US20110201462A1 - String for a racket, particularly for a tennis racket - Google Patents
String for a racket, particularly for a tennis racket Download PDFInfo
- Publication number
- US20110201462A1 US20110201462A1 US13/058,640 US200913058640A US2011201462A1 US 20110201462 A1 US20110201462 A1 US 20110201462A1 US 200913058640 A US200913058640 A US 200913058640A US 2011201462 A1 US2011201462 A1 US 2011201462A1
- Authority
- US
- United States
- Prior art keywords
- string according
- string
- central core
- reinforcing layer
- protective layer
- 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.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
- A63B51/02—Strings; String substitutes; Products applied on strings, e.g. for protection against humidity or wear
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2209/00—Characteristics of used materials
- A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
Definitions
- the present invention relates to a string for a racket, in particular a string for a tennis racket.
- a racket In sports described as racket sports, a racket is used that comprises a handle and also a frame. A string is stretched longitudinally and transversely through the frame, the string being intended to be subjected to the impact of the ball.
- peripheral layer is not sufficient to provide satisfactory abrasion resistance and degradation resistance of the central core.
- the service life of the string is thus limited.
- Strings are also known, especially from EP-A-1 574 134 or WO-A-2008/061229, which have a reinforced peripheral layer.
- this outer layer includes fillers, which are for example carbon nanoparticles or else glass beads.
- the objective of the present invention is to provide a string with sufficient wear resistance and that does not significantly lose its string tension value during use.
- one subject of the invention is a string for a racket, in particular for a tennis racket, comprising:
- FIG. 1 is a perspective view of a strand of string according to a first embodiment of the invention
- FIG. 2 is a front view of the strand of string represented in FIG. 1 , along the arrow II;
- FIG. 3 is a perspective view of a strand of string according to a second embodiment of the invention.
- FIG. 4 is a front view of the strand of string represented in FIG. 3 , along the arrow IV;
- FIG. 5 is a perspective view of a strand of string according to a third embodiment of the invention.
- FIG. 6 is a front view of the strand of string represented in FIG. 5 , along the arrow VI;
- FIG. 7 is a perspective view of a strand of string according to a fourth embodiment of the invention.
- FIG. 8 is a front view of the strand of string represented in FIG. 7 , along the arrow VIII.
- FIGS. 1 and 2 represent a strand of string 1 comprising a central core 2 , covered by an intermediate reinforcing layer 4 , itself covered by a peripheral protective layer 6 .
- the central core 2 constituting a substantially homogeneous central body of the strand of string 1 is a monofilament made of a thermoplastic. This monofilament is homogeneous from its periphery to its center.
- the protective layer 6 is positioned uniformly over the periphery of the strand of string 1 . This protective layer 6 is therefore positioned around the reinforcing layer 4 .
- the protective layer 6 advantageously comprises a base polymer, to which at least one additive intended to increase slip is added. Such an additive for increasing slip is intended to lower the friction coefficient of this peripheral layer 6 , in comparison with the case where it is constituted solely of the base polymer.
- the base polymer may be, for example, polyamide, polyurethane, polyester or polypropylene.
- the additive intended to increase slip is, for example, silicone or PTFE (TEFLON).
- the first role of the protective layer 6 is to protect the reinforcing layer 4 against premature wear of this layer, leading to breakage of the string.
- the second role of the protective layer 6 is linked to the way in which the stringing of a racket frame is carried out. Numerous intersections appear between two strands of string over the entire surface of the racket face. The two strands of string are positioned one on top of the other and are substantially perpendicular. After the player has hit a tennis ball, the two strands of string 1 have a tendency to move relative to one another. It is especially important to ensure that the two strands of string can, at the same time, be mobile and return to their initial position without them breaking in the vicinity of their point of contact.
- the protective layer 6 enables sliding movements of the strands of string relative to one another.
- the reinforcing layer 4 positioned between the central core 2 and the protective layer 6 , is made of a composite material.
- the reinforcing layer 4 comprises a matrix and also fillers embedded in the matrix.
- the fillers have a reinforcing role, the purpose of which is to contribute to the hardness of the reinforcing layer 4 .
- the matrix provides, at the same time, the cohesion of the structure of the reinforcing layer 4 and the transmission of the forces exerted by the ball to the fillers.
- the fillers increase the mechanical strength of the reinforcing layer 4 .
- the role of the reinforcing layer 4 is to protect the central core 2 effectively from abrasion or premature degradation of the strings of the racket.
- the reinforcing layer 4 made of a composite material is a composite sheath uniformly and continuously enveloping the central core 2 , as represented in FIG. 2 .
- the sheath adopts the shape of the central core by surrounding it continuously. This structure for the reinforcing layer 4 makes it possible to increase more particularly the hardness of the layer and more globally the strength of the string.
- the fillers positioned in the reinforcing layer 4 constitute between 10% and 60% by weight of this reinforcing layer 4 , preferably between 25% and 35%.
- the fillers may be glass beads, the largest dimension of which, in particular the diameter, may be between 1 ⁇ m and 50 ⁇ m, preferably between 5 ⁇ m and 20 ⁇ m.
- the Applicant has noted an increase of at least 25% in the hardness of the reinforcing layer 4 made of polyamide comprising 30% by weight of glass beads relative to a reinforcing layer constituted solely of polyamide.
- the glass beads are distributed substantially evenly in the matrix.
- the presence of glass beads in the reinforcing layer 4 could give rise to an accelerated shearing at the crossing of two strands of string.
- the protective layer 6 thus prevents such an inconvenience and therefore prolongs the service life of the string.
- the hardness of the reinforcing layer 4 is greater than the hardness of the peripheral layer 6 . This enables each of these two layers to provide in particular their respective role of increasing the wear resistance for the reinforcing layer 4 and of increasing slip for the protective layer 6 .
- the reinforcing layer makes it possible to increase the overall strength, which increases the service life.
- the protective layer makes it possible to avoid an abrasion phenomenon, due to direct contact between two adjacent hard layers.
- the invention makes it possible to overcome the drawbacks of the prior art, represented for example by WO-A-2008/061229. In this solution that requires a peripheral reinforcing layer, there is a substantial abrasion phenomenon, due to the contact between these two adjacent hard layers, which results in premature wear of the string.
- the reinforcing fillers may be, besides glass beads, carbon fibers or ceramic particles.
- the matrix of the reinforcing layer is a thermoplastic material which may be, by way of non-limiting examples, polyamide, polyurethane, polyester or polypropylene.
- FIGS. 3 and 4 which differ from FIGS. 1 and 2 due to the nature of the core, represent a strand of string 10 comprising a central core 12 surrounded uniformly by the intermediate reinforcing layer 14 , itself uniformly surrounded by the peripheral protective layer 16 .
- the central core 12 comprises multifilaments of a first type of material which are positioned in a matrix constituted of a second type of material.
- the multifilaments may be constituted of polyamide and arranged in a polyurethane matrix. This type of flexible and comfortable string is capable of having a satisfactory service life due to the integration of the reinforcing layer 14 between the central core 12 and the protective layer 16 .
- FIGS. 5 and 6 differ from FIGS. 1 to 4 due to the nature of the central core. They represent a strand of string 20 comprising a central core 22 reinforced by the reinforcing layer 24 positioned around its entire periphery. The peripheral protective layer 26 is positioned around the reinforcing layer 24 .
- the central core 22 comprises three yarns 22 1 , 22 2 , 22 3 twisted relative to one another helically about a longitudinal axis X-X that corresponds to the central axis of the strand of string 20 .
- the yarns 22 1 , 22 2 , 22 3 have circular cross sections that each define a diameter d 1 smaller than the diameter of the central core 22 .
- These yarns are embedded in a matrix 25 , covered by the reinforcing layer 24 .
- the matrix 25 defines a binding material. This type of string is flexible and offers satisfactory strength due to the presence of the reinforcing layer 24 .
- FIGS. 7 and 8 which differ from FIGS. 1 to 6 due to the nature of the core, represent a portion of string 30 provided with a core referred to as a wrapped core 32 covered over its periphery by the reinforcing layer 34 , itself covered by the protective layer 36 .
- the wrapped core 32 comprises a central monofilament 33 of diameter d 2 , around which monofilaments 35 of diameter d 3 are positioned helically.
- the diameter d 2 is substantially greater than the diameter d 3 .
- the monofilaments 35 constitute wrapping fibers firmly bound by adhesive. The presence of the reinforcing layer 34 makes it possible to lengthen the service life of such a string provided with a core 32 .
- the cores 2 , 12 , 22 and 32 are made of a thermoplastic material which may be, by way of non-limiting examples, polyamide, polyurethane, polyester and/or polypropylene.
- a composite central core may be provided that comprises a central body of a first type of material surrounded by a sheath over its entire periphery made from a second material.
- Each central core 2 , 12 , 22 and 32 has a diameter d 4 substantially between 0.5 mm and 1.5 mm.
- Each intermediate reinforcing layer 4 , 14 , 24 , and 34 has a radial thickness e 1 between 0.01 mm and 0.5 mm, in particular between 0.05 mm and 0.5 mm.
- Each peripheral protective layer 6 , 16 , 26 and 36 has a radial thickness e 2 between 0.01 mm and 0.5 mm, in particular between 0.05 mm and 0.5 mm.
- One non-limiting example of a process for manufacturing a strand of string 1 , 10 , 20 , 30 according to the present invention consists in using an extruder.
- the central core 2 , 12 , 22 or 32 passes into an extruder head while the material used for the reinforcing layer 4 , 14 , 24 or 34 is worked at pressure and at temperature in order to produce the first sheathing of the central core.
- this first sheathing then passes into the extruder head.
- the material used to manufacture the peripheral protective layer 6 , 16 , 26 or 36 is in turn worked at pressure and at temperature in order to produce the second sheathing around the first sheathing.
- Such a manufacturing process makes it possible, firstly, to make the reinforcing layer 4 , 14 , 24 or 34 adhere around the central core in the manner of a sheathing then to make the protective layer 6 , 16 , 26 or 36 adhere to the periphery of the reinforcing layer also in the manner of a sheathing.
Abstract
The invention relates to a string for a racket, particularly for a tennis racket, which includes: a central core (2) and a peripheral protective layer (6). Additionally, the string includes an intermediate reinforcing layer (4) made of a composite material and placed between the central core (2) and the peripheral protective layer (6), the hardness of the reinforcing layer (4; 14; 24; 34) being greater than the hardness of the protective layer (6; 16; 26; 36), the reinforcing layer providing a function of increasing the resistance to wear and tear, while the protective layer provides a function of increasing sliding.
Description
- The present invention relates to a string for a racket, in particular a string for a tennis racket.
- In sports described as racket sports, a racket is used that comprises a handle and also a frame. A string is stretched longitudinally and transversely through the frame, the string being intended to be subjected to the impact of the ball.
- It is known to use a string that has a composite structure, the string comprising a central core covered by a peripheral layer over the entire length of the core.
- However, the presence of the peripheral layer is not sufficient to provide satisfactory abrasion resistance and degradation resistance of the central core. The service life of the string is thus limited.
- Strings are also known, especially from EP-A-1 574 134 or WO-A-2008/061229, which have a reinforced peripheral layer. For this purpose, this outer layer includes fillers, which are for example carbon nanoparticles or else glass beads.
- This alternative solution does not however prove to be sufficient. Indeed, this type of string is subject to breakage phenomena, in particular at the crossings of the strands of string on the racket face. The peripheral layers create abrasion and are cut into very rapidly leading to premature breakage of the string.
- The objective of the present invention is to provide a string with sufficient wear resistance and that does not significantly lose its string tension value during use.
- For this purpose, one subject of the invention is a string for a racket, in particular for a tennis racket, comprising:
-
- a central core, and
- a peripheral protective layer,
- characterized in that the string comprises, in addition, an intermediate reinforcing layer made of a composite material, positioned between the central core and the peripheral protective layer, the hardness of the reinforcing layer being greater than the hardness of the protective layer, the reinforcing layer carrying out a role of increasing the wear resistance, whereas the protective layer carries out a role of increasing slip.
- According to other advantageous features of the racket string in accordance with the invention, taken separately or according to all the technically possible combinations:
-
- the intermediate reinforcing layer is a composite sheath;
- the intermediate reinforcing layer comprises a matrix and reinforcing fillers, the fillers representing between 10% and 60% by weight of the reinforcing layer, preferably between 25% and 35%;
- the fillers are glass beads;
- the glass beads have a larger dimension, in particular a diameter, between 1 μm and 50 μm, preferably between 5 μm and 20 μm;
- the fillers are carbon fibers or ceramic particles;
- the matrix comprises polyamide;
- the central core is constituted of a monofilament;
- the central core comprises multifilaments positioned in a binding material;
- the central core comprises at least three helically twisted yarns;
- the central core comprises a central filament of diameter d2 around which filaments of diameter d3 are positioned helically, so that d2 is greater than d2;
- the central core is composed of polyamide;
- the peripheral protective layer comprises a base polymer, and also at least one additive intended to increase slip;
- the base polymer is a plastic, in particular polyamide, polyurethane, polyester or polypropylene, whereas the slip additive is silicone or PTFE;
- the slip additive is present, in the peripheral protective layer, between 10% and 60% by weight, preferably between 25% and 35%;
- the central core has a diameter d4 between 0.5 mm and 1.5 mm;
- the reinforcing layer has a radial thickness e1 between 0.01 mm and 0.5 mm;
- the peripheral protective layer has a radial thickness e2 between 0.01 mm and 0.5 mm;
- the reinforcing layer is extruded around the central core;
- the protective layer is extruded around the reinforcing layer.
- The invention will be better understood on reading the description which follows, given solely by way of non-limiting examples and with reference to the drawings in which:
-
FIG. 1 is a perspective view of a strand of string according to a first embodiment of the invention; -
FIG. 2 is a front view of the strand of string represented inFIG. 1 , along the arrow II; -
FIG. 3 is a perspective view of a strand of string according to a second embodiment of the invention; -
FIG. 4 is a front view of the strand of string represented inFIG. 3 , along the arrow IV; -
FIG. 5 is a perspective view of a strand of string according to a third embodiment of the invention; -
FIG. 6 is a front view of the strand of string represented inFIG. 5 , along the arrow VI; -
FIG. 7 is a perspective view of a strand of string according to a fourth embodiment of the invention; and -
FIG. 8 is a front view of the strand of string represented inFIG. 7 , along the arrow VIII. -
FIGS. 1 and 2 represent a strand ofstring 1 comprising acentral core 2, covered by an intermediate reinforcinglayer 4, itself covered by a peripheralprotective layer 6. - The
central core 2 constituting a substantially homogeneous central body of the strand ofstring 1 is a monofilament made of a thermoplastic. This monofilament is homogeneous from its periphery to its center. - The
protective layer 6 is positioned uniformly over the periphery of the strand ofstring 1. Thisprotective layer 6 is therefore positioned around the reinforcinglayer 4. Theprotective layer 6 advantageously comprises a base polymer, to which at least one additive intended to increase slip is added. Such an additive for increasing slip is intended to lower the friction coefficient of thisperipheral layer 6, in comparison with the case where it is constituted solely of the base polymer. - By way of example, the base polymer may be, for example, polyamide, polyurethane, polyester or polypropylene. Furthermore, the additive intended to increase slip is, for example, silicone or PTFE (TEFLON).
- The first role of the
protective layer 6 is to protect the reinforcinglayer 4 against premature wear of this layer, leading to breakage of the string. - The second role of the
protective layer 6 is linked to the way in which the stringing of a racket frame is carried out. Numerous intersections appear between two strands of string over the entire surface of the racket face. The two strands of string are positioned one on top of the other and are substantially perpendicular. After the player has hit a tennis ball, the two strands ofstring 1 have a tendency to move relative to one another. It is especially important to ensure that the two strands of string can, at the same time, be mobile and return to their initial position without them breaking in the vicinity of their point of contact. Theprotective layer 6 enables sliding movements of the strands of string relative to one another. - The reinforcing
layer 4, positioned between thecentral core 2 and theprotective layer 6, is made of a composite material. The reinforcinglayer 4 comprises a matrix and also fillers embedded in the matrix. - The fillers have a reinforcing role, the purpose of which is to contribute to the hardness of the reinforcing
layer 4. The matrix provides, at the same time, the cohesion of the structure of the reinforcinglayer 4 and the transmission of the forces exerted by the ball to the fillers. The fillers increase the mechanical strength of the reinforcinglayer 4. In other words, the role of the reinforcinglayer 4 is to protect thecentral core 2 effectively from abrasion or premature degradation of the strings of the racket. - The reinforcing
layer 4 made of a composite material is a composite sheath uniformly and continuously enveloping thecentral core 2, as represented inFIG. 2 . The sheath adopts the shape of the central core by surrounding it continuously. This structure for the reinforcinglayer 4 makes it possible to increase more particularly the hardness of the layer and more globally the strength of the string. - The fillers positioned in the reinforcing
layer 4 constitute between 10% and 60% by weight of this reinforcinglayer 4, preferably between 25% and 35%. By way of example, the fillers may be glass beads, the largest dimension of which, in particular the diameter, may be between 1 μm and 50 μm, preferably between 5 μm and 20 μm. - The Applicant has noted an increase of at least 25% in the hardness of the reinforcing
layer 4 made of polyamide comprising 30% by weight of glass beads relative to a reinforcing layer constituted solely of polyamide. - In order to ensure a homogeneous hardness over the entire periphery of the reinforcing
layer 4, the glass beads are distributed substantially evenly in the matrix. The presence of glass beads in the reinforcinglayer 4 could give rise to an accelerated shearing at the crossing of two strands of string. Theprotective layer 6 thus prevents such an inconvenience and therefore prolongs the service life of the string. - Thus, the hardness of the reinforcing
layer 4 is greater than the hardness of theperipheral layer 6. This enables each of these two layers to provide in particular their respective role of increasing the wear resistance for the reinforcinglayer 4 and of increasing slip for theprotective layer 6. - There is therefore a complementarity between the reinforcing layer and the protective layer involved in the invention. Thus, the reinforcing layer makes it possible to increase the overall strength, which increases the service life. Furthermore, the protective layer makes it possible to avoid an abrasion phenomenon, due to direct contact between two adjacent hard layers. Under these conditions, the invention makes it possible to overcome the drawbacks of the prior art, represented for example by WO-A-2008/061229. In this solution that requires a peripheral reinforcing layer, there is a substantial abrasion phenomenon, due to the contact between these two adjacent hard layers, which results in premature wear of the string.
- The reinforcing fillers may be, besides glass beads, carbon fibers or ceramic particles. The matrix of the reinforcing layer is a thermoplastic material which may be, by way of non-limiting examples, polyamide, polyurethane, polyester or polypropylene.
-
FIGS. 3 and 4 , which differ fromFIGS. 1 and 2 due to the nature of the core, represent a strand ofstring 10 comprising acentral core 12 surrounded uniformly by the intermediate reinforcinglayer 14, itself uniformly surrounded by the peripheralprotective layer 16. - The
central core 12 comprises multifilaments of a first type of material which are positioned in a matrix constituted of a second type of material. By way of example, the multifilaments may be constituted of polyamide and arranged in a polyurethane matrix. This type of flexible and comfortable string is capable of having a satisfactory service life due to the integration of the reinforcinglayer 14 between thecentral core 12 and theprotective layer 16. -
FIGS. 5 and 6 differ fromFIGS. 1 to 4 due to the nature of the central core. They represent a strand ofstring 20 comprising acentral core 22 reinforced by the reinforcinglayer 24 positioned around its entire periphery. The peripheralprotective layer 26 is positioned around the reinforcinglayer 24. - The
central core 22 comprises threeyarns string 20. Theyarns central core 22. These yarns are embedded in amatrix 25, covered by the reinforcinglayer 24. Thematrix 25 defines a binding material. This type of string is flexible and offers satisfactory strength due to the presence of the reinforcinglayer 24. -
FIGS. 7 and 8 , which differ fromFIGS. 1 to 6 due to the nature of the core, represent a portion ofstring 30 provided with a core referred to as a wrappedcore 32 covered over its periphery by the reinforcinglayer 34, itself covered by theprotective layer 36. - The wrapped
core 32 comprises acentral monofilament 33 of diameter d2, around whichmonofilaments 35 of diameter d3 are positioned helically. The diameter d2 is substantially greater than the diameter d3. Themonofilaments 35 constitute wrapping fibers firmly bound by adhesive. The presence of the reinforcinglayer 34 makes it possible to lengthen the service life of such a string provided with acore 32. - The
cores - As a variant that is not represented, a composite central core may be provided that comprises a central body of a first type of material surrounded by a sheath over its entire periphery made from a second material.
- Each
central core layer protective layer - One non-limiting example of a process for manufacturing a strand of
string central core layer - Secondly, this first sheathing then passes into the extruder head. The material used to manufacture the peripheral
protective layer - Such a manufacturing process makes it possible, firstly, to make the reinforcing
layer protective layer
Claims (21)
1-20. (canceled)
21. A string for a racket, in particular for a tennis racket, comprising:
a central core, and
a peripheral protective layer,
wherein the string comprises, in addition, an intermediate reinforcing layer made of a composite material, positioned between the central core and the peripheral protective layer, the hardness of the reinforcing layer being greater than the hardness of the protective layer, the reinforcing layer carrying out a role of increasing the wear resistance, whereas the protective layer carries out a role of increasing slip.
22. A string according to claim 1, wherein the intermediate reinforcing layer is a composite sheath.
23. A string according to claim 1, wherein the intermediate reinforcing layer comprises a matrix and reinforcing fillers, the fillers representing between 10% and 60% by weight of the reinforcing layer, preferably between 25% and 35%.
24. A string according to claim 23 , wherein the fillers are glass beads.
25. A string according to claim 24 , wherein the glass beads have a largest dimension, in particular a diameter, between 1 μm and 50 μm, preferably between 5 μm and 20 μm.
26. A string according to claim 23 , wherein the fillers are carbon fibers or ceramic particles.
27. A string according to claim 23 , wherein the matrix comprises polyamide.
28. A string according to claim 21 , wherein the central core is constituted of a monofilament.
29. A string according to claim 21 , wherein the central core comprises multi-filaments positioned in a binding material.
30. A string according to claim 21 , wherein the central core comprises at least three helically twisted yarns.
31. A string according to claim 21 , wherein the central core comprises a central filament of diameter d2 around which filaments of diameter d3 are positioned helically, so that d2 is greater than d3.
32. A string according to claim 21 , wherein the central core is composed of polyamide.
33. A string according to claim 21 , wherein the peripheral protective layer comprises a base polymer, and also at least one additive intended to increase slip.
34. A string according to claim 33 , wherein the base polymer is a plastic, in particular polyamide, polyurethane, polyester or polypropylene, whereas the slip additive is silicone or PTFE.
35. A string according to claim 33 , wherein the slip additive is present, in the peripheral protective layer, between 10% and 60% by weight, preferably between 25% and 35%.
36. A string according to claim 21 , wherein the central core has a diameter d4 between 0.5 mm and 1.5 mm.
37. A string according to claim 21 , wherein the reinforcing layer has a radial thickness e1 between 0.01 mm and 0.5 mm.
38. A string according to claim 21 , wherein the peripheral protective layer has a radial thickness e2 between 0.01 mm and 0.5 mm.
39. A string according to claim 21 , wherein the reinforcing layer is extruded around the central core.
40. A string according to claim 21 , wherein the protective layer is extruded around the reinforcing layer.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0855542 | 2008-08-12 | ||
FR0855542A FR2934958B1 (en) | 2008-08-12 | 2008-08-12 | ROPE FOR RACKETS, IN PARTICULAR FOR TENNIS RACKETS |
PCT/FR2009/051580 WO2010018343A1 (en) | 2008-08-12 | 2009-08-11 | String for a racket, particularly for a tennis racket |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110201462A1 true US20110201462A1 (en) | 2011-08-18 |
Family
ID=40386040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/058,640 Abandoned US20110201462A1 (en) | 2008-08-12 | 2009-08-11 | String for a racket, particularly for a tennis racket |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110201462A1 (en) |
JP (1) | JP2011530359A (en) |
CN (1) | CN102119048A (en) |
FR (1) | FR2934958B1 (en) |
WO (1) | WO2010018343A1 (en) |
Cited By (1)
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US11058926B2 (en) * | 2017-06-21 | 2021-07-13 | Speed France Sas | Monofilament string for a racket and process for manufacturing such a monofilament string |
Families Citing this family (6)
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CN102924909B (en) * | 2012-11-13 | 2014-10-08 | 华东理工大学 | Tennis racket string made from nanometer particle/nylon composite material and prepartion method thereof |
JP6698317B2 (en) * | 2015-11-12 | 2020-05-27 | ヨネックス株式会社 | Racket string |
CN106349564A (en) * | 2016-08-30 | 2017-01-25 | 安徽翰文运动用品股份有限公司 | Badminton racket string and preparation method thereof |
WO2021009052A1 (en) | 2019-07-12 | 2021-01-21 | Speed France Sas | Monofilament string for a racket |
CN110846759A (en) * | 2019-11-08 | 2020-02-28 | 扬州克林体育用品有限公司 | String for racket |
CN110983782A (en) * | 2019-12-23 | 2020-04-10 | 扬州克林体育用品有限公司 | Coating for racket string and racket |
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- 2009-08-11 US US13/058,640 patent/US20110201462A1/en not_active Abandoned
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- 2009-08-11 WO PCT/FR2009/051580 patent/WO2010018343A1/en active Application Filing
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Cited By (1)
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US11058926B2 (en) * | 2017-06-21 | 2021-07-13 | Speed France Sas | Monofilament string for a racket and process for manufacturing such a monofilament string |
Also Published As
Publication number | Publication date |
---|---|
JP2011530359A (en) | 2011-12-22 |
CN102119048A (en) | 2011-07-06 |
FR2934958B1 (en) | 2012-11-09 |
WO2010018343A1 (en) | 2010-02-18 |
FR2934958A1 (en) | 2010-02-19 |
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