CA2052492A1 - Games rackets - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE

A games racket or the like of the type having a strung head frame connected to a shaft, grip or handle (hereinafter shaft), wherein the shaft has a longitudinal slit accessible for feeding a string or band (hereinafter string) loop for stringing across the head frame to provide striking surfaces of said head.

Description

2~2~2 GAMES RACKETS

BACKGROUND OF THE INVENTION

Field of the Invention The present invention relates to games rackets in S general, such as rackets for games played with a shuttle-cock or bird or a ball. More particularly. the rackets are configured to permit stringing with strings or bands by the user (player), so that substitution of ruptured strings or bands is easily accomplished, More particularly still, the strings or bands of a racket are installed around the outside frame of the strikin~
surface and, where necessary, are inserted through a longitudinal slit in the racket shaft or handle. In the preferred embodiment. the racket is strung by two sets of perpendicular rubber bands located across the striking surface by means of commensurate indentations, recesses or notches around the outer periphery of the head frame.

Prior ~rt of the_In~ention It has been recognized at least as early as 1935 that it is desirable to substitute new strings easily 2~2~2 for broken ones without taking the racket to an expert.
An early United States patent 2,080,~42 granted May 18, lg37 to Timpe provided wedge means of rubber for holding the ends or other parts of strings in holes in the fra~ne of the racket to achieve such purpose. The Timpe patent also teaches the use of strings of rubber or resilient material of "flat construction." The end of the flat string is partly encircled about the wedge so that the wedge forces the string against the wall of the hole and thus securely holds it in place. Advantages of stringing with rubber strings are recited in the first paragraph of the Timpe patent.

United States patent 4,220,335 granted September 2, 1~80 to Nobbs appears to disclose a racket with a longitudinal split-handle design without, however, the split in the handle being of an~ use to string the racket.

United States patent 4,844.478 ~ranted July 4, 1989 to Kessler discloses paddles or rackets having variously shaped frames strung with suitable elastic strings stretched in opposite directions across the frame.

2 ~ 2 In United States patent 3,341,201 granted September 12, 1967 ta Ryan a head rnounted rebounding device is disclosed~ wherein elongate, endless flexible members extend about and between frame side members at loca-tions of indentations thereby defining a pair of substantially planar playing (striking) surfaces of grid-like construction.

SUMMARY OF THE INVENTION

The present invention provides games rackets which are easily strung with strings or bands, so that a broken string or band is easily replaced by the user/player.

Accordingly, the present invention provides a games racket or the like o~ the -type having a strung head frame connected to a shaft, grip or handle (hereinafter shaft), wherein the shaft has a longitudinal slit aocessible for feeding a string or band (hereinafter string) loop for stringing across the head Erame to pro,ide strikirg surfa~es of said head.

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' : ~ , , 2 ~ 2 In a preferred aspect, -the head comprises a many sided frame with tlle shaft connected thereto and adjacent at least one side of the frame, wherein the longitudinal slit in the shaft comrnunicates with a slit transversal thereto between the shaft and the head in order to permit placement of strings on either side of the longitudinal slit.

In a further preferred aspect, the frame of the head has indentations, recesses or notches for receiving and retaining strung strings.

In the preferred ernbodiment, the racket comprises a single molded or cast frame of a four-sided head and a shaft adjacent one side of the four-sided head, the longitudinal and transversal slits formin& a T.

Preferably the shaft is formed and adapted to receive a sleeve for comfort and ease of holdin~ by a user/player.

Also preferred is that the notches are adapted to receive flat band loops of rubber or the like.

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_ 5 _ 2~ 2 BRIEF DESCRIPTION OF THE DRAWINGS

A preferred embodiment of the present invention will now be described in detail in conjunction with the attached drawing figures. in which:

Fig. l is a front elevation of an unstrung racket according to the prevent invention;

Fig. 2 is a side elevation with partial cross-section along the line 2-2 in Fig. l;

Fig. 3 is a cross-section through the shaft along the line 3-3 in Fig. l;

Figures 4A, 4B, 4C~ 4D, 4E, 4F, and 4~ show successive steps of stringing (installation) of five transversal and seven longitudinal flat rubber string 1 oops .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring now to Fi~ures 1, 2 and 3 of the drawings, a racket frame (Figure l) according to ~he - 2 ~ 2 present invention comprises a generally rectangular head frame 10 tapering at one side 11 thereof into a central shaf-t 12. The shaft 12 comprises two separate longitudinal halves 13 and 14 separated by a longitudinal slit lS forming the vertical bar of a T, the transveral bar of which is a slit 16 running parallel to the side 11. The halves 13 and 14 of the shaft 12 are integrally connected to the long sides of the head frame 10 via triangular regions 17 and 18. The entire racket frame structure has an H- or I-beam cross-section for improved rigidity and is preferably made by molding or casting frorn nylon with glass fill (say, 40%) or cellustrand, but could also be made from aluminum, metal alloys, graphite fibre, or even wood.

As may be seen frorn Figure 2 the shaf~ 12 is thicker than the head frarne 10 and is adapted to have a rubber sleeve or the like around it, once the racket has been strung, for comfort and ease of holding by a user/player.

As may also be seen from Figures 1 and 2~ the head frame 10 has indentations or recess such as recess 19 on ~ 7 ~ 2~2~

the outside. The narrow sides of the head frame each have five recesses, while the longer sides have seven recesses each. The recesses serve to receive and retain rubber bands (that is ~welve in total) strung across the head frame 10; five strung longitudinally, and seven strung transversally. The vertical slit 15 is, therefore, necessary in order to enable installation of the five longitudinal strings; or to enable replacement of a broken string by the user/player, who simply removes the sleeve and inserts the replacement string through the slits 15 and 16.

Figure 3 shows a transversal cross-section of the shaft 12 and the H-beam construction.

We now turn to Figures 4A to 4G showing the preferred mode of stringing, where in Figure 4A a central transversal string 20 is first installed, followed by a central longitudinal string 21 in Figure 4B. Then two transversal strings 22 and 23 are installed on either side of the string 20, are installed as shown in Figure 4C, and so on as shown in Figures 4D, 4E, 4F until the entire twelve strings have been installed as shown in Flgure 4G.
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- 8 - 2 ar32 ~ ~ 2 The complete strung racket as shown in Figure 4G is only missing the sleeve, or any arrangement tc prevent the two shaft halves 13 and 14 from relative displacement, which would add to the comfort of the S player. As may also be seen, the strings are flat extruded rubber bands for longer life, The width of the bands matches the recesses in the head frame 10, The sleeve would preferably be made from expanded polyurethane foam or other suitable conventional materials.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN
EXCLUSIVE PROPERTY OR PRIVILEGE ARE CLAIMED ARE DEFINED
AS FOLLOWS:

1. A games racket or the like of the type having a strung head frame connected to a shaft, grip or handle (hereinafter shaft), comprising: a longitudinal slit dividing said shaft in two halves; and a transversal slit along an edge of said head frame and communicating with said longitudinal slit.