US20130274038A1 - Stringing device for sports racket - Google Patents

Stringing device for sports racket Download PDF

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Publication number
US20130274038A1
US20130274038A1 US13/491,787 US201213491787A US2013274038A1 US 20130274038 A1 US20130274038 A1 US 20130274038A1 US 201213491787 A US201213491787 A US 201213491787A US 2013274038 A1 US2013274038 A1 US 2013274038A1
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US
United States
Prior art keywords
string
racket
guiding
inlet
base
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.)
Abandoned
Application number
US13/491,787
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English (en)
Inventor
Jung-Shih Chang
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of US20130274038A1 publication Critical patent/US20130274038A1/en
Abandoned legal-status Critical Current

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    • 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
    • A63B51/015—String-aligning tools
    • 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

Definitions

  • the invention relates to strung sports rackets, for example tennis, squash or badminton rackets, and more particularly to a stringing device for strung sports rackets.
  • the object of the present invention is to provide a stringing device for a sports racket which can effectively reduce the friction between the string chords and the head of the sports racket and in the same time simplify the stringing operation of the sports racket.
  • a stringing device embodied according to the present invention includes an elongated base and a cleat extending from the base.
  • the device may be made of light weight and rigid materials, such as aluminum alloy, titanium alloy or FRP.
  • the base has a pair of opposing longitudinal side ends, a longitudinal upper surface and a longitudinal bottom surface opposed to the upper surface. Each of the surfaces extends between the opposing longitudinal side ends.
  • the base further has a guiding groove running longitudinally along the upper surface. The groove has an open end and a string engaging surface.
  • the cleat extends downward from the bottom surface of the base and has an outer diameter being slightly smaller than the inner diameter of the string holes of a sports racket so as to be inserted thereinto when the stringing operation is proceeded.
  • the cleat further has a guiding channel through which a racket string threads.
  • the guiding channel has an inlet connected with the string engaging surface of the guiding groove of the base and an outlet opposed to the inlet.
  • the inner diameter of the guiding channel is larger than the outer diameter of the racket string.
  • the string engaging surface of the guiding groove of the base has a suspending portion corresponding to the inlet of the guiding channel for guiding a racket string entering/exiting from the open end of the guiding groove to thread through the guiding channel from the inlet or outlet thereof without touching the inner wall of the guiding channel.
  • the suspending portion may be a bulge or a horn projecting from the string engaging surface and extending into the inlet of the guiding channel so that the racket string is in a suspending way to thread through the guiding channel without touching the inner wall thereof.
  • a stringing device which comprises an elongated base and a pair of cleats.
  • the base includes opposing longitudinal ends, a longitudinal upper surface and a longitudinal bottom surface opposed from said upper surface, each of said surfaces extending between said opposing longitudinal ends.
  • the base further has a guiding groove running longitudinally along the upper surface thereof.
  • the guiding groove has opposing longitudinal open ends and a string engaging surface disposed between the open ends for engaging and receiving a string which is looped thereover.
  • Each of the cleats is respectively disposed at each of the opposing longitudinal ends of the base and extends downward from the bottom surface of the base.
  • Each of the cleats also has a guiding channel through which a racket string threads.
  • the guiding channel has an inlet connected with the string engaging surface and an outlet opposed to the inlet.
  • the inner diameter of the guiding channel is larger than the outer diameter of a racket string threading therethrough.
  • the string engaging surface of the guiding groove of the base is constructed to have a pair of suspending portions, each of the suspending portions corresponding respectively to the inlet of the guiding channel of each of the cleats for guiding a racket string to thread through the guiding channel without touching the inner wall thereof.
  • FIG. 1 is a front view of a sports rackets with portions broken away to illustrate features of the present invention
  • FIG. 2 is a perspective view of a first embodiment of the present invention
  • FIG. 3 is an enlarged view of A portion of FIG. 1 ;
  • FIG. 4 is a perspective view of a second embodiment of the present invention.
  • FIG. 5 is an enlarged view of a broken portion of a sports racket equipped with the second embodiment shown in FIG. 4 ;
  • FIG. 6 is a perspective view of a third embodiment of the present invention.
  • FIG. 7 is an enlarged view of a broken portion of a sports racket equipped with the third embodiment shown in FIG. 6 ;
  • FIG. 8 is a perspective view of a fourth embodiment of the present invention.
  • FIG. 9 is an enlarged view of a broken portion of a sports racket equipped with the fourth embodiment shown in FIG. 8 .
  • FIG. 1 shows a tennis racket equipped with a stringing device embodied according to the present invention to form a string face.
  • the racket is generally designated by the reference numeral 90 .
  • Tennis racket 90 includes an elongated handle 92 , a head frame 94 connected to one end of handle 92 and a handgrip 96 connected to another end of handle 92 .
  • Head frame 94 is planar with handle 92 .
  • Tennis racket 90 may be made from fiber reinforced plastic materials or any suitable materials.
  • Head frame 94 includes an outer surface 942 , an inner outer surface 944 and an annular channel 946 extending along outer surface 942 .
  • Inner surface 944 defines a string opening 98 .
  • a plurality of string holes are formed through head frame 94 into string opening 98 .
  • String 100 is threaded through head frame 94 using string holes to form an impacting string face.
  • String holes are usually arranged in two groups.
  • a first, longitudinal group of string holes 102 may be formed through head frame 94 along parallel longitudinal axes and spaced across head frame 94 to receive portions of the longitudinal string chords.
  • a second or transverse group of string holes 104 may be formed through head frame 94 along transverse axes and preferably parallel to one another to receive portions of the transverse string chords.
  • Stringing device 10 embodied according to the present invention is shown in detail in FIGS. 2-3 .
  • Stringing device 10 may be made of any suitable rigid materials. In this embodiment, it is made of aluminum alloy.
  • Stringing device 10 includes an elongated base 12 and a pair of cleats 14 .
  • Base 12 has a longitudinal upper surface 16 , a longitudinal bottom surface 18 and a guiding groove 20 running longitudinally along upper surface 16 .
  • Guiding groove 20 has a pair of opposing longitudinal open ends 202 and a string engaging curved surface 204 disposed between open ends 202 for engaging and receiving a string chord 106 which is looped thereover.
  • Cleats 14 are arranged to be inserted into two adjacent string holes, although other arrangements are possible.
  • Each of cleats 14 respectively extends downward from bottom surface 18 of base 12 and has a guiding channel 142 with an inlet 144 , an outlet 146 opposed to inlet 144 and an inner diameter being larger than the outer diameter of racket string 100 so that it can thread therethrough.
  • string engaging surface 204 of guiding groove 20 is constructed to have a pair of bulges 30 .
  • Each of bulges 30 has a curved bearing surface 302 and is arranged to correspond to inlet 144 of guiding channel 142 of each of cleats 14 for guiding a racket string 100 to thread through guiding channel 142 without touching inner wall 148 thereof.
  • each of bulges 30 extends slightly into inlet 144 of guiding channel 142 so that the diameter of inlet 144 is smaller than that of outlet 144 . This will always ensure the best possible suspending of the string threading through guiding channel 142 along the axis thereof without thereby touching inner wall 148 thereof.
  • Stringing device 10 can be used on a tennis racket or other appropriate strung sports rackets.
  • device 10 is mounted on racket 90 in such a way that base 12 is installed between string chord 106 and the bottom surface of annular channel 946 of head frame 94 and each of cleats 14 is tightly inserted into each of two adjacent string holes 102 .
  • String loop 106 connecting two vertical strings is received over engaging curved surface 204 of guiding groove 20 .
  • each of two vertical strings connected by loop 106 will firstly be suspended by each of bulges 30 and then enter into guiding channel 142 from inlet 144 without touching inner wall 148 thereof.
  • the objects or advantages of the present invention can be achieved.
  • FIGS. 4 and 5 show an alternative stringing device 40 embodied according to the present invention.
  • Device 40 is substantially the same as device 10 described above.
  • Device 40 differs from device 10 solely with regard to the structure of cleat 42 .
  • cleat 42 has a length being shorter than that of cleat 14 of device 10 so that when device 40 is mounted on racket 90 , cleat 42 thereof is inserted into just a portion of string hole 102 of racket 90 . This ensures that the diameter of the inlet of string hole 102 is smaller than that of the outlet thereof so that string chord threads through guiding channel 50 without touching inner wall 52 of cleat 42 .
  • cleat 42 has a body 46 with an elongated opening 48 . As shown in FIG. 5 , this also ensures that string chord threading through guiding channel 50 will not touch inner wall 52 of cleat 42 .
  • FIGS. 6 and 7 show a further alternative stringing device 60 embodied according to the present invention.
  • Stringing device 60 includes an elongated base 62 and a cleat 64 .
  • Base 62 has a longitudinal upper surface 622 , a longitudinal bottom surface 624 and a guiding groove 626 running longitudinally along upper surface 622 .
  • Guiding groove 626 has an open end 628 and a string engaging surface 630 .
  • Cleat 64 is designed to be inserted into one of string holes 102 .
  • Cleat 64 extends downward from bottom surface 624 of base 62 and has a guiding channel 642 with an inlet 644 located on engaging surface 630 , an outlet 646 opposed to inlet 644 and an inner diameter being larger than the outer diameter of racket string 100 so that it can thread therethrough.
  • string engaging surface 630 of guiding groove 626 has a projecting area 632 with a curved bearing surface extending slightly into inlet 644 of guiding channel 642 so that the diameter of inlet 644 is smaller than that of outlet 646 .
  • device 60 is mounted on racket 90 in such a way that cleat 64 is tightly inserted into one of string holes 102 until that base 62 is leaned against the bottom surface of annular channel 946 of head frame 94 .
  • FIGS. 8 and 9 show a fourth embodiment stringing device 70 of the present invention.
  • Device 70 is substantially the same as device 60 described above.
  • Device 70 differs from device 60 solely with regard to base 72 .
  • Base 72 has a longitudinal upper surface 722 , a longitudinal bottom surface 724 and a guiding groove 726 running longitudinally along upper surface 722 .
  • Guiding groove 726 has a pair of opposing longitudinal open ends 728 , 730 and a pair of string engaging surface 732 , 734 .
  • Device 70 also has a cleat 74 including a guiding channel 742 with an inlet 744 and an outlet 746 .
  • inlet 744 is positioned between string engaging surfaces 732 , 734 of guiding groove 726 of base 72 .
  • Each of string engaging surface 732 , 734 of guiding groove 726 has a projecting area 736 , 738 with a curved bearing surface extending slightly inwardly. This also ensures that the diameter of inlet 744 is smaller than that of outlet 746 .
  • the way to use device 70 is shown in FIG. 9 .
  • each of two vertical strings connected by loop 106 will firstly be suspended by projecting area 736 or 738 , then enter into guiding channel 742 from inlet 744 and lastly threads through guiding channel 742 without touching inner wall 748 thereof.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Revetment (AREA)
  • Rehabilitation Tools (AREA)
US13/491,787 2012-04-16 2012-06-08 Stringing device for sports racket Abandoned US20130274038A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
TW101113488 2012-04-16
TW101113488 2012-04-16
TW101116399 2012-05-08
TW101116399A TW201343221A (zh) 2012-04-16 2012-05-08 懸吊式球拍穿線構件及具該構件之球拍

Publications (1)

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US20130274038A1 true US20130274038A1 (en) 2013-10-17

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US13/491,787 Abandoned US20130274038A1 (en) 2012-04-16 2012-06-08 Stringing device for sports racket

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US (1) US20130274038A1 (zh)
CN (1) CN103372286A (zh)
TW (1) TW201343221A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220134191A1 (en) * 2019-03-08 2022-05-05 Yonex Co., Ltd. Grommet and racket

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWM613814U (zh) * 2020-07-22 2021-07-01 陳正盛 免沖孔球拍及其拍框

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE34420E (en) * 1986-06-19 1993-10-26 Darling James P Sports racquet
US5257781A (en) * 1993-01-19 1993-11-02 Mitt Usa Corporation Retained rocker string sports racket
US5290031A (en) * 1991-12-28 1994-03-01 Yamaha Corporation String protector for a racket frame
US5332213A (en) * 1992-01-29 1994-07-26 Franz Volkl Gmbh & Co. Ski Und Tennis Sport-Artkihelfabrik Kg. Ball-game racket, particularly a tennis racket
US5435550A (en) * 1995-01-25 1995-07-25 You; Chin-San Game racket
US5458331A (en) * 1994-07-22 1995-10-17 Bothwell; Brett P. Game racket with adjustable string suspension system
US5879248A (en) * 1997-11-26 1999-03-09 Marsico; Peter Joseph Stringed sports racquet incorporating interlocking string clamps
US6440015B1 (en) * 2001-08-16 2002-08-27 Chen-Chung Chang String fastener for a racket
US6506134B2 (en) * 1997-06-25 2003-01-14 Fabio Paolo Bertolotti Interlocking string network for sports rackets
US20030162613A1 (en) * 2002-02-26 2003-08-28 Davis Stephen J. Two piece sports racquet and method
US20040209715A1 (en) * 2001-08-30 2004-10-21 Sun-Kyum Kim Racket being improved elastic and repellent force
US20060293127A1 (en) * 2005-06-22 2006-12-28 William Riesser Racket and method of stringing the racket
US20080261733A1 (en) * 2007-04-19 2008-10-23 Gear Box Composite racquet and method of making same
US20090165243A1 (en) * 2008-01-02 2009-07-02 Kamran Yazdi Grommet tie off (gto)
FR2935614A1 (fr) * 2008-09-09 2010-03-12 Manuel Alphonse Riquelme Dispositif de cordage de raquettes a brins independants
US7691016B2 (en) * 2007-07-10 2010-04-06 Sri Sports Limited Racket
US7927239B2 (en) * 2007-11-26 2011-04-19 Brett Bothwell Substantially fluid tight game racket including a spring suspension module
US7938747B2 (en) * 2008-02-21 2011-05-10 Brett Bothwell Game racket including a pivot element
US20120077630A1 (en) * 2007-11-26 2012-03-29 Brett Bothwell System and Method for an Inflation Bladder Composite Game Racket
US20140011615A1 (en) * 2012-07-05 2014-01-09 Jung-Shih Chang Stringing means for a badminton racket

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CN2121252U (zh) * 1992-04-27 1992-11-11 洪进山 改良的复合材料球拍穿线结构
CN2156898Y (zh) * 1993-03-30 1994-02-23 刘继志 球拍护套
CN2592221Y (zh) * 2002-12-05 2003-12-17 元贸运动器材(深圳)有限公司 球拍
US20110165975A1 (en) * 2007-11-26 2011-07-07 Brett Bothwell System and Method for a Pre-Formed Reinforcement Member for an Opening in a Game Racket
US20090227403A1 (en) * 2008-03-05 2009-09-10 Chen-Chung Chang Netting framework of a fiber-made racket
CN201263873Y (zh) * 2008-07-17 2009-07-01 厦门侨兴工业有限公司 一种具减震功能之拍框结构
US7887444B1 (en) * 2009-08-13 2011-02-15 Wilson Sporting Goods Co. Racquet having articulating grommet assemblies

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE34420E (en) * 1986-06-19 1993-10-26 Darling James P Sports racquet
US5290031A (en) * 1991-12-28 1994-03-01 Yamaha Corporation String protector for a racket frame
US5332213A (en) * 1992-01-29 1994-07-26 Franz Volkl Gmbh & Co. Ski Und Tennis Sport-Artkihelfabrik Kg. Ball-game racket, particularly a tennis racket
US5257781A (en) * 1993-01-19 1993-11-02 Mitt Usa Corporation Retained rocker string sports racket
US5458331A (en) * 1994-07-22 1995-10-17 Bothwell; Brett P. Game racket with adjustable string suspension system
US5435550A (en) * 1995-01-25 1995-07-25 You; Chin-San Game racket
US6506134B2 (en) * 1997-06-25 2003-01-14 Fabio Paolo Bertolotti Interlocking string network for sports rackets
US5879248A (en) * 1997-11-26 1999-03-09 Marsico; Peter Joseph Stringed sports racquet incorporating interlocking string clamps
US6440015B1 (en) * 2001-08-16 2002-08-27 Chen-Chung Chang String fastener for a racket
US20040209715A1 (en) * 2001-08-30 2004-10-21 Sun-Kyum Kim Racket being improved elastic and repellent force
US20030162613A1 (en) * 2002-02-26 2003-08-28 Davis Stephen J. Two piece sports racquet and method
US20060293127A1 (en) * 2005-06-22 2006-12-28 William Riesser Racket and method of stringing the racket
US20080261733A1 (en) * 2007-04-19 2008-10-23 Gear Box Composite racquet and method of making same
US7691016B2 (en) * 2007-07-10 2010-04-06 Sri Sports Limited Racket
US7927239B2 (en) * 2007-11-26 2011-04-19 Brett Bothwell Substantially fluid tight game racket including a spring suspension module
US20120077630A1 (en) * 2007-11-26 2012-03-29 Brett Bothwell System and Method for an Inflation Bladder Composite Game Racket
US20090165243A1 (en) * 2008-01-02 2009-07-02 Kamran Yazdi Grommet tie off (gto)
US7938747B2 (en) * 2008-02-21 2011-05-10 Brett Bothwell Game racket including a pivot element
FR2935614A1 (fr) * 2008-09-09 2010-03-12 Manuel Alphonse Riquelme Dispositif de cordage de raquettes a brins independants
US20140011615A1 (en) * 2012-07-05 2014-01-09 Jung-Shih Chang Stringing means for a badminton racket

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220134191A1 (en) * 2019-03-08 2022-05-05 Yonex Co., Ltd. Grommet and racket
US12076620B2 (en) * 2019-03-08 2024-09-03 Yonex Co., Ltd. Grommet and racket

Also Published As

Publication number Publication date
TW201343221A (zh) 2013-11-01
CN103372286A (zh) 2013-10-30

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