EP0201953B1 - Vorrichtung zum Verändern des Gewichts des Trägheitsmoments oder des Schwerpunktes von Ballschlägern - Google Patents

Vorrichtung zum Verändern des Gewichts des Trägheitsmoments oder des Schwerpunktes von Ballschlägern Download PDF

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Publication number
EP0201953B1
EP0201953B1 EP86200617A EP86200617A EP0201953B1 EP 0201953 B1 EP0201953 B1 EP 0201953B1 EP 86200617 A EP86200617 A EP 86200617A EP 86200617 A EP86200617 A EP 86200617A EP 0201953 B1 EP0201953 B1 EP 0201953B1
Authority
EP
European Patent Office
Prior art keywords
racket
weight member
intended
interchangeable
interchangeable weight
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.)
Expired - Lifetime
Application number
EP86200617A
Other languages
English (en)
French (fr)
Other versions
EP0201953A1 (de
Inventor
Joris Van Raemdonck
Robert Frankish Scott
Jacques Reichling
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.)
ETABLISSEMENTS DONNAY EN ABREGE: DONNAY, S.A.
Original Assignee
Donnay En Abrege Donnay Sa Ets
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
Priority claimed from BE0/215021A external-priority patent/BE902428A/fr
Application filed by Donnay En Abrege Donnay Sa Ets filed Critical Donnay En Abrege Donnay Sa Ets
Priority to AT86200617T priority Critical patent/ATE70200T1/de
Publication of EP0201953A1 publication Critical patent/EP0201953A1/de
Application granted granted Critical
Publication of EP0201953B1 publication Critical patent/EP0201953B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A63B60/02—Ballast means for adjusting the centre of mass

Definitions

  • the present invention relates to an assembly intended to modify the weight, the moment of inertia and / or the center of gravity of a tennis, squash racket or the like.
  • US-A-3 642 283 discloses a tennis racket in which, in order to modify the weight and improve the balancing, a weight can be placed on the cross member at the base of the frame, and this weight is retained in place after stringing the racket. It is not possible to change the weight later without first removing the rope.
  • US-A-2 004 609 discloses a tennis racket in which a weight is positioned at different positions, that is to say at different distances from the center of gravity of the racket, in a recess of the handle by means of '' an adjustment screw.
  • the weight is therefore at a greater or lesser distance from the free end of the handle depending on the adjustment made, and the weight receiving recess is covered by a cover screwed onto the handle at this free end. Due to the fact that there is only one adjustable weight in the handle, the possibilities of modifying the properties of the racket are very limited.
  • DE-A-27 51 171 discloses a racket for a ball game in which additional weights can be mounted on the frame.
  • the weights are fixed by means of screws, clamps or strips, they can be screwed or glued directly to the frame.
  • the holder of this application has already proposed to insert, during the manufacture of the rackets, elements which, depending on their location in the frame and / or in the handle have an influence on the technical characteristics of the racket. This is how it is possible to modify beforehand not only the weight but also the moment of inertia and / or the center of gravity of a racket as described above.
  • the object of the invention is to propose an assembly which makes it possible to easily reach the objective aimed at, ie the modification of the weight, the moment of inertia and / or the center of gravity without harming the structure of the frame of the racket or the handle of the racket and to allow interchangeability of the elements which influence the technical performance of the racket without necessarily having to remove the string or resort to the intervention of a qualified technician or a man of job.
  • the invention provides an assembly as defined in claim 1.
  • the interchangeable weight elements consist of a rubbery material in which a powdery metallic filler is incorporated.
  • FIG. 1 represents, on a greatly enlarged scale, a section through the frame of the racket as well as through the grommet band showing the male and female elements of the assembly according to the invention.
  • Figure 2 is, on another scale, a plan view of the grommet band according to the invention.
  • FIG. 3 is a side view of the grommet strip according to FIG. 2.
  • Figure 4 is a bottom view of an interchangeable weight element according to the invention.
  • Figure 5 is a longitudinal sectional view of the end of the handle of a racket provided with an interchangeable weight element.
  • the assembly intended to modify the weight, the moment of inertia and / or the center of gravity of a tennis, squash racket or the like is based, according to the appended figures, on the use of a pass band -wire mounted in a manner known per se in the outer peripheral groove of the frame of a racket.
  • the modified grommet band is introduced into the external peripheral groove of the frame of a racket at the point where it is desired to include interchangeable weight elements within the frame of the racket.
  • the frame of the racket is represented by the reference 1 and the external peripheral groove by the reference 2.
  • the grommet band modified to carry out the assembly according to the invention is designated by the general reference 3.
  • the grommet band has from place to place passages 4 (also called “gromets").
  • the strings pass through these passages 4, in the usual way, along the geometric axis of the hollow cylindrical body of the passage in question.
  • the grommet band 3 has a longitudinal recess forming an internal cavity 5 which ends in a flange 6, so that this part of the grommet band 3 constitutes a female element relative to the longitudinal post 7 which equips the face inside of an interchangeable weight element 8.
  • the longitudinal post 7 has on the one hand a flange 9 projecting outwards and a longitudinal recess 10.
  • the longitudinal recess 10 which extends in the longitudinal plane of symmetry of the interchangeable weight element 8 is provided in order to allow the free passage of a rope from a passage 4 to another passage 4 in the grommet band 3.
  • the internal recess 5 of the element female in which fits the longitudinal post 7, has a rounded base 11. The cord therefore extends between two passages 4 in the rounded base 11 of the internal recess 5 from a passage 4 to the next passage 4.
  • Reinforcement fins 12 are provided laterally on the grommet band in order to constitute a reinforcement of the grommet band.
  • the material of which the grommet band is made is a synthetic material of the type generally used for this purpose and offering sufficient strength so that the protruding flange 9 of the longitudinal post 7 of the interchangeable weight element can be introduced into the internal hollow 5 of the female element.
  • the material of which an interchangeable element is made is preferably a rubbery material in which a powdery metallic filler is incorporated.
  • the interchangeable element 8 can be metallic or made of metal and covered with synthetic material. It is important that the material, of which the interchangeable element 8 is made, allows the insertion of the studs 7 into the internal recesses 5 of the female element of the grommet band and remains therein under the effect of the "clipping".
  • the interchangeable weight element 8 has, in a cross section, an arcuate shape such that this interchangeable weight element 8 adapts perfectly to the transverse profile of the frame of the racket.
  • Figure 5 shows, in longitudinal section, the end of the handle 13 of a racket.
  • An interchangeable weight element 14 which has a generally cylindrical shape is screwed into a recess 15 formed in the axis of the handle 13 of the racket. This recess is carried out during the development of the handle of the racket itself.
  • the element 14 has a head 14 '. This enlarged head comes, in the completion position, to be placed substantially in the external terminal plane of the handle of the racket.
  • the interchangeable weight elements 8 could also be screwed into the corresponding passages 4 of the grommet band. It is moreover obvious that the invention is not limited to the form or number of the particular elements described in the context of the present patent application.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Telescopes (AREA)
  • Toys (AREA)
  • Vibration Prevention Devices (AREA)
  • Golf Clubs (AREA)
  • Testing Of Balance (AREA)

Claims (10)

  1. Anordnung zur Veränderung des Gewichts, des Trägheitsmoments und/oder des Schwerpunkts eines mit seiner Besaitung ausgestatteten Schlägers, bestehend aus einem auswechselbaren Gewichtselement (14), das in den Griff (13) des Schlägers eingeschraubt ist und eine zylindrische Form sowie einen erweiterten Kopf (14') aufweist und das so ausgelegt ist, daß es in der Gebrauchsposition im wesentlichen in der Endebene des Schlägergriffs angeordnet ist, sowie aus einem am Rahmen (1) des Schlägers angeordneten Fadendurchführungsband (3), welches eine Vielzahl von Durchführungen (4) für die Besaitung sowie eine sich zwischen zwei Durchführungen (4) erstreckende Längsaushöhlung (5) und eine innere Kante (6) aufweist und ein weibliches Element bildet, das zur Zusammenwirkung mit einem Zapfen (7) ausgelegt ist, welcher ein männliches Element bildet, das zu einem auswechselbaren Gewichtselement (8) gehört, welches den Rahmen (1) des Schlägers schützt.
  2. Anordnung nach Anspruch 1,
    dadurch gekennzeichnet,
    daß die Durchführungen für die Besaitung in den Rahmen (1) des Schlägers durchdringenden zylindrischen Körpern (4) ausgebildet sind, die zum Schutz der Saiten in dem Bereich, in dem diese den Rahmen (1) des Schlägers durchdringen, ausgestaltet sind.
  3. Anordnung nach einem der Ansprüche 1 oder 2,
    dadurch gekennzeichnet,
    daß die Zapfen (7) der auswechselbaren Gewichtselemente (8) die Form von Längszapfen aufweisen.
  4. Anordnung nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet,
    daß die Längsaushöhlung (10) des Fadendurchführungsbandes (3) einen im Querschnitt abgerundeten Bodenbereich (11) aufweist, der zur Aufnahme einer Saite ausgestaltet ist und zwei zum Zurückhalten des Zapfens (7) des auswechselbaren Gewichtselements (8) bestimmte Kanten (6) aufweist.
  5. Anordnung nach einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet,
    daß das Fadendurchführungsband (3) stellenweise seitliche Verstärkungsrippen (12) aufweist.
  6. Anordnung nach einem der Ansprüche 1 bis 5,
    dadurch gekennzeichnet,
    daß das zum Einsetzen in die Längsaushöhlung des Bandes (5) bestimmte auswechselbare Gewichtselement (8) an seiner Außenseite eine gekrümmte Form aufweist.
  7. Anordnung nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet,
    daß das auswechselbare Gewichtselement (8) aus einem kautschukartigen Material gebildet ist, in dem eine Last in Form eines pulverförmigen Metalls enthalten ist.
  8. Anordnung nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet,
    daß das auswechselbare Gewichtselement (8) aus Metall gebildet ist.
  9. Anordnung nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet,
    daß das auswechselbare Gewichtselement (8) aus einem Metall gebildet ist, das an seiner Außenseite mit einem synthetischen Material bedeckt ist.
  10. Anordnung nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet,
    daß das auswechselbare Gewichtselement (8) aus einem synthetischen Material gebildet ist.
EP86200617A 1985-05-14 1986-04-14 Vorrichtung zum Verändern des Gewichts des Trägheitsmoments oder des Schwerpunktes von Ballschlägern Expired - Lifetime EP0201953B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86200617T ATE70200T1 (de) 1985-05-14 1986-04-14 Vorrichtung zum veraendern des gewichts des traegheitsmoments oder des schwerpunktes von ballschlaegern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE0/215021A BE902428A (fr) 1985-05-14 1985-05-14 Montage destine a modifier le poids, le moment d'inertie et/ou le centre de gravite d'une raquette.
BE215021 1985-05-14

Publications (2)

Publication Number Publication Date
EP0201953A1 EP0201953A1 (de) 1986-11-20
EP0201953B1 true EP0201953B1 (de) 1991-12-11

Family

ID=3843888

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86200617A Expired - Lifetime EP0201953B1 (de) 1985-05-14 1986-04-14 Vorrichtung zum Verändern des Gewichts des Trägheitsmoments oder des Schwerpunktes von Ballschlägern

Country Status (4)

Country Link
EP (1) EP0201953B1 (de)
JP (1) JPS6226083A (de)
AT (1) ATE70200T1 (de)
DE (1) DE3682817D1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858928A (en) * 1986-06-10 1989-08-22 Yamaha Corporation Racket frame
US4889337A (en) * 1988-06-03 1989-12-26 Fin Sports Limited Racquet shock absorbing device
US5054780A (en) * 1990-08-30 1991-10-08 Dennis Chen Weight adjustable tennis racquet
US5062634A (en) * 1990-08-31 1991-11-05 Wilson Sporting Goods Co. Squash racket
GB2249964A (en) * 1990-11-21 1992-05-27 Jeffrey Liu An improved racket head protective strip
GB2252504A (en) * 1991-02-06 1992-08-12 Jeffery Liu A means for adjusting racket gravity center
AU617286B3 (en) * 1991-02-21 1991-10-04 Jeffrey Liu A protective strip for a racket
JP4528393B2 (ja) * 1999-11-11 2010-08-18 株式会社河合楽器製作所 鍵盤
WO2002053236A1 (fr) * 2000-12-27 2002-07-11 Koji Okamoto Masse supplementaire pour extremite de poignee et structure de poids supplementaire pour extremite de poignee
US6935975B2 (en) 2003-04-10 2005-08-30 Wilson Sporting Goods Co. Racquet with channeled handle for receiving racquet string
CN101884833B (zh) * 2010-05-04 2011-11-23 厦门富帏复合材料有限公司 带有配重体的球拍拍框
GB2490951A (en) * 2011-05-19 2012-11-21 Dunlop Slazenger Internat Ltd A grommet with an outer rim cover for a string
JP2013132455A (ja) * 2011-12-27 2013-07-08 Bridgestone Sports Co Ltd ラケット及びラケット製品
JP5982817B2 (ja) * 2011-12-27 2016-08-31 ブリヂストンスポーツ株式会社 ラケット

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2004609A (en) * 1932-03-21 1935-06-11 Johnston Harry Tennis racket
US3625512A (en) * 1968-01-26 1971-12-07 Peter A Latham Extruded racket having two seamless hollow tubes formed with an interconnecting web
US3642283A (en) * 1970-02-02 1972-02-15 Howard John Wilkens Magnesium tennis racket with weighted throat piece
FR2350118A1 (fr) * 1976-05-05 1977-12-02 Lafourcade Paul Raquette pour jeu de balles a caracteristiques reglables
DE2751171A1 (de) * 1977-11-16 1979-05-17 Reppert Ruediger Lothar Von Di Schlaeger fuer ballspiele mit erhoehter schwung- und schlagkraft
EP0166561B1 (de) * 1984-06-22 1988-08-24 Dunlop Limited Sportschläger

Also Published As

Publication number Publication date
JPS6226083A (ja) 1987-02-04
DE3682817D1 (de) 1992-01-23
EP0201953A1 (de) 1986-11-20
ATE70200T1 (de) 1991-12-15

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