DE2514059A1 - TENNIS RACKET - Google Patents

Description

t-a.entanwalt

PipWng. CH. Ηυ $ *
Gannisd »- Partenkirch *»

R 444 - He.

Garmisch-Partenkirchen, March 27, 1975 He / D

Lambertο MASI, 1-20016 Pero (Milan), Italy, Via Hewton

Tennis racket

The invention relates generally to tennis rackets and tries in particular to improve the grip of the racket in order to achieve a better grip and improved usability of the racket.

It is known that tennis rackets have a wooden, plastic - ^ metal or combination frame and a handle of have a substantially polygonal cross-section covered with leather or other anti-skid material to to achieve a good grip. However, it is also known that when playing tennis, the player's hand

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sweating due to the physical exertion, whereby this sweat makes the grip of the racket wet and thereby worsens the grip. File results in a reduction in grip even if the grip cover is made of an anti-skid material exists because the coating is soaked in sweat. A player must therefore constantly use his hand and the grip of the club dry without being able to prevent the aforementioned disadvantage.

It is also known that the impacts of tennis ■ balls are transferred through the racket frame to the arm of the player and thereby affect the joints, especially the elbow of his arm.

It is therefore the object of the invention to create a tennis racket with an improved grip with the aim of eliminating the disadvantages known designs to a minimum. In particular, it is the object of the invention to provide a tennis racket to create, the handle is designed so that it allows a permanent drying of the hand and the handle as well like a partial attenuation of the impacts transmitted by the racket to a player.

To achieve this object, a tennis racket according to the invention is characterized in that its handle part provided with a large number of continuous ventilation openings is that a constant air circulation between the

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Cause grip surface and the hand of the player and therefore take care of the drying of the sweat. It got there too found that these openings allow the bumps or to reduce and partially absorb vibrations transmitted through the racket frame.

Its preferred embodiment is characterized in that that the racket handle has an axial bore which is open to the outside at at least one of its ends, and from which a multitude of ventilation holes branch off in the transverse direction, which open onto the outer surface of the handle.

Sometimes, depending on the material and the racket construction, it can be useful to keep the grip in the area of the to reinforce provided air holes. This can be done by inserting a perforated tubular reinforcement piece into the the axial bore happen, the openings of which coincide with the air holes or openings in the transverse direction or stay in contact. In addition, if masking tape is wrapped around the racket handle, it should be removed from Be penetrated by holes that are connected to the ventilation openings of the handle in order to allow air to pass through to enable outside.

The number, size and arrangement of the transverse ventilation holes The handle of the racket is selected and dimensioned according to the circumstances on a case-by-case basis. Should it

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For example, it may be desirable to increase the number of transverse ventilation holes reduce while at the same time achieving a good "ventilation effect over the entire handle surface, then it would be possible to to form open grooves in the outer surface of the handle, in which the ventilation holes open. In such a case, ventilation channels would be created between the handle and the perforated cover tape formed, which cause a ventilation effect through all holes or perforations in the cover tape, wherein these holes or perforations in the area of the grooves in the Handle can be provided.

Some embodiments of the invention are as follows explained in more detail with reference to the drawing. They represent:

Pig. 1 is a general view of a tennis racket with the improvements according to the invention,

Pig. Figure 2 is a cross-section taken approximately along line 2-2 in Pig. 1,

Pig. 3 shows a partial longitudinal section of the racket handle along the line 3-3 of the Pig. 2,

Pig. 4 shows a partial longitudinal section similar to that of the Pig. 3 » but with an inner reinforcement element,

Pig. 5 shows a partial section through a handle according to FIG Invention, which has external longitudinal grooves in connection with the ventilation holes,

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Pig. 6 shows a cross section approximately along the line 6-6 in FIG. 5,

7 shows a partial longitudinal section approximately along the line 7-7 in Pig. 6,

Pig. Figure 8 is a partial view of the handle showing the inclined or helical arrangement the grooves and ventilation holes,

9 shows a partial section through a ventilation hole,

Pig. 10 Longitudinal and cross-section through the handle of a and 11 metal clubs.

The general structure of a racket is shown in FIG. 1 and essentially includes a frame 1 oval shape with a net-like covering 2 known per se. A shaft 3 is firmly connected to the frame 1 and provided at its end with a handle 4 of substantially polygonal cross-section for holding the racket.

The Pig. 1 shows only the general shape of a racket and it is to be understood that the invention applies to conventional Wood, metal or any other type of club can be used.

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In the example according to the I ¹ Ig. 2 and 3 of the drawing, the handle has an axial bore or channel 5 which is open at at least one end and which is in communication with transverse channels or holes 6 in the handle 4 provided or formed over the entire length of the bore 5.

The outer surface of the handle 4 is also shown in FIG known way covered with a tape 7 made of non-slip material, which is spirally wound and according to the invention with a continuous perforation in the form of holes 8 is provided in the cover, which are preferably distributed and dimensioned in this way are that they are above the cross holes 6 of the handle lie or are connected to them. A reinforcing ring 9 can possibly at the end or at both open ends of the aforementioned axial bore be provided.

It is clear from this that in this way ventilation openings are created in the grip of a racket Ensure constant ventilation of the handle so that the Player's hand remains dry.

Of course, the racket handle must be drilled through in such a way that, on the one hand, its mechanical Resistance not changed or at least not significantly reduced and on the other hand the position of the center of gravity the racket isn't changed significantly, though

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the position of the center of gravity can be corrected if necessary by means of appropriate counterweights.

Of course, the arrangement and size of the holes should Be adapted to the design of the club, i.e. depending on the size of the handle.

For orientation purposes only, it should be stated that, depending on the handle size, the length of the axial bore or the Channel 5 can be between about 8 cm and 17 cm, while the corresponding diameter of about 10 mm to about 20 mm can be.

relates to the transverse holes 6, they can be arranged one behind the other in parallel rows, the Holes in a row, for example, offset from the holes in the adjacent rows and between successive rows Holes in a row can be spaced or divided between approximately 10 and 25 mm. Of the The diameter of the holes 6 can in turn be between about 3 and 8 mm with adaptation of the hole dimensions to the size of the Racket grip. It goes without saying that the aforementioned sizes are only intended for general guidance and that these are changed or combined accordingly to better adapt them to the club design and the grip size.

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Correspondingly, the handle cover tape can also be a regular one Have perforations with holes in parallel rows with a spacing or pitch between about 2 and 8 mm and a hole diameter between about 1 mm and 4 mm. With this G-size and division of the holes of the G-riff masking tape after the tape 7 is spirally wound, it is generally ensured that some of the holes 8 of the tape come to rest over the holes 6 in the racket handle.

Referring to I ¹ Ig. A variant of the invention will now be described.

As mentioned above, in order not to unduly weaken the shaft structure of the racket, in particular if it is a question of wooden clubs, appropriate dimensions and precautions with regard to the transverse holes 6 and of the axial channel or the bore 5 are provided. To this end, in order to achieve a higher mechanical strength of the to secure the pierced G-riff in the axial canal or the bore 5 a reinforcing element can be inserted, such as the tubular element 10. This element is included accordingly pierced or has openings 11 in its wall that coincide or are in communication with the Transverse holes 6. The reinforcing element 10 can be made of any suitable Material, such as metal or a plastic material with good mechanical strength, such as

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e.g. a polyacetal or a polyamide plastic and can be pressed into the bore 5 or by a screw 12 are held, provided that the inner end of the bore 5 and the tubular reinforcing element 10 are blind or closed is. It is obvious that in order to strengthen To contribute to the mechanical strength, the reinforcing element 1O should have an outside diameter that is the same or is slightly larger than the inner diameter of the axial bore 5. For orientation purposes only, it can be said that with a wooden stick with a 13.5 / 6 handle the Axial drilling at a diameter of 17 mm can be 14 cm long, while the transverse holes 6 have a diameter of 5 mm and can have a pitch of 25 mm, wherein the holes 6 can be provided in ten mutually offset rows and an inner reinforcing member 19 made of polyacetal 3 mm thick is used. With such a modified one Grip have had good experiences.

Referring to the - ^ ig. 5, 6 and 7 becomes another Embodiment of a racket grip according to the invention described.

Fig. 5 is a view showing part of the racket grip, with the left half of the figure showing the Volume 7 is not shown for the sake of clarity. So is from Fig. 5 and in particular from the "sections

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the ig. 6 and 7 of the drawing it can be seen that the surface of the handle is provided with open longitudinal slots or hats 12 above the strings of alternating holes β, into which the ventilation holes β open. These hats 12 can be formed for each row of holes 6 or only for some of these rows. The use of grooves on the outer surface of the handle, in which the ventilation holes open, can be advantageous in some cases because they create a possibility of increasing the distance or the division between the holes 6 , while at the same time providing good ventilation for the entire handle guarantee. In this way, a large number of holes 8 in the cover 7 and in particular also those that are removed from the ventilation openings or holes 6, in the enlarged partial section of FIG. 7 of the drawing, which is a partial longitudinal section of the handle 4- along a groove 12 illustrates.

The ventilation grooves 12 can be shaped differently, for example with a rectangular or rounded cross-sectional shape (FIG. 6) or a triangular cross-sectional shape (FIG. 9), and a depth on the order of 0.5 to 2.5 mm have a width equal to or approximately greater than the diameter of the holes 6.

Another variant is shown in Fig. 8, where the grooves 13 run obliquely to the handle or a screw

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Follow a line, for example in the opposite direction to the winding direction of the outer cover tape 7.

Figures 10 and 11 are schematic representations and show a variant of the "Invention. 7 / The illustrated in these figures are the ends 15 of the metallic part or the frame structure of the racket embedded in a handle 16 and firmly anchored, the consists of glass fiber reinforced plastic material.

This handle 1.6 extends over a certain length and has a continuous longitudinal bore 17, whose both ends are open. This hole, also here, as in Pig. 4 shown, can be additionally reinforced is with lateral Ventilation openings or holes 18 connected to the are arranged and dimensioned as in the previous ones Examples, with the only difference that the holes here are limited to two opposing sectors sine !, so as not to weaken the zones in which the metal parts or clay structure elements 15 are anchored. A perforated outer cover tape (not shown in the drawing) is here, as indicated earlier, around the Handle provided around.

From the above and the representations in the drawing it can be seen that the main feature of an inventive Racket grip in the arrangement of ventilation

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There are openings or channels within the handle, which makes it possible to completely use this and thus the player's hand keep dry and thus increase the grip on the handle. In addition, the arrangement of holes can be made if desired can be extended to further appropriately selected areas of the handle, enabling forwarding to reduce or largely reduce impact impacts or vibrations to the player's arm. It is therefore note that the foregoing description and the illustration concerns only non-restrictive examples, and that further variants and improvements are possible, without thereby departing from the scope of the present invention.

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Claims (14)

Godparents, t a η s -ρ r ü c h e 25U059 1.J tennis racket with a net-shaped stringed Frame which is connected to a shaft having a handle, characterized in that the handle has bores or perforations that form ventilation channels. 2. Tennis racket according to claim 1, characterized in that the handle has a central one Has a longitudinal bore that is open at least at one end, and through holes extending in the transverse direction, which are connected to the central bore '. 3 · tennis racket according to claim 2, characterized in that in the central bore a inner reinforcing element is provided, the openings has, which is in communication with the holes or openings for ventilation. 4. Tennis racket according to any one of the preceding claims, characterized by in the one or more open ends of the central bore inserted Reinforcement rings. 5. tennis racket according to claim 1 and any of claims 2 to 4, wherein the handle with a masking tape is coated, characterized in that 509842/0416 - 14 - _. 25U059 that the tape is perforated and that at least some of the perforation holes coincide with the ventilation holes of the handle Connected. • 6, tennis racket according to claim 2, characterized in that that the diameter of the central bore is between 10 to 20 mm with a length of 8 to 17 cm. 7. tennis racket according to claim 2, characterized in that the transverse holes diameter in the range of 3 to 8 mm with a distance or a pure division between two adjacent holes of about 10 to 25 mm exhibit. 8. Tennis rackets according to any previous ones Claims, characterized in that the transverse holes are arranged in rows. 9. tennis racket according to claim 8, characterized in that the holes of a strainer are offset with respect to the holes of adjacent holes. 10. Tennis racket according to claim 5, characterized in that the perforation holes in the tape diameter between 1 and 4 mm at a distance or a pitch between adjacent holes of about 2 to 8 mm. 509842/0416 - 15 - 25H059 11. Tennis rackets according to any of the foregoing Claims, characterized in that the outer surface of the handle has grooves communicating with the ventilation holes. 12. Tennis racket according to claim 11, characterized in that the grooves in the longitudinal direction of the handle are arranged. 13. Tennis racket according to claim 11, thereby indicates that the! bags run at an angle to the handle. 14. Tennis racket according to claim 12 or 13, characterized characterized in that the grooves have a depth between 0.5 and 2.5 "with a width equal to or slightly larger than the diameter of the ventilation holes. 509842/0416.