Racket comprising an injected handle and process for producing s

Details Racket comprising an injected handle and process for producing s Racket comprising an injected handle and process for producing s

1991-01-31

1994-06-21

Millin, Vincent

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

273 73R, 273 73J, A63B 4902, A63B 4910

Patent

active

053222784

DESCRIPTION:

BRIEF SUMMARY
The invention principally relates to a racket for a ball game, particularly for tennis, and to its process of production.
It is well known to produce tennis rackets by moulding. Such rackets present a sufficient rigidity to enable the ball to be returned correctly. These rackets do not have a sufficient flexibility to give an impression of comfort to the player. Moreover, the vibrations are only weakly absorbed before being transmitted to the player's arm. This results in a disorder often called "tennis elbow".
The firm DUNLOP has marketed tennis rackets made by injection. Such rackets offer a more comfortable game due to their flexibility, but do not allow precise control of the balls due to lack of rigidity. Moreover, such rackets still transmit a considerable part of the vibrations to the player's arm.
French Patent No. 85 01018 published under No. 2 579 898, its Certificate of Addition No. 85 08117 published under No. 2 582 527, as well as French Patent No. 87 09398 published under No. 2 617 405, describe folding rackets composed of two parts: a handle and a head frame. This document suggests the use, between the handle and the head frame, at least at certain spots, of vibration-absorbing bearings.
The starting point of the present invention is the observation that the mechanical behaviour demanded of the head frame to send the ball with force and precision is not the same as that demanded of the handle for ensuring the player's comfort.
According to the invention, a handle is made by a process of injection. In this way, a handle is obtained which will give a supple racket pleasant to play with. Moreover, this injection technique is of low cost price and does not require any finishing.
A frame made by injection would not give satisfaction from the standpoint of performance. The head frame must thus be produced for example by moulding.
Means for the absorption or non-transmission of vibrations are advantageously interposed between the frame and the handle. The systematic interposition at all places of direct contact or via other parts, for example the parts for rigidly fixing the handle in the extension of the frame, of vibration-absorbing means, contributes to the impression of comfort that the player feels. Moreover, this is much healthier and avoids tennis accidents.
It is a principal object of the invention to produce a racket for ball games, comprising a handle and a head frame, the head frame being made by moulding a plastics material and the handle being made by injection of a plastics material.
The invention also has for its object a racket, characterized in that it is a tennis racket.
The invention also relates to a racket, characterized in that it comprises an articulation enabling the handle to be folded along the head frame and means for rigidly assembling the handle in the extension of the head frame.
The invention also relates to a racket, characterized in that the rigid assembly means comprises a screw dependent on the handle driven by a knurl and cooperating with a nut mounted in the base of the frame and that it further comprises vibration-absorbing means interposed between the screw and the handle so as to avoid an-y direct contact between the screw and the handle.
The invention also relates to a racket, characterized in that the nut is made in the form of a metal insert comprising a shoulder and placed in an opening made at the base of the frame.
The invention also relates to a racket, characterized in that that part of the handle opposite the frame is covered with two half-shells coated with a material rendering hand grip optimal.
The invention also relates to a racket, characterized in that it comprises a knob placed at the end of the handle opposite the frame, maintained in place by two parts passing in openings made in the knob and in openings made in the handle, the two parts for holding the knob being assembled by clipping.
The invention also relates to a racket, characterized in that the articulation is in omega form and it can be separated into two parts.
The invention also re

REFERENCES:
patent: 4007929 (1977-02-01), Figa
patent: 4340226 (1982-07-01), Haines
patent: 4725059 (1988-02-01), Du Gardin et al.
patent: 4746119 (1988-05-01), Jeanrot
patent: 4915382 (1990-04-01), Madsen
patent: 5071125 (1991-12-01), Shen
patent: 5108114 (1992-04-01), Marx

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