are provided on the frame in the stringing level for the performance of stringed strings.
  • US-A-3,917,267 discloses a tennis racket formed from a frame having a substantially square club head and a handle portion projecting therefrom.
  • the racket is covered such that each string length spanning the club head is perpendicular to the side members of the square club head to provide a ball striking surface in which the strings are each of equal length and tension.
  • To reduce weight and to reduce the wind resistance may be provided in the corners of the club head openings in the frame.
  • DE-A-39 10 890 describes a racquet with a frame body having a head, a neck and a shaft.
  • a gap between two opposing legs of the frame body is spanned by a neck bridge, which encloses a clothing surface together with the head.
  • the neck bridge has an upper bridge portion and a lower bridge portion which extend substantially transverse to the longitudinal axis of the racquet and are spaced apart longitudinally of the racquet so as to define a slot therebetween.
  • a damping body of vibration-absorbing material is arranged between the two bridge parts.
  • FR-A-821 471 and US-A-3,647,211 disclose a racket with a club head and a handle portion connected thereto in which recesses are provided.
  • US 5,188,360 discloses a racket with a club head carrying the clothing and a racket handle.
  • the frame section forming the club head has at least one opening which runs perpendicular to the clothing plane.
  • At least one elastic counterweight may be releasably fixed in the opening to affect the weight distribution of the racket.
  • the counterweight has a plurality of through holes to receive the strings of the string.
  • the present invention has for its object to improve a racket of the type mentioned in terms of its handling characteristics, in particular its ball guide, while allowing a lightweight construction is possible.
  • This object is achieved with a racket having the features of independent claim 1.
  • the independent method claim 12 relates to a manufacturing method for such a racket.
  • the dependent claims relate to advantageous embodiments of the method according to the invention.
  • the racquet for ball games according to the invention has a frame formed from a frame or hollow profile, which has a club head and a preferably connected thereto via a heart region grip portion.
  • the clubhead defines a stringing plane.
  • the frame profile has at least one opening which extends through the frame profile and which extends substantially perpendicular to the clothing plane of the racket.
  • the opening extends in the frame profile of the racket according to the invention substantially perpendicular to the frame profile usually provided through holes for the implementation of stringed strings.
  • the opening may be arranged such that it is arranged in the region between two adjacent passage holes for the strings. However, it may also be advantageous to provide the opening in the region of a passage hole for the string, as this, for example, a cover of the opening by the string and / or an eyelet (“Grommet”) can be fixed for the string.
  • the head shape of the racket is largely arbitrary and may for example be oval, egg-shaped, teardrop-shaped, rectangular with rounded corners.
  • a dial of a watch is usually used, the 12 o'clock position being located at the extreme or free end of the club head (cf. Fig. 1a ). Accordingly, the 3 o'clock or 9 o'clock position is approximately in the middle of the total length of the club head.
  • the openings are provided in pairs substantially symmetrical to the longitudinal axis of the racket, ie, two, four, six or more openings may be provided symmetrically to the longitudinal axis of the racket.
  • the at least one opening is in the range between 2 o'clock and 4 o'clock and / or between 8 o'clock and 10 o'clock Clock on the clubhead. Particularly preferred is the paired arrangement of openings in this area. More preferably, at least one pair of apertures are provided at about 3 o'clock and 9 o'clock respectively at the club head. Furthermore, it may be advantageous to provide a plurality of openings on each side.
  • a plurality of openings could be arranged symmetrically about the 3 o'clock or 9 o'clock position or, starting from 3 o'clock or 9 o'clock towards the gripping portion or starting from 3 o'clock or 9 o'clock toward the free end of the clubhead.
  • the opening provided perpendicular to the clothing plane extends completely through the frame profile, i. in the case of a hollow profile, a first hole is provided on a first racket side and in alignment therewith a second hole is provided on the opposite second racket side, which together form the opening.
  • the opening is preferably formed after the forming of the racket in the molding press subsequently to the frame, but it can also be made during the molding process, for example by inserting a core into the mold.
  • the subsequent formation of the mold is preferably carried out by drilling, milling or sawing.
  • the cross section of the opening is circularly cylindrical.
  • the circular opening preferably has a diameter in the range between about 2 mm and 8 mm, more preferably between 3 mm and 6 mm.
  • each of the holes is preferably formed in the direction of bow parallel to the clothing plane substantially arcuate or trough-shaped. However, any other shape for the holes is possible.
  • the depth of each hole is at least the wall thickness of the frame profile.
  • the dimensions of the hole should be chosen so that the hole does not reach to a provided in the frame groove for receiving a headband.
  • the opening In order to prevent the ingress of dirt and / or moisture into the frame profile, it is preferred to provide the opening with a substantially tubular insert, so that the frame profile is closed inwards.
  • This tubular insert is usually made of an elastic material (e.g., rubber) so that the beneficial effects of providing the apertures are minimally affected. It is also possible to cover each of the openings forming the opening with a separate cover made of an elastic material, whereby the same effect is achieved.
  • reinforcing layers of carbon fiber, glass or aramid fabric and / or a unidirectional prepreg are suitable, which are arranged at an angle of ⁇ 45 ° to the longitudinal extent of the frame profile (i.e., helically in the wall of the frame profile).
  • the effect of the apertures perpendicular to the clothing plane is, in particular, that during a stroke, the bat has a relatively stiff characteristic at the moment of batting, whereby the ball can be given excellent acceleration, while after the ball has left the bat, the bat is more likely to do so soft or damped characteristic has.
  • the effect according to the invention can be further enhanced by providing the frame profile in the region of the opening, preferably on both sides, with a trough-shaped indentation, the depth of which extends parallel to the opening.
  • a further advantage of the racket according to the invention lies in the fact that vibrations caused by the impact of the ball in the racket are conducted much less strongly to the handle than in the case of known rackets, which leads in particular to improved ball guidance during play and to improved damping of the racket. As a result, phenomena such as e.g. "Tennis elbow", minimized or prevented.
  • FIG. 1a shown schematic representation of the racket 2 according to the invention includes for better understanding a Ziffemblatt corresponding to a normal clock, wherein the 12 o'clock position (XII) is provided at the extreme, free end of the racket.
  • the racket according to the invention has a frame 4 which forms a racket head 6 and a handle section 10 preferably connected thereto via a heart area 8.
  • the frame 4 is formed from a frame or hollow profile (see Figures 2d and 3a-3c ).
  • the club head defines a clothing plane of the racket.
  • the frame 4 in the region of the club head 6 has a plurality of substantially in the clothing plane through holes (not shown) for the implementation of stringed strings 7, of which in cross-section Fig. 3a a schematic can be seen.
  • Fig. 1a On the frame profile is in accordance with the in Fig. 1a illustrated embodiment at 3 o'clock or 9 o'clock each one extending through the frame profile extending opening 12 which extends substantially perpendicular to the clothing plane or to the through holes for the stringed strings.
  • This opening is as in Fig. 2a shown closer, formed in the form of a substantially circular cylindrical through hole.
  • the bore extends through the two opposite walls of the frame profile and thereby forms the opening 12 extending through the frame profile.
  • the circular opening 12 preferably has a diameter D in the range between about 2 mm and 8 mm, more preferably between 3 mm and 6 mm, up.
  • an insert 14 is preferably provided in the opening 12, which terminates the frame profile to the interior of the opening 12.
  • the insert 14 is preferably tubular, ie formed with a through hole 16. However, it can also be designed as a "lid” or as a solid profile.
  • the insert 14 is typically made of a soft material so that it does not significantly affect the properties of the racquet in this area. Preferably, a transparent plastic (eg rubber) is used for this purpose.
  • the tubular insert 14 preferably has a small wall thickness of, for example, about 0.5 to 1.5 mm, preferably about 0.5 to 1 mm.
  • Fig. 3b is a cross section of the racket according to the invention without an insert shown.
  • the bat according to the invention in the region of the opening 12 may have a trough-shaped recess 18.
  • the frame has on the two opposite sides of the frame 4 each such indentation 18, that is, the frame height is reduced in this area by twice the amount of each trough-shaped indentation 18.
  • the racket according to the invention has four such trough-shaped recesses 18, ie two opposite each opening 12.
  • the opening 12 and optionally the associated indentation (s) 18 are in the range between 2 o'clock and 4 o'clock or between 8 o'clock and 10 o'clock on the racket.
  • each opening 12 is provided at about 3 o'clock and 9 o'clock on the frame 4. In this case, it is preferable to provide a trough-shaped indentation 18 each at 3 o'clock or 9 o'clock respectively at the front and the back of the racket.
  • the trough-shaped indentation is preferably formed during molding of the racket frame in the frame profile, for example by providing a corresponding bulge in the mold. Furthermore, it may be preferable, in the region of the opening 12 - regardless of whether or not there is a recess 18 - provide one or more reinforcement layers in the material forming the frame profile. For example, carbon fiber material, glass or aramid fabric and / or a unidirectional prepreg at an angle of ⁇ 45 ° to the longitudinal frame extension of the frame profile (ie helically in the wall of the frame profile) are incorporated into the racket frame forming frame profile. This is preferably done by superimposing the different layers of frame material and reinforcing material and then rolling the superimposed materials into a "tube", which is then inserted into the molding press and pressed under the action of temperature and pressure to the frame.
  • FIG. 2b and 2c illustrated embodiments instead of a through hole through the frame profile at the front and back of the frame each provide individual holes 12a.
  • FIG. 2b and 2c For example, only one such hole 12a can be seen, while a corresponding hole provided on the opposite frame side is not shown. Two opposite holes 12a together form an opening extending through the frame profile.
  • the holes 12a have a substantially arcuate or trough-shaped in the viewing direction parallel to the clothing plane. This can be realized for example by milling or sawing.
  • the length L of the holes 12a along the frame is preferably in the range between 1 mm and 10 mm, more preferably between 3 mm and 7 mm.
  • the largest depth T of a hole 12a corresponds at least to the wall thickness of the frame profile, so that the frame profile is at least partially completely removed to expose an opening in the interior of the frame profile.
  • the maximum depth of the hole 12a is preferably the depth up to a groove 20 (FIG. Fig.
  • the width B of the hole 12a is preferably in the range between 3 mm and 7 mm.
  • a (preferably substantially tubular) insert or cover the shape of which may be adapted to the shape of the hole or trough so that neither dirt nor moisture in the interior of the frame profile can get.
  • FIG. 2d and 3c Another racket is shown similar to the one in the Fig. 2 b and 2c illustrated embodiments.
  • the opposite holes 12a, which together form the opening, here have a substantially rectangular cross-section when viewed parallel to the clothing plane.
  • openings 12 along the frame, each extending substantially perpendicular to the clothing plane of the racket.
  • several openings could be arranged symmetrically at 3 o'clock or 9 o'clock or, starting from 3 o'clock or 9 o'clock towards the handle section or starting from 3 o'clock or 9 o'clock toward the free end of the club head.
  • the racket according to the invention is particularly advantageous in terms of its improved ball guidance.
  • vibrations that occur when hitting the ball derived less to the handle than known rackets.
  • the acceleration capacity that can be transferred to the ball with the racket according to the invention is improved.
  • the advantageous properties of the racket according to the invention are presumably due to the fact that the outermost wall of the frame profile, i. the part of the wall of the frame profile furthest from the clothing plane, is weakened by the opening in the range between 2 o'clock and 4 o'clock or between 8 o'clock and 10 o'clock, so that here the bending resistance moment of the frame profile is considerably lower than in the Areas without opening.
  • the racket By means of the opening (s) provided on the frame, in particular in the case of two openings provided symmetrically to the longitudinal axis of the racket, a kind of "control point" is created in the area of the openings.
  • the racket can be particularly flexible, whereby the particularly advantageous effects are achieved.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Laminated Bodies (AREA)
  • Golf Clubs (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)

Claims (16)

  1. Raquette pour jeux de balle avec un cadre (4) présentant une tête de raquette (6) et une section de poignée (10) reliée à celle-ci, qui est formé par un profil de cadre creux, où la tête de raquette (6) définit un plan pour mettre les cordes, et le profil de cadre présente au moins une ouverture (12) s'étendant à travers le profil de cadre, qui s'étend sensiblement perpendiculairement au plan pour mettre les cordes de la raquette (2), où ladite au moins une ouverture (12) est prévue dans la zone entre 2 heures et 4 heures et/ou entre 8 heures et 10 heures à la tête de raquette (6), caractérisé en ce que ladite au moins une ouverture (12) sous la forme de deux trous opposés (12a) est réalisée comme perçage traversant cylindrique circulaire dans le profil de cadre creux, et en ce que le diamètre (D) du perçage traversant se situe dans la plage entre 2 mm et 8 mm.
  2. Raquette selon la revendication 1, où sont prévus au cadre (4) plusieurs trous traversants situés sensiblement dans le plan pour mettre les cordes pour le passage des cordes.
  3. Raquette selon la revendication 1 ou 2, où au moins deux ouvertures (12) sont prévues sensiblement d'une manière symétrique à l'axe longitudinal de la raquette (2).
  4. Raquette selon l'une des revendications 1 à 3, où ladite au moins une ouverture (12) est prévue environ à 3 heures et/ou environ à 9 heures à la tête de raquette (6).
  5. Raquette selon l'une des revendications 1 à 4, où le diamètre (D) du perçage traversant se situe dans la plage entre 3 mm et 6 mm.
  6. Raquette selon l'une des revendications 1 à 5, où chacun des trous (12a), lorsqu'on regarde dans le plan pour mettre les cordes, est réalisé sensiblement en forme de creux.
  7. Raquette selon l'une des revendications 1 à 6, où dans ladite au moins une ouverture (12), un insert sensiblement tubulaire (14) est prévu pour fermer le profil de cadre vers l'intérieur.
  8. Raquette selon l'une des revendications 1 à 7, où le profil de cadre présente dans la zone autour de ladite au moins une ouverture (12) une ou plusieurs couches de renforcement.
  9. Raquette selon la revendication 8, où la couche de renforcement présente un tissu en fibres de carbone, en verre ou en aramide et/ou un pré-imprégne unidirectionnel et est disposée selon ±45° relativement à l'extension du cadre.
  10. Raquette selon l'une des revendications 1 à 9, où est réalisé dans la zone de l'ouverture (12) un enfoncement en forme de creux (18) dans le profil de cadre.
  11. Raquette selon la revendication 10, où par ouverture (12), deux enfoncements en forme de creux opposés (18) sont réalisés dans le profil de cadre.
  12. Procédé de fabrication d'une raquette, en particulier selon l'une des revendications 1 à 11, comprenant les étapes consistant à :
    a) réaliser un cadre (4) constitué d'un profil de cadre creux qui présente une tête de raquette (6) et une section de poignée (10) reliée à celle-ci ; et
    b) prévoir au moins une ouverture (12) s'étendant à travers le profil de cadre d'une manière sensiblement perpendiculaire à un plan pour mettre des cordes formé par la tête de raquette (6), où ladite au moins une ouverture (12) est prévue dans la zone entre 2 heures et 4 heures et/ou entre 8 heures et 10 heures à la tête de raquette (6) et où ladite au moins une ouverture (12) sous la forme de deux trous opposés (12a) est réalisée comme perçage traversant cylindrique circulaire dans le profil de cadre creux, le diamètre (D) du perçage traversant se situant dans la plage entre 2 mm et 8 mm.
  13. Procédé selon la revendication 12, où au moins deux ouvertures (12) sont prévues d'une manière sensiblement symétrique à l'axe longitudinal de la raquette (2).
  14. Procédé selon la revendication 12 ou 13, où ladite au moins une ouverture (12) est alésée, fraisée ou sciée dans le profil de cadre.
  15. Procédé selon l'une des revendications 12 à 14, où dans ladite au moins une ouverture (12), un insert sensiblement tubulaire (14) est inséré pour fermer le profil de cadre vers l'intérieur.
  16. Procédé selon l'une des revendications 12 à 15, où lors de la réalisation du profil de cadre, dans la zone autour de ladite au moins une ouverture (12), une ou plusieurs couches de renforcement sont prévues.
EP04030147A 2004-01-23 2004-12-20 Raquette pour jeux de balle et méthode de fabrication Not-in-force EP1557203B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004003528A DE102004003528B3 (de) 2004-01-23 2004-01-23 Schläger für Ballspiele und Herstellungsverfahren
DE102004003528 2004-01-23

Publications (3)

Publication Number Publication Date
EP1557203A2 EP1557203A2 (fr) 2005-07-27
EP1557203A3 EP1557203A3 (fr) 2005-10-05
EP1557203B1 true EP1557203B1 (fr) 2009-11-11

Family

ID=34625783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04030147A Not-in-force EP1557203B1 (fr) 2004-01-23 2004-12-20 Raquette pour jeux de balle et méthode de fabrication

Country Status (6)

Country Link
US (1) US7044869B2 (fr)
EP (1) EP1557203B1 (fr)
CN (1) CN100518864C (fr)
AT (1) ATE448007T1 (fr)
DE (2) DE102004003528B3 (fr)
TW (1) TWI343268B (fr)

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DE102004003526B3 (de) * 2004-01-23 2005-09-22 Head Technology Gmbh Schläger für Ballspiele und Herstellungsverfahren
DE102004003528B3 (de) * 2004-01-23 2005-07-21 Head Technology Gmbh Schläger für Ballspiele und Herstellungsverfahren
DE102006004863B4 (de) * 2006-02-02 2007-12-27 Head Technology Gmbh Schläger für Ballspiele
EP1981600A2 (fr) 2006-02-02 2008-10-22 Head Technology GmbH Raquette
DE102006004849B4 (de) * 2006-02-02 2008-01-03 Head Technology Gmbh Ballspielschläger mit Schwingungseinrichtung
US20080254921A1 (en) * 2007-04-12 2008-10-16 Chin-Dong Pai Racket frame
US8342989B2 (en) * 2008-11-14 2013-01-01 Head Technology Gmbh Sporting goods with graphene material
US12029951B2 (en) * 2017-12-14 2024-07-09 Bauer Hockey, Llc Hockey stick and blade for hockey stick
US12042706B2 (en) 2017-12-14 2024-07-23 Bauer Hockey, Llc Hockey stick with variable stiffness blade
US10751581B2 (en) 2018-03-12 2020-08-25 Wilson Sporting Goods Co. Racquet configured with increased flexibility in multiple directions with respect to a longitudinal axis

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EP0676222B1 (fr) * 1994-04-11 2000-06-28 Wavex Corporation Raquette avec cadre inégal
US6447412B1 (en) * 2000-04-18 2002-09-10 Ef Composite Technologies, L.P. Sports racket with undulations in frame interior surface
JP3416634B2 (ja) * 2000-09-21 2003-06-16 住友ゴム工業株式会社 ダイナミックダンパー
CN2519682Y (zh) * 2001-09-25 2002-11-06 厦门侨兴工业有限公司 球拍的断面结构
US6761651B2 (en) * 2002-11-22 2004-07-13 Chin-Dong Pai Aluminum tennis racket
DE102004003528B3 (de) * 2004-01-23 2005-07-21 Head Technology Gmbh Schläger für Ballspiele und Herstellungsverfahren
DE102004003526B3 (de) * 2004-01-23 2005-09-22 Head Technology Gmbh Schläger für Ballspiele und Herstellungsverfahren

Also Published As

Publication number Publication date
TWI343268B (en) 2011-06-11
EP1557203A2 (fr) 2005-07-27
EP1557203A3 (fr) 2005-10-05
US20050164813A1 (en) 2005-07-28
CN100518864C (zh) 2009-07-29
DE102004003528B3 (de) 2005-07-21
US7044869B2 (en) 2006-05-16
ATE448007T1 (de) 2009-11-15
CN1666796A (zh) 2005-09-14
DE502004010345D1 (de) 2009-12-24
TW200524658A (en) 2005-08-01

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