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Document |
Document Title |
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7559859 |
Tennis training aid
A tennis training aid can be used to teach proper wrist and racket position for swings such as a forehand ground stroke, two-handed backhand stroke, or volley. Such a tennis training aid is...
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7445570 |
Tennis training aid
A tennis training aid can be used to teach proper wrist and racket position for swings such as a forehand ground stroke, two-handed backhand stroke, or volley. A training aid includes a forearm...
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7335118 |
Shock absorbing and sound producing device for tennis racket
A device mounted in a tennis racket includes a cylindrical cushioning member including an annular groove, a central chamber, an axial channel crossed the chamber, and two recesses at its both ends;...
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7147581 |
Tennis stroke training device
A racquet stroke training device adapted to “fix” a user's forehand racquet stroke comprises, in one embodiment, a band adapted to be worn on a user's arm above the user's elbow, a glove...
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6830520 |
Adjustable embedded bat speed indicator
An improved baseball swing trainer is presented where a standard wooden bat is modified with an embedded magnetic speed indicator based on a ball bearing and a magnet. The distance between the...
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6648780 |
Tennis training device
A training device which interactively guides a tennis racquet by exerting a towing force on a card which is connected to the tennis racquet. The device includes a vertically adjustable support...
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6645094 |
Tennis stroke training apparatus
An athletic training device having a frame which is attached to a base at lower end and one or more guide rails at a higher end. Attached to the rails are one or more antennas which are resilient...
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6461255 |
Powertube
A baseball training aid includes a hollow tubular member rotatably positioned on an adjustable height stand, for use in practice batting. The hollow tubular member is adjustably positioned to guide...
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6270430 |
Sports trainer
A sports training device which consists of a body belt which can be secured around the body, an elastic cord and an implement holder. The elastic cord is attached to an adjustable length strap on...
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6270434 |
Game racket to show the state of the body of an exerciser
A game racket is provided in the grip portion thereof with a sensor for detecting changes in body characteristic of a person engaging in exercise by using the game racket. The changes in body...
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6134965 |
Device for measuring at least one physical parameter relating to a propelled game ball
A device (1) for measuring the strike velocity of a game ball struck by a striking element, particularly a tennis racket (2), said device being provided directly on the racket. The device comprises...
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6102809 |
Athletic stroke training device
An athletic stroke training device is disclosed. The training device has a semi-rigid shaft that is attached to a player's shoulders or hips by incorporating the shaft into the garment worn by the...
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6056653 |
Tennis exercise device
An exercise device for learning to guide a tennis racquet which includes an upwardly open ball track that is curved approximately like a horseshoe from a top view, and a support device by which the...
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5796005 |
Flex meter for sports game implements
A combination of an implement employed in a sports game to impact with a body, and a device coupled to the implement which measures the natural frequency and the relative amplitude of vibration of...
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5700205 |
Sports training system
A system measures and records deflection of an elongated shaft such as the shaft of a golf club and provides a trace or diagram of the swing of the club. The system includes an elongated rod,...
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5618040 |
Tennis aid
A tennis aid for improving the stroke of a tennis player. The aid includes a wrist band for encircling the wrist of a tennis player and an associated elastic cord attached thereto. The cord is...
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5554033 |
System for human trajectory learning in virtual environments
In an apparatus and method for teaching motor skills to a human subject, learning by a student is based upon imitation of a teacher's motion. The teacher's motion is sensed by a motion sensing...
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5542676 |
Biosensor feedback device for sporting implements
A biosensor feedback device for use in detecting a grip pressure and torque of a hand against a handle of a sporting implement. The device includes a flexible thin film substrate which is...
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5439214 |
Stroke training device
A stroke training device includes a guide member connected between the user's body and a stroking device which will focus the force of body rotation at a constant radius as the user's body moves...
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5340102 |
Racket attachment whistle
A training device for a tennis racket is provided which consists of a clamp for attaching a small whistle transversely to a throat of the tennis racket. A first sound will be made by the small...
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5080362 |
Adjustable point of impact indicating device
An impact sensing device (16) is attached to a sporting implement to provide a visual indication of when the implement strikes a sporting object. The device (16) comprises a cylinder (22)...
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4911441 |
Apparatus for controlling moves of a ball-hitting instrument in ball games
A ball-hitting instrument for playing ball games, comprises a handle and a flat head part (preferably a tennis racket bearing a screen in the head part) and an apparatus for programming and...
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4852875 |
Racquet swing training apparatus
A swing training apparatus for use with a hand held sports implement having a head and a handle with a longitudinal axis extending between the head and handle includes a housing that is mounted to...
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4519608 |
Tennis racket stroke training device
A tennis training device worn by a player and comprising a telescopic and orientable rod--attached to a wide belt--in the dorsal region--thereof and bearing at its end an obstacle--the position of...
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4163552 |
Apparatus for facilitating the practicing of tennis and like games
Apparatus which indicates various stages of forehand or backhand strokes which are practiced by a tennis player with or without a ball, with or without an opponent and without supervision has a...
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4105204 |
Tennis stroke practice device
A tennis stroke practice device comprised of a base plate having an upstanding tubular member positioned thereon to receive a Z-shaped tube adjustably therein with the Z-shaped tube being in turn...
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4094504 |
Signalling device to be used with a sport implement for detecting and indicating the proper or improper use thereof
A signalling device to be used with a sport implement, such as, for example, a tennis racquet or golf club, for detecting and indicating the proper use thereof, includes a plurality of mechanical...
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3937465 |
Tennis stroke training device
A training device for assisting a trainee in stroking a tennis racquet in such manner that the head of the tennis racquet does not shift in a vertical plane below the wrist of the trainee and, as...
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3904199 |
Sports racket stroking trainer
A sports stroke training device having a post for mounting vertically on a vertical surface. The post is provided with a longitudinal groove for adjustably retaining a pivot shaft. An elongated bar...
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3897058 |
Athletic testing device
An athletic testing device for use by athletes in a game where an athletic club is utilized for playing the game and where a controlled force application on the club handle by the user's hand or...
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3866912 |
Tennis-stroke practice target combination
A target structure including a substantially horizontal axially elongated target and deflector structure mounted on an upright support shaft, a tennis-ball simulating structure is centrally mounted...
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3231271 |
Apparatus for practicing strokes with a tennis racket
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