ES2334957A1 - Paddle racket having moveable ballast - Google Patents
Paddle racket having moveable ballast Download PDFInfo
- Publication number
- ES2334957A1 ES2334957A1 ES200703192A ES200703192A ES2334957A1 ES 2334957 A1 ES2334957 A1 ES 2334957A1 ES 200703192 A ES200703192 A ES 200703192A ES 200703192 A ES200703192 A ES 200703192A ES 2334957 A1 ES2334957 A1 ES 2334957A1
- Authority
- ES
- Spain
- Prior art keywords
- racket
- paddle
- guide tube
- paddle racket
- tube
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 10
- 238000003780 insertion Methods 0.000 claims abstract description 6
- 230000037431 insertion Effects 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003292 glue Substances 0.000 claims abstract description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 abstract description 10
- 239000004576 sand Substances 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 235000004936 Bromus mango Nutrition 0.000 description 1
- 240000007228 Mangifera indica Species 0.000 description 1
- 235000014826 Mangifera indica Nutrition 0.000 description 1
- 235000009184 Spondias indica Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
- A63B59/40—Rackets or the like with flat striking surfaces for hitting a ball in the air, e.g. for table tennis
- A63B59/48—Rackets or the like with flat striking surfaces for hitting a ball in the air, e.g. for table tennis with perforated surfaces
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
-
- A63B59/185—
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/08—Paddle tennis, padel tennis or platform tennis
-
- 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
- A63B60/02—Ballast means for adjusting the centre of mass
- A63B60/04—Movable ballast means
-
- 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
- A63B60/50—Details or accessories of golf clubs, bats, rackets or the like with through-holes
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Toys (AREA)
- Golf Clubs (AREA)
Abstract
Description
Raqueta de pádel con centro cambiante de gravedad.Paddle racket with changing center of gravity.
La presente invención se refiere a una raqueta de pádel con centro cambiante de gravedad.The present invention relates to a racket of paddle with changing center of gravity.
Una raqueta de pádel convencional normalmente tiene un armazón y un mango, que se conecta al armazón para que el usuario lo sujete. El armazón tiene una forma plana con dos superficies paralelas que sirven para golpear la bola.A conventional paddle racket normally It has a frame and a handle, which connects to the frame so that the user hold it. The frame has a flat shape with two parallel surfaces that serve to hit the ball.
La raqueta de pádel de la técnica anterior arriba mencionada generalmente presenta dos desventajas. La primera desventaja reside en que la masa del armazón está distribuida de manera uniforme o regular, de manera que la fuerza de reacción generada por el golpeo de la bola puede provocar que la raqueta de pádel tome una inclinación cuando la raqueta de pádel golpea la bola de manera excéntrica. En otras palabras, la raqueta de pádel de la técnica anterior tiene una estabilidad de golpeo de bola relativamente baja así como una baja habilidad de control de bola. La segunda desventaja es que el centro de gravedad y el momento de inercia de la raqueta de pádel de la técnica anterior se fijan durante la fabricación de la raqueta de pádel. En el caso de una raqueta de pádel que tiene un centro de gravedad relativamente lejano de la mano del usuario, el usuario puede golpear la bola de manera relativamente fuerte. Sin embargo, no puede facilitar un movimiento rápido debido al momento de inercia relativamente grande cuando la raqueta se gira, por ejemplo de un golpe de derecho a un revés. Por el contrario, la raqueta de pádel que tiene un centro de gravedad más cercano a la mano del usuario y que por lo tanto tiene un momento de inercia más pequeño, tiene un giro relativamente flexible. Sin embargo, no puede golpear la bola de manera fuerte. Debido a que la raqueta de pádel convencional no puede facilitar a la vez fuerza para un golpe de bola potente y buena flexibilidad, resulta deseable proporcionar una raqueta de pádel mejorada.The paddle racket of the prior art Above mentioned generally has two disadvantages. The first disadvantage is that the mass of the frame is distributed in uniform or regular manner, so that the reaction force generated by hitting the ball can cause the racket to paddle take a bow when the paddle racket hits the ball eccentrically. In other words, the paddle racket of the prior art has a ball hitting stability relatively low as well as a low ball control skill. The second disadvantage is that the center of gravity and the moment of inertia of the prior art paddle racket are fixed during the manufacture of the paddle racket. In the case of a paddle racket that has a relatively center of gravity far from the user's hand, the user can hit the ball of relatively strong way. However, it cannot facilitate a fast movement due to the relatively large moment of inertia when the racket is turned, for example from a right hit to a reverse. On the contrary, the paddle racket that has a center of gravity closest to the user's hand and therefore has a smaller moment of inertia, has a relatively twist flexible. However, you cannot hit the ball hard. Because the conventional paddle racket cannot facilitate at the same time strength for a powerful ball hit and good flexibility, it is desirable to provide an improved paddle racket.
La presente invención busca proporcionar una raqueta de pádel que tenga un centro cambiante de gravedad para aumentar la estabilidad en el golpeo de la bola así como la habilidad de control de bola.The present invention seeks to provide a paddle racket that has a changing center of gravity for increase the stability in hitting the ball as well as the ball control skill
La presente invención también busca proporcionar una raqueta de pádel que pueda facilitar una mejor potencia en el golpeo de la bola así como una buena flexibilidad.The present invention also seeks to provide a paddle racket that can facilitate better power in the hitting the ball as well as good flexibility.
De acuerdo con la invención, una raqueta de pádel comprende un armazón que tiene una forma plana con dos superficies paralelas para el golpeo de la bola; al menos un tubo guía fijado a la periferia del armazón; un objeto móvil o material que de forma móvil y libre se recibe en el tubo guía; y un mango conectado en un extremo al armazón.According to the invention, a racket of paddle comprises a frame that has a flat shape with two parallel surfaces for hitting the ball; at least one tube guide fixed to the periphery of the frame; a moving object or material which is received mobile and free in the guide tube; and a mango connected at one end to the frame.
El tubo guía puede tener una forma arqueada y puede estar localizado en un plano paralelo a las superficies de golpeo de bola.The guide tube may have an arcuate shape and may be located in a plane parallel to the surfaces of hitting ball
Se pueden proporcionar dos tubos guía, cada uno de ellos en lados opuestos del cabezal de la raqueta.Two guide tubes can be provided, each of them on opposite sides of the racket head.
El armazón puede estar provisto en la periferia del mismo de una parte conectora a la cual se fija un tubo guía.The frame may be provided on the periphery thereof of a connecting part to which a tube is fixed guide.
La parte conectora puede estar provista de una ranura en la cual se instala el tubo guía.The connecting part may be provided with a slot in which the guide tube is installed.
De manera alternativa, la parte conectora puede estar provista de dos huecos para la inserción de dos extremos del tubo guía y puede estar provista de al menos una protuberancia con un hueco directo a través del cual se inserta el tubo guía.Alternatively, the connecting part can be provided with two holes for the insertion of two ends of the guide tube and may be provided with at least one protuberance with a direct gap through which the guide tube is inserted.
El tubo guía puede ajustare a la periferia del armazón mediante pegamento.The guide tube can be adjusted to the periphery of the glue frame.
El objeto y/o material móvil puede estar formado por un líquido, sólidos o una mezcla de líquido y sólido.The object and / or moving material may be formed by a liquid, solids or a mixture of liquid and solid.
El líquido puede ser agua o mercurio y los sólidos pueden ser arena o un conjunto de bolas de acero.The liquid can be water or mercury and the solids can be sand or a set of steel balls.
El tubo guía puede ser transparente o translúcido.The guide tube can be transparent or translucent.
La presente invención se describirá a continuación con gran detalle, como modo de ejemplo, con referencia a los dibujos, en los cuales:The present invention will be described in continued in great detail, as an example, with reference to the drawings, in which:
La Fig. 1 es una vista en perspectiva de una primera realización preferente de la presente invención;Fig. 1 is a perspective view of a first preferred embodiment of the present invention;
La Fig. 2 es una vista en sección tomada a lo largo de la línea 2-2 de la Fig. 1, yFig. 2 is a sectional view taken at along line 2-2 of Fig. 1, and
La Fig. 3 es una vista en perspectiva de una segunda realización preferente de la presente invención.Fig. 3 is a perspective view of a second preferred embodiment of the present invention.
Una raqueta de pádel 10 con un centro cambiante de gravedad de acuerdo con una primera realización de la invención se muestra en las Figs. 1 y 2. Comprende un armazón 20 provisto de dos tubos guía 40 que contienen objetos y/o materiales móviles 50, y un mango 60.A paddle racket 10 with a changing center of gravity according to a first embodiment of the invention It is shown in Figs. 1 and 2. Includes a frame 20 provided with two guide tubes 40 containing moving objects and / or materials 50, and a handle 60.
El armazón 20 tiene una forma plana que tiene dos superficies paralelas que sirven para golpear la bola 22, una periferia 24 con dos partes conectoras al tubo guía 30 formadas respectivamente en dos lados laterales opuestos de la periferia 24. Las partes conectoras al tubo guía 30 comprenden, cada una de ellas, dos bloques extremos conectores 32, cada uno de los cuales tiene un hueco de inserción para el tubo 321. Dos protuberancias 34 están localizadas en la periferia entre los dos bloques conectores 32 y respectivamente cada una de ellas está provista de un hueco directo 341. De manera alternativa, se localizan tres orificios 36 entre los bloques conectores 32 y las protuberancias 34, y los huecos de inserción 321 y los huecos directos 341 se abren en estos orificios 36.The frame 20 has a flat shape that has two parallel surfaces that serve to hit the ball 22, one periphery 24 with two connecting parts to the guide tube 30 formed respectively on two opposite lateral sides of the periphery 24. The connecting parts to the guide tube 30 comprise, each of they, two end blocks connectors 32, each of which It has an insertion hole for tube 321. Two protrusions 34 they are located on the periphery between the two connector blocks 32 and respectively each of them is provided with a hole direct 341. Alternatively, three holes 36 are located between the connecting blocks 32 and the protuberances 34, and the insertion holes 321 and direct holes 341 open in these holes 36.
Cada tubo guía 40 se inserta a través de huecos directos 341 de las dos protuberancias 34 y los orificios 36. El tubo guía 40 tiene un primer extremo 42 y un segundo extremo 44, que de manera respectiva se insertan en los huecos de inserción 321 de los dos bloques conectores 32. La forma de los dos tubos guía 40 es arqueada, siguiendo la curvatura de la periferia del cabezal, y los dos tubos guía 40 están localizados en un plano imaginario 46 paralelo a las superficies de golpeo de la bola 22. Los tubos guía 40 son transparentes.Each guide tube 40 is inserted through holes Direct 341 of the two protrusions 34 and the holes 36. The guide tube 40 has a first end 42 and a second end 44, which are inserted respectively in the insertion holes 321 of the two connector blocks 32. The shape of the two guide tubes 40 it is arched, following the curvature of the periphery of the head, and the two guide tubes 40 are located in an imaginary plane 46 parallel to the hitting surfaces of the ball 22. The guide tubes 40 are transparent.
Los objetos y/o material móviles 50 están contenidos de manera móvil en los tubos guía 40. En esta realización, el objeto y/o material móvil 50 está formado por una mezcla de agua y un conjunto de bolas de acero. Sin embargo, el mercurio u otros líquidos adecuados pueden sustituirse por el agua, y las bolas de acero pueden sustituirse por arena u otros sólidos. De manera alternativa, los objetos y/o material móviles 50 pueden estar completamente formados tanto por líquidos como por sólidos.Mobile objects and / or material 50 are contained in mobile way in the guide tubes 40. In this embodiment, the object and / or mobile material 50 is formed by a Mix of water and a set of steel balls. However the mercury or other suitable liquids can be replaced by water, and the steel balls can be replaced by sand or other solids. Alternatively, mobile objects and / or material 50 may be completely formed by both liquids and solid.
El mango 60 tiene un extremo conectado al armazón 20.The handle 60 has one end connected to the frame 20.
En uso, cuando un usuario gira la raqueta de pádel 10 para golpear una bola, el objeto y/o material móvil 50 se moverá al segundo extremo 44 del respectivo tubo guía 40, alejándose del mango 60, mediante fuerza centrífuga, aumentando de este modo la masa de la parte delantera (es decir, la parte más lejana del mango 60) del armazón 20. Bajo esta circunstancia, a pesar de que la raqueta de pádel 10 puede golpear la bola de manera excéntrica, las dos superficies que golpean la bola 22 del armazón 20 aún tenderán a permanecer rectas, es decir, la raqueta de pádel no se inclinará fácilmente. Por lo tanto, la raqueta de pádel 10 tendrá una mejor estabilidad en el golpeo de bola y una mejor habilidad para el control de la bola.In use, when a user rotates the racket paddle 10 to hit a ball, the object and / or moving material 50 is will move to the second end 44 of the respective guide tube 40, moving away from the handle 60, by centrifugal force, increasing from this way the mass of the front part (i.e. the most part far from the handle 60) of the frame 20. Under this circumstance, a although the paddle racket 10 can hit the ball so eccentric, the two surfaces that hit the ball 22 of the frame 20 will still tend to remain straight, that is, the paddle racket It will not tip easily. Therefore, paddle racket 10 it will have better stability in ball hitting and better ability to control the ball.
Además, cuando los objetos y/o material móviles 50 mueven el segundo extremo 44 del respectivo tubo guía 40, el centro de gravedad de la raqueta de pádel 10 se alejará del mango 60 al mismo tiempo. De este modo, el momento de inercia de la raqueta de pádel 10 aumentará, de modo que el usuario puede golpear la bola de manera más potente. Así mismo, antes de golpear la bola, el usuario puede sujetar en vertical la raqueta de pádel 10 para provocar que los objetos y/o material móviles 50 se muevan al primer extremo 42 del respectivo tubo guía 40 por gravedad, de modo que el momento de inercia de la raqueta de pádel 10 inicialmente será menor en pequeños términos, aumentando de este modo la flexibilidad del giro inicial de la raqueta de pádel 10. Por consiguiente, la raqueta de pádel 10 puede girarse rápidamente a una posición predeterminada. Debido a que la raqueta de pádel 10 cambia su momento de inercia moviendo los objetos y/o material móviles 50 para golpear la bola y girar la raqueta de pádel 10, la raqueta de pádel 10 puede proporcionar un mejor y más potente golpeo de bola así como una mayor flexibilidad de giro.In addition, when moving objects and / or material 50 move the second end 44 of the respective guide tube 40, the center of gravity of the paddle racket 10 will move away from the handle 60 at the same time. Thus, the moment of inertia of the paddle racket 10 will increase, so that the user can hit the ball in a more powerful way. Likewise, before hitting the ball, the user can hold the paddle racket 10 vertically to cause moving objects and / or material 50 to move to first end 42 of the respective guide tube 40 by gravity, so that the moment of inertia of the paddle racket 10 initially it will be smaller in small terms, thus increasing the flexibility of the initial rotation of the paddle racket 10. By consequently, the paddle racket 10 can be quickly turned to a default position Because the paddle racket 10 changes its moment of inertia moving moving objects and / or material 50 to hit the ball and spin the paddle racket 10, the racket paddle 10 can provide a better and more powerful ball hit as well as greater flexibility of rotation.
Además, debido a que los tubos guía 40 son transparentes, los objetos y/o material móviles 50 puede producir un efecto visual especial cuando los objetos y/o material móviles se mueven en los tubos guía 40.In addition, because the guide tubes 40 are transparent, moving objects and / or material 50 can produce a special visual effect when moving objects and / or material they move in the guide tubes 40.
Debe entenderse que el modo en el cual los tubos guía se ajustan al armazón no se limita a la realización anteriormente mencionada. Tal y como se muestra en la Fig. 3, una raqueta de pádel, de acuerdo con una segunda realización de la presente invención, consta de dos tubos guía 82, dos objetos móviles 83 y un mango 84, que son los mismos o muy similares a los de la primera realización. En la realización de la Fig. 3, los tubos guía 82 están localizados en los orificios 85 y están ajustados al armazón 86 de la raqueta de pádel 80 por medio de pegamento u otro adhesivo adecuado.It should be understood that the way in which the tubes guide fit the frame is not limited to the realization previously mentioned. As shown in Fig. 3, a paddle racket, according to a second embodiment of the present invention, consists of two guide tubes 82, two objects phones 83 and a handle 84, which are the same or very similar to of the first embodiment. In the embodiment of Fig. 3, the guide tubes 82 are located in holes 85 and are fitted to the frame 86 of the paddle racket 80 by means of glue or other suitable adhesive.
La raqueta de pádel puede estar hecha con varios diseños diferentes dentro del alcance de la invención. Por ejemplo, las partes conectoras 30 puede estar provistas de uno, dos o más de tres orificios 36 entre los bloques conectores 32 y las protuberancias 34 para la instalación adecuada de los tubos guía 40. Además, el número y posición de los tubos guía 40, las protuberancias 34 o los orificios 36 también pueden variar. Los tubos guía 40 puede ser transparentes o translúcidos.The paddle racket can be made with several different designs within the scope of the invention. For example, the connecting parts 30 may be provided with one, two or more of three holes 36 between the connector blocks 32 and the protrusions 34 for proper installation of guide tubes 40. In addition, the number and position of the guide tubes 40, the bumps 34 or holes 36 may also vary. The guide tubes 40 may be transparent or translucent.
Claims (17)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0700197.7 | 2007-01-05 | ||
| GB0700197A GB2445352A (en) | 2007-01-05 | 2007-01-05 | Paddle racket having moveable ballast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2334957A1 true ES2334957A1 (en) | 2010-03-17 |
| ES2334957B1 ES2334957B1 (en) | 2011-04-28 |
Family
ID=37801781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES200703192A Withdrawn - After Issue ES2334957B1 (en) | 2007-01-05 | 2007-11-30 | "PADDLE RACKET WITH CHANGING CENTER OF GRAVITY". |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN101214419A (en) |
| AR (1) | AR064083A1 (en) |
| ES (1) | ES2334957B1 (en) |
| GB (1) | GB2445352A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2400286R1 (en) * | 2010-12-28 | 2013-06-25 | Decathlon Sa | Ball game device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3004657A1 (en) * | 2013-04-18 | 2014-10-24 | Ramzi Hani Maher Georges | HALF TENNIS RAQUETTE PARTIALLY FILLED WITH LIQUID TO ENHANCE THE MOVEMENT EFFICIENCY. |
| CN105013155A (en) * | 2014-04-26 | 2015-11-04 | 上海体育学院 | Tennis racket capable of changing mass distribution by filling mercury into head framework pipeline |
| USD1016196S1 (en) | 2021-12-16 | 2024-02-27 | Selkirk Sport, LLC | Sports equipment |
| WO2023114486A1 (en) * | 2021-12-16 | 2023-06-22 | Selkirk Sport, LLC | Open throat paddle |
| SE546079C2 (en) * | 2021-12-29 | 2024-05-14 | Evosport Ab | Padel racket with curved ribs in the frame, a mould for producing said padel racket and a method for producing said padel racket |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3907292A (en) * | 1972-02-05 | 1975-09-23 | James P Moreland | Dynamically variable tennis racket |
| US4330125A (en) * | 1980-08-22 | 1982-05-18 | Sassler Marvin L | Apparatus for reducing torque and vibration in racquets |
| WO1988001890A1 (en) * | 1986-09-11 | 1988-03-24 | Silvera Richard S | Sports racket swing trainer |
| US4984792A (en) * | 1987-06-11 | 1991-01-15 | Jan Pacanski | Weighted tennis/racquetball racket |
| AR246685A1 (en) * | 1992-10-26 | 1994-09-30 | Guillermo Hector Paratore Y Ju | Modfied balancing device for a paddle blade. |
| US6575854B1 (en) * | 2001-12-07 | 2003-06-10 | Jian Kuo Yang | Automatic adjusting device for adjusting the position of the center of gravity of an object |
| ES1055113U (en) * | 2003-06-20 | 2003-10-16 | Eurorackets S L | Pala for ball games. (Machine-translation by Google Translate, not legally binding) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4262903A (en) * | 1979-05-18 | 1981-04-21 | Joseph Naret | Paddle racquet |
| US4411427A (en) * | 1980-06-23 | 1983-10-25 | Alfred Baumgartner | Bat for playing games |
-
2007
- 2007-01-05 GB GB0700197A patent/GB2445352A/en not_active Withdrawn
- 2007-11-30 ES ES200703192A patent/ES2334957B1/en not_active Withdrawn - After Issue
- 2007-11-30 AR ARP070105363A patent/AR064083A1/en unknown
- 2007-12-05 CN CNA2007103061524A patent/CN101214419A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3907292A (en) * | 1972-02-05 | 1975-09-23 | James P Moreland | Dynamically variable tennis racket |
| US4330125A (en) * | 1980-08-22 | 1982-05-18 | Sassler Marvin L | Apparatus for reducing torque and vibration in racquets |
| WO1988001890A1 (en) * | 1986-09-11 | 1988-03-24 | Silvera Richard S | Sports racket swing trainer |
| US4984792A (en) * | 1987-06-11 | 1991-01-15 | Jan Pacanski | Weighted tennis/racquetball racket |
| AR246685A1 (en) * | 1992-10-26 | 1994-09-30 | Guillermo Hector Paratore Y Ju | Modfied balancing device for a paddle blade. |
| US6575854B1 (en) * | 2001-12-07 | 2003-06-10 | Jian Kuo Yang | Automatic adjusting device for adjusting the position of the center of gravity of an object |
| ES1055113U (en) * | 2003-06-20 | 2003-10-16 | Eurorackets S L | Pala for ball games. (Machine-translation by Google Translate, not legally binding) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2400286R1 (en) * | 2010-12-28 | 2013-06-25 | Decathlon Sa | Ball game device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2445352A (en) | 2008-07-09 |
| CN101214419A (en) | 2008-07-09 |
| ES2334957B1 (en) | 2011-04-28 |
| AR064083A1 (en) | 2009-03-11 |
| GB0700197D0 (en) | 2007-02-14 |
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