Babolat VS

Sainte-Foy-lès-Lyon, France

Babolat VS

Sainte-Foy-lès-Lyon, France
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This method for calculating a repeatability index of gestures and shots of a player striking a tennis ball with a racket, includes:


Method for calculating a parameter representing a tennis players endurance during a game period including a series of game sessions, includes: a) measuring the linear acceleration and angular speed of the racket during each stroke hit by the player, b) calculating the power developed by the player during each stroke using linear accelerations and angular speeds measured in step a); c) calculating the players average power defined as the average of power levels developed during each stroke calculated in step b); d) calculating the energy expended by the player during the last game session, the energy expended being equal to the number of strokes executed during the session multiplied by the average power calculated in step c) raised to a predetermined power, e) calculating the parameter, defined by the product of the number of game sessions per week during the game period, multiplied by the energy calculated in step d).


A method of processing data representing the performance of a tennis player in a display device includes: a) calculating, using data including physical quantities measured during a game period including one or several game sessions and transferred into a system for calculating of the display device, at least three parameters representing the players performance during this game period, b) displaying, in the form of a diagram including one axis for each parameter, with the axes forming a star with several branches, points corresponding to the values of the parameters on the axes so as to form a generally polygon-shaped closed contour encompassing or passing through the points, and c) alternatively increasing and decreasing the surface area delimited by the closed contour according to a frequency of the variation calculated according to the effective game time of the player measured during the last game session of the game period.


Method for calculating a parameter (P) representing a tennis players technical level during a series of strokes includes: a) determining, for each executed stroke, an impact zone of the stroke on the stringed zone of a tennis racquet used by the player; b) determining, for each executed stroke, the type of stroke, with the type being chosen from a list including at least two type of strokes; c) using the impact zones determined in step a) and types of strokes determined in step b) for the series of strokes, determining a zone index for each type of stroke; d) using the zone indexes calculated in step c), calculating the parameter value, using the following formula: where C is the number of stroke types, Zi, with i between 1 and C, is the zone index, and Ni is the number of strokes executed per type of stroke i.


Patent
Babolat Vs | Date: 2011-07-19

A container or can- for balls or the like for a racket sport, in particular for tennis balls or badminton shuttlecocks, is provided. The container or can includes a hollow tube containing the balls or shuttlecocks, to which a cap is fastened. The cap includes a ring suitable for being secured to the hollow tube and a cover that hinged relative to the ring. The joint between the cover and the ring includes at least one hinge and a return member suitable for moving the cover into a position oriented at an angle of more than 90 relative to the ring when opening the cover.


Patent
Babolat Vs | Date: 2013-10-02

The badminton racket (1) includes a frame (2), a handle (4) and a shaft (6) connecting the frame to the handle. It defines a first direction (D_(1)) parallel to a longitudinal axis (X_(1)) of the shaft, a second direction (D_(2)) perpendicular to the first direction and parallel to a plane (P_(8)) in which strings (8) extend mounted in the frame (2), and a third direction (D_(3)) perpendicular to the first and second directions (D_(1), D_(2)) and the plane (P_(8)) of the strings. The bending rigidity of the shaft (6) in the third direction (D_(3)) is greater than its bending rigidity in the second direction (D_(2)).


Patent
Babolat Vs | Date: 2015-12-16

This sport shoe includes an outer sole suitable for ground contact, an inner sole situated under a foot of an athlete, and an intermediate sole between the outer and inner soles. The outer sole is divided, along a longitudinal axis of the shoe, into at least three transverse zones including a front zone located at least partially below the toes of the foot, a median transverse zone provided to be at least partially located below a region of the foot extending between the base of the toes and a front end of the arch of the foot, and a rear zone provided to be located at least partially below a region of the foot extending backward from the front end of the arch of the foot. The three transverse zones are separated by transverse flexion lines whose flexibility is greater than the flexibility of the three transverse zones.


This system (1) for blocking one or more strings (C) of a racket on the stringing machine comprises a guide support on which two clip holders (3) each provided with a clip (37) for gripping a string (C) are mounted. Each of the clip holders (3) is movable relative to the support along a trajectory forming a closed contour around a central axis (X5) of the support.


This system (S) for tensioning a racket string (C) includes a traction module (1) suitable for exerting a traction force (T) on a string (C) of a racket, including a grip (3) including two opposite jaws (32) suitable for gripping the string (C) between them when it is tensioned, and a traction head (5) on which the grip (3) is mounted, the jaws (32) being translatable simultaneously relative to the traction head (5) and arranged such that the translation of the jaws (32) causes them to tighten around the string (C), a rail (7) on which the traction head (5) of the traction module (1) is mounted translatably, and a traction motor able to translate the traction head (5) of the traction module (1) on the rail (7), via a driving system (13). The system includes element (15) for transmitting movement between the driving system (13) of the traction head (5) and the jaws (32), this transmission element being able to initiate the translation of the jaws (32) relative to the traction head (5) in the direction gripping the string (C).


Patent
Movea Inc and Babolat Vs | Date: 2013-05-23

A tennis racket includes a head including a frame surrounding a netting of string, a holding handle (2), a vibration sensor (14.1), a triaxial linear acceleration sensor (14.2), and a triaxial angular speed sensor (14.3).

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