DE3682817D1 - DEVICE FOR CHANGING THE WEIGHT OF THE INERTIA OR THE FOCUS OF BALL RACKETS. - Google Patents

DEVICE FOR CHANGING THE WEIGHT OF THE INERTIA OR THE FOCUS OF BALL RACKETS.

Info

Publication number
DE3682817D1
DE3682817D1 DE8686200617T DE3682817T DE3682817D1 DE 3682817 D1 DE3682817 D1 DE 3682817D1 DE 8686200617 T DE8686200617 T DE 8686200617T DE 3682817 T DE3682817 T DE 3682817T DE 3682817 D1 DE3682817 D1 DE 3682817D1
Authority
DE
Germany
Prior art keywords
weight
inertia
focus
changing
racket
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 - Fee Related
Application number
DE8686200617T
Other languages
German (de)
Inventor
Raemdonck Joris Van
Robert Frankish Scott
Jacques Reichling
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.)
Donnay SA
Original Assignee
Donnay SA
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
Priority claimed from BE0/215021A external-priority patent/BE902428A/en
Application filed by Donnay SA filed Critical Donnay SA
Application granted granted Critical
Publication of DE3682817D1 publication Critical patent/DE3682817D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • A63B60/02—Ballast means for adjusting the centre of mass

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Toys (AREA)
  • Telescopes (AREA)
  • Golf Clubs (AREA)
  • Testing Of Balance (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

Device for varying the weight, the moment of inertia and/or the centre of gravity of a racket, comprising interchangeable weight elements (8) designed in order to be blocked in the cylindrical bodies (4) passing through the frame (1) of a racket and intended to protect the strings at the point where the latter pass through the frame (1) of the racket. <IMAGE>
DE8686200617T 1985-05-14 1986-04-14 DEVICE FOR CHANGING THE WEIGHT OF THE INERTIA OR THE FOCUS OF BALL RACKETS. Expired - Fee Related DE3682817D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE0/215021A BE902428A (en) 1985-05-14 1985-05-14 Racquet frame receiving weighted elements - has band with hollows in top in which tenons in weighted elements fit, with strings passing through hollow between them

Publications (1)

Publication Number Publication Date
DE3682817D1 true DE3682817D1 (en) 1992-01-23

Family

ID=3843888

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686200617T Expired - Fee Related DE3682817D1 (en) 1985-05-14 1986-04-14 DEVICE FOR CHANGING THE WEIGHT OF THE INERTIA OR THE FOCUS OF BALL RACKETS.

Country Status (4)

Country Link
EP (1) EP0201953B1 (en)
JP (1) JPS6226083A (en)
AT (1) ATE70200T1 (en)
DE (1) DE3682817D1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858928A (en) * 1986-06-10 1989-08-22 Yamaha Corporation Racket frame
US4889337A (en) * 1988-06-03 1989-12-26 Fin Sports Limited Racquet shock absorbing device
US5054780A (en) * 1990-08-30 1991-10-08 Dennis Chen Weight adjustable tennis racquet
US5062634A (en) * 1990-08-31 1991-11-05 Wilson Sporting Goods Co. Squash racket
GB2249964A (en) * 1990-11-21 1992-05-27 Jeffrey Liu An improved racket head protective strip
GB2252504A (en) * 1991-02-06 1992-08-12 Jeffery Liu A means for adjusting racket gravity center
AU617286B3 (en) * 1991-02-21 1991-10-04 Jeffrey Liu A protective strip for a racket
JP4528393B2 (en) * 1999-11-11 2010-08-18 株式会社河合楽器製作所 keyboard
US6988968B2 (en) * 2000-12-27 2006-01-24 Koji Okamoto Grip end bottom weight and grip end bottom weighting structure
US6935975B2 (en) 2003-04-10 2005-08-30 Wilson Sporting Goods Co. Racquet with channeled handle for receiving racquet string
CN101884833B (en) * 2010-05-04 2011-11-23 厦门富帏复合材料有限公司 Racket frame with balance weights
GB2490951A (en) * 2011-05-19 2012-11-21 Dunlop Slazenger Internat Ltd A grommet with an outer rim cover for a string
JP2013132455A (en) * 2011-12-27 2013-07-08 Bridgestone Sports Co Ltd Racket and racket product
JP5982817B2 (en) * 2011-12-27 2016-08-31 ブリヂストンスポーツ株式会社 racket

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2004609A (en) * 1932-03-21 1935-06-11 Johnston Harry Tennis racket
US3625512A (en) * 1968-01-26 1971-12-07 Peter A Latham Extruded racket having two seamless hollow tubes formed with an interconnecting web
US3642283A (en) * 1970-02-02 1972-02-15 Howard John Wilkens Magnesium tennis racket with weighted throat piece
FR2350118A1 (en) * 1976-05-05 1977-12-02 Lafourcade Paul Tennis racket with filled tubular frame - has rectangular hollow section member bent into part head frame with two legs forming handle core
DE2751171A1 (en) * 1977-11-16 1979-05-17 Reppert Ruediger Lothar Von Di Weights for fixing to edge of tennis racket frame - improves balance and swing and increases striking force by generating greater centrifugal force
ATE36648T1 (en) * 1984-06-22 1988-09-15 Dunlop Ltd SPORTS RACKETS.

Also Published As

Publication number Publication date
JPS6226083A (en) 1987-02-04
ATE70200T1 (en) 1991-12-15
EP0201953B1 (en) 1991-12-11
EP0201953A1 (en) 1986-11-20

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee