EP0260671A2 - Raquette en particulier pour le tennis ainsi qu'un dispositif de cordage - Google Patents

Raquette en particulier pour le tennis ainsi qu'un dispositif de cordage Download PDF

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Publication number
EP0260671A2
EP0260671A2 EP87113530A EP87113530A EP0260671A2 EP 0260671 A2 EP0260671 A2 EP 0260671A2 EP 87113530 A EP87113530 A EP 87113530A EP 87113530 A EP87113530 A EP 87113530A EP 0260671 A2 EP0260671 A2 EP 0260671A2
Authority
EP
European Patent Office
Prior art keywords
racket
string
rivet
strings
clamping
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
EP87113530A
Other languages
German (de)
English (en)
Other versions
EP0260671A3 (en
EP0260671B1 (fr
Inventor
Hans-Werner Korte-Jungermann
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT87113530T priority Critical patent/ATE66626T1/de
Publication of EP0260671A2 publication Critical patent/EP0260671A2/fr
Publication of EP0260671A3 publication Critical patent/EP0260671A3/de
Application granted granted Critical
Publication of EP0260671B1 publication Critical patent/EP0260671B1/fr
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
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/025—Means on frames for clamping string ends
    • 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
    • A63B51/14—Arrangements for stringing, e.g. for controlling the tension of the strings during stringing
    • A63B51/143—Hand-held string-tensioning devices

Definitions

  • the invention relates to a racket for ball games, in particular tennis games, with a covering of the racket surface, the covering being guided through holes in the frame, a string which can be used for covering and a stringing device.
  • the covering of rackets for ball games, in particular tennis rackets is carried out in such a way that a string is guided through holes in the edge of the racket, for example from the inside to the outside, deflected and then guided in the subsequent hole from the outside in again, so that there is an overall meandering string arrangement results. If a string breaks, this naturally also has an impact on the neighboring strings, so that in this case practically the entire string must be replaced.
  • a further disadvantage of rackets with the known stringing type is that, as a result of the deflection of the strings, the regions of adjacent holes facing each other are loaded with large forces (so-called hole reveal forces), which can sometimes lead to breakage, particularly after prolonged use of the racket.
  • Another disadvantage is that the stringing of racquets has to be carried out by means of very complex stringing devices, which can usually only be operated by specialists.
  • the invention aims to ensure that if a string breaks, there is no retroactive effect on the adjacent strings, so that only broken strings need to be replaced, and that the replacement can be carried out in the simplest possible manner without a complex stringing device.
  • the strings between opposite holes each have individual strings, and the individual strings are held in the racket frame by means of rivet sleeves firmly enclosing the strings, the rivet heads of which bear against the outer hole edges.
  • the string of the racket thus has a number of individual strings corresponding to the number of strings crossing each other.
  • the desired prestressing of the strings can be achieved in that one string, which only has a fixed rivet sleeve at its end, is guided through the hole of one edge with its free end not having a rivet sleeve, then possibly with the crossing of existing transverse sides to the opposite side of the frame and then inserted through the corresponding hole. Subsequently, here, so to speak from the outside, a rivet sleeve is attached, the string is pretensioned, then the rivet sleeve is compressed so that it is also firmly connected to the string, and then the rivet sleeve is left in the hole as a result of the applied preload slide in the edge of the racket so that the rivet head comes into contact with the outer edge of the hole. Since the pretension initially applied to the string decreases as the rivet sleeve slides into the hole, it goes without saying that this fact must be taken into account when dimensioning the pretension to be applied.
  • each string is thus attached independently of other strings, if such a string breaks, it can be repaired by replacing only this individual string.
  • a base made of elastic material, preferably plastic, is arranged between the rivet heads and the outer hole edges.
  • the rivet sleeves are surrounded by a protective tube.
  • the protective hose can advantageously serve to facilitate the sliding of the rivet sleeve into the hole.
  • the individual strings that can be used for the first stringing or also for the replacement stringing are characterized in that a rivet sleeve is firmly attached to one end of the respective single string, and that a loose rivet sleeve is provided for pushing on and connecting after insertion of the string into opposite bores.
  • the adhesion of the string in the rivet sleeve can be increased if the rivet sleeves have an internal corrugation. If the rivet sleeves are longer than the thickness of the racket frame, the rivet sleeve for connection to the single string can be compressed not only on the outside of the frame but also on the inside of the frame, thereby increasing the strength of the connection. If the rivet sleeve, which is possibly surrounded by a protective tube, protrudes slightly into the stringing area, this is also advantageous since it prevents or reduces chafing of the string in the holes in the racket frame.
  • the device for covering the rackets is characterized in that a tensioning device is provided which works in the manner of a torque wrench and which has a contact part which can be placed on the edge of the racket and a holding part which is provided for contacting the edge of the racket and is movable and thus adjustable to different frame thicknesses, and that in the system part a pretensioner which can be actuated via a lever or the like is provided with a clamping device for holding the string and a measuring device for indicating the pretension achieved, and that a device for upsetting the rivet sleeve is provided with the pretensioned string.
  • the tensioning device and the upsetting device are preferably designed as separate elements.
  • the clamping device has a clamping surface which is fixedly attached to the plant part and an eccentrically pivotably arranged or designed clamping disk.
  • the clamping disc is preferably biased against the clamping surface by a spring against the tensioning direction of the string.
  • the measuring device is designed as a scale.
  • the pretensioning device which can be actuated via a lever or the like has a ratchet with a pawl which can be switched off.
  • the holding part is adjustably attached to the plant part.
  • the stringing device is of a relatively simple construction, so that individual strings can also be exchanged without difficulty by technical laypeople.
  • Another advantage of the invention is that the force transmission from the string to the racket takes place exclusively through the rivet head and the forces are evenly distributed over the surrounding area of the hole, so that no forces occur transversely to the longitudinal direction of the string. Since the impact area of a ball is usually in the middle of the string, the strings in the middle are the most strained. Accordingly, the strings further away from the center of the racket are subjected to much less stress. The strings usually break in the middle. Since, according to the invention, the strings can be replaced individually, the significantly longer life of the strings in the "other" stringing areas can thus be fully utilized, so that the stringing of a racket according to the invention can be kept much longer than a conventional stringing.
  • a racket head, generally designated 1, of a racket for ball games, in particular tennis games, has a covering, generally designated 2.
  • the covering 2 is single strings 3 arranged in the transverse direction and single strings 4 arranged in the longitudinal direction.
  • the frame of the racket head 1, designated 5, has holes 6 for receiving the cross strings 3 in a known manner and holes (not shown) in a corresponding manner to accommodate the main strings 4.
  • the ends of the individual strings 3 and 4 are each firmly enclosed by rivet sleeves 7.
  • the outer diameter of the rivet sleeves 7 is smaller than the inner diameter of the holes 6.
  • the rivet sleeves 7 each have a rivet head 8, the outer diameter of which is larger than the inner diameter of the holes 6.
  • the outer hole edges 9 of the holes 6 are recessed, in such a way that the rivet heads 8 do not protrude beyond the outer surface of the edge of the frame 5 when the racket is in use.
  • the strings 3 and 4 are held under tension in the frame 5 in that the rivet heads rest against the outer edges 9 of the holes 6.
  • a base 10 made of elastic material, for example plastic is arranged between the hole edges 9 and the rivet heads 8.
  • the rivet sleeves 7 are surrounded by a protective tube 11.
  • FIG. 2 one of the individual strings 3, 4 is shown before clamping.
  • the length of these individual strings suitably corresponds to at least the maximum length of the longest string of the racket.
  • a rivet sleeve 7 with the rivet head 8 is firmly attached to the left end of the single string as shown in the drawing.
  • the firm connection can preferably have been achieved in that the rivet sleeve 7 pushed onto the string has been compressed by means of a suitable device such that the rivet sleeve 7 tightly encloses the string.
  • a loose rivet sleeve is provided, which is denoted by 7 ⁇ in FIG. 2 and which can be pushed onto the free (right according to the drawing) end of the string.
  • each of the individual strings 3, 4 with the "free" end which therefore does not have a fixed rivet sleeve, is passed through one of the bores 6 from the outside so that - if already present - transverse strings are crossed, and that the free end is then guided from the inside through the hole 6 opposite the first hole 6. Since the fixed rivet sleeve 7 is located at the rear end, this rivet sleeve 7 is pulled into the hole 6, and the rivet head 8 rests against the hole edge 9. The free end of the single string then protrudes from the opposite hole 6. One of the rivet sleeves 7 'is then pushed onto the free end from the outside. Then a pretension in the direction of arrow A (FIG.
  • a device for covering the racket has a tensioning device, generally designated 13, and an upsetting device, generally designated 14.
  • the tensioning device 13 operates in the manner of a torque wrench and has a contact part 15 which can be placed on the racket edge 5 and a holding part 16 which is provided for contact with the racket inner edge and is movable and thus adjustable to different frame thicknesses.
  • the holding part 16 is plate-shaped and is adjustably attached to the contact part 15 via a wing screw 17.
  • the system part 15 has a plurality of holes 18, 19 and 20.
  • a contact pin 21 is provided on the opposite side of the contact part.
  • a lever 22 is pivotally mounted at 23 in the clamping device 13. If the lever 22 is pivoted in the contact position shown in FIG.
  • the lever part 24 lying opposite to the pivot axis 23 is pivoted in the direction of arrow C.
  • a clamping device 25 for clamping the end region 12 of a string 3 is provided on the lever part 24.
  • the tensioning device 13 has a measuring device designed as a scale 26 for indicating the preload reached and a ratchet 26 with a spring-loaded, detachable pawl 27 which engages in notches 28 in the system part 15.
  • the clamping device 25 has a clamping surface 29 fixedly attached to the contact part 15 and an eccentrically mounted clamping disc 31, which is biased by a spring 32 against the tension direction A (or C) of the string 3.
  • the operation of the tensioning device 13 is as follows:
  • the upsetting device 14 shown schematically in FIGS. 5 and 6 is designed as a pliers-like structure 32 and has semicircular areas 33 on the pliers head, the length of which corresponds approximately to the length of the rivet sleeves 7, so that the rivet sleeves 7 are each enclosed by the areas 33 and then can be compressed by operating the pliers levers 35, 36.
  • the upsetting device 14 can furthermore have a cutting device for cutting off the projecting end 12. Such a cutting device is shown schematically and designated 37.
  • the pretensioning device can, for example, also be designed to be adjustable via thread, so that the pretensioning force is adjusted by a rotary movement.
  • the prestressing force can be measured via a pressure load cell, and the achievement of the desired prestressing force can be indicated by a signal, for example a light signal.
  • the desired preload can be set on the pressure cell.

Landscapes

  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Health & Medical Sciences (AREA)
  • Wire Processing (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Golf Clubs (AREA)
  • Adornments (AREA)
  • Ropes Or Cables (AREA)
  • Basic Packing Technique (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Pinball Game Machines (AREA)
  • Clamps And Clips (AREA)
EP87113530A 1986-09-18 1987-09-16 Raquette en particulier pour le tennis ainsi qu'un dispositif de cordage Expired - Lifetime EP0260671B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87113530T ATE66626T1 (de) 1986-09-18 1987-09-16 Schlaeger fuer ballspiele, insbesondere tennisspiele, sowie bespannvorrichtung hierzu.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8624960U 1986-09-18
DE8624960U DE8624960U1 (de) 1986-09-18 1986-09-18 Schläger für Ballspiele, insbesondere Tennisspiele

Publications (3)

Publication Number Publication Date
EP0260671A2 true EP0260671A2 (fr) 1988-03-23
EP0260671A3 EP0260671A3 (en) 1988-08-03
EP0260671B1 EP0260671B1 (fr) 1991-08-28

Family

ID=6798406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87113530A Expired - Lifetime EP0260671B1 (fr) 1986-09-18 1987-09-16 Raquette en particulier pour le tennis ainsi qu'un dispositif de cordage

Country Status (9)

Country Link
US (1) US4949968A (fr)
EP (1) EP0260671B1 (fr)
JP (1) JPH01500800A (fr)
AT (1) ATE66626T1 (fr)
AU (1) AU592468B2 (fr)
DE (2) DE8624960U1 (fr)
ES (1) ES2025606T3 (fr)
GR (1) GR3003085T3 (fr)
WO (1) WO1988001889A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990003829A1 (fr) * 1988-10-15 1990-04-19 Korte Jungermann Hans Werner Procede et dispositif de cordage de raquettes pour jeux de balle
EP0367712A3 (en) * 1988-11-03 1990-09-26 Hans-Werner Korte-Jungermann Clamping device

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE132381T1 (de) * 1992-01-29 1996-01-15 Voelkl Franz Ski Ballspielschläger, insbesondere tennisschläger
US5338028A (en) * 1993-12-28 1994-08-16 Right Way Co. Racket stringing apparatus
JPH10503666A (ja) * 1994-05-25 1998-04-07 コギト・ホールディングズ・リミテッド ラケットにおける改良
DE19505480A1 (de) * 1995-02-17 1996-08-22 Eberhard Von Der Mark Ballspielschläger mit Saiten-Spannvorrichtung
DE19602587A1 (de) * 1996-01-25 1997-07-31 Egram S A R L Schläger für Ballspiele, insbesondere Tennis- oder Squashschläger
US5667216A (en) * 1996-07-29 1997-09-16 Gunn; Robert H. String assembly for a racket
US5944624A (en) * 1996-12-23 1999-08-31 Prince Sports Group, Inc. Notched, slotted grommet for sports racquet
US6179735B1 (en) 1997-02-24 2001-01-30 Mcmahon Marshal Apparatus and method for maintaining differential tensions in the strings of a sporting racket
DE29708231U1 (de) * 1997-05-07 1997-07-24 Shaw, Ching-Song, Taichung Schläger mit einem Kopfrahmen mit Stoßdämpfungswirkung
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
FR2806638B1 (fr) * 2000-03-21 2002-09-20 C D M Ind Tendeur de cordes, notamment de cordes de raquettes, et machine a corder les raquettes
US6280354B1 (en) 2000-03-27 2001-08-28 Fabio P Bertolotti Monolithic string network for sport rackets
WO2001095983A1 (fr) 2000-06-09 2001-12-20 Bb Group Reseau de cordes a blocage mutuel pour raquettes de sport
US6625100B2 (en) * 2001-03-20 2003-09-23 Imation Corp. Tracking techniques for holographic data storage media
US6796916B1 (en) 2002-05-23 2004-09-28 Ef Composite Technologies, L.P. Sports racquet with deflection enhancing string bed
US7371197B1 (en) * 2007-05-25 2008-05-13 Yuan Min An Enterprise Co., Ltd. Safety racket

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2032217A (en) * 1932-07-30 1936-02-25 Diehl Tensioning device
US2040194A (en) * 1934-06-28 1936-05-12 Frederick W Whiteside Device for applying and tightening the strings of tennis rackets
US2091654A (en) * 1935-01-21 1937-08-31 Thompson Mfg Company Apparatus for stringing rackets
GB471851A (en) * 1936-04-21 1937-09-13 Charles Paul Wilson Improvements in or relating to racket stringers
FR855446A (fr) * 1939-05-30 1940-05-10 Raquette
FR1188942A (fr) * 1957-12-23 1959-09-28 Perfectionnement aux raquettes de tennis
US3664668A (en) * 1970-04-03 1972-05-23 Franklin W Held Racketball or tennis racket having a tubular metal frame
AT336456B (de) * 1973-09-07 1977-05-10 Bradley Daniel C Saitenspannvorrichtung fur tennisschlager
US3994495A (en) * 1975-09-22 1976-11-30 Stoffel Robert W Tennis racket
US4140316A (en) * 1977-08-26 1979-02-20 Coupar Robert B Tennis racquet
DE2928748A1 (de) * 1979-07-17 1981-01-29 Edgar Strelow Verfahren zum befestigen einer saite an dem rahmen eines tennisschlaegers und tennisschlaeger mit mindestens einer nach diesem verfahren befestigten saite
US4309033A (en) * 1979-09-19 1982-01-05 Amf Incorporated Clamping apparatus
US4484742A (en) * 1982-11-22 1984-11-27 Mccrone James G Stringing tool for tennis rackets and the like
DE3481976D1 (de) * 1983-07-26 1990-05-23 Ivan Szedressy Tennisschlaeger mit einer vorrichtung zur saitenbefestigung.
DE3506025A1 (de) * 1985-02-21 1986-08-21 Peter 6109 Mühltal Buschbeck Tennisschlaeger
FR2587902A1 (en) * 1985-10-02 1987-04-03 Contour Bernard Racket

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990003829A1 (fr) * 1988-10-15 1990-04-19 Korte Jungermann Hans Werner Procede et dispositif de cordage de raquettes pour jeux de balle
AU628413B2 (en) * 1988-10-15 1992-09-17 Hans-Werner Korte-Jungermann Process and device for stringing rackets for ball games
EP0367712A3 (en) * 1988-11-03 1990-09-26 Hans-Werner Korte-Jungermann Clamping device

Also Published As

Publication number Publication date
ATE66626T1 (de) 1991-09-15
DE3772496D1 (de) 1991-10-02
AU7917587A (en) 1988-04-07
AU592468B2 (en) 1990-01-11
US4949968A (en) 1990-08-21
EP0260671A3 (en) 1988-08-03
WO1988001889A2 (fr) 1988-03-24
JPH01500800A (ja) 1989-03-23
EP0260671B1 (fr) 1991-08-28
WO1988001889A3 (fr) 1988-04-07
DE8624960U1 (de) 1987-08-20
GR3003085T3 (en) 1993-02-17
ES2025606T3 (es) 1992-04-01

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