EP0544248B1 - Badmintonschläger - Google Patents
Badmintonschläger Download PDFInfo
- Publication number
- EP0544248B1 EP0544248B1 EP92120069A EP92120069A EP0544248B1 EP 0544248 B1 EP0544248 B1 EP 0544248B1 EP 92120069 A EP92120069 A EP 92120069A EP 92120069 A EP92120069 A EP 92120069A EP 0544248 B1 EP0544248 B1 EP 0544248B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- racket
- inches
- handle
- head
- center
- 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
Links
- 230000005484 gravity Effects 0.000 claims abstract description 13
- 238000009527 percussion Methods 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 235000009854 Cucurbita moschata Nutrition 0.000 description 2
- 240000001980 Cucurbita pepo Species 0.000 description 2
- 235000009852 Cucurbita pepo Nutrition 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000020354 squash Nutrition 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
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
-
- 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
-
- 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
- A63B49/032—T-shaped connection elements
-
- 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
- A63B2049/0201—Frames with defined head dimensions
- A63B2049/0203—Frames with defined head dimensions height
-
- 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
- A63B2049/0201—Frames with defined head dimensions
- A63B2049/0204—Frames with defined head dimensions width
-
- 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
- A63B2049/0207—Frames with defined overall length
-
- 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
-
- 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
- A63B2049/0212—Frames with defined weight
-
- 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
- A63B2049/0217—Frames with variable thickness of the head in the string plane
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/04—Badminton
-
- 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
- A63B60/06—Handles
-
- 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
- A63B60/06—Handles
- A63B60/08—Handles characterised by the material
-
- 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
- A63B60/06—Handles
- A63B60/10—Handles with means for indicating correct holding positions
Definitions
- This invention relates to badminton rackets, and, more particularly, to a badminton racket which is lighter than prior badminton rackets and which has a balance point or center of gravity closer to the head end of the racket than to the handle end.
- Badminton rackets conventionally have a length of about 660,4 mm (26 inches) and a weight of about 100 grams. The balance point or center of gravity of those rackets lies closer to the handle end of the racket than the head end. Accordingly, the prior badminton rackets are "head light.” They typically include lead or other weight in the handle to increase the weight of the racket and to produce the "head lights" characteristic.
- Representative competitive badminton rackets have the following physical properties: Weight (Grams) Length mm (Inches) Balance mm (Inches) Iend (oz. in.2) kgcm2 95 to 115 659,9 to 666,2 (25.98 to 26.23) 288,0 to 320,0 (11.34 to 12.60 129,3 to 151,1 (707 to 826)
- Weight is the distance of the balance point or center of gravity from the handle end of the racket.
- Iend is the moment of inertia about an axis at the end of the handle which extends perpendicularly to the handle and is a measure of the ability of the racket to resist rotation about the axis.
- Frolow Reissue U.S. Patent No. 31,419 describes a tennis racket which weighs less than conventional tennis rackets. Weight, removed from the handle end and added to the head end, makes the racket "head heavy," i.e. , the balance point or center of gravity lies closer to the head end of the racket than the handle end. Frolow does not describe a badminton racket, which is distinctly different than a tennis racket in shape, weight, and other physical characteristics.
- Strauch et al. U.S. Patent No. 5,062,634 describes a "head heavy" squash racket.
- the racket is light and has a balance point or center of gravity closer to the head than the handle.
- Strauch et al. do not describe a badminton racket which has distinctly different physical characteristics than a squash racket.
- the invention provides a badminton racket which is significantly lighter than prior badminton rackets and which is "head heavy.”
- the weight of the racket is within the range of about 75 to 85 grams, and preferably within the range of about 80 to 85 grams.
- the length of the racket is about 660,4 mm (26 inches), and the balance point or center of gravity is about 340,4 mm to 386,1 mm (13.4 to 15.2 inches) from the handle end.
- the moment of inertia about an axis at the end of the handle is within the range of about 128,0 kgcm2 to 142,7 kgcm2 (700 to 780 oz.
- the numeral 20 designates a badminton racket of the present invention.
- This racket has a frame 21 which includes a hoop-shaped head portion 22 at one end, a generally T-shaped throat portion 23, and an elongated shaft portion 24 at the other, opposite end.
- the shaft portion terminates in a handle portion 25.
- the head portion supports conventional string 26 with longitudinal and transverse portions which provide a conventional strung surface.
- the outer surface of the head portion 22 has a groove 27 (See FIGS. 3 and 4) to accommodate the cross-over portions of the strings; and drilled openings 28 in the head portion 22, through which the string extends, help define a pattern for the string.
- the racket has a conventional butt cap 29 mounted on the butt end 30 of the handle portion 25. It also includes a flexible strip of leather or synthetic material 31 (See FIG. 14) spirally wound around the handle portion to provide a hand grip. Finally, it includes a bumper guard 32 which lies in the groove 27 and includes eyelets sized to fit into the openings 28.
- the guard 32 is a nylon member, or a member made out of any other suitable material.
- the racket string 26 extends through its eyelets and secures it in place (See FIGS. 1-3).
- the frame comprises molded graphite fibers and resin, although other materials may also form the frame, e.g. , aluminum, graphite reinforced aluminum, polymers, fiber reinforced metals, etc.
- the frame's shape and cross section make it lighter than conventional badminton racket frames and head heavy.
- the particular racket illustrated in FIGS. 1 and 2 has a weight within the range of about 75 to 85 grams, and preferably within the range of about 80 to 85 grams.
- the overall length L of the racket is 660,4 mm (26 inches), and the balance point or center of gravity is 340,4 mm to 386,1 mm (13.4 to 15.2 inches) from the butt end 30 of the racket.
- the end moment of inertia of the racket about an axis G-G is from 128,0 kgcm2 to 142,7 kgcm2 (700 to 780 oz. in.2), and preferably from 133,5 kgcm2 to 139,9 kgcm2 (730 to 765 oz. in.2).
- the axis G-G extends perpendicularly to the handle portion 25 at the butt end 30.
- the moment of inertia about an axis Y-Y, lying perpendicularly of the axis G-G along the center of the racket and extending through the center of gravity, is from 1,65 kgcm2 to 2,19 kgcm2 (9 to 12 oz. in.2).
- the moment of inertia about an axis X-X, extending through the balance point or center of gravity and lying parallel to the axis G-G is from 29,3 kgcm2 to 40,2 kgcm2 (160 to 220 oz. in.2).
- the center of percussion of a racket is the point at which a ball striking a freely suspended racket will cause the racket to rotate about the axis G-G without moving the axis G-G.
- Prior badminton rackets generally have a center of percussion less than 470,9 mm (18.54 inches) from an axis at the butt end 30.
- the racket illustrated in FIGS. 1 and 2 has its center of percussion at 480,1 mm (18.90 inches) from the butt end 30 when measuring the center of percussion with respect to the axis G-G at the butt end.
- the center of percussion When measuring the center of percussion with respect to an axis which lies parallel to the axis G-G but 76,2 mm (3 inches) from the butt end 30, the center of percussion is 442,0 mm (17.4 inches) from that axis toward the head end 33.
- the following parameters further define the configuration of the racket of the present invention which includes a generally oval head.
- the longitudinal dimension A of the strung surface which is the inside dimension of the head portion, is 236,7 mm (9.32 inches). This dimension may be within the range of 236,2 mm to 279,4 mm (9.3 to 11.0 inches).
- the transverse dimension B of the strung surface is 183,9 mm (7.24 inches). This dimension may be within the range of 177,8 mm to 218,4 mm (7.0 to 8.6 inches).
- the length D of the handle portion 25 is 5.16 inches.
- FIGS. 3-14 illustrate the height H and width W of the cross section of the frame at Sections 3-3 through 12-12, respectively.
- the height and width of the cross sections vary along the length of the frame as shown in FIG. 2.
- the height H and width W of the cross sections of one example of the racket appear below in Table I.
- the height of the frame at these sections varies between 21,01 mm to 26,49 mm (0.827 to 1.043 inches) and the width varies between 23,01 mm to 25,4 mm (0.906 to 1.000 inches).
- the racket frame is hollow.
- One forms the racket of the present invention using conventional fabrication methods. They include forming the frame by laying graphite fibers and resin around an elongated inflatable bladder, arranging the bladder in the shape of the frame, curing the resin under heat and pressure, and deflating the bladder and removing it to provide a hollow frame. Subsequent steps include the assembly of the frame and the guard and handle components and the stringing of the racket.
- the badminton racket of the present invention may include a frame with a thicker portion at the head end 33 to increase the weight on the head side of the racket and help provide the "head heavy" feature.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Pulmonology (AREA)
- Golf Clubs (AREA)
- Steroid Compounds (AREA)
- Carbon And Carbon Compounds (AREA)
- Saccharide Compounds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Claims (5)
- Badmintonschläger mit einem Rahmen, der einen Kopfabschnitt (22) zum Tragen einer besaiteten Fläche, einen Griffabschnitt (25), der von einem Spieler gehalten werden kann, einen Schaftabschnitt (24), der mit dem Griffabschnitt (25) und dem Kopfabschnitt (22) verbunden ist und ein Gewicht innerhalb eines Bereichs von ungefähr 75 g bis ungefähr 85 g besitzt,
dadurch gekennzeichnet, daß:
der Schläger einen Schwerpunkt besitzt, der sich näher am Kopfende (33) des Schlägers als am Griffende (30) des Schlägers befindet, wobei sich der Schwerpunkt ungefähr 340,4 mm (13,4 Inch) bis ungefähr 386,1 mm (15,2 Inch) vom Griffende (30) des Schlägers entfernt befindet. - Badmintonschläger nach Anspruch 1, bei dem sich der Schlagmittelpunkt gemessen vom Griffende (30) ungefähr 475 mm bis 520,7 mm (18,7 bis 20,5 Inch) vom Griffende entfernt befindet.
- Badmintonschläger nach Anspruch 1, bei dem ein Trägheitsmoment um eine Achse am Griffende (30), welche sich rechtwinkelig zum Griff erstreckt, ungefähr 128,0 kgcm² bis ungefähr 142,7 kgcm² (700 bis ungefähr 780 oz. in.²) beträgt.
- Badmintonschläger nach Anspruch 1, bei dem der Kopfabschnitt (22) eine Längsabmessung parallel zum Schaftabschnitt (24) von weniger als 279,4 mm (11 Inch) und eine Querabmessung rechtwinkelig zum Schaftabschnitt (24) von weniger als 218,4 mm (8,6 Inch) besitzt.
- Badmintonschläger nach Anspruch 1, bei dem die Länge des Schlägers ungefähr 660 mm (26 Inch) beträgt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80059391A | 1991-11-27 | 1991-11-27 | |
US800593 | 1991-11-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0544248A1 EP0544248A1 (de) | 1993-06-02 |
EP0544248B1 true EP0544248B1 (de) | 1995-11-08 |
Family
ID=25178812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92120069A Expired - Lifetime EP0544248B1 (de) | 1991-11-27 | 1992-11-25 | Badmintonschläger |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0544248B1 (de) |
JP (1) | JP2501277B2 (de) |
KR (1) | KR970006234B1 (de) |
AT (1) | ATE129913T1 (de) |
AU (1) | AU654413B2 (de) |
CA (1) | CA2083738A1 (de) |
DE (1) | DE69205948T2 (de) |
DK (1) | DK0544248T3 (de) |
HK (1) | HK122596A (de) |
NZ (1) | NZ245261A (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015008890A (ja) * | 2013-06-28 | 2015-01-19 | 美津濃株式会社 | バドミントンラケットフレーム |
KR101910343B1 (ko) * | 2017-06-27 | 2018-10-22 | 박정숙 | 배드민턴 라켓 |
JP7085399B2 (ja) | 2018-04-27 | 2022-06-16 | ヨネックス株式会社 | バドミントンラケット |
JP7424096B2 (ja) * | 2020-02-18 | 2024-01-30 | 住友ゴム工業株式会社 | バドミントンラケット |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4291574A (en) * | 1976-01-05 | 1981-09-29 | Frolow Jack L | Tennis racket |
USRE31419E (en) * | 1976-01-05 | 1983-10-18 | Tennis racket | |
GB2188848B (en) * | 1986-04-12 | 1989-11-29 | Lo Kun Nan | An improved badminton racket |
US5071124A (en) * | 1990-05-03 | 1991-12-10 | Prince Manufacturing, Inc | Badminton racquet |
US5062634A (en) * | 1990-08-31 | 1991-11-05 | Wilson Sporting Goods Co. | Squash racket |
-
1992
- 1992-11-25 AT AT92120069T patent/ATE129913T1/de not_active IP Right Cessation
- 1992-11-25 DE DE69205948T patent/DE69205948T2/de not_active Expired - Fee Related
- 1992-11-25 EP EP92120069A patent/EP0544248B1/de not_active Expired - Lifetime
- 1992-11-25 CA CA002083738A patent/CA2083738A1/en not_active Abandoned
- 1992-11-25 DK DK92120069.7T patent/DK0544248T3/da active
- 1992-11-25 NZ NZ245261A patent/NZ245261A/en unknown
- 1992-11-27 AU AU29693/92A patent/AU654413B2/en not_active Ceased
- 1992-11-27 JP JP4318058A patent/JP2501277B2/ja not_active Expired - Lifetime
- 1992-11-27 KR KR1019920022545A patent/KR970006234B1/ko active IP Right Grant
-
1996
- 1996-07-11 HK HK122596A patent/HK122596A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JP2501277B2 (ja) | 1996-05-29 |
AU2969392A (en) | 1993-06-03 |
DK0544248T3 (da) | 1995-12-11 |
CA2083738A1 (en) | 1993-05-28 |
KR930009620A (ko) | 1993-06-21 |
EP0544248A1 (de) | 1993-06-02 |
HK122596A (en) | 1996-07-19 |
ATE129913T1 (de) | 1995-11-15 |
JPH0671001A (ja) | 1994-03-15 |
DE69205948T2 (de) | 1996-06-27 |
NZ245261A (en) | 1994-12-22 |
DE69205948D1 (de) | 1995-12-14 |
KR970006234B1 (ko) | 1997-04-25 |
AU654413B2 (en) | 1994-11-03 |
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