EP1360975A2 - Raquette - Google Patents

Raquette Download PDF

Info

Publication number
EP1360975A2
EP1360975A2 EP03009953A EP03009953A EP1360975A2 EP 1360975 A2 EP1360975 A2 EP 1360975A2 EP 03009953 A EP03009953 A EP 03009953A EP 03009953 A EP03009953 A EP 03009953A EP 1360975 A2 EP1360975 A2 EP 1360975A2
Authority
EP
European Patent Office
Prior art keywords
string
frame portion
racket
threaded
paths
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.)
Withdrawn
Application number
EP03009953A
Other languages
German (de)
English (en)
Other versions
EP1360975A3 (fr
Inventor
Norio c/o Fujikura Rubber Ltd. Matsuomoto
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.)
Fujikura Composites Inc
Original Assignee
Fujikura Rubber Ltd
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 Fujikura Rubber Ltd filed Critical Fujikura Rubber Ltd
Publication of EP1360975A2 publication Critical patent/EP1360975A2/fr
Publication of EP1360975A3 publication Critical patent/EP1360975A3/fr
Withdrawn legal-status Critical Current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
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/08—Diagonal stringing

Definitions

  • the present invention relates to a racket used for striking the ball in tennis, squash and similar games, or for striking a shuttlecock in badminton and similar games.
  • racket that is a subject of the present invention is generally defined as a light-weight bat having a gut, nylon, or formerly, cord netting stretched in an oval open frame with a handle attached and is used for striking a ball in tennis, squash and similar games, or for striking a shuttlecock in badminton and similar games.
  • gut is generally defined as a tough cord that is made from the intestines of certain animals (such as a sheep or a pig) and that which is used for strings of musical instruments, for sports rackets, or for sutures in closing wounds.
  • the term "gut” with regard to the present invention refers to strings use for sports rackets in particular.
  • Guts are generally classified into two different types: a natural gut made from the intestines of certain animals such as a sheep or a pig, and a synthetic resin gut such as a multi-filament gut, a mono-filament gut, a spin gut, or a composite gut including a hybrid gut.
  • the racket that is defined in the aforementioned manner is generally required to be superior in repulsive force, durability, flexibility, shock absorption and controllability of the hitting direction of the ball or the shuttlecock. These characteristics have formerly been determined by appropriately selecting the gut (string) and by adjusting the tension thereof, and/or by selecting the material of the frame and making adjustments to the strength thereof.
  • the present invention provides a sports racket which is structurally designed to achieve a high repulsive force easily without making improvements to the material of the gut or to the material of the frame of the racket.
  • a racket including a frame portion, and a string which is threaded through the frame portion to be interlaced so as to form a first set of parallel string paths, a second set of parallel string paths, and a third set of parallel string paths.
  • the string is threaded through the frame portion via the first, second and third sets of parallel string paths so that the string forms an approximately planar racket face.
  • the first, second and third sets of parallel string paths intersect each other by an angle of approximately 120 degrees.
  • the frame portion prefferably has a plurality of string holes through which the string is threaded one after another.
  • the frame portion can include a main frame portion and a sub-frame portion.
  • the sub-frame portion is fixed to the main frame portion after the string is threaded through the sub-frame portion.
  • the first set of parallel string paths prefferably extend in a lateral direction of the racket.
  • a racket having a frame portion through which a string is threaded to form an approximately planar racket face.
  • the string is threaded through the frame portion to be interlaced triaxially in a hexagonal shape.
  • Figures 1 through 3 show a first embodiment of a racket according to the present invention.
  • the racket 10 is provided with an oval frame portion 11, a grip portion 12, and a neck portion 13 connecting the oval frame portion 11 with the grip portion 12.
  • a string (gut) 20 is threaded through the frame portion 11 to form an approximately planar racket face.
  • the string 20 is threaded through the frame portion 11 to be interlaced triaxially in a hexagonal shape so as to form a first set of parallel string paths 20a, a second set of parallel string paths 20b and a third set of parallel string paths 20c.
  • the first through third sets of parallel string paths 20a, 20b and 20c intersect each other by an angle of approximately 120 degrees (or 60 degrees) as shown in Figure 3.
  • the first through third sets of parallel string paths 20a, 20b and 20c are determined so as not to all intersect each other at one common point. Namely, the first through third sets of parallel string paths 20a, 20b and 20c are determined so that the string 20 forms not only a plurality of regular triangles, but both a plurality of regular triangles and a plurality of regular hexagons if the thickness of the string 20 is ignored.
  • Figure 2 shows an embodiment of a string threading pattern of the string 20 that is threaded through the frame portion 11 to be interlaced triaxially in a hexagonal shape so as to form the first through third sets of parallel string paths 20a, 20b and 20c.
  • String holes 11a are made at predetermined points on the frame portion 11 in advance.
  • the string 20 is inserted into a specific string hole 11a, indicated by an arrow "in” shown in Figure 2, to be stretched (extended) across the frame portion 11 in a lateral direction to form the first set of parallel string paths 20a.
  • the string 20 is stretched across the frame portion 11 in a first oblique direction (a direction from upper left to lower right or from lower right to upper left as viewed in Figure 1) to form the second set of parallel string paths 20b.
  • the string 20 is stretched across the frame portion 11 in a second oblique direction (a direction from upper right to lower left or from lower left to upper right as viewed in Figure 1) to form the third set of parallel string paths 20c.
  • the string 20 is drawn out of a specific string hole 11a indicated by an arrow "out" shown in Figure 2 to complete a stringing operation.
  • the tension of the string 20 can be adjusted with a conventional stringing machine.
  • the repulsive force of the string 20, that is threaded through the frame portion 11 of the racket 10 to be interlaced triaxially in a hexagonal shape so as to form the first through third sets of parallel string paths 20a, 20b and 20c intersecting each other by an angle of approximately 120 degrees in the above described manner, can be more intensified than that of a conventional racket in which main strings and cross strings extend orthogonal to each other.
  • the string 20 that is threaded through the frame portion 11 to be interlaced triaxially in a hexagonal shape so as to form the first through third sets of parallel string paths 20a, 20b and 20c intersecting each other by an angle of approximately 120 degrees has a quasi-isotropic structure to exhibit substantially no directivity within an elastic limit. Due to this characteristic, the string grid of the string 20 exhibits a substantially uniform repulsive force with little directivity when the ball or the shuttlecock strikes the string grid from any direction.
  • FIG 4 shows a second embodiment of the racket according to the present invention.
  • the racket 100 is provided with a main frame portion 11M and a sub-frame portion 11S which is fixed to the main frame portion 11M.
  • the sub-frame portions 11S is provided with a plurality of string holes (not shown) corresponding to the string holes 11a of the racket 10 shown in Figure 1.
  • the string 20 is threaded through the sub-frame portion 11S to be interlaced triaxially in a hexagonal shape so as to form the first through third sets of parallel string paths 20a, 20b and 20c intersecting each other by an angle of approximately 120 degrees, in the same manner as the first embodiment of the racket 10.
  • the sub-frame portion 11S is fitted into the main frame portion 11M to be fixed thereto by a plurality of fixing devices 14 such as screws and nuts.
  • This embodiment is effective especially for when all the ends of the stretched strings threaded through the sub-frame portion 11S are welded to the sub-frame portion 11S, or for when the string 20 is threaded through the sub-frame portion 11S that is provided independent of the main frame portion 11M.
  • the size of the hexagonal shape formed by the string 20, the tension thereof, and the type of string used are determined in accordance with required characteristics of the racket 10.
  • a racket which exhibits a high repulsive force with an excellent controllability of the hitting direction of a ball or a shuttlecock is achieved by the above described string threading pattern of the string 20, which is threaded through the frame portion 11 or the sub-frame portion 11S to be interlaced triaxially in a hexagonal shape so as to form the first through third sets of parallel string paths 20a, 20b and 20c intersecting each other by an angle of approximately 120 degrees.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP03009953A 2002-05-10 2003-04-30 Raquette Withdrawn EP1360975A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002134816 2002-05-10
JP2002134816A JP2003325706A (ja) 2002-05-10 2002-05-10 ラケット

Publications (2)

Publication Number Publication Date
EP1360975A2 true EP1360975A2 (fr) 2003-11-12
EP1360975A3 EP1360975A3 (fr) 2003-12-17

Family

ID=29244216

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03009953A Withdrawn EP1360975A3 (fr) 2002-05-10 2003-04-30 Raquette

Country Status (4)

Country Link
US (1) US20030211908A1 (fr)
EP (1) EP1360975A3 (fr)
JP (1) JP2003325706A (fr)
AU (1) AU2003204115A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150065277A1 (en) * 2013-08-29 2015-03-05 Ningbo Huanying Auto Accessories Co., Ltd. Mesh racket

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060211526A1 (en) * 2003-05-12 2006-09-21 Hauptman Madeline M Convertible racket for multiple stringing configurations
US20070149327A1 (en) * 2005-12-27 2007-06-28 Varan Cyrus O X-braced tennis racket
USD1081866S1 (en) * 2023-10-30 2025-07-01 Michael Taylor-Sullivan Pickleball paddle

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US323608A (en) * 1885-08-04 Tennis-racquet
US1188940A (en) * 1915-09-25 1916-06-27 Ole A Johnson Tennis-racket.
US1687322A (en) * 1926-09-25 1928-10-09 Claremont Claude Albert Games racket
US2145785A (en) * 1936-01-28 1939-01-31 Realisation Et L Expl D Inv S Racket for tennis and like games
US3891211A (en) * 1974-06-13 1975-06-24 Peter C Diefenbach Tennis racket with interchangeable string frame
US4184679A (en) * 1976-08-30 1980-01-22 Mishel Madeline H Game racket and method of making same
FR2373302A1 (fr) * 1976-12-10 1978-07-07 Formati Eugene Raquette de tennis
USD258376S (en) * 1977-12-23 1981-02-24 Mers Kutt Racket stringing network
DE2831288A1 (de) * 1978-07-17 1980-02-07 Friedrich Schittek Tennisschlaeger
US4203597A (en) * 1978-09-05 1980-05-20 Reedhead Frederick W Throatless tennis racquet
IT1120583B (it) * 1979-09-21 1986-03-26 Nando Berluti Perfezionamento nelle racchette da tennis
US4359213A (en) * 1980-01-21 1982-11-16 Bachman Charles W Tension clamp for three or more direction string networks
US5413335A (en) * 1994-03-31 1995-05-09 Braun; Joseph M. Interchangeable racquet component system
US6089997A (en) * 1998-01-05 2000-07-18 Triple Weave Rackets Llc Method and apparatus for stringing game racket and the racket so strung
US6280355B1 (en) * 1998-01-05 2001-08-28 Madeline Mishel Hauptman Racket stringing clamp
US20010031676A1 (en) * 1999-12-28 2001-10-18 Luskin David S. Racket strung in double diagonal stringing pattern with frame markings and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150065277A1 (en) * 2013-08-29 2015-03-05 Ningbo Huanying Auto Accessories Co., Ltd. Mesh racket
US9168425B2 (en) * 2013-08-29 2015-10-27 Ningbo Huanying Auto Accessories Co., Ltd. Mesh racket

Also Published As

Publication number Publication date
EP1360975A3 (fr) 2003-12-17
JP2003325706A (ja) 2003-11-18
AU2003204115A1 (en) 2003-11-27
US20030211908A1 (en) 2003-11-13

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