EP0602545A1 - String or string segment for rackets - Google Patents

String or string segment for rackets Download PDF

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Publication number
EP0602545A1
EP0602545A1 EP93119851A EP93119851A EP0602545A1 EP 0602545 A1 EP0602545 A1 EP 0602545A1 EP 93119851 A EP93119851 A EP 93119851A EP 93119851 A EP93119851 A EP 93119851A EP 0602545 A1 EP0602545 A1 EP 0602545A1
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EP
European Patent Office
Prior art keywords
string
length
elasticity
modulus
racket
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
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EP93119851A
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German (de)
French (fr)
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EP0602545B1 (en
Inventor
Siegfried Kuebler
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Individual
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Individual
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Publication of EP0602545A1 publication Critical patent/EP0602545A1/en
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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
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • 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
    • A63B51/001—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings using strings made of different materials on the same frame, e.g. gut and nylon
    • 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
    • A63B51/02—Strings; String substitutes; Products applied on strings, e.g. for protection against humidity or wear
    • A63B51/023—Strings having characteristics varying along the length of the string, e.g. diameter or elasticity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2964—Artificial fiber or filament
    • Y10T428/2967—Synthetic resin or polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2964—Artificial fiber or filament
    • Y10T428/2967—Synthetic resin or polymer
    • Y10T428/2969—Polyamide, polyimide or polyester

Definitions

  • the invention relates to a string or a string i.w. constant diameter for covering a racket for ball games, in particular a tennis racket.
  • a simple experiment proves that the ball bounces higher or faster from such a surface than from a rigid surface, for example a concrete wall or the like. Even if the face of a ball racket can have all possible geometrical shapes, the majority of commercially available ball rackets offer a more or less oval face shape; this has proven to be the cheapest over the centuries.
  • the string strings for common stringing - with main and cross strings or with diagonal strings - are used in a uniform thickness or with an unchangeable cross-section.
  • they are consistently of one material or the same material composition and in the same Type of execution within the line. This means that their elasticity behavior - provided the same force is applied - is the same in every section of the strand.
  • the inventor has set itself the goal of increasing the sweet spot of the playing surface and thus creating an ideal covering which the ball does not necessarily have to hit in the middle in order to be optimally accelerated; Such a hit security in the middle of the racket is not always possible despite the greatest skill of a player. In addition, the striking behavior of the racket is to be improved overall.
  • the string string should specifically have different elasticity modules; In this way, the sweet spot can be enlarged, reduced, shifted, or several such spots can be arranged on the face at the same time.
  • a string according to the invention one would be able to assign a predetermined stretch to the string lengths different from hole to hole; the string would have a different modulus of elasticity in each section.
  • both string strings - for example the one for the main string and the one for the cross string - would complement each other, ie that the two should have different elastic moduli within the string. But even one strand in the configuration according to the invention would already produce measurable results.
  • the elastic modulus of the string or the string is different in sections, i.e. the modulus of elasticity changes - with the same force acting on the cross-section of the string - in accordance with specifications within the length of the string section abruptly or gradually, once or several times in one or both directions.
  • the string or the string can have a modulus of elasticity increasing in one direction or one whose value changes at least twice - preferably several times - along the string length.
  • a string string with different elasticity behavior within the relevant string length - from about 2 m to 14 m - can be produced in different ways.
  • materials with less elasticity can be added, for example as fibers, as a pure material admixture or as a covering, which could also be done by suitable vapor deposition. The same naturally also applies in the opposite sense; more elastic materials can replace the original material in the string.
  • Strings are also conceivable, the materials of which alternate within the string. Chemical treatment of the string at the intended locations is also possible, which could result in a lower or higher elasticity at the treated locations.
  • the sweet spot can now be enlarged according to the task. But the opposite way could also be advantageous for some players, namely the reduction of the sweet spot. Then the one spot on the racket would produce a particularly high acceleration, which should be higher than that which can be achieved with a larger sweet spot.
  • the invention offers solutions for both cases. But also different behaviors of the face (for example, think of two sweet spots on the face) can be generated with the string with the appropriate design.

Abstract

In a string or string segment of uniform diameter for stringing a racquet for ball games, especially a tennis racquet, the modulus of elasticity of the string or string segment varies from section to section.

Description

Die Erfindung betrifft einen Saitenstrang oder eine Saite i.w. gleichbleibenden Durchmessers zum Bespannen eines Schlägers für Ballspiele, insbesondere eines Tennisschlägers.The invention relates to a string or a string i.w. constant diameter for covering a racket for ball games, in particular a tennis racket.

Ballschläger -- insbesondere Tennisschläger etwa gemäß DE-PS 34 34 898 mit in einem Spannrahmen vorgesehener Bespannungsfläche aus Saiten, die gegebenenfalls Abschnitte mindestens eines längeren Saitenstranges sind mit einer parallel zur Schlägerlängsachse verlaufender längsten Saite von 330 mm -- werden mit Saiten bespannt, um eine elastische Schlagfläche entstehen zu lassen, von der ein auftreffender Ball abspringen kann. Ein einfacher Versuch beweist, daß der Ball von einer solchen Fläche höher bzw. schneller abprallt als von einer starren Fläche, beispielsweise einer Betonwand od.dgl. Wenn auch die Schlagfläche eines Ballschlägers alle möglichen geometrische Formen aufweisen kann, bietet doch der überwiegende Teil handelsüblicher Ballschläger eine mehr oder weniger ovale Schlagflächenform an; diese Ausführung hat sich im Laufe der Jahrhunderte als die günstigste erwiesen.Ball racquets - in particular tennis racquets, for example according to DE-PS 34 34 898, with a stringing surface provided in a tensioning frame, which may be sections of at least one longer string with a longest string of 330 mm running parallel to the longitudinal axis of the racket - are strung with strings, around one to create elastic striking surface from which an impacting ball can jump off. A simple experiment proves that the ball bounces higher or faster from such a surface than from a rigid surface, for example a concrete wall or the like. Even if the face of a ball racket can have all possible geometrical shapes, the majority of commercially available ball rackets offer a more or less oval face shape; this has proven to be the cheapest over the centuries.

Trifft der Ball etwa auf die Mitte des Ovals -- oder auch etwas mehr zum Griff hin auf das Saitenbett --, wird der Ball zurückgeschleudert; der Ball hat den sog. "Sweet-Spot" getroffen, also die bestmögliche Beschleunigungsfläche auf dem Schläger.If the ball hits the center of the oval - or a little more towards the handle on the string bed - the ball is thrown back; the ball hit the so-called "sweet spot", ie the best possible acceleration area on the racket.

Die Saitenstränge für gebräuchliche Bespannungen -- mit Längs- und Quersaiten oder mit Diagonalsaiten -- werden in gleichmäßiger Dicke bzw. mit unveränderlichem Querschnitt eingesetzt. Zudem sind sie durchgehend aus einem Material bzw. der gleichen Materialzusammensetzung und in der gleichen Ausführungsart innerhalb des Stranges. Das bedeutete, daß auch ihr Elastizitätsverhalten -- gleiche Krafteinwirkung vorausgesetzt -- in jedem Abschnitt des Strangs gleich ist.The string strings for common stringing - with main and cross strings or with diagonal strings - are used in a uniform thickness or with an unchangeable cross-section. In addition, they are consistently of one material or the same material composition and in the same Type of execution within the line. This means that their elasticity behavior - provided the same force is applied - is the same in every section of the strand.

Angesichts dieser Gegebenheiten hat sich der Erfinder das Ziel gesetzt, den Sweet-Spot der Schlagfläche zu vergrößern und so eine ideale Bespannung zu schaffen, auf die der Ball nicht unbedingt in deren Mitte auftreffen muß, um optimal beschleunigt zu werden; eine derartige Treffersicherheit in Schlägermitte ist trotz größter Geschicklichkeit eines Spielers nicht immer möglich. Zudem soll das Schlagverhalten des Schlägers insgesamt verbessert werden.In view of these circumstances, the inventor has set itself the goal of increasing the sweet spot of the playing surface and thus creating an ideal covering which the ball does not necessarily have to hit in the middle in order to be optimally accelerated; Such a hit security in the middle of the racket is not always possible despite the greatest skill of a player. In addition, the striking behavior of the racket is to be improved overall.

Zur Lösung dieser Aufgabe führt die Lehre nach dem unabhängigen Patentanspruch; die Unteransprüche geben besonders günstige Ausgestaltungen der Erfindung an.The teaching according to the independent claim leads to solving this problem; the subclaims indicate particularly favorable embodiments of the invention.

Im Rahmen der Erfindung soll der Saitenstrang gezielt unterschiedliche Elastizitätsmodule aufweisen; auf diese Weise kann der Sweet-Spot vergrößert, verkleinert, verschoben, oder es können mehrere solcher Spots zugleich auf der Schlagfläche angeordnet werden. Man wäre mit einer solchen erfindungsgemäßen Saite in der Lage, den von Loch zu Loch im Rahmen unterschiedlichen Saitenlängen eine zuvor festgelegte Dehnung zuzuweisen; die Saite hätte in jedem Abschnitt einen anderen Elastizitätsmodul.Within the scope of the invention, the string string should specifically have different elasticity modules; In this way, the sweet spot can be enlarged, reduced, shifted, or several such spots can be arranged on the face at the same time. With such a string according to the invention one would be able to assign a predetermined stretch to the string lengths different from hole to hole; the string would have a different modulus of elasticity in each section.

Um beste Ergebnisse zu erzielen, wäre es von Vorteil, daß beide Saitenstränge -- z.B. derjenige für die Längssaite und der für die Quersaite -- sich jeweils ergänzen würden, d.h., daß beide gezielt unterschiedliche Elastizitätsmodule innerhalb des Strangs aufweisen müßten. Aber auch nur ein Strang in der erfindungsgemäßen Ausgestaltung würde schon meßbare Ergebnisse bringen.In order to achieve the best results, it would be advantageous that both string strings - for example the one for the main string and the one for the cross string - would complement each other, ie that the two should have different elastic moduli within the string. But even one strand in the configuration according to the invention would already produce measurable results.

So ist erfindungsgemäß der Elastizitätsmodul des Saitenstranges bzw. der Saite abschnittsweise unterschiedlich, d.h. der Elastizitätsmodul ändert sich -- bei gleicher Krafteinwirkung auf den Saitenquerschnitt bezogen -- gezielt nach Vorgaben innerhalb der Saitenstranglänge streckenweise abrupt oder allmählich, einmal oder mehrfach nach einer oder nach beiden Richtungen.According to the invention, the elastic modulus of the string or the string is different in sections, i.e. the modulus of elasticity changes - with the same force acting on the cross-section of the string - in accordance with specifications within the length of the string section abruptly or gradually, once or several times in one or both directions.

Bei einer Ausführung besteht ein stufenweiser Wechsel des Elastizitätsmoduls entlang der Saitenlänge, bei einer anderen aber eine stufenlose Änderung.In one version there is a gradual change in the modulus of elasticity along the string length, but in another there is a continuous change.

Wie erwähnt, kann der Saitenstrang bzw. die Saite im Rahmen der Erfindung einen in einer Richtung ansteigenden Elastizitätsmodul besitzen oder einen, dessen Wert sich entlang der Saitenlänge zumindest zweimal -- bevorzugt mehrmals -- verändert.As mentioned, within the scope of the invention the string or the string can have a modulus of elasticity increasing in one direction or one whose value changes at least twice - preferably several times - along the string length.

Nach einem weiteren Merkmal der Erfindung soll zwischen Höchst- und Niedrigstwert für den Elastizitätsmodul mindestents einmal ein Verhältnis von über 1,25 bestehen.According to a further feature of the invention, there should be at least one ratio of above 1.25 between the maximum and the minimum value for the elastic modulus.

Ein Saitenstrang mit unterschiedlichen Elastizitätsverhalten innerhalb der betreffenden Stranglänge -- von etwa 2 m bis 14 m -- kann auf verschiedene Weise hergestellt werden. In dem Bereich, in dem die Saite weniger elastisch sein soll, können Materialien mit geringerer Elastizität beigemischt werden, z.B. als Fasern, als reine Materialbeimischung oder als Umhüllung, was etwa auch durch eine geeignete Bedampfung geschehen könnte. Dasselbe gilt natürlich auch in umgekehrtem Sinne; es können elastischere Materialien an die Stelle des ursprünglichen Materials im Saitenstrang treten.A string string with different elasticity behavior within the relevant string length - from about 2 m to 14 m - can be produced in different ways. In the area in which the string should be less elastic, materials with less elasticity can be added, for example as fibers, as a pure material admixture or as a covering, which could also be done by suitable vapor deposition. The same naturally also applies in the opposite sense; more elastic materials can replace the original material in the string.

Es sind auch Saiten denkbar, deren Materialien innerhalb des Stranges abwechseln. Auch eine chemische Behandlung der Saite an den vorgesehenen Stellen ist möglich, die eine geringere oder auch höhere Elastizität an den behandelten Stellen bewirken könnte.Strings are also conceivable, the materials of which alternate within the string. Chemical treatment of the string at the intended locations is also possible, which could result in a lower or higher elasticity at the treated locations.

Die Vorteile solcher Saiten mit gezielt unterschiedlicher Elastizität innerhalb eines Saitenstrangs, der nicht unbedingt z.B. für alle Längssaiten in seiner Länge reichen muß, liegen auf der Hand. Es entsteht die Möglichkeit einer gezielten Steuerung (Vergrößerung, Verkleinerung, Verschiebung) des Sweet-Spots durch solche Saiten auf der Schlagfläche eines Ballschlägers. Der Sweet-Spot könnte durch geeignete Saitenstränge optimal auf die Spielweise eines Spielers abgestimmt werden.The advantages of such strings with different elasticity within a string that is not necessarily e.g. length must be sufficient for all main strings are obvious. There is the possibility of targeted control (enlargement, reduction, displacement) of the sweet spot by means of such strings on the face of a ball racket. The sweet spot could be optimally matched to a player's playing style by means of suitable string strings.

Dank dieser Maßgaben kann nun der Sweet-Spot aufgabengemäß vergrößert werden. Aber auch der umgekehrte Weg könnte für manche Spieler vorteilhaft sein, nämlich die Verkleinerung des Sweet-Spots. Dann würde eben die eine Stelle auf dem Schläger eine besonders hohe Beschleunigung erzeugen, die höher liegen dürfte, als eine mit einem größeren Sweet-Spot zu erzielende.Thanks to these measures, the sweet spot can now be enlarged according to the task. But the opposite way could also be advantageous for some players, namely the reduction of the sweet spot. Then the one spot on the racket would produce a particularly high acceleration, which should be higher than that which can be achieved with a larger sweet spot.

Die Erfindung bietet je nach Ausführungsart des Saitenstranges Lösungsmöglichkeiten für beide Fälle an. Aber auch abweichende Verhaltensweisen der Schlagfläche (man denke z.B. an zwei Sweet-Spots auf der Fläche) können mit der Saite bei entsprechender Ausführung erzeugt werden.Depending on the type of string string, the invention offers solutions for both cases. But also different behaviors of the face (for example, think of two sweet spots on the face) can be generated with the string with the appropriate design.

Claims (8)

Saitenstrang oder Saite gleichbleibenden Durchmessers zum Bespannen eines Schlägers für Ballspiele, insbesondere eines Tennisschlägers,
dadurch gekennzeichnet,
daß der Elastizitätsmodul des Saitenstranges bzw. der Saite abschnittsweise unterschiedlich ist.String string or string of constant diameter for stringing a racket for ball games, in particular a tennis racket,
characterized,
that the elastic modulus of the string or the string is different in sections. Saitenstrang oder Saite nach Anspruch 1, gekennzeichnet durch einen stufenweisen Wechsel des Elastizitätsmoduls entlang der Saitenlänge.String string or string according to claim 1, characterized by a gradual change of the elastic modulus along the string length. Saitenstrang oder Saite nach Anspruch 1, gekennzeichnet durch eine stufenlose Änderung des Elastizitätsmoduls entlang der Saitenlänge.String string or string according to claim 1, characterized by a continuous change in the elastic modulus along the string length. Saitenstrang oder Saite nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Elastizitätsmodul in einer Richtung der Saitenlänge ansteigend ausgebildet ist.String string or string according to one of Claims 1 to 3, characterized in that the modulus of elasticity is designed to increase in a direction of the string length. Saitenstrang oder Saite nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sich der Wert des Elastizitätsmoduls entlang der Saitenlänge zumindest zweimal verändert.String string or string according to one of claims 1 to 3, characterized in that the value of the elastic modulus changes at least twice along the string length. Saitenstrang oder Saite nach wenigstens einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß zwischen Höchst- und Niedrigstwert für den Elastizitätsmodul mindestens einmal ein Verhältnis von über 1,25 besteht.String string or string according to at least one of Claims 1 to 5, characterized in that there is at least one ratio of more than 1.25 between the maximum and the minimum value for the modulus of elasticity. Saitenstrang nach einem der Ansprüche 1 bis 6, gekennzeichnet durch eine Länge von mindestens 2000 mm.String string according to one of claims 1 to 6, characterized by a length of at least 2000 mm. Saitenstrang nach einem der Ansprüche 1 bis 7, gekennzeichnet durch eine Länge von höchstens 14000 mm.String string according to one of claims 1 to 7, characterized by a length of at most 14000 mm.
EP93119851A 1992-12-17 1993-12-09 String or string segment for rackets Expired - Lifetime EP0602545B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4242673 1992-12-17
DE4242673A DE4242673A1 (en) 1992-12-17 1992-12-17 String string or string for stringing a racket for ball games

Publications (2)

Publication Number Publication Date
EP0602545A1 true EP0602545A1 (en) 1994-06-22
EP0602545B1 EP0602545B1 (en) 1997-08-06

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ID=6475576

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EP93119851A Expired - Lifetime EP0602545B1 (en) 1992-12-17 1993-12-09 String or string segment for rackets

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US (1) US5419963A (en)
EP (1) EP0602545B1 (en)
DE (2) DE4242673A1 (en)

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US9821197B2 (en) 2007-11-26 2017-11-21 Brett Bothwell System and method for a game racquet including a grommet actuator
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EP0560015A1 (en) * 1992-03-09 1993-09-15 Siegfried Kuebler String or string length-section for racquets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638339A1 (en) * 1993-08-10 1995-02-15 Gosen Co., Ltd. Racket string and stringed rackets using the same
US5478072A (en) * 1993-08-10 1995-12-26 Gosen Co., Ltd. Racket string and stringed rackets using the same

Also Published As

Publication number Publication date
EP0602545B1 (en) 1997-08-06
DE59307070D1 (en) 1997-09-11
DE4242673A1 (en) 1994-06-23
US5419963A (en) 1995-05-30

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