EP0176021B1 - Tennisschläger - Google Patents

Tennisschläger Download PDF

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Publication number
EP0176021B1
EP0176021B1 EP85111713A EP85111713A EP0176021B1 EP 0176021 B1 EP0176021 B1 EP 0176021B1 EP 85111713 A EP85111713 A EP 85111713A EP 85111713 A EP85111713 A EP 85111713A EP 0176021 B1 EP0176021 B1 EP 0176021B1
Authority
EP
European Patent Office
Prior art keywords
tennis racket
racket
profile bar
height
handle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP85111713A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0176021A2 (de
EP0176021A3 (en
Inventor
Siegfried Kuebler
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
Priority to AT85111713T priority Critical patent/ATE63836T1/de
Priority to EP88202025A priority patent/EP0310169B2/de
Publication of EP0176021A2 publication Critical patent/EP0176021A2/de
Publication of EP0176021A3 publication Critical patent/EP0176021A3/de
Application granted granted Critical
Publication of EP0176021B1 publication Critical patent/EP0176021B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • 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
    • A63B49/03—Frames characterised by throat sections, i.e. sections or elements between the head and the shaft
    • 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
    • A63B60/002—Resonance frequency related characteristics
    • 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
    • A63B2049/0211—Frames with variable thickness of the head in a direction perpendicular to the string plane

Definitions

  • the invention relates to a tennis racket with a covering provided in a tenter frame from a profile bar in a plane for games with a ball in contact with the covering in a period of about 2 to 6 ms for half a vibration, and a ball adjoining the tenter frame. of intersecting sections of the profile bar and a frame web connecting them - heart zone and an end handle in the longitudinal axis of the racket.
  • a conventional tennis racket has a height of the uncovered handle of 23 to 32 mm, and the height of the tensioning frame - seen in the direction of impact, that is to say at right angles to the covering - is below the handle thickness.
  • a racket of this customary dimension is given, for example, in DE-A-30 18 354.
  • US-A-15 39 019 describes the development of a tennis racket whose center of vibration lies in the center of the stringing surface. His handgrip continues in an "intermediate portion" up to the racket oval, the oval cross section of which near the racket oval is higher than the cross section of the frame of the racket oval. The club head is heavier due to a larger cross section and supplemented by an additional weight in the form of a metal strip.
  • the torsional vibration superimposed on the longitudinal vibration should advantageously correspond to the resonance vibration and, in the preferred case, be approximately 125 Hz.
  • the configuration of the heart zone as a narrow frame web, the height of which is less than the height of the profile bar.
  • the tennis racket according to the invention - which corresponds to known rackets insofar as its tenter frame or a profile rod resulting from it has a cross-sectional width between 8 and 16 mm measured in the plane of the covering - has an moment of inertia which is four to 16 times higher than the moment of inertia of a tennis racket according to the prior art, the cross-sectional height of which is equal to or less than the thickness of its handle.
  • the usual thickness of the handle is without casing, ie without grip leather, foam rubber covering or the like.
  • Its racket axis forms a line of symmetry and the height of a cross section of the tenter frame is greater than that thickness of the handle. The latter is determined by the human hand and therefore remains without influence on the club design.
  • the above stipulation of the ratio of handle thickness to the height of a cross section also applies to a profile rod from which the stenter frame is made.
  • the largest cross-sectional height of the racket in the area of its heart zone is greater than the thickness of the handle.
  • This "greatest height” can taper towards both the handle and the club head, ie in both directions of the longitudinal axis, whereby its “greatest height” is preferably constant in an area running on both sides of the heart zone.
  • the greatest height of the racket is arranged at the transition to the handle - the racket or cross-sectional height can decrease from this transition or at a distance from it towards the racket head.
  • the acceptance may take place continuously while producing a straight longitudinal contour of the profile, but it is also possible to produce the contour in a curved or curved manner.
  • the height of the cross-section of the profile bar and / or stenter has proven to be a measure above the thickness of the handle up to approximately 45 mm.
  • the height of the cross-section or profile of the racket or stenter which is perpendicular to the covering, can increase suddenly or gradually compared to the grip thickness and / or - suddenly or gradually - decrease from the point of greatest dimension to the racket head.
  • the longitudinal axis of the racket is also an axis of symmetry, ie the cross-section of the clamping frame described has a corresponding cross-section on the other side of the axis of symmetry.
  • the covering determines a plane of symmetry.
  • a tennis racket 10 of known type shown by way of example in FIGS. 1 to 3 has an oval clamping frame 12 made of a correspondingly curved profile rod 13, which ends on both sides of the racket longitudinal axis M in - delimiting a plate-shaped heart 14 - profile arms 15.
  • the latter are fixed in a handle 16 with a thickness i of 26 to 32 mm; the thickness i is measured on handles 16 without wrapping leather and without considering a handle cap 17.
  • Tensioning frame 12 and heart 14 surround a stringing surface Q composed of transverse strings 18 and longitudinal strings 19 crossing them.
  • the preferred point of impact for a tennis ball (not shown) is designated by S in FIG. 1.
  • the clamping frame 12 or its profile rod 13 is rectangular in cross section, the side walls 20 of which, for example, run at a distance a of 7 mm and the transverse walls 21 of which run at a distance b of 17 mm.
  • the outer width m is 11 mm and the outer height n is 21 mm. The latter is otherwise far lower than the thickness i of the handle 16.
  • the natural frequency f0 of the tennis racket 10 clamped in accordance with the diagram according to FIG. 5 can be measured by an attacking on the racket longitudinal axis M. Force P is suddenly removed.
  • FIG. 4 shows a longitudinal vibration curve for a conventional tennis racket 10 according to FIGS. 1 to 3.
  • a ball touches the net of the covering Q and forces the tensioning frame 12 to follow the ball frequency. This movement seeks to counteract dynamic inertial forces of the tenter frame 12.
  • Arrived at point B the ball reverses its direction and leaves the string Q following the ball approximately at point C.
  • the design of a tennis racket 30 according to FIGS. 6 to 8 has a resonance frequency, which remedies the described defect;
  • the cross section of the profile rod 33 contains the following dimensions according to FIG. 8: as the result of a calculation which confirms the agreement of the natural frequency of this tennis racket 30 and the "ball resonance", that is to say the agreement of the excitation frequency with the natural frequency.
  • the deflection under a load P must be 1/6 compared to TS 10 with TS 30 .
  • the cross-sectional areas in FIGS. 3 and 5 lead to The deflection d is a function of 1 J .
  • the resonance frequency is a constant
  • FIG. 7 A frame shape that takes these findings into account is shown in FIG. 7, in which an area E with the above profile height n 1 extends on both sides of a frame web 34.
  • the frame web 34 shown in section in FIG. 7 replaces the previously described heart 14 and has a lower average profile height h than the profile bar 33.
  • the vibration behavior of the tennis racket 30 according to the invention in the longitudinal direction can be seen in FIG. 9.
  • the excitation frequency of the ball now corresponds to its natural frequency.
  • the tennis racket 30 has reached point C or in the immediate vicinity thereof, and in addition to an additional acceleration from the clamping frame 32 of the tennis racket 30, the ball receives an exact trajectory which is no longer falsified by the dimension Z of the deflection is, as shown in Fig. 4. If inaccurate - d. H. outside the longitudinal axis M on the tennis racket 30 or its strings Q - hitting balls, a torsional vibration occurs about the longitudinal axis M. This torsional vibration is superimposed on the longitudinal vibration.
  • this oscillation is also brought to preferably 125 Hz by tuning the frame web 34 from FIG. 7, the entire tennis racket 30 only vibrates sinusoidally at a frequency when it touches the ball and also compensates for torsional deflection by timely swinging back.
  • the handles 16 of the tennis racket 30 (FIGS. 6 to 8) and the embodiments 30 b to 30 c shown in FIGS. 10 to 12 are of conventional thickness i, which - as said - measures 23 to 32 mm compared to this Thickness i have the adjoining profile bars - better known as frame profiles 33 for their changing heights - in all cases a longer outer height n 1.
  • the frame profile 33 b of FIG. 10 is a total of that max. Height n 1 , while the max. Height n 1 of frame profile 33 c (Fig. 11) ends approximately at heart zone H and decreases as height n 0 to the club head 40.
  • the embodiments shown in the drawing show the max. Height n0 outgoing straight line, that is to say a constant decrease in the variable height n 0.
  • the corresponding cross-sectional contours can also be curved, as is indicated in FIG. 12 at 33 a .

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Pulmonology (AREA)
  • Golf Clubs (AREA)
  • Laminated Bodies (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Toys (AREA)
EP85111713A 1984-09-22 1985-09-17 Tennisschläger Expired - Lifetime EP0176021B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT85111713T ATE63836T1 (de) 1984-09-22 1985-09-17 Tennisschlaeger.
EP88202025A EP0310169B2 (de) 1984-09-22 1985-09-17 Schläger für Ballspiele, insbesondere Tennisschläger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843434956 DE3434956A1 (de) 1984-09-22 1984-09-22 Schlaeger fuer spiele mit begrenzt elastischem ball
DE3434956 1984-09-22

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP88202025.8 Division-Into 1985-09-17

Publications (3)

Publication Number Publication Date
EP0176021A2 EP0176021A2 (de) 1986-04-02
EP0176021A3 EP0176021A3 (en) 1986-10-08
EP0176021B1 true EP0176021B1 (de) 1991-05-29

Family

ID=6246171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111713A Expired - Lifetime EP0176021B1 (de) 1984-09-22 1985-09-17 Tennisschläger

Country Status (4)

Country Link
US (1) US4664380A (enrdf_load_stackoverflow)
EP (1) EP0176021B1 (enrdf_load_stackoverflow)
AT (1) ATE63226T1 (enrdf_load_stackoverflow)
DE (5) DE3434898A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190107567A (ko) * 2018-03-12 2019-09-20 윌슨스포오팅굿드즈컴파니 길이방향 축에 대하여 다방향으로 증가된 가요성을 가지도록 구성된 라켓

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3578314D1 (de) * 1984-07-10 1990-07-26 Sumitomo Rubber Ind Ballschlaggeraet.
DE3735069A1 (de) * 1986-10-17 1988-06-16 Siegfried Kuebler Tennisschlaeger
JPS63270068A (ja) * 1987-04-28 1988-11-08 ヤマハ株式会社 ラケツトフレ−ム
IN170468B (enrdf_load_stackoverflow) * 1987-08-04 1992-03-28 Wilson Sporting Goods
JPH0429624Y2 (enrdf_load_stackoverflow) * 1987-11-17 1992-07-17
JPH0429621Y2 (enrdf_load_stackoverflow) * 1988-01-23 1992-07-17
US5211398A (en) * 1988-02-19 1993-05-18 Yamaha Corporation Hollow tennis racket frame with matched frequency of vibration
JP2625825B2 (ja) * 1988-02-19 1997-07-02 ヤマハ株式会社 ラケットフレーム
US5037098A (en) * 1988-04-06 1991-08-06 Prince Manufacturing, Inc. Tennis racquet with tapered profile frame
US5037097A (en) * 1988-08-18 1991-08-06 Athletic Alternatives, Inc. Sports racket
US4903967A (en) * 1989-01-27 1990-02-27 Ferrari Importing Company, Inc. Racket frame having holes for tailoring frame stiffness
US5029859A (en) * 1989-04-10 1991-07-09 Prince Manufacturing, Inc. Protective bumper strip, especially for wide body tennis racquets
FR2649899B1 (fr) * 1989-07-19 1992-05-22 Rossignol Sa Raquette de tennis
AT393967B (de) * 1989-09-11 1992-01-10 Head Sportgeraete Gmbh Ballschlaeger, insbesondere tennisschlaeger
US4997186A (en) * 1989-12-08 1991-03-05 Ferrari Importing Company, Inc. Racket frame having multi-dimensional cross-sectional construction
US5211396A (en) * 1990-03-16 1993-05-18 Ferrari Importing Company Multi-frame racket
US5005834A (en) * 1990-03-16 1991-04-09 Ferrari Importing Company Multi-frame racket
US5071124A (en) * 1990-05-03 1991-12-10 Prince Manufacturing, Inc Badminton racquet
US5540434A (en) * 1990-08-21 1996-07-30 Wilson Sporting Goods Co. Tennis racket
US5062634A (en) * 1990-08-31 1991-11-05 Wilson Sporting Goods Co. Squash racket
US5048830A (en) * 1990-09-20 1991-09-17 Lo Kun Nan Racket frame with shock absorbing characteristics
DE4116901A1 (de) * 1991-05-23 1992-11-26 Donnay Int Sa Tennisschlaeger
DE4037568A1 (de) * 1990-11-26 1992-05-27 Donnay Int Sa Tennisschlaeger
US5299801A (en) * 1991-05-23 1994-04-05 Donnay International S.A. Tennis racket
JP2601955B2 (ja) * 1991-07-09 1997-04-23 住友ゴム工業株式会社 テニスラケットフレーム
GB9120585D0 (en) * 1991-09-27 1991-11-06 Dunlop Ltd Games racket frame
US5417418A (en) * 1992-12-10 1995-05-23 Prince Manufacturing, Inc. Monoshaft composite tennis racquet
US5257781A (en) * 1993-01-19 1993-11-02 Mitt Usa Corporation Retained rocker string sports racket
US5312102A (en) * 1993-02-04 1994-05-17 Lisco, Inc. Variable inertia head racket
US5368295A (en) * 1993-06-02 1994-11-29 Wilson Sporting Goods Co. Tennis racket
AT406734B (de) * 1993-08-05 2000-08-25 Degaris Kenneth Godfrey Schlägerrahmen
US6383099B1 (en) * 1995-05-22 2002-05-07 Wilson Sporting Goods Co. Tennis racquet
US5810683A (en) * 1996-12-23 1998-09-22 Prince Sports Group, Inc. Morph frame for sports racquet
US5913740A (en) * 1997-07-25 1999-06-22 Miklos; Edward J. Flat beam aerodynamic tennis racquet
US6062994A (en) * 1998-04-10 2000-05-16 Ef Composite Technologies, L.P. Reinforced racquet with flat string bed
DE19825075A1 (de) * 1998-06-04 2000-02-10 Peter Weidenschlager Tennisschläger
DE19953626B4 (de) * 1999-11-08 2004-02-05 Head Sport Ag Schläger für Ballspiele
US6447412B1 (en) 2000-04-18 2002-09-10 Ef Composite Technologies, L.P. Sports racket with undulations in frame interior surface
US20080026658A1 (en) * 2002-03-07 2008-01-31 Matthew Kriesel Multi-axially stretchable polymer shock absorbing pad
DE20305073U1 (de) 2003-03-24 2004-09-16 Turzer, Harald Ballschläger
GB0319259D0 (en) * 2003-08-15 2003-09-17 Imp College Innovations Ltd Tennis racket
US8302213B2 (en) * 2004-10-08 2012-11-06 Ig Holdings Llc Helmets and vests

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FR827983A (fr) * 1937-10-15 1938-05-06 Raquette perfectionnée pour jeu de tennis et jeux analogues
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US3809402A (en) * 1969-01-02 1974-05-07 Dunlop Holdings Ltd Tennis rackets and frames therefor
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DE2920680A1 (de) * 1979-05-22 1980-12-04 Marsteller & Killmann Kg Ballschlaeger, insbesondere tennisschlaeger
US4280699A (en) * 1980-01-25 1981-07-28 Leach Industries Game racquet
DE3018354A1 (de) 1980-05-14 1981-11-19 Kuebler & Co, 7700 Singen Schlaeger fuer tennis o.dgl. spiele
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Title
American Journal of Physics, 47(6), Juni 1979, Seiten 482-487 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190107567A (ko) * 2018-03-12 2019-09-20 윌슨스포오팅굿드즈컴파니 길이방향 축에 대하여 다방향으로 증가된 가요성을 가지도록 구성된 라켓

Also Published As

Publication number Publication date
US4664380A (en) 1987-05-12
DE3582805D1 (de) 1991-06-13
ATE63226T1 (de) 1991-05-15
DE3434956A1 (de) 1986-04-03
EP0176021A2 (de) 1986-04-02
EP0176021A3 (en) 1986-10-08
DE3434898C2 (enrdf_load_stackoverflow) 1993-06-24
DE3434898A1 (de) 1986-04-17
DE3582987D1 (de) 1991-07-04
DE8427999U1 (de) 1987-03-26

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