WO1989006558A1 - Raquette de tennis - Google Patents

Raquette de tennis Download PDF

Info

Publication number
WO1989006558A1
WO1989006558A1 PCT/NL1989/000002 NL8900002W WO8906558A1 WO 1989006558 A1 WO1989006558 A1 WO 1989006558A1 NL 8900002 W NL8900002 W NL 8900002W WO 8906558 A1 WO8906558 A1 WO 8906558A1
Authority
WO
WIPO (PCT)
Prior art keywords
head
heart
handle
cross
shaped portion
Prior art date
Application number
PCT/NL1989/000002
Other languages
English (en)
Inventor
Erik Bernard Van Der Pols
Original Assignee
Pols Erik Bernard V D
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 Pols Erik Bernard V D filed Critical Pols Erik Bernard V D
Publication of WO1989006558A1 publication Critical patent/WO1989006558A1/fr

Links

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
    • 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
    • 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
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations

Definitions

  • the invention relates to a tennis racket consisting of a head portion which supports stringing, a handle and an intermediate portion which is arranged between the handle and the hea.d and which is provided with a heart-shaped portion connected to the head, which heart-shaped portion has at least one zone of which the cross-sectional height is less than the thickness of the handle and less than the maximum cross-sec ⁇ tional height of the head portion.
  • a tennis racket of the kind is known from DE-U-870- 7166.
  • a tennis racket has to satisfy many requirements.
  • One of these requirements is that when a tennis ball is struck the deviation of the head from a position in the length direc ⁇ tion of the longitudinal axis must be restricted. If the rac- ket fails to satisfy this requirement, it will not be possible to strike the ball in a controlled way or place it accurately.
  • Another demand is that vibrations resulting from the natural resonant frequency of the head are transmitted as little as possible to the handle. Otherwise, there arises a danger of causing "tennis elbow".
  • the invention has for its object to produce a tennis racket that meets the above-stated requirements.
  • the dis ⁇ tribution of flexural stiffness over the head is optimized.
  • the flexural stiffness reduces towards both the top of the racket and towards the handle, whereby the transmission of vibrations to the handle is minimized through the narrower cross-section in the heart-shaped portion. It is recommended that the head has a convexly curved form.
  • Figure 1 shows a perspective view of the tennis racket according to the invention
  • Figure 2 shows a cross-sectional view of the tennis racket of figure 1.
  • the head portion 1 comprises a stringing 2 in the usual fashion.
  • the handle 3 is covered using a wound covering 4 and is connected to the head portion 1 via the intermediate portion 5, which comprises a heart-shaped portion 6.
  • the in ⁇ termediate portion 5 contains a zone 7 which has a cross-sec ⁇ tional height less than the thickness of the handle 4 and less than the greatest cross-sectional height of the head portion.
  • the head portion has a profile which tapers from a region 8 towards the top portion 9 and towards the heart-shap ⁇ ed portion 6. Consequently, when the ball is struck by the end portion 9 the transmission of vibrations to the handle 3 is minimized, since a region 8 has a relatively high flexural stiffness.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Manipulator (AREA)
  • Laminated Bodies (AREA)
  • Golf Clubs (AREA)

Abstract

La raquette de tennis décrite se compose d'une partie de tête (1), d'un manche (3) et d'une partie en forme de coeur (6) disposée entre le manche et la tête. Un segment de la partie en forme de coeur a une section transversale dont la hauteur est inférieure à la fois à l'épaisseur du manche et à la hauteur maximum de la section transversale de la partie de tête. A partir du point (8) ayant la hauteur de section transversale maximum, cette hauteur de section transversale décroît continuellement jusqu'à la partie en forme de coeur et jusqu'au sommet de la partie de tête de la raquette.
PCT/NL1989/000002 1988-01-22 1989-01-18 Raquette de tennis WO1989006558A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NLAANVRAGE8800150,A NL187669C (nl) 1988-01-22 1988-01-22 Tennisracket.
NL8800150 1988-01-22

Publications (1)

Publication Number Publication Date
WO1989006558A1 true WO1989006558A1 (fr) 1989-07-27

Family

ID=19851638

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1989/000002 WO1989006558A1 (fr) 1988-01-22 1989-01-18 Raquette de tennis

Country Status (3)

Country Link
AU (1) AU2920789A (fr)
NL (1) NL187669C (fr)
WO (1) WO1989006558A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477533A1 (fr) * 1990-08-21 1992-04-01 Wilson Sporting Goods Company Raquette de tennis
US5913740A (en) * 1997-07-25 1999-06-22 Miklos; Edward J. Flat beam aerodynamic tennis racquet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0429621Y2 (fr) * 1988-01-23 1992-07-17

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171223A (en) * 1937-12-02 1939-08-29 Roy H Robinson Racket for tennis and batting games and method of manufacturing same
US3647211A (en) * 1970-06-08 1972-03-07 James H Doessel Plastic tennis racket having predetermined cross sections effecting flexibility
GB2137511A (en) * 1983-04-09 1984-10-10 Ulrich Pawlicki Game racket
BE905311A (fr) * 1986-08-21 1986-12-16 Lo Kun Nan Tige amelioree d'un cadre composite de raquette.
NL8501679A (nl) * 1985-06-11 1987-01-02 Pols Erik Bernard Van Der Racket.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8707166U1 (de) * 1987-05-19 1987-08-06 Kun-Nan, Lo, Taichung Hsien Schläger mit verbessertem Halsbereich

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171223A (en) * 1937-12-02 1939-08-29 Roy H Robinson Racket for tennis and batting games and method of manufacturing same
US3647211A (en) * 1970-06-08 1972-03-07 James H Doessel Plastic tennis racket having predetermined cross sections effecting flexibility
GB2137511A (en) * 1983-04-09 1984-10-10 Ulrich Pawlicki Game racket
NL8501679A (nl) * 1985-06-11 1987-01-02 Pols Erik Bernard Van Der Racket.
BE905311A (fr) * 1986-08-21 1986-12-16 Lo Kun Nan Tige amelioree d'un cadre composite de raquette.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477533A1 (fr) * 1990-08-21 1992-04-01 Wilson Sporting Goods Company Raquette de tennis
US5540434A (en) * 1990-08-21 1996-07-30 Wilson Sporting Goods Co. Tennis racket
US5913740A (en) * 1997-07-25 1999-06-22 Miklos; Edward J. Flat beam aerodynamic tennis racquet

Also Published As

Publication number Publication date
NL8800150A (nl) 1989-08-16
NL187669B (nl) 1991-07-16
AU2920789A (en) 1989-08-11
NL187669C (nl) 1991-12-16

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