EP1882499A1 - Sports ball comprising automatic means of inflation and method of managing the internal pressure of such a ball - Google Patents

Sports ball comprising automatic means of inflation and method of managing the internal pressure of such a ball Download PDF

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Publication number
EP1882499A1
EP1882499A1 EP07112910A EP07112910A EP1882499A1 EP 1882499 A1 EP1882499 A1 EP 1882499A1 EP 07112910 A EP07112910 A EP 07112910A EP 07112910 A EP07112910 A EP 07112910A EP 1882499 A1 EP1882499 A1 EP 1882499A1
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EP
European Patent Office
Prior art keywords
micro
balloon
internal pressure
pressure
sports
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Granted
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EP07112910A
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German (de)
French (fr)
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EP1882499B1 (en
Inventor
Andréa Vassilev
Roland Blanpain
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique CEA
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B41/00—Hollow inflatable balls
    • A63B41/12—Tools or devices for blowing up or closing balls

Definitions

  • the present invention relates to a sports ball and more generally to a pneumatic object intended to be used in an inflated state, for example, comprising automatic inflation means and to a method for managing the internal pressure of such a balloon .
  • the pressure of the footballs must be maintained at a given level, or at least within a given pressure range, so that the balloon retains all its static characteristics, such as hardness and dynamic characteristics, including the height and speed of the ball. rebound, so that the quality of the game during a game of game does not deteriorate.
  • Inflation requires at all times a means of inflation, such as manual pump or pneumatic compressor.
  • a means of inflation such as manual pump or pneumatic compressor.
  • the inflation is long, may be non-reproducible and can become painful.
  • a pneumatic compressor it is bulky and is not available on the playing field.
  • the inflation requires the establishment of a needle in a non-return valve, the risk of loss of the needle is not negligible.
  • a sports ball and more generally a pneumatic object, comprising micro-gas generators activated to compensate for a decrease in the internal pressure of the object.
  • the pneumatic object is equipped with a system for ensuring a constant pressure inside the latter, automatically and autonomously.
  • a sensor is associated with the internal pressure of the object, a pressure generator, for example a gas generator, actuated as a function of the measured pressure and a predetermined pressure value.
  • a pressure generator for example a gas generator
  • the subject of the present invention is therefore mainly a sports balloon comprising at least one sensor for measuring an internal pressure of said object, automatic inflation means capable of compensating for a decrease in the internal pressure, comprising at least one micro-gas generator, said at least one micro-generator being adapted to be actuated when the pressure measuring sensor measures an internal pressure lower than a predetermined threshold.
  • Said micro-generator may comprise, for example a pyrotechnic composition capable of igniting by joule effect and an electric actuator capable of causing the ignition of said composition.
  • the pyrotechnic composition may be solid propellant.
  • the electric actuator comprises a capacitive circuit powered by a micro-battery.
  • the electric actuator comprises a capacitive circuit powered by a device for converting a deformation energy of the object into electrical energy, of the piezoelectric device type.
  • the object according to the invention may also include a sensor of an internal temperature of the object.
  • the sports ball advantageously comprises several micro-gas generators regularly distributed so as to limit the unbalance effect.
  • the activation of the micro-generators is done in a pre-established order to avoid an unbalance effect.
  • a sports balloon comprising a flexible outer casing 2 intended to come into contact with the external environment, such as the ground and the feet, in the case of a football .
  • the balloon also comprises an air chamber 4 intended to be inflated under pressure and ensuring its hardness to the envelope 2.
  • a balloon having a single envelope also forming an air chamber is not outside the scope of the present invention.
  • the balloon may advantageously comprise a valve 8 to allow a first inflation.
  • the balloon also comprises automatic inflating means 6 of the balloon disposed in the air chamber, in particular fixed on an inner surface of the air chamber 4.
  • These automatic inflation means 6 comprise, particularly advantageously, at least one gas generator implanted on the inner wall of the air chamber 4 of the balloon.
  • the gas generator is of the type used in motor vehicle airbags, also known as Airbags ® or seatbelt pre-tensioners, intended for the protection of occupants in the event of an impact.
  • the gas generator is not shown in detail.
  • the propellants used can be of several types. These are generally in solid form, for example in the form of compacted powder, for example NaN3-based compound.
  • LTPN Liters at Normal Temperature and Pressure
  • Tetrazol has the advantage of having a lower combustion temperature of about 700 ° C instead of 900 ° C, and of generating nontoxic reaction products.
  • the automatic inflation means 6 also comprise at least one pressure sensor 10 for measuring the pressure in the air chamber, in order to allow a comparison of the actual value of the pressure and a set value, and to act if necessary. to adapt the actual value to the setpoint.
  • the gas generator is actuated according to the difference between the actual pressure in the tank and the predetermined setpoint, according to a logic defined elsewhere.
  • the pressure sensor is for example integrated in the valve of the balloon.
  • a sensor (not shown) of the internal temperature of the balloon is also provided, making it possible to make a correction of the measurement of the pressure in order to have a measurement as accurate as possible of the quantity of air in the sports ball.
  • the amounts of gas used are very small, so their very high temperature does not pose a problem for the sports ball.
  • the valve 8 makes it possible to perform at least the first inflation of the balloon.
  • the actuator 9 comprises, for example a capacitive circuit, which can be powered either by the energy stored on a support integrated with the inflation means 6, such as a micro-battery, or be provided by a micro-converting system. the energy of deformation of the balloon by piezoelectric means.
  • capacitive circuit offers the advantage of delivering a relatively high power of a few Watts in a very short time with a low energy, for example less than 0.1 mA.h for a dozen initiations.
  • the capacitive circuit advantageously has a capacitance of great value, in order to provide the necessary power, this capacitance being able to be unique and serve all the reactions. It is also possible to provide a capacitive circuit for each of the gas generators.
  • the inflation means 6 provide a determined volume of gas, and thus ensures an inflation of the balloon at a given pressure for a certain time depending on the porosity of the balloon and its solicitation.
  • the volume of gas generated by an automobile airbag ranges from 40 to 140 LTPN according to its function.
  • the volume of a balloon, inflated between 0.6 6 and 1.1 bar relative (ie 1.6 to 2.1 bar absolute) is 4.3 L, which corresponds to 7 to 9 LTPN.
  • a gas generator is activated as soon as the pressure drops by 5%, which corresponds to approximately 0.4 LTPN, that is to the combustion of approximately 1 g of pyrotechnic composition or 0.25 g of what remains a very small amount.
  • the inflation means 6 make it possible to guarantee inflation at the set pressure for at least six games or practices.
  • the inflation means 6 preferably comprise several gas micro-generators that can be used separately, each consuming a small mass of chemical compound.
  • the micro-gas generators are evenly distributed over the inner envelope of the balloon in order to balance the balloon.
  • the static and dynamic balancing of the balloon could be affected if the micro-generators are not positioned and / or used in a concerted manner.
  • the present invention applies in particular to sports balls, for example footballs, basketball, handball, rugby.
  • the present invention also applies to all pneumatic objects whose pressure is to be maintained, for example in inflatable channels, inflatable buoys or even inflatable rescue vests for which the maintenance of a certain level of inflatable is very important. .

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Air Bags (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • External Artificial Organs (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Closures For Containers (AREA)
  • Pens And Brushes (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The ball has an internal pressure transducer (10) for measuring the internal pressure of the ball. A gas micro generator (6) compensates the decreases in the internal pressure of the ball measured by the transducer. The gas micro generator is activated, when the internal pressure measured by the transducer is lower than a predetermined threshold. The micro generator has a pyrotechnic composition (7) such as solid propellant, which is ignited by Joule effect, and an electric actuator (9) with a capacitive circuit that causes the inflammation of the composition. An independent claim is also included for a method for controlling the internal pressure of a sports ball.

Description

DOMAINE TECHNIQUE ET ART ANTÉRIEURTECHNICAL FIELD AND PRIOR ART

La présente invention se rapporte à un ballon de sport et plus généralement à un objet pneumatique destiné à être utilisé dans un état gonflé, par exemple, comportant des moyens automatiques de gonflage et à un procédé de gestion de la pression interne d'un tel ballon.The present invention relates to a sports ball and more generally to a pneumatic object intended to be used in an inflated state, for example, comprising automatic inflation means and to a method for managing the internal pressure of such a balloon .

La pression des ballons de football doit être maintenue à un niveau donné, ou pour le moins dans une gamme de pression donnée, afin que le ballon conserve toutes ses caractéristiques statiques, comme la dureté et ses caractéristiques dynamiques, notamment la hauteur et la vitesse de rebond, afin que la qualité du jeu pendant une partie de jeu ne se dégrade pas.The pressure of the footballs must be maintained at a given level, or at least within a given pressure range, so that the balloon retains all its static characteristics, such as hardness and dynamic characteristics, including the height and speed of the ball. rebound, so that the quality of the game during a game of game does not deteriorate.

Or, du fait de la porosité naturelle de l'enveloppe du ballon, ce dernier a tendance à se dégonfler. Ainsi, afin de conserver une pression acceptable, les entraîneurs des équipes sont contraints d'effectuer de fastidieux regonflages des ballons lors des séances d'entraînement. Les arbitres des matchs, quant à eux, vérifient fréquemment et manuellement la pression des ballons et les remplacent lorsque la pression leur semble trop faible.However, because of the natural porosity of the envelope of the balloon, the latter tends to deflate. Thus, in order to maintain an acceptable pressure, the coaches of the teams are forced to perform tedious inflations of the balloons during training sessions. Match referees, on the other hand, frequently and manually check the pressure of balloons and replace them when the pressure seems too low.

Le gonflage nécessite de disposer à tout moment d'un moyen de gonflage, type pompe manuelle ou compresseur pneumatique. Dans le cas d'une pompe à main, le gonflage est long, peut être non reproductible et peut devenir pénible. Dans le cas d'un compresseur pneumatique, celui-ci est encombrant et n'est pas disponible sur le terrain même de jeu.Inflation requires at all times a means of inflation, such as manual pump or pneumatic compressor. In the case of a hand pump, the inflation is long, may be non-reproducible and can become painful. In the case of a pneumatic compressor, it is bulky and is not available on the playing field.

De plus, le gonflage nécessite la mise en place d'une aiguille dans une valve anti-retour, le risque de perte de l'aiguille est non négligeable.In addition, the inflation requires the establishment of a needle in a non-return valve, the risk of loss of the needle is not negligible.

Il est connu des documents WO 01/95982 et WO 2004/067098 A2 , des ballons comportant des pompes intégrées à actionnement manuel. Ainsi, le moyen de gonflage est toujours à disposition. Ainsi, lorsque l'utilisateur considère que la pression du ballon n'est pas suffisante, il actionne la pompe contenue dans le ballon.Documents are known WO 01/95982 and WO 2004/067098 A2 , balloons with integrated pumps manually operated. Thus, the inflation means is always available. Thus, when the user considers that the pressure of the balloon is not sufficient, it actuates the pump contained in the balloon.

Or ces systèmes intégrés restent à actionnement manuel, par conséquent il existe toujours une perte de temps du fait du gonflage et il en résulte toujours une fatigue. Par ailleurs, l'appréciation du niveau de pression reste subjective et requiert une surveillance périodique.However, these integrated systems remain manually operated, therefore there is always a loss of time due to inflation and it always results in fatigue. In addition, the assessment of the level of pressure remains subjective and requires periodic monitoring.

C'est par conséquent un but de la présente invention d'offrir un ballon de sport, et plus généralement un objet pneumatique destiné à être utilisé sous des conditions de pression données, permettant de libérer l'utilisateur de la surveillance et du maintien de la pression interne.It is therefore an object of the present invention to provide a sports ball, and more generally a pneumatic object for use under given pressure conditions, to release the user from the monitoring and maintenance of the internal pressure.

EXPOSÉ DE L'INVENTIONSTATEMENT OF THE INVENTION

Le but précédemment énoncé est atteint par un ballon de sport et plus généralement un objet pneumatique, comportant des micro-générateurs de gaz activés pour compenser une diminution de la pression interne de l'objet.The previously stated goal is achieved by a sports ball and more generally a pneumatic object, comprising micro-gas generators activated to compensate for a decrease in the internal pressure of the object.

En d'autres termes, l'objet pneumatique est équipé d'un système permettant d'assurer une pression constante à l'intérieur de celui-ci, de façon automatique et autonome.In other words, the pneumatic object is equipped with a system for ensuring a constant pressure inside the latter, automatically and autonomously.

Selon l'invention, on associe à un capteur de la pression interne de l'objet, un générateur de pression, par exemple un générateur de gaz, actionné en fonction de la pression mesurée et d'une valeur de pression prédéterminée.According to the invention, a sensor is associated with the internal pressure of the object, a pressure generator, for example a gas generator, actuated as a function of the measured pressure and a predetermined pressure value.

La présente invention a, par conséquent, principalement pour objet un ballon de sport comportant au moins un capteur de mesure d'une pression interne dudit objet, de moyens automatiques de gonflage, aptes à compenser une diminution de la pression interne, comprenant au moins un micro-générateur de gaz, ledit au moins un micro-générateur étant apte à être actionné lorsque le capteur de mesure de pression mesure une pression interne inférieure à un seuil prédéterminé.The subject of the present invention is therefore mainly a sports balloon comprising at least one sensor for measuring an internal pressure of said object, automatic inflation means capable of compensating for a decrease in the internal pressure, comprising at least one micro-gas generator, said at least one micro-generator being adapted to be actuated when the pressure measuring sensor measures an internal pressure lower than a predetermined threshold.

Ledit micro-générateur peut comporter, par exemple une composition pyrotechnique apte à s'enflammer par effet joule et un actionneur électrique apte à provoquer l'inflammation de ladite composition.Said micro-generator may comprise, for example a pyrotechnic composition capable of igniting by joule effect and an electric actuator capable of causing the ignition of said composition.

La composition pyrotechnique peut être du propergol solide.The pyrotechnic composition may be solid propellant.

Dans un exemple de réalisation, l'actionneur électrique comporte un circuit capacitif alimenté par une micro-pile.In an exemplary embodiment, the electric actuator comprises a capacitive circuit powered by a micro-battery.

Dans un autre exemple de réalisation, l'actionneur électrique comporte un circuit capacitif alimenté par un dispositif convertisseur d'une énergie de déformation de l'objet en une énergie électrique, du type dispositif piézoélectrique.In another embodiment, the electric actuator comprises a capacitive circuit powered by a device for converting a deformation energy of the object into electrical energy, of the piezoelectric device type.

L'objet selon l'invention peut également comporter un capteur d'une température interne de l'objet.The object according to the invention may also include a sensor of an internal temperature of the object.

Le ballon de sport comporte avantageusement plusieurs micro-générateurs de gaz répartis régulièrement de manière à limiter l'effet de balourd.The sports ball advantageously comprises several micro-gas generators regularly distributed so as to limit the unbalance effect.

La présente invention a également pour objet un procédé de gestion de la pression interne d'un ballon de sport comportant plusieurs micro-générateurs de gaz, un capteur de pression comportant les étapes :

  • mesure de la pression interne du ballon de sport par le capteur de pression,
  • comparaison de la valeur de la pression avec une valeur seuil,
  • activation d'au moins un micro-générateur de gaz si la valeur de la pression mesurée est inférieure au seuil.
The present invention also relates to a method for managing the internal pressure of a sports ball comprising several micro-gas generators, a pressure sensor comprising the steps of:
  • measuring the internal pressure of the sports balloon by the pressure sensor,
  • comparing the value of the pressure with a threshold value,
  • activation of at least one micro-gas generator if the value of the measured pressure is below the threshold.

De manière particulièrement avantageuse, l'activation des micro-générateurs s'effectue selon un ordre préétabli pour éviter un effet de balourd.In a particularly advantageous manner, the activation of the micro-generators is done in a pre-established order to avoid an unbalance effect.

BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

La présente invention sera mieux comprise à l'aide de la description qui va suivre et de la figure unique annexée représentant une vue en coupe schématique d'un ballon de sport selon la présente invention.The present invention will be better understood with the aid of the description which follows and the single appended figure showing a schematic sectional view of a sports balloon according to the present invention.

EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERSDETAILED PRESENTATION OF PARTICULAR EMBODIMENTS

Sur la figure unique, on peut voir un ballon de sport selon la présente invention, comportant une enveloppe extérieure 2 souple destinée à venir en contact avec l'environnement extérieur, comme le sol et les pieds, dans le cas d'un ballon de football.In the single figure, we can see a sports balloon according to the present invention, comprising a flexible outer casing 2 intended to come into contact with the external environment, such as the ground and the feet, in the case of a football .

Le ballon comporte également une chambre à air 4 destinée à être gonflée sous pression et assurant sa dureté à l'enveloppe 2.The balloon also comprises an air chamber 4 intended to be inflated under pressure and ensuring its hardness to the envelope 2.

Un ballon comportant une seule enveloppe formant également chambre à air ne sort pas du cadre de la présente invention.A balloon having a single envelope also forming an air chamber is not outside the scope of the present invention.

Le ballon peut comporter avantageusement une valve 8 pour permettre un premier gonflage.The balloon may advantageously comprise a valve 8 to allow a first inflation.

Selon la présente invention, le ballon comporte également des moyens automatiques de gonflage 6 du ballon disposés dans la chambre à air, en particulier fixés sur une surface intérieure de la chambre à air 4.According to the present invention, the balloon also comprises automatic inflating means 6 of the balloon disposed in the air chamber, in particular fixed on an inner surface of the air chamber 4.

Ces moyens automatiques de gonflage 6 comportent, de manière particulièrement avantageuse, au moins un générateur de gaz implanté sur la paroi intérieure de la chambre à air 4 du ballon.These automatic inflation means 6 comprise, particularly advantageously, at least one gas generator implanted on the inner wall of the air chamber 4 of the balloon.

Le générateur de gaz est du type de ceux utilisés dans les coussins gonflables de sécurité pour les véhicules automobiles, dits également Airbags ® ou pour les pré-tensionneurs de ceinture de sécurité, destinés à la protection des occupants en cas de choc.The gas generator is of the type used in motor vehicle airbags, also known as Airbags ® or seatbelt pre-tensioners, intended for the protection of occupants in the event of an impact.

Le générateur de gaz n'est pas représenté de manière détaillée.The gas generator is not shown in detail.

Le générateur de gaz 6 comporte notamment :

  • une composition pyrotechnique 7, par exemple de type propergol qui, lorsqu'elle est enflammée par un initiateur, va générer un grand volume de gaz, en général de l'azote,
  • un initiateur ou actionneur électrique 9 qui est destiné à amorcer la réaction par effet joule au moyen d'un courant électrique.
The gas generator 6 comprises in particular:
  • a pyrotechnic composition 7, for example of the propellant type which, when ignited by an initiator, will generate a large volume of gas, in general nitrogen,
  • an initiator or electric actuator 9 which is intended to initiate the reaction by joule effect by means of an electric current.

Les propergols utilisés peuvent être de plusieurs types. Ceux-ci sont généralement sous forme solide, par exemple sous forme de poudre compactée, par exemple composée à base NaN3.The propellants used can be of several types. These are generally in solid form, for example in the form of compacted powder, for example NaN3-based compound.

On peut citer, à titre d'exemple, les performances de 10 g d'une composition à base de NaN3, ceux-ci sont capables de générer 4,5 LTPN d'azote (LTPN : Litres à Température et Pression Normales).By way of example, mention may be made of the performance of 10 g of a composition based on NaN 3, which are capable of generating 4.5 LTPN of nitrogen (LTPN: Liters at Normal Temperature and Pressure).

Il existe également des compositions azotées pouvant avoir des rendements jusqu'à 4 fois supérieurs, comme par exemple le tetrazol dont 10 g génèrent 20 LTPN.There are also nitrogen compositions that can have yields up to 4 times higher, such as tetrazol, of which 10 g generate 20 LTPN.

Le tetrazol présente l'avantage d'avoir une température de combustion plus basse de 700°C environ au lieu de 900°C, et de générer des produits de réaction non toxiques.Tetrazol has the advantage of having a lower combustion temperature of about 700 ° C instead of 900 ° C, and of generating nontoxic reaction products.

Les moyens automatiques de gonflage 6 comportent également au moins un capteur de pression 10 pour mesurer la pression dans la chambre à air, afin de permettre une comparaison de la valeur réelle de la pression et une valeur de consigne, et d'agir le cas échéant pour adapter la valeur réelle à la valeur de consigne.The automatic inflation means 6 also comprise at least one pressure sensor 10 for measuring the pressure in the air chamber, in order to allow a comparison of the actual value of the pressure and a set value, and to act if necessary. to adapt the actual value to the setpoint.

Ainsi, le générateur de gaz est actionné en fonction de la différence qui existe entre la pression réelle dans le ballon et la valeur de consigne prédéterminée, suivant une logique définie par ailleurs.Thus, the gas generator is actuated according to the difference between the actual pressure in the tank and the predetermined setpoint, according to a logic defined elsewhere.

Le capteur de pression est par exemple intégré dans la valve du ballon.The pressure sensor is for example integrated in the valve of the balloon.

Un capteur (non représenté) de la température interne du ballon est également prévu, permettant de faire une correction de la mesure de la pression afin d'avoir une mesure la plus exacte possible de la quantité d'air dans le ballon de sport.A sensor (not shown) of the internal temperature of the balloon is also provided, making it possible to make a correction of the measurement of the pressure in order to have a measurement as accurate as possible of the quantity of air in the sports ball.

Les quantités de gaz mises en oeuvre sont très petites, ainsi leur température très élevée ne pose pas de problème pour le ballon de sport.The amounts of gas used are very small, so their very high temperature does not pose a problem for the sports ball.

La valve 8 permet d'effectuer au moins le premier gonflage du ballon.The valve 8 makes it possible to perform at least the first inflation of the balloon.

L'actionneur 9 comporte, par exemple un circuit capacitif, qui peut être alimenté soit par de l'énergie stockée sur un support intégré aux moyens 6 de gonflage, telle qu'une micro-pile, ou être fournie par un micro-système convertissant l'énergie de déformation du ballon par des moyens piézo-électriques.The actuator 9 comprises, for example a capacitive circuit, which can be powered either by the energy stored on a support integrated with the inflation means 6, such as a micro-battery, or be provided by a micro-converting system. the energy of deformation of the balloon by piezoelectric means.

L'utilisation d'un circuit capacitif offre l'avantage de délivrer une puissance relativement élevée de quelques Watts en un temps très court avec une faible énergie, par exemple inférieure à 0.1 mA.h pour une dizaine d'initiations.The use of a capacitive circuit offers the advantage of delivering a relatively high power of a few Watts in a very short time with a low energy, for example less than 0.1 mA.h for a dozen initiations.

Le circuit capacitif a avantageusement une capacitance de grande valeur, afin de fournir la puissance nécessaire, cette capacitance pouvant être unique et servir à toutes les réactions. On peut également prévoir un circuit capacitif pour chacun des générateurs de gaz.The capacitive circuit advantageously has a capacitance of great value, in order to provide the necessary power, this capacitance being able to be unique and serve all the reactions. It is also possible to provide a capacitive circuit for each of the gas generators.

Les moyens 6 de gonflage fournissent un volume de gaz déterminé, et assure ainsi un gonflage du ballon à une pression donnée pendant un certain temps dépendant de la porosité du ballon et de sa sollicitation.The inflation means 6 provide a determined volume of gas, and thus ensures an inflation of the balloon at a given pressure for a certain time depending on the porosity of the balloon and its solicitation.

Nous allons maintenant donner un exemple de performance pour un ballon selon, la présente invention.We will now give an example of performance for a balloon according to the present invention.

Le volume de gaz généré par un airbag automobile va de 40 à 140 LTPN suivant sa fonction.The volume of gas generated by an automobile airbag ranges from 40 to 140 LTPN according to its function.

Par exemple, le volume d'un ballon, gonflé entre 0.6 6 et 1.1 bar relatif (soit 1.6 à 2.1 bars absolu) est de 4.3 L, ce qui correspond à 7 à 9 LTPN.For example, the volume of a balloon, inflated between 0.6 6 and 1.1 bar relative (ie 1.6 to 2.1 bar absolute) is 4.3 L, which corresponds to 7 to 9 LTPN.

En supposant qu'au cours d'un match ou d'un entraînement, un ballon perd, du fait de la porosité naturelle de l'enveloppe et/ou de la mauvaise étanchéité de la valve, 20 % au maximum de sa quantité d'air initiale. Le ballon perd alors 1.4 à 1.8 LTPN.Assuming that during a match or training, a balloon loses, due to the natural porosity of the envelope and / or the poor sealing of the valve, 20% maximum of its quantity of initial air. The ball then loses 1.4 to 1.8 LTPN.

Pour que la pression du ballon reste constante, un générateur de gaz est activé dès que la pression chute de 5 %, ce qui correspond environ à 0.4 LTPN, soit à la combustion d'environ 1 g de composition pyrotechnique ou 0,25 g de bétrazol ce qui reste une quantité très faible.In order for the pressure of the balloon to remain constant, a gas generator is activated as soon as the pressure drops by 5%, which corresponds to approximately 0.4 LTPN, that is to the combustion of approximately 1 g of pyrotechnic composition or 0.25 g of what remains a very small amount.

Ainsi, en considérant un dispositif comportant 24 micro-générateurs, aptes à générer chacun 0.4 LTPN, les moyens 6 de gonflage permettent de garantir un gonflage à la pression de consigne pendant au minimum six matchs ou entraînements.Thus, considering a device comprising 24 micro-generators, each capable of generating 0.4 LTPN, the inflation means 6 make it possible to guarantee inflation at the set pressure for at least six games or practices.

Les moyens 6 de gonflage comportent de préférence plusieurs micro-générateurs de gaz pouvant être utilisés séparément, chacun consommant une petite masse de composé chimique.The inflation means 6 preferably comprise several gas micro-generators that can be used separately, each consuming a small mass of chemical compound.

De manière avantageuse, les micro-générateurs de gaz sont répartis uniformément sur l'enveloppe interne du ballon afin d'équilibrer le ballon. En outre, on pourra prévoir de gérer leur ordre d'activation de manière à ne pas générer de balourd excessif, en prévoyant un ordre d'activation. En effet, l'équilibrage statique et dynamique du ballon pourrait être affecté si les micro-générateurs ne sont pas positionnés et/ou utilisés de manière concertée.Advantageously, the micro-gas generators are evenly distributed over the inner envelope of the balloon in order to balance the balloon. In addition, it will be possible to manage their activation order so as not to generate excessive unbalance, by providing an activation order. Indeed, the static and dynamic balancing of the balloon could be affected if the micro-generators are not positioned and / or used in a concerted manner.

La présente invention s'applique notamment aux ballons de sport, par exemple aux ballons de football, de basket-ball, de hand-ball, de rugby.The present invention applies in particular to sports balls, for example footballs, basketball, handball, rugby.

La présente invention s'applique également à tous les objets pneumatiques dont on souhaite maintenir la pression, par exemple dans les canaux gonflables, les bouées gonflables ou même les gilets de sauvetages gonflables pour lesquels le maintien d'un certain niveau de gonflable est très important.The present invention also applies to all pneumatic objects whose pressure is to be maintained, for example in inflatable channels, inflatable buoys or even inflatable rescue vests for which the maintenance of a certain level of inflatable is very important. .

Claims (9)

Ballon de sport comportant au moins un capteur d'une pression interne (10) dudit ballon, des moyens automatiques de gonflage (6), aptes à compenser une diminution de la pression interne, comprenant au moins un micro-générateur de gaz, ledit au moins un micro-générateur étant apte à être actionné lorsque le capteur de pression (10) mesure une pression interne inférieure à un seuil prédéterminé.Sports ball comprising at least one sensor of an internal pressure (10) of said balloon, automatic inflation means (6), able to compensate for a decrease in the internal pressure, comprising at least one micro-gas generator, said at least one at least one micro-generator being able to be actuated when the pressure sensor (10) measures an internal pressure lower than a predetermined threshold. Ballon de sport selon la revendication 1, dans lequel ledit micro-générateur (6) comporte une composition pyrotechnique apte à s'enflammer par effet joule et un actionneur électrique apte à provoquer l'inflammation de ladite composition.Sports ball according to claim 1, wherein said micro-generator (6) comprises a pyrotechnic composition adapted to ignite by joule effect and an electric actuator capable of causing the ignition of said composition. Ballon de sport selon la revendication précédente, dans lequel la composition pyrotechnique est du propergol solide.Sports ball according to the preceding claim, wherein the pyrotechnic composition is solid propellant. Ballon de sport selon la revendication 2 ou 3, dans lequel l'actionneur électrique comporte un circuit capacitif alimenté par une micro-pile.Sports ball according to claim 2 or 3, wherein the electric actuator comprises a capacitive circuit powered by a micro-battery. Ballon de sport selon la revendication 2 ou 3, dans lequel l'actionneur électrique comporte un circuit capacitif alimenté par un dispositif convertisseur d'une énergie de déformation du ballon en une énergie électrique, du type dispositif piézoélectrique.Sports ball according to claim 2 or 3, wherein the electric actuator comprises a capacitive circuit powered by a device for converting a balloon deformation energy into an electrical energy of the piezoelectric device type. Ballon de sport selon l'une quelconque des revendications précédentes comportant un capteur d'une température interne du ballon.Sports ball according to any one of the preceding claims comprising a sensor of an internal temperature of the balloon. Ballon de sport selon l'une quelconque des revendications précédentes, comportant plusieurs micro-générateurs de gaz répartis régulièrement de manière à limiter l'effet de balourd.Sports ball according to any one of the preceding claims, comprising a plurality of micro-gas generators regularly distributed so as to limit the unbalance effect. Procédé de gestion de la pression interne d'un ballon de sport comportant plusieurs micro-générateurs de gaz (6) et un capteur de pression (10) comportant les étapes : - mesure de la pression interne du ballon de sport par le capteur de pression, - comparaison de la valeur de la pression avec une valeur seuil, - activation d'au moins un micro-générateur de gaz si la valeur de la pression mesurée est inférieure au seuil. A method for managing the internal pressure of a sports balloon comprising a plurality of micro-gas generators (6) and a pressure sensor (10) comprising the steps of: measuring the internal pressure of the sports balloon by the pressure sensor, - comparison of the value of the pressure with a threshold value, activation of at least one micro-gas generator if the value of the measured pressure is below the threshold. Procédé de gestion de la pression interne d'un ballon de sport selon la revendication précédente, dans lequel l'activation des micro-générateurs s'effectue selon un ordre préétabli pour éviter un effet de balourd.A method for managing the internal pressure of a sports balloon according to the preceding claim, wherein the activation of the micro-generators is carried out in a pre-established order to avoid an unbalance effect.
EP07112910A 2006-07-25 2007-07-23 Sports ball comprising automatic means of inflation and method of managing the internal pressure of such a ball Not-in-force EP1882499B1 (en)

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FR0653095A FR2904231B1 (en) 2006-07-25 2006-07-25 SPORTS BALL WITH AUTOMATIC INFLATION MEANS AND METHOD FOR MANAGING THE INTERNAL PRESSURE OF SUCH A BALLOON

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AT (1) ATE441466T1 (en)
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Also Published As

Publication number Publication date
US7654922B2 (en) 2010-02-02
FR2904231B1 (en) 2008-10-17
JP2008029841A (en) 2008-02-14
DE602007002233D1 (en) 2009-10-15
ATE441466T1 (en) 2009-09-15
FR2904231A1 (en) 2008-02-01
US20080026886A1 (en) 2008-01-31
EP1882499B1 (en) 2009-09-02

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