EP0163710B1 - Rahmen für einen tennisschläger - Google Patents

Rahmen für einen tennisschläger Download PDF

Info

Publication number
EP0163710B1
EP0163710B1 EP85900100A EP85900100A EP0163710B1 EP 0163710 B1 EP0163710 B1 EP 0163710B1 EP 85900100 A EP85900100 A EP 85900100A EP 85900100 A EP85900100 A EP 85900100A EP 0163710 B1 EP0163710 B1 EP 0163710B1
Authority
EP
European Patent Office
Prior art keywords
profile
tennis racket
reinforcing ribs
legs
frame
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
Application number
EP85900100A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0163710A1 (de
Inventor
Walter Senator H.C. Dr.H.C.Ing. Holzer
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
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 Individual filed Critical Individual
Publication of EP0163710A1 publication Critical patent/EP0163710A1/de
Application granted granted Critical
Publication of EP0163710B1 publication Critical patent/EP0163710B1/de
Expired 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
    • A63B49/10—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
    • A63B49/022—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
    • A63B49/08—Frames with special construction of the handle
    • 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
    • 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
    • A63B2049/103—Frames made of non-metallic materials, other than wood string holes produced during moulding process
    • 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
    • A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations

Definitions

  • the invention relates to a tennis racket, consisting of an injection-molded, open to the outside U-shaped profiled hollow profile, which consists of a connecting web in which the holes for the implementation of the strings are arranged, to which lateral U-legs connect , which define an interior, which is positively covered by a counter profile, in which holes are also arranged for the passage of the strings, which are aligned with the holes in the hollow profile, reinforcing ribs being arranged in the interior of the hollow profile.
  • a tennis racket mentioned at the outset has become known, for example, with the subject of US Pat. No. 4,194,738.
  • the U-shaped profiled hollow profile shown there has no reinforcing ribs in the interior. Rather, the reinforcing ribs are formed on the central web of the counter profile inserted into the hollow profile and are supported on the base of the connecting web of the U-shaped profiled hollow profile. The purpose of this measure is to force the stringing force from the strings onto the hollow profile.
  • the reinforcing rib is formed as a central, circumferential rib on the counter profile, which means that the racket head is only slightly resistant to torsion, because a central, continuous rib, which lies loosely on the inside of the connecting web of the hollow profile, a relative allows severe twisting of the club head.
  • Another disadvantage is that only low bending stiffness and poor damping capacity are achieved.
  • the U-shaped hollow profile in the club head area converges in the grip area to form a double-T profile. From an injection molding point of view, such a double-T profile can only be mastered with appropriate side shifters, which leads to increased production costs and thus to higher costs of this tennis racket.
  • FR-A-2 270 908 a further tennis racket frame, made by injection molding, has become known, which is composed of two half-shells which, when placed on top of one another, overlap and are connected to one another.
  • the profile of this tennis racket does not consist of a hollow profile which is open to the outside and has the disadvantages of poor flexural rigidity, torsional rigidity and poor damping behavior.
  • the object of the invention is to develop a tennis racket according to US Pat. No. 4,194,738 in such a way that it has improved mechanical properties at comparable or lower production costs, particularly with regard to the torsional rigidity, the flexural rigidity and the damping behavior.
  • the invention proposes a framework with the features of claim 1.
  • An essential feature of the invention is therefore that the reinforcing ribs are arranged in the U-profile itself, which are also connected in one piece with the U-profile molded support sleeves, in which the holes for the strings are made.
  • the stringing is therefore no longer - as in US-A-4 194 738 - transmitted to the U-profile via the counter-profile and a reinforcing rib connected to the counter-profile, but the U-profile itself now serves directly to take the load in the direction of the covering.
  • the improved bending stiffness and torsional stiffness is achieved by the aforementioned reinforcing ribs, which are integrally connected to the support sleeves. Support sleeves and reinforcing ribs are thus load-transferring elements in the U-shaped hollow profile.
  • a particularly favorable distribution of the reinforcing ribs results from the fact that the reinforcing ribs extend in a star shape from the support sleeves and are connected both to the connecting web and to the U-legs.
  • the reinforcing ribs and the support sleeves extend up to close to the end faces of the U-legs of the hollow profile, the counter profile being inserted into the interior of the hollow profile defined thereby, which has a tapering side Profile legs covering the end faces of the U-legs.
  • the counter profile is integrally connected to the U-legs of the hollow profile in the region of the tapered profile legs.
  • Such a material connection could take place by ultrasonic welding or by vibration welding. Gluing is also possible.
  • a complete protection of the string knots results from the subject of claim 8 in that the counter profile has a circumferential locking groove, which is delimited by opposite, lateral locking lips, behind which an elastically deformable protective profile can be pressed into the locking groove, which covers the string knots .
  • the entire narrow side of the club head is protected against damage and the visual impression is optimal, because the knots are no longer visible.
  • the bending moment of resistance of the hollow profile in the head area of the racket is reduced compared to the bending moment of resistance in the other areas.
  • the tip of the racket head thus has a U-profile of smaller width and lower leg height than comparatively the rest of the U-profile in the other areas of the racket head.
  • the handle of the racket consists of a polygonal, approximately rounded profile edge profile, which has a central bore.
  • the longitudinal axis of the bore is aligned parallel to the longitudinal axis of the racket, so that the handle can be formed directly in the injection mold by a slide which moves in at the end and which enters the central bore.
  • Another advantage is that the diameter of the edge profile can be changed directly by replaceable inserts in the injection mold, so that it is possible to produce the racket with a certain grip strength in one step in the mold. It is then no longer necessary to foam up a further grip piece or to take other measures in order to obtain a desired grip strength.
  • the hollow profile is produced by injection molding.
  • the counter profile and the cover profile can be produced by extrusion.
  • the material used for the hollow profile produced by the injection molding process is a high-strength, thermoplastic, to which carbon fibers in the range from 20 to 40% by weight are added.
  • carbon fibers in the range from 20 to 40% by weight are added.
  • glass fibers can also be added.
  • B. a Share of 20% glass fibers and 20% carbon fibers can be used. These mixing ratios can be varied within a wide range and depend on the desired final strength and the required manufacturing costs.
  • the z. B. additionally strengthen the heart area, be inserted.
  • a central web part 25 lying horizontally in FIG. 3 is adjoined at an angle to the horizontal by two web parts 26, 27 which merge into vertical U-legs 31, 32.
  • reinforcing ribs 15 are built into the U-profile, which are integral with the material of the U-profile 2a.
  • Figure 1 and Figure 3 show that 25 support sleeves 10 are formed on the inside of the central web part, to which the reinforcing ribs 15 (Fig. 2) connect laterally and in a star shape.
  • the support sleeves 10 are connected in the direction of the longitudinal axis (section line II in FIG. 2) by the central ribs 28, while the spread apart side ribs 29, which meet in the region of the inner wall of the U-legs 31, 32 and there with the U-legs 31, 32 are connected in one piece.
  • FIG. 1 shows the horizontal section through the central rib 28, the (cut) support sleeves 10 forming bores 8 for the passage of the strings.
  • the diameter of the bores 8 is chosen so that it is smaller than the web width of the web part 25 (see FIG. 3).
  • the club head is formed by the all-round, self-contained U-profile 2a.
  • two U-profiles 39, 40 are formed in one piece from the surrounding U-profile 2a. This forms the heart region 38, in the center of which a V-shaped recess 48 is formed.
  • the two U-profiles 39, 40 also have internal reinforcing ribs 15 in the manner described with reference to FIGS. 2 and 3. However, the support sleeves 10 shown in FIG. 2 with the bores 8 made therein are missing.
  • the two U-profiles 39, 40 converge in a connection area 42 on the handle 43 and are connected there in one piece to the edge profile 48 of the handle 43.
  • the edge profile is a hexagonal to ten-sided profile approximated to the round profile, this edge profile 46 being shaped in the injection molding machine by means of a slide which moves into the central bore 44 in the direction of the arrow 45.
  • a counter profile 30 is inserted into the interior space 18 of the hollow profile 1a defined in this way, which covers the end faces of the U-legs 31, 32 with lateral, tapering profile legs 33.
  • the profile legs 33 have a radius 47 on the surface, with which they run into two opposing, facing locking lips 35, which have a locking groove 34 between them for receiving a protective profile 36 train.
  • the protective profile 36 here consists of an elastic band which can be clipped into the locking groove 34 behind the locking lips 35. As a result, the string knots 37 are optimally protected and are no longer visible from the outside.
  • Bores 5 (not shown in FIG. 3) are made in the counter profile 30, which are aligned with the bores 8 in the U profile 2a.
  • FIGS. 1 to 3 show simplified modifications of the preferred exemplary embodiment shown in FIGS. 1 to 3.
  • the hollow profile 1 shown in FIG. 6 is in turn a U-profile 2, in which the counter profile 3 can be designed differently according to the representations in FIGS. 4, 6 to 9.
  • the connecting web 4 of the U-profile 2 has support sleeves 10 formed integrally with this connecting web 4.
  • the support sleeves 10 have such a clear diameter that the bores 5, which can be integral with the counter-profile 3, but not need to be introduced.
  • injection technology always ensures that the bores 5 for the string feed-throughs are kept clear of every burr and always ensure optimal and rapid threading of the strings.
  • recesses 23 are then provided, which serve to accommodate the strings, so that the strings are embedded on the outer circumference of the racket in a manner protected against mechanical damage.
  • Figure 4 shows that the counter profile can also be formed from a band 20 on which the guide sleeves 7 are integrally formed with the holes 5 made therein.
  • the invention shows that it is possible to design a racket made by injection molding in such a way that it is equivalent in terms of its static and dynamic properties to rackets, the production of which causes a multiple of the costs that are spent on the racket according to the invention .
  • the material thicknesses of the reinforcing ribs 15 of the connecting webs 4 and the U-legs 31, 32 are chosen to be the same.
  • reinforcing ribs 49 which have a cruciform shape, are formed in the U-profile 2a shown in FIG.
  • the U-legs 31, 32 of the U-profile 2a are connected to one another via reinforcing ribs running in the transverse direction, while the support sleeves 10 are connected to each other via reinforcing ribs running in the longitudinal direction. This results in a grid or grid-shaped arrangement of the reinforcing ribs 49.
  • FIG. 8 an X-shaped arrangement of the reinforcing ribs 50 is provided, while in FIG. 2, a zigzag-shaped arrangement of the reinforcing ribs 51 is provided.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Golf Clubs (AREA)
EP85900100A 1983-12-05 1984-12-05 Rahmen für einen tennisschläger Expired EP0163710B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3343945 1983-12-05
DE3343945 1983-12-05
DE3416377A DE3416377A1 (de) 1983-12-05 1984-05-03 Tennisschlaeger aus u-foermig profilierten hohlprofilen
DE3416377 1984-05-03

Publications (2)

Publication Number Publication Date
EP0163710A1 EP0163710A1 (de) 1985-12-11
EP0163710B1 true EP0163710B1 (de) 1988-02-24

Family

ID=25816175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85900100A Expired EP0163710B1 (de) 1983-12-05 1984-12-05 Rahmen für einen tennisschläger

Country Status (4)

Country Link
US (1) US4836543A (enrdf_load_stackoverflow)
EP (1) EP0163710B1 (enrdf_load_stackoverflow)
DE (1) DE3416377A1 (enrdf_load_stackoverflow)
WO (1) WO1985002548A1 (enrdf_load_stackoverflow)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014987A (en) * 1982-09-27 1991-05-14 Soong Tsai C Frame for sports racket
US5622527A (en) * 1986-05-08 1997-04-22 Proform Fitness Products, Inc. Independent action stepper
AT399470B (de) * 1988-12-15 1995-05-26 Head Sport Ag Verfahren zur herstellung eines ballspielschlägerrahmens
US5232220A (en) * 1989-10-04 1993-08-03 Gunter Adam Ball game racket, especially for tennis or squash racket
AT401877B (de) * 1990-02-21 1996-12-27 Scheruebl Franz Schwingungsgedämpfte racketausbildung
US5152526A (en) * 1990-04-03 1992-10-06 Soong Tsai C Frame for sports rackets
US5122405A (en) * 1990-12-11 1992-06-16 Supracor Systems, Inc. Shock absorbing means for sporting equipment handles
AU617286B3 (en) * 1991-02-21 1991-10-04 Jeffrey Liu A protective strip for a racket
US5188359A (en) * 1992-04-08 1993-02-23 Wu Chui Li Drum beat sounding racket
US5280907A (en) * 1992-10-26 1994-01-25 Leueis Liu Protective casing for a game racket
US5362071A (en) * 1993-09-27 1994-11-08 Leueis Liu Protective casing for a racket frame
US5935029A (en) * 1997-06-24 1999-08-10 Oddzon, Inc. Sound-producing hockey stick
US5913709A (en) * 1997-06-24 1999-06-22 Oddzon, Inc. Sound-producing golf club
US6461279B1 (en) 2001-07-25 2002-10-08 Hai Pin Kuo Treadmill having dual treads for stepping exercises
US7455626B2 (en) 2001-12-31 2008-11-25 Nautilus, Inc. Treadmill
US7097593B2 (en) 2003-08-11 2006-08-29 Nautilus, Inc. Combination of treadmill and stair climbing machine
USD527060S1 (en) 2004-03-22 2006-08-22 Nautilus, Inc. Exercise device with treadles
USD502517S1 (en) * 2004-04-14 2005-03-01 Wilson Sporting Goods Co. Head portion of a sports racquet
USD559927S1 (en) 2006-01-03 2008-01-15 Wilson Sporting Goods Co. Hoop portions of a sports racquet
US10625137B2 (en) 2016-03-18 2020-04-21 Icon Health & Fitness, Inc. Coordinated displays in an exercise device
US10493349B2 (en) 2016-03-18 2019-12-03 Icon Health & Fitness, Inc. Display on exercise device
US10625114B2 (en) 2016-11-01 2020-04-21 Icon Health & Fitness, Inc. Elliptical and stationary bicycle apparatus including row functionality

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1387809A (en) * 1917-10-06 1921-08-16 Reuben G Simons Building-tile
US1452803A (en) * 1921-09-02 1923-04-24 Percy Newland Eve Racket for tennis and like games
FR800262A (fr) * 1935-04-05 1936-07-01 Raquette pour tennis et autres jeux, en métal léger et procédé de fabrication
GB513232A (en) * 1938-04-04 1939-10-06 Accles & Pollock Ltd Improvements relating to tennis and other like racquet handles
US3625512A (en) * 1968-01-26 1971-12-07 Peter A Latham Extruded racket having two seamless hollow tubes formed with an interconnecting web
US3840230A (en) * 1972-04-05 1974-10-08 Gen Dynamics Corp Game racket
US3889951A (en) * 1972-04-05 1975-06-17 Gen Dynamics Corp Laminated reinforcing facing for a game racket
US4031181A (en) * 1972-04-05 1977-06-21 General Dynamics Corporation Method for molding high strength facing
FR2270908A1 (en) * 1973-12-19 1975-12-12 Martel Rene Moulded resin tennis racket frame - has hollow interfitting string-receiving bosses in two U-section head elements
US3981504A (en) * 1974-03-18 1976-09-21 Ppg Industries, Inc. Glass-carbon reinforced foamed resin tennis racket frame
DK210276A (da) * 1975-05-13 1976-11-14 P Lafourcade Sportsrekvisit med en ramme og af arten tennisketsjer
CH614380A5 (enrdf_load_stackoverflow) * 1976-07-28 1979-11-30 Rossignol Sa
US4506887A (en) * 1977-03-11 1985-03-26 Stanley Trysinsky Racket frame comprised of a single continuous filament and resin
JPS5412930A (en) * 1977-06-30 1979-01-31 Hitachi Chem Co Ltd Racket frame
US4297308A (en) * 1978-03-07 1981-10-27 Dunlop Limited Method of manufacturing games rackets
US4331331A (en) * 1979-09-20 1982-05-25 Leach Industries, Inc. Game racquet and method of making
US4429874A (en) * 1979-09-20 1984-02-07 Leach Industries, Inc. Game racquet frame
US4280699A (en) * 1980-01-25 1981-07-28 Leach Industries Game racquet
DE3169166D1 (en) * 1980-05-20 1985-04-11 Cedric Nicholas Reid Improvements in rackets
BE888762A (fr) * 1981-05-12 1981-11-12 Herstal Sa CARCASSE DE RAQUETTE ET PIECES PROFILEES POUR LA REALISATION D'UNE TELLE CARCASSE F. VAN DYCK ET R> soetaerts

Also Published As

Publication number Publication date
DE3416377C2 (enrdf_load_stackoverflow) 1987-09-24
EP0163710A1 (de) 1985-12-11
WO1985002548A1 (en) 1985-06-20
US4836543A (en) 1989-06-06
DE3416377A1 (de) 1985-06-13

Similar Documents

Publication Publication Date Title
EP0163710B1 (de) Rahmen für einen tennisschläger
DE2908872C2 (de) Spielschläger und Verfahren zu dessen Herstellung
DE2042803C3 (de) Tennisschläger
DE69515982T2 (de) Tennisschläger mit grosser gesamtlänge
DE3928907C2 (de) Tennisschläger
EP0553769A1 (de) Ballspielschläger, insbesondere Tennisschläger
DE2207802A1 (de) Tennisschlaeger
DE2631288A1 (de) Rahmen fuer spiele-schlaeger
DE2338436A1 (de) Schlaeger fuer tennis oder andere sportarten und verfahren zu seiner herstellung
DE102016009720B4 (de) Griffschale für Ballspielschläger
DE19963241B4 (de) Profilkörper zur Herstellung von Sportgeräten und Verfahren zur Herstellung des Profilkörpers
DE69201986T2 (de) Schläger mit länglicher Asymmetrie.
DE3425365A1 (de) Federballschlaeger
DE2719649A1 (de) Rahmen fuer ballschlaeger, insbesondere tennisschlaeger und verfahren zu seiner herstellung
DE10308532B3 (de) Schläger für Ballspiele
EP1557203B1 (de) Schläger für Ballspiele und Herstellungsverfahren
EP0291576B1 (de) Griff für Tennisschläger o. dgl.
DE102004003526B3 (de) Schläger für Ballspiele und Herstellungsverfahren
DE2514059A1 (de) Tennisschlaeger
EP1097730B1 (de) Schläger für Ballspiele
DE4313203A1 (de) Schläger mit verbesserter Spanneinrichtung
DE2842035A1 (de) Geraetestiel, insbesondere stiel fuer gabeln, schaufeln, hacken o.dgl.
DE2608593A1 (de) Tennisschlaeger aus kunststoff
DE2621062A1 (de) Sportgeraet, insbesondere tennisschlaeger und verfahren zu seiner herstellung
DE3715414C2 (enrdf_load_stackoverflow)

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

17P Request for examination filed

Effective date: 19850712

AK Designated contracting states

Designated state(s): FR

17Q First examination report despatched

Effective date: 19861003

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): FR

ET Fr: translation filed
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

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19911231

Year of fee payment: 8

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

Ref country code: FR

Effective date: 19930831

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST