EP0290424A2 - Racket frame - Google Patents

Racket frame Download PDF

Info

Publication number
EP0290424A2
EP0290424A2 EP88890098A EP88890098A EP0290424A2 EP 0290424 A2 EP0290424 A2 EP 0290424A2 EP 88890098 A EP88890098 A EP 88890098A EP 88890098 A EP88890098 A EP 88890098A EP 0290424 A2 EP0290424 A2 EP 0290424A2
Authority
EP
European Patent Office
Prior art keywords
frame
median strip
strip
frame according
hollow profiles
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
EP88890098A
Other languages
German (de)
French (fr)
Other versions
EP0290424A3 (en
EP0290424B1 (en
Inventor
Josef Fischer
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.)
Fischer GmbH
Original Assignee
Fischer 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 Fischer GmbH filed Critical Fischer GmbH
Publication of EP0290424A2 publication Critical patent/EP0290424A2/en
Publication of EP0290424A3 publication Critical patent/EP0290424A3/en
Application granted granted Critical
Publication of EP0290424B1 publication Critical patent/EP0290424B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • A63B49/10—Frames made of non-metallic materials, other than wood
    • 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
    • A63B49/10—Frames made of non-metallic materials, other than wood
    • A63B49/11—Frames made of non-metallic materials, other than wood with inflatable tubes, e.g. inflatable during fabrication
    • 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

Definitions

  • the invention relates to a frame for ball rackets, in particular tennis or squash rackets with two hollow profiles and a part in between, in which through holes are provided for the strings of the covering.
  • Fig. 1 shows a frame profile 1 produced in this way, after drilling a through hole.
  • this frame 1 cannot be covered without adaptation of the through holes by means of individual eyelets or eyelet bands 2 made of soft thermoplastic material according to FIG. 2, since the strings on the edges of the frame 1 would be cut or tear at the through hole.
  • eyelet tapes The manufacture and assembly of the individual eyelets or eyelet straps 2 is complex.
  • the use of eyelet tapes requires a large number of different eyelet tapes, which must be adapted to the respective club type, so that a separate tool for producing the same is necessary for each eyelet tape.
  • a tennis racket is known, the frame of which consists of a one-piece profile with two hollow profiles connected by a central web, the space between the two hollow profiles and the central web being filled by a plastic band which is connected to the opposite plastic band by webs is connected, the openings in the central web push through.
  • the production of such a frame profile is complex and requires the use of inserts.
  • the web connecting the two hollow profiles must be drilled in order to create a possibility for connecting the two plastic strips used.
  • the plastic part connecting the two hollow profiles must also be drilled in order to produce holes for pulling in the strings. There are therefore two drilling operations required, which are associated with high manufacturing costs.
  • the object of the invention is to provide a new eyelet frame which, while eliminating the disadvantages mentioned, offers protection against the tearing of the strings, the frame being able to be provided with the covering immediately or after the through holes have been produced.
  • the part is a central strip made of solid material, which is connected on both sides with a hollow profile made of thermosetting, fiber-reinforced plastic, the central strip optionally made of a thermoplastic, thermoset, elastomer, optionally with fiber reinforcement, rubber , Ceramics, wood, metal, e.g. Non-ferrous metal, light metal or their alloys or a composite of such materials.
  • the median strip extends from the inside to at least the outside of the frame.
  • the median strip on the outside of the frame has extensions on both sides which extend to the edge of the hollow profiles and merge seamlessly into them.
  • An additional embodiment of the invention provides that the median strip on the inside of the frame opposite the hollow profiles has a projection.
  • hollow profiles 4, 5 made of thermosetting, fiber-reinforced plastic are formed on both sides of a central strip 3 made of, for example, thermoplastic.
  • the Hoglprofile 4, 5 are designed in the shape of a handle and lie symmetrically to the center line of the center strip, which coincides with the neutral zone of the frame 1 'formed in this way or the center line of the through hole 6.
  • the edges of the through hole 6 are rounded.
  • the through holes 6 may either be before or after the frame is made, e.g. generated by drilling.
  • the frame is manufactured in such a way that the two preformed and not yet hardened hollow profiles with the preformed central strip are inserted into a corresponding shape, whereupon the ends of the sealing protruding from the mold are exposed to heat and pressure Hollow sections with compressed air undergo deformation, connection and hardening.
  • the surface of the three components can be grinded, etched or the like at their connection points. to be roughened.
  • the median strip 3 'of the frame 1' on the outside of the frame on both sides has extensions 7, 8 which extend to the edge of the hollow profiles 4 ', 5' and merge seamlessly into them.
  • the side extensions 7, 8 create wear protection, which prevents damage to the racket when it hits the ground.
  • the median strip 3.3 'on the inside of the frame opposite the hollow profiles 4.5 and 4', 5 ' have a projection 9, whereby the damping properties of the frame 1', 1st be improved.
  • the median strip 3,3 'can extend around the frame 1', 1 ⁇ into the frame handle and over the web of the frog.

Abstract

Bei einem Rahmen (1') für Ballschläger aus Kunststoff, soll verhindert werden, daß die Saiten an den Kanten der Durchgangslöcher im Rahmen scheuern und reißen. Hiezu besteht der Rahmen (1') aus einem Mittelstreifen (3) aus z.B. thermoplastischem Kunststoff, dessen Härte kleiner oder gleich der Härte der Saiten ist. An den Mittelstreifen sind beiderseits Hohlprofile (4,5) aus duroplastischem, faserverstärkten Kunststoff angeformt. Nach Herstellung des Rahmens werden die Durchgangslöcher in den Mittelstreifen (3) gebohrt und der Rahmen wird mit der Bespannung versehen.In the case of a frame (1 ') for plastic ball racquets, the strings are to be prevented from rubbing and tearing at the edges of the through holes in the frame. For this purpose, the frame (1 ') consists of a median strip (3) made of e.g. thermoplastic material whose hardness is less than or equal to the hardness of the strings. Hollow profiles (4,5) made of thermosetting, fiber-reinforced plastic are formed on both sides of the median strip. After the frame has been manufactured, the through holes are drilled in the central strip (3) and the frame is provided with the covering.

Description

Die Erfindung betrifft einen Rahmen für Ballschläger, insbesondere Tennis- oder Squashschläger mit zwei Hohlprofilen und einem dazwischen gelegenen Teil, in welchen Durchgangslöcher für die Saiten der Bespannung vorgesehen sind.The invention relates to a frame for ball rackets, in particular tennis or squash rackets with two hollow profiles and a part in between, in which through holes are provided for the strings of the covering.

Bekannt ist, daß Bündel aus Synthesefasern, zusammen mit Harzen, meist Duroplaste auf Epoxybasis, zu Ballschlägern verarbeitet werden. Die Fasern können als Gewebe, Gelege oder unidirektional im Kunststoff eingebettet sein (Prepregs), wobei sich der Kunststoff in einem sogenannten B-Zustand befindet. Diese Prepregs werden dann in Pressen oder Autoklaven unter Zufuhr von Wärme und Druck zum gewünschten Produkt verarbeitet.It is known that bundles of synthetic fibers, together with resins, usually thermosets based on epoxy, are processed into ball racquets. The fibers can be embedded in the plastic as a fabric, scrim or unidirectionally (prepregs), the plastic being in a so-called B state. These prepregs are then processed in presses or autoclaves with the application of heat and pressure to the desired product.

Fig. 1 zeigt ein nach dieser Art hergestelltes Rahmenprofil 1, nach dem Bohren eines Durchgangslochs. Dieser Rahmen 1 kann jedoch ohne Adaptierung der Durchgangslöcher mittels Einzelösen oder Ösenbändern 2 aus weichem thermoplastischen Kunststoff nach Fig. 2 nicht bespannt werden, da die Saiten an den Kanten des Rahmens 1 beim Durchgangsloch durchschnitten werden würden bzw. reißen.Fig. 1 shows a frame profile 1 produced in this way, after drilling a through hole. However, this frame 1 cannot be covered without adaptation of the through holes by means of individual eyelets or eyelet bands 2 made of soft thermoplastic material according to FIG. 2, since the strings on the edges of the frame 1 would be cut or tear at the through hole.

Die Herstellung und die Montage der Einzelösen oder Ösenbänder 2 ist jedoch aufwendig. Insbesondere erfordert die Verwendung von Ösenbändern eine Vielzahl unterschiedlicher Ösenbänder, die an den jeweiligen Schlägertyp angepaßt sein müssen, sodaß für jedes Ösenband ein eigenes Werkzeug zur Herstellung desselben notwendig ist.The manufacture and assembly of the individual eyelets or eyelet straps 2 is complex. In particular, the use of eyelet tapes requires a large number of different eyelet tapes, which must be adapted to the respective club type, so that a separate tool for producing the same is necessary for each eyelet tape.

Durch die US-PS 4,436.307 ist ein Tennisschläger bekannt geworden, dessen Rahmen aus einem einstückigen Profil mit zwei durch einen Mittelsteg verbundenen Hohlprofil besteht, wobei der Raum zwischen den beiden Hohlprofilen und dem Mittelsteg durch ein Kunststoffband ausgefüllt ist, welches mit dem gegenüberliegenden Kunststoffband durch Stege verbunden ist, die Durchbrechungen im Mittelsteg durchsetzen. Die Herstellung eines solchen Rahmenprofils ist aufwendig und erfordert die Verwendung von Einlagen. Darüberhinaus muß der die beiden Hohlprofile verbindende Steg gebohrt werden, um eine Möglichkeit zur Verbindung der beiden eingesetzten Kunststoffbänder zu schaffen. Schließlich muß der die beiden Hohlprofile verbindende Kunststoffteil ebenfalls gebohrt werden, um Löcher zum Einziehen der Bespannungssaiten herzustellen. Es sind somit zwei Bohrvorgänge erforderlich, welche mit hohem Herstellungsaufwand verbunden sind.From US-PS 4,436,307 a tennis racket is known, the frame of which consists of a one-piece profile with two hollow profiles connected by a central web, the space between the two hollow profiles and the central web being filled by a plastic band which is connected to the opposite plastic band by webs is connected, the openings in the central web push through. The production of such a frame profile is complex and requires the use of inserts. In addition, the web connecting the two hollow profiles must be drilled in order to create a possibility for connecting the two plastic strips used. Finally, the plastic part connecting the two hollow profiles must also be drilled in order to produce holes for pulling in the strings. There are therefore two drilling operations required, which are associated with high manufacturing costs.

Aufgabe der Erfindung ist die Schaffung eines neuen ösenlosen Rahmens, der unter Beseitigung der erwähnten Nachteile einen Schutz gegen das Reißen der Saiten bietet, wobei der Rahmen unmittelbar bzw. nach der Herstellung der Durchgangslöcher mit der Bespannung versehen werden kann.The object of the invention is to provide a new eyelet frame which, while eliminating the disadvantages mentioned, offers protection against the tearing of the strings, the frame being able to be provided with the covering immediately or after the through holes have been produced.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Teil ein Mittelstreifen aus Vollmaterial ist, der an beiden Seiten mit je einem Hohlprofil aus duroplastischem, faserverstärkten Kunststoff verbunden ist, wobei der Mittelstreifen wahlweise aus einem Thermoplast, Duroplast, Elastomer, jeweils gegebenenfalls mit Faserverstärkung, Kautschuk, Keramik, Holz, Metall, z.B. Buntmetall, Leichtmetall oder deren Legierungen oder einem Verbundstoff solcher Materialien besteht.This object is achieved in that the part is a central strip made of solid material, which is connected on both sides with a hollow profile made of thermosetting, fiber-reinforced plastic, the central strip optionally made of a thermoplastic, thermoset, elastomer, optionally with fiber reinforcement, rubber , Ceramics, wood, metal, e.g. Non-ferrous metal, light metal or their alloys or a composite of such materials.

In Ausgestaltung der Erfindung ist vorgesehen , daß sich der Mittelstreifen von der Innen- bis zumindest zur Außenseite des Rahmens erstreckt.In an embodiment of the invention it is provided that the median strip extends from the inside to at least the outside of the frame.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß der Mittelstreifen an der Rahmenaußenseite beidseitig Verlängerungen aufweist, die sich bis zum Rand der Hohlprofile erstrecken und fugenlos in diese übergehen.In a further embodiment of the invention it is provided that the median strip on the outside of the frame has extensions on both sides which extend to the edge of the hollow profiles and merge seamlessly into them.

Eine zusätzliche Ausgestaltung der Erfindung sieht vor, daß der Mittelstreifen an der Rahmeninnenseite gegenüber den Hohlprofilen einen Vorsprung aufweist.An additional embodiment of the invention provides that the median strip on the inside of the frame opposite the hollow profiles has a projection.

Weitere Merkmale und Einzelheiten der Erfindung werden nachfolgend anhand der Zeichnung erläutert. Es zeigen

  • Fig. 1 einen Rahmen bekannter Art im Querschnitt,
  • Fig. 2 einen adaptierten Rahmen nach Fig. 1 im Querschnitt,
  • Fig. 3 einen ersten Rahmen gemäß der Erfindung im Querschnitt,
  • Fig. 4 den ersten Rahmen mit Durchgangsbohrung,
  • Fig. 5 einen zweiten Rahmen gemäß der Erfindung, und
  • Fig. 6 den zweiten Rahmen mit Durchgangsbohrung.
Further features and details of the invention are explained below with reference to the drawing. Show it
  • 1 shows a frame of known type in cross section,
  • 2 shows an adapted frame according to FIG. 1 in cross section,
  • 3 shows a first frame according to the invention in cross section,
  • 4 shows the first frame with a through hole,
  • 5 shows a second frame according to the invention, and
  • Fig. 6 shows the second frame with a through hole.

Beim ersten Ausführungsbeispiel nach Fig. 3 und 4 sind an einen Mittelstreifen 3 aus beispielsweise thermoplastischem Kunststoff beidseitig Hohlprofile 4, 5 aus duroplastischem, faserverstärkten Kunststoff angeformt. Die Hoglprofile 4, 5 sind henkelförmig ausgebildet und liegen symmetrisch zur Mittellinie des Mittelstreifens, die sich mit der neutralen Zone des auf diese Weise gebildeten Rahmens 1′ bzw. der Mittelinie der Durchgangsbohrung 6 deckt. Wie aus Fig. 4 ersichtlich ist, sind die Ränder der Durchgangsbohrung 6 abgerundet. Die Durchgangsbohrungen 6 können entweder vor oder nach der Herstellung des Rahmens, z.B. durch Bohren erzeugt werden.In the first exemplary embodiment according to FIGS. 3 and 4, hollow profiles 4, 5 made of thermosetting, fiber-reinforced plastic are formed on both sides of a central strip 3 made of, for example, thermoplastic. The Hoglprofile 4, 5 are designed in the shape of a handle and lie symmetrically to the center line of the center strip, which coincides with the neutral zone of the frame 1 'formed in this way or the center line of the through hole 6. As can be seen from Fig. 4, the edges of the through hole 6 are rounded. The through holes 6 may either be before or after the frame is made, e.g. generated by drilling.

Die Herstellung des Rahmens erfolgt in der Weise, daß die beiden vorgeformten und noch nicht ausgehärteten Hohlprofile mit dem vorgeformten Mittelstreifen in eine entsprechende Form eingelegt werden, worauf unter Wärme- und Druckeinwirkung bei gleichzeitiger Beaufschlagung der dichtend aus der Form herausragenden Enden der Hohlprofile mit komprimierter Luft eine Verformung, Verbindung und Härtung erfolgt. Um eine gute Verbindung zu gewährleisten, kann die Oberfläche der drei Komponenten an deren Verbindungsstellen durch Schleifen, Ätzen od.dgl. aufgerauht werden.The frame is manufactured in such a way that the two preformed and not yet hardened hollow profiles with the preformed central strip are inserted into a corresponding shape, whereupon the ends of the sealing protruding from the mold are exposed to heat and pressure Hollow sections with compressed air undergo deformation, connection and hardening. In order to ensure a good connection, the surface of the three components can be grinded, etched or the like at their connection points. to be roughened.

Beim zweiten Ausführungsbeispiel nach Fig. 5 und 6 weist der Mittelstreifen 3′ des Rahmens 1˝ an der Rahmenaußenseite beidseitig Verlängerungen 7,8 auf, die sich bis zum Rand der Hohlprofile 4′,5′ erstrecken und fugenlos in diese übergehen. Durch die seitlichen Verlängerungen 7,8 wird ein Verschleißschutz geschaffen, der Beschädigungen des Schlägers bei Bodenberührungen desselben verhindert.In the second embodiment according to FIGS. 5 and 6, the median strip 3 'of the frame 1' on the outside of the frame on both sides has extensions 7, 8 which extend to the edge of the hollow profiles 4 ', 5' and merge seamlessly into them. The side extensions 7, 8 create wear protection, which prevents damage to the racket when it hits the ground.

Bei beiden Ausführungsbeispielen nach Fig. 3,4 und 5,6 kann der Mittelstreifen 3,3′ an der Rahmeninnenseite gegenüber den Hohlprofilen 4,5 bzw. 4′,5′ einen Vorsprung 9 aufweisen, wodurch die Dämpfungseigenschaften des Rahmens 1′,1˝ verbessert werden.In both embodiments according to FIGS. 3.4 and 5.6, the median strip 3.3 'on the inside of the frame opposite the hollow profiles 4.5 and 4', 5 'have a projection 9, whereby the damping properties of the frame 1', 1st be improved.

Der Mittelstreifen 3,3′ kann sich um den Rahmen 1′,1˝ herum bis in den Rahmengriff hinein und über den Steg des Herzstückes erstrecken. Die Breite des Mittelstreifens 3,3′ ist so gewählt, daß neben den Durchgangslöchern noch eine Materialdicke des Mittelstreifens von 0,1 bis 3 mm, vorzugsweise 0,5 bis 1 mm bestehen bleibt. Die Materialhärte des Mittelstreifens 3,3′ wird vorzugsweise kleiner oder gleich der Härte einer Saite der Bespannung des Ballschlägers gewählt.The median strip 3,3 'can extend around the frame 1', 1˝ into the frame handle and over the web of the frog. The width of the central strip 3.3 'is selected so that in addition to the through holes, a material thickness of the central strip of 0.1 to 3 mm, preferably 0.5 to 1 mm remains. The material hardness of the median strip 3.3 'is preferably chosen to be less than or equal to the hardness of a string covering the ball racket.

Claims (7)

1. Rahmen für Ballschläger, insbesondere Tennis- oder Squashschläger mit zwei Hohlprofilen und einem dazwischen gelegenen Teil, in welchen Durchgangslöcher für die Saiten der Bespannung vorgesehen sind, dadurch gekennzeichnet, daß der Teil ein Mittelstreifen (3, 3′) aus Vollmaterial ist, der an beiden Seiten mit je einem Hohlprofil (4, 5, 4′, 5′) aus duroplastischem, faserverstärkten Kunststoff verbunden ist, wobei der Mittelstreifen (3, 3′) wahlweise aus einem Thermoplast, Duroplast, Elastomer, jeweils gegebenenfalls mit Faserverstärkung, Kautschuk, Keramik, Holz, Metall, z.B. Buntmetall, Leichtmetall oder deren Legierungen oder einem Verbundstoff solcher Materialien besteht.1. Frame for ball rackets, in particular tennis or squash rackets with two hollow profiles and an intermediate part, in which through holes are provided for the strings of the covering, characterized in that the part is a median strip (3, 3 ') made of solid material, the is connected on both sides with a hollow profile (4, 5, 4 ', 5') made of thermosetting, fiber-reinforced plastic, the central strip (3, 3 ') optionally made of a thermoplastic, thermoset, elastomer, each optionally with fiber reinforcement, rubber , Ceramics, wood, metal, e.g. Non-ferrous metal, light metal or their alloys or a composite of such materials. 2. Rahmen nach Anspruch 1, dadurch gekennzeichnet, daß sich der Mittelstreifen (3, 3′) von der Innen- bis zumindest zur Außenseite des Rahmens (1′, 1˝) erstreckt.2. Frame according to claim 1, characterized in that the median strip (3, 3 ') extends from the inside to at least the outside of the frame (1', 1˝). 3. Rahmen nach Anspruch 2, dadurch gekennzeichnet, daß der Mittelstreifen (3, 3′) an der Rahmenaußenseite beidseitig Verlänbgerungen (7, 8) aufweist, die sich bis zum Rand der Hohlprofile (4′, 5′) erstrecken und fugenlos in diese übergehen (Fig. 5, 6).3. Frame according to claim 2, characterized in that the median strip (3, 3 ') on the outside of the frame has extensions on both sides (7, 8) which extend to the edge of the hollow profiles (4', 5 ') and seamlessly into this pass (Fig. 5, 6). 4. Rahmen nach Anspruch 2, dadurch gekennzeichnet, daß der Mittelstreifen (3, 3′) an der Rahmeninnenseite gegenüber den Hohlprofilen (4, 5; 4′, 5′) einen Vorsprung aufweist.4. Frame according to claim 2, characterized in that the median strip (3, 3 ') on the inside of the frame opposite the hollow profiles (4, 5; 4', 5 ') has a projection. 5. Rahmen nach Anspruch 1 oder 4, dadurch gekennzeichnet, daß sich der Mittelstreifen (3, 3′) über den Rahmen herum bis in den Rahmengriff hinein und über den Steg des Herzstücks erstreckt.5. Frame according to claim 1 or 4, characterized in that the median strip (3, 3 ') extends over the frame around into the frame handle and over the web of the frog. 6. Rahmen nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß der E-Modul des Mittelstreifens (3, 3′) kleiner oder gleich dem E-Modul einer Saite der Bespannung gewählt ist.6. Frame according to claim 1 or 3, characterized in that the modulus of elasticity of the median strip (3, 3 ') is chosen to be less than or equal to the modulus of elasticity of a string of covering. 7. Rahmen nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß die Breite des Mittelstreifens (3, 3′) so gewählt ist, daß neben den Durchgangslöchern für die Saiten der Bespannung eine Materialstärke von 0,1 bis 3 mm, vorzugsweise 0,5 mm bis 1 mm bestehen bleibt.7. Frame according to claim 1 or 3, characterized in that the width of the central strip (3, 3 ') is selected so that in addition to the through holes for the strings of the covering a material thickness of 0.1 to 3 mm, preferably 0.5 mm to 1 mm remains.
EP88890098A 1987-05-05 1988-04-20 Racket frame Expired - Lifetime EP0290424B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1122/87 1987-05-05
AT0112287A AT388106B (en) 1987-05-05 1987-05-05 FRAME FOR BALL RACKETS

Publications (3)

Publication Number Publication Date
EP0290424A2 true EP0290424A2 (en) 1988-11-09
EP0290424A3 EP0290424A3 (en) 1989-07-05
EP0290424B1 EP0290424B1 (en) 1991-02-27

Family

ID=3507058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88890098A Expired - Lifetime EP0290424B1 (en) 1987-05-05 1988-04-20 Racket frame

Country Status (5)

Country Link
US (1) US4913434A (en)
EP (1) EP0290424B1 (en)
JP (1) JPS63309284A (en)
AT (1) AT388106B (en)
DE (1) DE3861818D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103961849A (en) * 2013-01-31 2014-08-06 邓禄普体育用品株式会社 Racket frame

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01121074A (en) * 1987-11-05 1989-05-12 Mizuno Corp Racket frame made of fiber-reinforced plastics and method for its manufacture
JPH0687903B2 (en) * 1989-12-05 1994-11-09 住友ゴム工業株式会社 Tennis racket frame
US5242162A (en) * 1991-08-02 1993-09-07 Arthur Hong String holes of a sports racket frame
US5184818A (en) * 1991-11-14 1993-02-09 Lo Kun Nan Metal racket
US5249799A (en) * 1992-07-24 1993-10-05 Chang Chen Chung Racket including a metal reinforced throat section
JPH07194741A (en) * 1993-12-28 1995-08-01 Yamaha Corp Racket frame and its production
TW348549U (en) * 1995-05-10 1998-12-21 Prince Sports Group Inc Cushion bumper assembly for sports racquets
US6071203A (en) * 1998-08-13 2000-06-06 Prince Sports Group, Inc. Two piece sports racquet
GB2344292B (en) * 1998-12-03 2003-01-22 Dunlop Slazenger Group Ltd Hybrid composite racket frame
DE19963241B4 (en) * 1999-12-27 2004-03-04 Roland Sommer Profile body for the production of sports equipment and method for producing the profile body
US6527656B1 (en) 2001-11-27 2003-03-04 Wilson Sporting Goods Co. Two-piece grommet assembly for a sports racquet
US6800239B2 (en) 2002-02-26 2004-10-05 Prince Sports, Inc. Method of manufacturing a two piece sports racquet
US7077768B2 (en) * 2004-05-27 2006-07-18 Ef Composite Technologies, L.P. Composite racquet with double tube head frame
US7887444B1 (en) 2009-08-13 2011-02-15 Wilson Sporting Goods Co. Racquet having articulating grommet assemblies
US8834306B2 (en) 2011-07-20 2014-09-16 Ef Composite Technologies, L.P. Racquet with elongated grommet barrels
FR3034322B1 (en) * 2015-04-01 2018-09-21 Babolat Vs TENNIS RACKET
US10004950B1 (en) 2017-04-24 2018-06-26 Wilson Sporting Goods Co. String support assembly for a racquet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2042803A1 (en) * 1969-08-28 1971-03-11 Maark Corp , Cranbury, NJ (V St A ) Tennis racket
DE2235791A1 (en) * 1972-07-21 1974-01-31 Kuebler & Co Metal sports racquets - fraying of the strings prevented by providing a continuous plastic cladding
US4194738A (en) * 1977-06-30 1980-03-25 Hitachi Chemical Company, Ltd. Frame of a game racket
US4436305A (en) * 1981-08-26 1984-03-13 American Sports Equipment Composite reinforced racket structure

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1930285A (en) * 1929-05-27 1933-10-10 Roy H Robinson Built up metal tube, frame and skeletonized metal member of high strength weight, and method of forming same
US3545756A (en) * 1968-06-07 1970-12-08 Eugene W Nash Tennis racket with string supports of variable resiliency
US3814423A (en) * 1972-06-12 1974-06-04 Reynolds Metals Co Racquet construction and method of making same
JPS5516887Y2 (en) * 1975-06-27 1980-04-19
DE2719649A1 (en) * 1976-05-05 1977-11-24 Paul Lafourcade FRAME FOR BALL RACKETS, IN PARTICULAR TENNIS RACKETS AND THE METHOD OF ITS MANUFACTURING
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
US4314699A (en) * 1980-01-28 1982-02-09 Leach Industries Game racquet
US4496152A (en) * 1980-11-04 1985-01-29 Mott Jonathan Christopher Racquets with protective bumper strip
FR2528318A1 (en) * 1982-06-14 1983-12-16 Cousin Freres Sa Tennis racquet frames of hollow thermoplastic extrudate - subsequently shaped and filled, pref. of fibre reinforced polyamide plugged with expanded polyurethane
AT386531B (en) * 1985-07-09 1988-09-12 Head Sportgeraete Gmbh DEVICE FOR PROTECTING THE STRINGS OF A BALL RACKET, IN PARTICULAR TENNIS RACKET
EP0219310A3 (en) * 1985-10-11 1988-08-03 Fin Sports Limited A racquet shock absorbing device
BE904333A (en) * 1986-03-03 1986-06-30 Tsai Son Kung IMPROVED RACKET.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2042803A1 (en) * 1969-08-28 1971-03-11 Maark Corp , Cranbury, NJ (V St A ) Tennis racket
DE2235791A1 (en) * 1972-07-21 1974-01-31 Kuebler & Co Metal sports racquets - fraying of the strings prevented by providing a continuous plastic cladding
US4194738A (en) * 1977-06-30 1980-03-25 Hitachi Chemical Company, Ltd. Frame of a game racket
US4436305A (en) * 1981-08-26 1984-03-13 American Sports Equipment Composite reinforced racket structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103961849A (en) * 2013-01-31 2014-08-06 邓禄普体育用品株式会社 Racket frame
EP2762205A1 (en) * 2013-01-31 2014-08-06 Dunlop Sports Co., Ltd. Racket frame
CN103961849B (en) * 2013-01-31 2016-08-17 邓禄普体育用品株式会社 Racket frame

Also Published As

Publication number Publication date
ATA112287A (en) 1988-10-15
US4913434A (en) 1990-04-03
DE3861818D1 (en) 1991-04-04
EP0290424A3 (en) 1989-07-05
EP0290424B1 (en) 1991-02-27
JPS63309284A (en) 1988-12-16
AT388106B (en) 1989-05-10

Similar Documents

Publication Publication Date Title
EP0290424B1 (en) Racket frame
DE2328371C3 (en) Racket
DE2042803C3 (en) Tennis racket
DE3516420C2 (en) Method for producing a composite part with a complicated shape and composite part produced therewith
DE2656797C3 (en) Plastic tennis rackets
DE2631288A1 (en) FRAMEWORK FOR GAME BATS
DE2338436A1 (en) BATTERIES FOR TENNIS OR OTHER SPORTS AND METHOD FOR MANUFACTURING IT
EP0163710B1 (en) Tennis racket frame
DE19963241B4 (en) Profile body for the production of sports equipment and method for producing the profile body
DE2601336A1 (en) CAST MOLDED SPORTS BOOT AND METHOD OF MANUFACTURING THE SAME
DE10308532B3 (en) Rackets for ball games
DE102004003528B3 (en) Racket for ball games, e.g. tennis, squash, badminton or racket ball comprises a racket head and a frame with a connected grip section
DE2804569C3 (en) Frame for a racket
DE10236633B4 (en) Damping device for ball game rackets
DE2827954C2 (en) Ski and its manufacture
EP0130622A1 (en) Flexible stringer strip with string-protecting sleeves for rackets, especially tennis rackets
DE2065888C3 (en) Tennis racket with a handle applied to the ends of the handle and method for fastening the handle
DE3437942C2 (en) Helicopter rotor blade
DE19953626A1 (en) Rackets for ball games
EP0671186A1 (en) Tennis racket
DE3715414C2 (en)
EP0461561B1 (en) Racket, especially tennis or squash racket
EP0686083A1 (en) Process for making a hollow ski and hollow ski made thereby
DE2910424A1 (en) Tennis racquet frame and handle - are made from several layers of fibre embedded in hardened plastics and fitted with reinforcing layer on outside
DE4134416A1 (en) Composite material racquet frame - has holes through which strings are threaded, formed of curved parts and cemented parts

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE CH DE ES FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE CH DE ES FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19890629

17Q First examination report despatched

Effective date: 19900517

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES FR GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19910227

Ref country code: BE

Effective date: 19910227

REF Corresponds to:

Ref document number: 3861818

Country of ref document: DE

Date of ref document: 19910404

ITF It: translation for a ep patent filed

Owner name: STUDIO TORTA SOCIETA' SEMPLICE

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19910421

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19910430

Ref country code: LI

Effective date: 19910430

Ref country code: CH

Effective date: 19910430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19911101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19911230

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 88890098.2

Effective date: 19911108

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960312

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19970420

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970420

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050420

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20060622

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071101