EP0310169A2 - Raquettes pour jeux de balles, en particulier raquettes de tennis - Google Patents

Raquettes pour jeux de balles, en particulier raquettes de tennis Download PDF

Info

Publication number: EP0310169A2
Authority: EP; European Patent Office
Prior art keywords: racket; profile; height; frame; handle
Prior art date: 1984-09-22
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

EP88202025A

Other languages

German (de)

English (en)

Other versions

EP0310169B2 (fr

EP0310169A3 (en

EP0310169B1 (fr

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.)

1984-09-22

Filing date

1985-09-17

Publication date

1989-04-05

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25825035&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0310169(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1984-09-22 Priority claimed from DE19843434956 external-priority patent/DE3434956A1/de

1985-09-17 Application filed by Individual filed Critical Individual

1985-09-17 Priority to AT88202025T priority Critical patent/ATE63226T1/de

1989-04-05 Publication of EP0310169A2 publication Critical patent/EP0310169A2/fr

1989-08-02 Publication of EP0310169A3 publication Critical patent/EP0310169A3/de

1991-05-08 Application granted granted Critical

1991-05-08 Publication of EP0310169B1 publication Critical patent/EP0310169B1/fr

1996-08-07 Publication of EP0310169B2 publication Critical patent/EP0310169B2/fr

2005-09-17 Anticipated expiration legal-status Critical

Status 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
- 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 racket for ball games, in particular a tennis racket, with covering provided in a tensioning frame made of a profile bar in one plane, a heart zone (H) adjoining the tensioning frame and flanked by profile bar sections of the tensioning frame, and a frame part connecting these profile bar sections - in particular with a frame bridge - as well as an end handle in the longitudinal axis of the racket.
a tensioning frame made of a profile bar in one plane
a heart zone (H) adjoining the tensioning frame and flanked by profile bar sections of the tensioning frame
a frame part connecting these profile bar sections - in particular with a frame bridge - as well as an end handle in the longitudinal axis of the racket.
Such 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. Its handle continues up to the racket oval in an "intermediate portion", whose - to reduce the air resistance - the oval cross-section near the racket frame is knotted higher than its cross-section.
the club head has a heavier knot-like cross-section in the club axis and is supplemented by an additional weight in the form of a metal strip.
the usual thickness of the handle is without casing - that is, without grip leather, foam rubber covering or the like.
Its rack axis forms a line of symmetry, and the height of a cross section of the stenter 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 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 racket has its greatest height in the area of the heart zone and tapers both to the handle and to the racket head, that is to say in both directions of the longitudinal axis.
the greatest height of the profiled bar should lie in the vicinity of the connection point between the profiled bar and the frame web, advantageously on both sides of this frame web. It is also advantageous if its greatest height is constant in an area running on both sides of the heart zone.
the greatest height may decrease steadily while creating a straight longitudinal contour of the profile, but it is also possible to produce the contour curved or curved.
the height of the cross section or profile of the racket or stenter which is perpendicular to the covering, increases suddenly or gradually compared to the grip thickness and can also decrease again from the point of greatest extent to the racket head.
the racket according to the invention - which corresponds to known rackets insofar as its tensioning 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 4 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 longitudinal axis of the racket is also an axis of symmetry, ie the cross-section of the clamping frame described is on the other side of the axis of symmetry a corresponding cross-section.
the covering determines a plane of symmetry according to a feature of the invention.
a tennis racket 10 of known type shown 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 - defining 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 tensioning frame 12 or its profile bar 13 is rectangular in cross section, the side walls 20 of which run, for example, 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 f o of the tennis racket 10 clamped in accordance with the diagram according to FIG. 5 can be measured by an action on the longitudinal axis M of the racket Force P is suddenly removed.
the dimension d is proportional to the deflection of the force P made clear in FIG. 5. But it is also related to the natural frequency of the tennis racket 10 in the longitudinal direction; if a tennis racket under the same force P has a deflection of d1 and another has a deflection of d2, the natural frequency of the second tennis racket can be calculated approximately according to the following relationship:
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 covering Q and forces the tenter 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: inner width a 1 8 mm, outer width m1 10 mm, inner height b1 32.2 mm, outer height n1 37 mm 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 TS10 at TS30.
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 profile height n o decreases steadily from the area E to the club head 40 on the one hand and to the handle attachment 41.
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 the frame profile 33 c (FIG. 11) ends approximately at the heart zone H and decreases as the height n o to the club head 40.

Landscapes

Health & Medical Sciences (AREA)
General Health & Medical Sciences (AREA)
Physical Education & Sports Medicine (AREA)
Golf Clubs (AREA)
Compositions Of Macromolecular Compounds (AREA)
Moulding By Coating Moulds (AREA)
Laminated Bodies (AREA)
Fishing Rods (AREA)

EP88202025A 1984-09-22 1985-09-17 Raquettes pour jeux de balles, en particulier raquettes de tennis Expired - Lifetime EP0310169B2 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT88202025T ATE63226T1 (de)	1984-09-22	1985-09-17	Schlaeger fuer ballspiele, insbesondere tennisschlaeger.

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
DE3434956		1984-09-22
DE19843434956 DE3434956A1 (de)	1984-09-22	1984-09-22	Schlaeger fuer spiele mit begrenzt elastischem ball
EP85111713A EP0176021B1 (fr)	1984-09-22	1985-09-17	Raquette de tennis

Related Parent Applications (1)

Application Number	Title	Priority Date	Filing Date
EP85111713.5 Division		1985-09-17

Publications (4)

Publication Number	Publication Date
EP0310169A2 true EP0310169A2 (fr)	1989-04-05
EP0310169A3 EP0310169A3 (en)	1989-08-02
EP0310169B1 EP0310169B1 (fr)	1991-05-08
EP0310169B2 EP0310169B2 (fr)	1996-08-07

Family

ID=25825035

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP88202025A Expired - Lifetime EP0310169B2 (fr)	1984-09-22	1985-09-17	Raquettes pour jeux de balles, en particulier raquettes de tennis

Country Status (2)

Country	Link
EP (1)	EP0310169B2 (fr)
AT (1)	ATE63836T1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS63270068A (ja) *	1987-04-28	1988-11-08	ヤマハ株式会社	ラケツトフレ−ム
JPH06236311A (ja) *	1993-02-10	1994-08-23	Matsushita Electric Ind Co Ltd	情報管理装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1539019A (en) *	1924-02-07	1925-05-26	John P Nikonow	Tennis racket
US3647211A (en) *	1970-06-08	1972-03-07	James H Doessel	Plastic tennis racket having predetermined cross sections effecting flexibility
US4165071A (en) *	1976-01-05	1979-08-21	Frolow Jack L	Tennis racket

1985
- 1985-09-17 EP EP88202025A patent/EP0310169B2/fr not_active Expired - Lifetime
- 1985-09-17 AT AT85111713T patent/ATE63836T1/de not_active IP Right Cessation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1539019A (en) *	1924-02-07	1925-05-26	John P Nikonow	Tennis racket
US3647211A (en) *	1970-06-08	1972-03-07	James H Doessel	Plastic tennis racket having predetermined cross sections effecting flexibility
US4165071A (en) *	1976-01-05	1979-08-21	Frolow Jack L	Tennis racket

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS63270068A (ja) *	1987-04-28	1988-11-08	ヤマハ株式会社	ラケツトフレ−ム
JPH0562553B2 (fr) *	1987-04-28	1993-09-08	Yamaha Corp
JPH06236311A (ja) *	1993-02-10	1994-08-23	Matsushita Electric Ind Co Ltd	情報管理装置

Also Published As

Publication number	Publication date
ATE63836T1 (de)	1991-06-15
EP0310169B2 (fr)	1996-08-07
EP0310169A3 (en)	1989-08-02
EP0310169B1 (fr)	1991-05-08

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Publication	Publication Date	Title
EP0176021B1 (fr)	1991-05-29	Raquette de tennis
DE2042803C3 (de)	1978-03-30	Tennisschläger
DE2546028A1 (de)	1976-04-22	Tennisschlaeger
DE2166945C2 (de)	1982-09-09	Rahmen für einen Tennisschläger und Form zu seiner Herstellung
EP1557204B1 (fr)	2008-03-26	Raquette pour jeux de balle et méthode de fabrication
DE69201986T2 (de)	1995-12-07	Schläger mit länglicher Asymmetrie.
EP0443001B1 (fr)	1993-06-09	Raquette, en particulier raquette de tennis
DE4037568A1 (de)	1992-05-27	Tennisschlaeger
EP0310169B1 (fr)	1991-05-08	Raquettes pour jeux de balles, en particulier raquettes de tennis
DE3702197C2 (de)	1993-12-23	Tennisschläger
DE4022187A1 (de)	1991-01-31	Racket fuer ballspiele
EP0560015A1 (fr)	1993-09-15	Corde ou cordage pour raquettes
EP1097730B1 (fr)	2004-10-20	Raquette pour jeux de balles
EP0487963B1 (fr)	1995-11-08	Raquette de tennis
DE2224316A1 (de)	1973-11-29	Schlaeger fuer tennis oder andere spiele
DE102006004863A1 (de)	2007-08-09	Schläger für Ballspiele
DE4495735B4 (de)	2006-11-23	Ausgleichendes Gegengewicht-System für Schläger für Ballspiele
DE4031180A1 (de)	1992-04-09	Schlaeger, insbesondere tennis-, squash-, badminton- oder racketballschlaeger
AT404230B (de)	1998-09-25	Ballschläger
DE9102760U1 (de)	1991-05-29	Schläger, insbesondere Tennis-, Squash-, Badminton- oder Racketballschläger
DE4018818C2 (de)	1994-03-24	Schläger, insbesondere Tennis- oder Squashschläger
EP0057939A2 (fr)	1982-08-18	Appareil d'entraînement à la boxe
DE8700088U1 (de)	1987-02-19	Schläger, insbesondere Badmintonschläger
DE3521117A1 (de)	1985-10-31	Verfahren zum bespannen von spielschlaegern, insbesondere von tennisschlaegern
DE7815351U1 (de)	1978-11-16	Schutzhülse für die Besaitung von Schlägerrahmen