EP0241393A1 - Device for damping the vibrations of racket strings - Google Patents

Device for damping the vibrations of racket strings Download PDF

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Publication number
EP0241393A1
EP0241393A1 EP87420093A EP87420093A EP0241393A1 EP 0241393 A1 EP0241393 A1 EP 0241393A1 EP 87420093 A EP87420093 A EP 87420093A EP 87420093 A EP87420093 A EP 87420093A EP 0241393 A1 EP0241393 A1 EP 0241393A1
Authority
EP
European Patent Office
Prior art keywords
membrane
rope
damping
racket
vibrations
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
Application number
EP87420093A
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German (de)
French (fr)
Other versions
EP0241393B1 (en
Inventor
Dominique Deville
Gilles Du Gardin
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.)
Skis Rossignol SA
Original Assignee
Skis Rossignol SA
Rossignol SA
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Publication date
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Application filed by Skis Rossignol SA, Rossignol SA filed Critical Skis Rossignol SA
Publication of EP0241393A1 publication Critical patent/EP0241393A1/en
Application granted granted Critical
Publication of EP0241393B1 publication Critical patent/EP0241393B1/en
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
    • 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
    • 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

Definitions

  • the present invention relates to a device for damping the vibrations of the stringing of a racket, such as a tennis, squash, badminton, or other racket, more particularly intended for damping the vibrations of the strings.
  • a tennis racket or other generally consists of a handle held by the player, extended by a frame called basket, of round or oval shape for example, itself carrying the sieve composed of longitudinal strings and transverse strings, forming the striking surface.
  • Each rope generally crosses the frame right through, passing inside a hole provided for this purpose.
  • the base of the basket located near the handle, generally forms a "bridge" supporting the central longitudinal cords.
  • the subject of the invention is a device for damping the vibrations of the stringing of a racket and the noise which results thereby making it possible to overcome this drawback. It is constituted by at least one flexible annular membrane, pierced with an orifice of diameter smaller than that of the rope, and fixed respectively in one of the holes of at least the lower part of the basket, or bridge, holes intended for each to deliver passage to the rope.
  • the flexible annular membrane is fixed in a tubular piece, called a barrel or an eyelet, itself passing through the bore and serving as a passage for the rope.
  • This tubular part is, in a manner known per se, intended to avoid cutting the rope.
  • a tennis racket 1 is composed of a handle 2, two branches 2b, extended by a basket 3, the lower part 4 of which forms a "bridge ".
  • the frame 3 itself carries the "sieve” 5, composed of longitudinal strings 6 and transverse strings 7, forming the striking surface.
  • each rope is fixed to the basket 3 by passing through holes 8 in this frame, and more precisely in tubular parts 9, or “barrels", or eyelets, in polyamide for example, fixed in these holes.
  • a flexible annular membrane 10, made of elastomer for example is attached, glued or force fitted, in the barrels 9 relating to the longitudinal ropes 6, and at least in the central part of the bridge 4.
  • all the barrels 9 relating to the longitudinal strings 6, whatever they are, are each fitted with a membrane 10.
  • each membrane 10 is of smaller diameter than that of the cord. It is therefore strongly pinched by the membrane.
  • each membrane 10 is fixed towards the end of the barrel 9, that is to say of the bore 8, situated towards the inside of the basket 3.
  • each membrane 10 can be produced at the same time as the associated barrel 9, by bi-injection, overmolding or any other process.
  • barrels 9 could be absent, in which case each membrane would be fixed directly in the corresponding bore 8, which would then have the same internal diameter as the barrel 9.
  • the barrels 9, each equipped with their membrane 10, can be produced individually, but, as shown in FIG. 2, they can also be produced in a single molding piece in groups of two or more.
  • the bridge 4 is equipped, in its main central part with four rope jumpers 11, molded in one piece and shaped as shown to allow passage to the longitudinal rope.
  • both the transverse and longitudinal strings stretched along the lateral parts of the basket 3 pass through successive barrels 9 which are formed by molding in one piece with a common strip 12, carrying said barrels, and fixed, as shown in a groove 13 in the outer part of the basket 3.
  • FIG. 4 shows a barrel 9, equipped with its membrane 10, before passage of the associated cord.
  • the membrane 10 may have not J conical double-entry.
  • FIG. 5 shows the same barrel 9, after passage and tension of the longitudinal rope 6. It can be seen that the membrane 10 is strongly deformed towards the inside of the racket and that, the central orifice 14 having been greatly enlarged by force by the passage of the cord 6, a permanent contact zone has been created between the membrane and the cord.
  • the invention is of course not limited to the embodiment which has just been described by way of example. It applies in particular to the damping of transverse as well as longitudinal strings.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Vibration Dampers (AREA)
  • Vibration Prevention Devices (AREA)
  • Cereal-Derived Products (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Buffer Packaging (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

Dispositif amortisseur de vibrations de cordage d'une raquette (telle qu'une raquette de tennis). Il est constitué par plusieurs membranes annulaires souples (10), percées chacune d'un orifice (14) de diamètre inférieur à celui de la corde, et fixées chacune respectivement dans un des perçages annulaires d'au moins la partie inférieure du cadre, perçages destinés chacun à livrer passage à une corde (6).Device for absorbing vibrations in the stringing of a racket (such as a tennis racket). It consists of several flexible annular membranes (10), each pierced with an orifice (14) of diameter less than that of the cord, and each fixed respectively in one of the annular holes of at least the lower part of the frame, holes each intended to provide passage to a rope (6).

Description

La présente invention se rapporte à un dispositif amortisseur de vibrations de cordage d'une raquette, telle qu'une raquette de tennis, de squash, de badmington, ou autres, plus particulièrement destiné à amortir les vibrations des cordes.The present invention relates to a device for damping the vibrations of the stringing of a racket, such as a tennis, squash, badminton, or other racket, more particularly intended for damping the vibrations of the strings.

Une raquette de tennis ou autre est généralement constituée d'un manche tenu par le joueur, prolongé par un cadre appelé panier, de forme ronde ou ovale par exemple, lui-même portant le tamis composé de cordes longitudinales et de cordes transversales, formant la surface de frappe. Chaque corde traverse généralement le cadre de part en part, passant à l'intérieur d'un perçage prévu à cet effet.A tennis racket or other generally consists of a handle held by the player, extended by a frame called basket, of round or oval shape for example, itself carrying the sieve composed of longitudinal strings and transverse strings, forming the striking surface. Each rope generally crosses the frame right through, passing inside a hole provided for this purpose.

La base du panier, situé près du manche, forme généralement un "pont" supportant les cordes longitudinales centrales.The base of the basket, located near the handle, generally forms a "bridge" supporting the central longitudinal cords.

Ces raquettes de type connu ont pour inconvénient de ne pas posséder de dispositif d'amortissement des vibrations des cordes lors de l'impact de la balle, vibrations qui, comme on le sait, affectent le plus le bras du joueur et génèrent un bruit désagréable provoqué par le choc de la corde contre la base du dispositif permettant le passage et la protection de la corde.These rackets of known type have the disadvantage of not having a device for damping the vibrations of the strings during the impact of the ball, vibrations which, as is known, most affect the player's arm and generate an unpleasant noise. caused by the impact of the rope against the base of the device allowing the passage and protection of the rope.

L'invention a pour objet un dispositif d'amortissement des vibrations de cordage d'une raquette et du bruit qui en résulte permettant de palier cet inconvénient. Il est constitué par au moins une membrane annulaire souple, percée d'un orifice de diamètre inférieur à celui de la corde, et fixée respectivement dans un des perçages d'au moins la partie inférieure du panier, ou pont, perçages destinés chacun à livrer passage à la corde.The subject of the invention is a device for damping the vibrations of the stringing of a racket and the noise which results thereby making it possible to overcome this drawback. It is constituted by at least one flexible annular membrane, pierced with an orifice of diameter smaller than that of the rope, and fixed respectively in one of the holes of at least the lower part of the basket, or bridge, holes intended for each to deliver passage to the rope.

Selon une forme préférentielle de réalisation, la membrane annulaire souple est fixée dans une pièce tubulaire, dite canon ou oeillet, traversant elle-même le perçage et servant de passage à la corde. Cette pièce tubulaire est, de manière connue en soi, destinée à éviter la coupure du cordage.According to a preferred embodiment, the flexible annular membrane is fixed in a tubular piece, called a barrel or an eyelet, itself passing through the bore and serving as a passage for the rope. This tubular part is, in a manner known per se, intended to avoid cutting the rope.

L'invention sera mieux comprise, et d'autres caractéristiques apparaîtront, au cours de la description suivante d'un exemple de réalisation, en référence aux dessins annexés dans lesquels :

  • Figure 1 est une vue générale de la raquette équipée du dispositif d'amortissement de l'invention,
  • Figure 2 est une vue agrandie, avec coupe, de la partie inférieure du cadre de la raquette de la figure 1,
  • Figure 3 est une vue de détail en coupe selon la direction III-III de la figure 2,
  • Figure 4 est une vue en coupe longitudinale d'un canon avant passage de sa corde associée,
  • Figure 5 est une vue en coupe du canon de la figure 4, après passage de la corde.
The invention will be better understood, and other characteristics will appear, during the following description of an exemplary embodiment, with reference to the accompanying drawings in which:
  • FIG. 1 is a general view of the racket equipped with the damping device of the invention,
  • FIG. 2 is an enlarged view, with section, of the lower part of the frame of the racket of FIG. 1,
  • FIG. 3 is a detail view in section along the direction III-III of FIG. 2,
  • FIG. 4 is a view in longitudinal section of a barrel before passage of its associated rope,
  • Figure 5 is a sectional view of the barrel of Figure 4, after passage of the rope.

En se reportant tout d'abord à l'ensemble des figures 1 à 3, une raquette de tennis 1 est composée d'un manche 2, de deux branches 2b, prolongées par un panier 3, dont la partie inférieure 4 forme un "pont". Le cadre 3 porte lui-même le "tamis" 5, composé de cordes longitudinales 6 et de cordes tranversales 7, formant la surface de frappe.Referring first to all of Figures 1 to 3, a tennis racket 1 is composed of a handle 2, two branches 2b, extended by a basket 3, the lower part 4 of which forms a "bridge ". The frame 3 itself carries the "sieve" 5, composed of longitudinal strings 6 and transverse strings 7, forming the striking surface.

Comme on le voit sur la figure 2, chaque corde est fixée au panier 3 par passage dans des perçages 8 de ce cadre, et plus précisément dans des pièces tubulaires 9, ou "canons", ou oeillets, en polyamide par exemple, fixées dans ces perçages. Conformément à l'invention par ailleurs, une membrane annulaire souple 10, en élastomère par exemple, est rapportée, collée ou emmanchée à force, dans les canons 9 relatifs aux cordes longitudinales 6, et au moins dans la partie centrale du pont 4. Dans l'exemple représenté, tous les canons 9 relatifs aux cordes longitudinales 6 quelles qu'elles soient sont chacun équipés d'une membrane 10.As can be seen in FIG. 2, each rope is fixed to the basket 3 by passing through holes 8 in this frame, and more precisely in tubular parts 9, or "barrels", or eyelets, in polyamide for example, fixed in these holes. According to the invention, moreover, a flexible annular membrane 10, made of elastomer for example, is attached, glued or force fitted, in the barrels 9 relating to the longitudinal ropes 6, and at least in the central part of the bridge 4. In the example shown, all the barrels 9 relating to the longitudinal strings 6, whatever they are, are each fitted with a membrane 10.

Afin de procurer un effet d'amortissement, l'orifice central de chaque membrane 10 est de diamètre inférieur à celui de la corde. Celle-ci est donc fortement pincée par la membrane.In order to provide a damping effect, the central orifice of each membrane 10 is of smaller diameter than that of the cord. It is therefore strongly pinched by the membrane.

Dans l'exemple préférentiel représenté, chaque membrane 10 est fixée vers l'extrémité du canon 9, c'est-à-dire du perçage 8, située vers l'intérieur du panier 3.In the preferred example shown, each membrane 10 is fixed towards the end of the barrel 9, that is to say of the bore 8, situated towards the inside of the basket 3.

En variante, chaque membrane 10 peut être réalisée en même temps que le canon 9 associé, par bi-injection, surmoulage ou tout autre procédé.As a variant, each membrane 10 can be produced at the same time as the associated barrel 9, by bi-injection, overmolding or any other process.

En variante également, les canons 9 pourraient être absents, auquel cas chaque membrane serait fixée directement dans le perçage 8 correspondant, qui aurait alors le même diamètre intérieur que le canon 9.Alternatively also, the barrels 9 could be absent, in which case each membrane would be fixed directly in the corresponding bore 8, which would then have the same internal diameter as the barrel 9.

Les canons 9, équipés chacun de leur membrane 10, peuvent être réalisés à l'unité, mais, comme représenté sur la figure 2, ils peuvent être également réalisés d'une seule pièce de moulage par groupes de deux ou plus.The barrels 9, each equipped with their membrane 10, can be produced individually, but, as shown in FIG. 2, they can also be produced in a single molding piece in groups of two or more.

Sur la figure 2, le pont 4 est équipé, dans sa majeure partie centrale de quatre cavaliers de cordage 11, moulés d'une seule pièce et conformés comme représenté pour laisser le passage à la corde longitudinale. Par contre, aussi bien les cordes transversales que longitudinales tendues le long des parties latérales du panier 3, passent dans des canons successifs 9 qui sont formés de moulage d'une seule pièce avec une bande commune 12, portant lesdits canons, et fixée, comme représenté, dans une gorge 13 de la partie extérieure du panier 3.In FIG. 2, the bridge 4 is equipped, in its main central part with four rope jumpers 11, molded in one piece and shaped as shown to allow passage to the longitudinal rope. On the other hand, both the transverse and longitudinal strings stretched along the lateral parts of the basket 3 pass through successive barrels 9 which are formed by molding in one piece with a common strip 12, carrying said barrels, and fixed, as shown in a groove 13 in the outer part of the basket 3.

La figure 4 montre un canon 9, équipé de sa membrane 10, avant passage de la corde associée. Comme on le voit, la membrane 10 peut avoir Jne forme de cône à double-entrée. La figure 5 montre le même canon 9, après passage et tension de la corde longitudinale 6. On voit que la membrane 10 est fortement déformée vers l'intérieur de la raquette et que, l'orifice central 14 ayant été très agrandi à force par le passage de la corde 6, il s'est créé une zone de contact permanent entre la membrane et la corde.Figure 4 shows a barrel 9, equipped with its membrane 10, before passage of the associated cord. As seen, the membrane 10 may have not J conical double-entry. FIG. 5 shows the same barrel 9, after passage and tension of the longitudinal rope 6. It can be seen that the membrane 10 is strongly deformed towards the inside of the racket and that, the central orifice 14 having been greatly enlarged by force by the passage of the cord 6, a permanent contact zone has been created between the membrane and the cord.

L'invention n'est bien entendu pas limitée au mode de réalisation qui vient d'être décrit à titre d'exemple. Elle s'applique en particulier à l'amortissement des cordes transversales aussi bien que longitudinales.The invention is of course not limited to the embodiment which has just been described by way of example. It applies in particular to the damping of transverse as well as longitudinal strings.

Claims (7)

1. Dispositif d'amortissement des vibrations de cordage d'une raquette, caractérisé en ce qu'il est constitué par au moins une membrane annulaire souple (10), percée d'un orifice (14) de diamètre inférieur à celui de la corde, et fixée respectivement dans un des perçages annulaires (8) d'au moins la partie inférieure (4) du panier, perçages destinés chacun à livrer passage à la corde (6).1. Device for damping the vibrations of the stringing of a racket, characterized in that it consists of at least one flexible annular membrane (10), pierced with an orifice (14) of diameter smaller than that of the string , and fixed respectively in one of the annular bores (8) of at least the lower part (4) of the basket, bores each intended to give passage to the rope (6). 2. Dispositif selon la revendication 1, caractérisé en ce que la membrane est fixée dans la pièce tubulaire (9), dite canon ou oeillet, destinée à éviter la coupure du cordage et traversant le perçage (8).2. Device according to claim 1, characterized in that the membrane is fixed in the tubular part (9), said barrel or eyelet, intended to avoid cutting the cord and passing through the bore (8). 3. Dispositif selon la revendication 1 ou la revendication 2, caractérisé en ce que la membrane (9) est fixée vers l'extrémité du perçage située vers l'intérieur du cadre.3. Device according to claim 1 or claim 2, characterized in that the membrane (9) is fixed towards the end of the bore located towards the inside of the frame. 4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la membrane annulaire (9) a une forme de cône double-entrée.4. Device according to one of claims 1 to 3, characterized in that the annular membrane (9) has the shape of a double-entry cone. 5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que la membrane est rapportée par collage.5. Device according to one of claims 1 to 4, characterized in that the membrane is attached by gluing. 6. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que la membrane est emmanchée à force.6. Device according to one of claims 1 to 4, characterized in that the membrane is force fitted. 7. Dispositif selon la revendication 2, caractérisé en ce que la membrane est réalisée en même temps que ce canon (9) par bi-injection, surmoulage, ou autres procédés.7. Device according to claim 2, characterized in that the membrane is produced at the same time as this barrel (9) by bi-injection, overmolding, or other methods.
EP87420093A 1986-04-08 1987-04-07 Device for damping the vibrations of racket strings Expired - Lifetime EP0241393B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8605479A FR2596661B1 (en) 1986-04-08 1986-04-08 DEVICE FOR DAMPING RIBBON STRING VIBRATIONS
FR8605479 1986-04-08

Publications (2)

Publication Number Publication Date
EP0241393A1 true EP0241393A1 (en) 1987-10-14
EP0241393B1 EP0241393B1 (en) 1990-08-16

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ID=9334312

Family Applications (1)

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EP87420093A Expired - Lifetime EP0241393B1 (en) 1986-04-08 1987-04-07 Device for damping the vibrations of racket strings

Country Status (6)

Country Link
US (2) US4909511A (en)
EP (1) EP0241393B1 (en)
JP (1) JPS62295675A (en)
DE (2) DE3764293D1 (en)
ES (1) ES2016645B3 (en)
FR (1) FR2596661B1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0553769A1 (en) * 1992-01-29 1993-08-04 FRANZ VÖLKL GmbH & CO. SKI UND TENNIS SPORTARTIKELFABRIK KG Racket, particularly tennis racket
US5290031A (en) * 1991-12-28 1994-03-01 Yamaha Corporation String protector for a racket frame
EP0601701A2 (en) * 1992-11-12 1994-06-15 Tsai Chen Soong Sports rackets having all strings damped for vibration
WO1998028049A1 (en) * 1996-12-23 1998-07-02 Prince Sports Group, Inc. Notched, slotted grommet for sports racquet
US5833560A (en) * 1997-03-19 1998-11-10 Prince Sports Group, Inc. Racquetball racquet
US6527656B1 (en) 2001-11-27 2003-03-04 Wilson Sporting Goods Co. Two-piece grommet assembly for a sports racquet

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US5222998A (en) * 1992-01-31 1993-06-29 Ferrari Importing Company Device for facilitating application of variable tension to sports racquet stringing bed
US5409229A (en) * 1992-08-05 1995-04-25 Callaway Golf Company Golf club head with audible vibration attenuation
US5458331A (en) * 1994-07-22 1995-10-17 Bothwell; Brett P. Game racket with adjustable string suspension system
US5762570A (en) * 1997-05-07 1998-06-09 Shaw; Ching-Song Game racket having a head frame capable of absorbing shock
US6506134B2 (en) 1997-06-25 2003-01-14 Fabio Paolo Bertolotti Interlocking string network for sports rackets
US6132325A (en) * 1997-06-25 2000-10-17 Bertolotti; Fabio P Interlocking string network for sport rackets
US6540626B1 (en) * 2002-04-03 2003-04-01 Steven Tsai Racket structure with ball-striking racket face
US7097576B2 (en) * 2002-05-17 2006-08-29 Ef Composite Technologies, L.P. String bearing assemblies for sports racquets
US6852048B1 (en) * 2002-05-17 2005-02-08 Ef Composite Technologies, L.P. Guiding and vibration dampening string tubes for sports racquets
TW540400U (en) * 2002-06-12 2003-07-01 Sung-Gung Tsai Shock-absorption structure for thread of racket
US6811502B1 (en) 2003-04-30 2004-11-02 Wilson Sporting Goods Co. Racquet with elongated peripheral main string segments and enlarged sweet spot
US9821197B2 (en) 2007-11-26 2017-11-21 Brett Bothwell System and method for a game racquet including a grommet actuator
US9132321B2 (en) 2007-11-26 2015-09-15 Brett Bothwell System and method for an inflation bladder composite game racket
US9320946B2 (en) 2007-11-26 2016-04-26 Brett Bothwell System and method for a game racquet including an actuator
US8834306B2 (en) 2011-07-20 2014-09-16 Ef Composite Technologies, L.P. Racquet with elongated grommet barrels
TWI814023B (en) * 2021-01-28 2023-09-01 陳威融 racket shock absorber

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DE2065888A1 (en) * 1969-08-28 1976-10-28 Maark Corp Tennis racket has extruded profiled metal frame and plastics handle - the latter having a polyurethane foam core
FR2371941A1 (en) * 1976-11-26 1978-06-23 Dorestyl Racquet for tennis and similar sports - has extruded metal frame with polymer filling between cording ribs for elasticity in play
FR2495477A1 (en) * 1980-12-04 1982-06-11 Ireb Frame for tennis racquet - has space between inner and outer partitions filled with vibration absorbing material

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US1697814A (en) * 1925-12-12 1929-01-01 Gen Motors Corp Grommet
US3642283A (en) * 1970-02-02 1972-02-15 Howard John Wilkens Magnesium tennis racket with weighted throat piece
US3990701A (en) * 1974-11-26 1976-11-09 Sung Baik Kim Tennis racket
DE2752673A1 (en) * 1977-11-25 1979-05-31 Kuebler & Co Vibration transmission damping for tennis racquet - consists of short sleeves received around string ends adjacent to frame
US4204681A (en) * 1978-07-13 1980-05-27 Amf Incorporated Game ball racket wherein certain racket components are structurally integrated with the racket frame by the string with which the racket is strung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3567225A (en) * 1968-03-26 1971-03-02 Brancroft Racket Co Racket including string engaging elastomeric bushings and pads
DE2065888A1 (en) * 1969-08-28 1976-10-28 Maark Corp Tennis racket has extruded profiled metal frame and plastics handle - the latter having a polyurethane foam core
FR2371941A1 (en) * 1976-11-26 1978-06-23 Dorestyl Racquet for tennis and similar sports - has extruded metal frame with polymer filling between cording ribs for elasticity in play
FR2495477A1 (en) * 1980-12-04 1982-06-11 Ireb Frame for tennis racquet - has space between inner and outer partitions filled with vibration absorbing material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5290031A (en) * 1991-12-28 1994-03-01 Yamaha Corporation String protector for a racket frame
EP0553769A1 (en) * 1992-01-29 1993-08-04 FRANZ VÖLKL GmbH & CO. SKI UND TENNIS SPORTARTIKELFABRIK KG Racket, particularly tennis racket
EP0601701A2 (en) * 1992-11-12 1994-06-15 Tsai Chen Soong Sports rackets having all strings damped for vibration
EP0601701A3 (en) * 1992-11-12 1995-02-15 Soong Tsai C Sports rackets having all strings damped for vibration.
WO1998028049A1 (en) * 1996-12-23 1998-07-02 Prince Sports Group, Inc. Notched, slotted grommet for sports racquet
US5833560A (en) * 1997-03-19 1998-11-10 Prince Sports Group, Inc. Racquetball racquet
US6527656B1 (en) 2001-11-27 2003-03-04 Wilson Sporting Goods Co. Two-piece grommet assembly for a sports racquet

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Publication number Publication date
ES2016645B3 (en) 1990-11-16
US4993711A (en) 1991-02-19
EP0241393B1 (en) 1990-08-16
FR2596661A1 (en) 1987-10-09
FR2596661B1 (en) 1989-08-25
US4909511A (en) 1990-03-20
DE241393T1 (en) 1990-06-13
DE3764293D1 (en) 1990-09-20
JPS62295675A (en) 1987-12-23

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