Exercise devices – User manipulated force resisting apparatus – component... – Utilizing resilient force resistance
Reexamination Certificate
1999-02-16
2001-05-01
Yu, Mickey (Department: 3764)
Exercise devices
User manipulated force resisting apparatus, component...
Utilizing resilient force resistance
C473S425000, C273S330000
Reexamination Certificate
active
06224523
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to an exercise device, and more particularly to a cord controller that is fastened with a game racket having an oval or round frame of network of catgut, silk, nylon, etc. The cord is fastened at one end thereof with a ball, which can be retrieved by the cord after the ball is hit by the game racket.
BACKGROUND OF THE INVENTION
Certain ball games, such as badminton and tennis, are played by at least two persons using the rackets to hit the ball or shuttlecock back and forth in a court. In other words, it is impossible for a person to play the ball games described above.
There is a conventional wooden game racket to which an elastic cord is attached such that the free end of the elastic cord is fastened with a ball which can be retrieved by the elastic cord after the ball is hit by the racket. The racket is not provided with a means for adjusting the length of the elastic cord in accordance with the body size or the training need of a player. The excessive length of the elastic cord is shortened by winding the cord around the racket. Such a primitive way of adjusting the length of the elastic cord makes it difficult for the player to hit the ball with precision.
SUMMARY OF THE INVENTION
It is therefore the primary objective of the present invention to provide a cord controlling device which is fastened with a game racket for retrieving a ball that is fastened with the free end of the cord. The cord can be easily adjusted in length by the device which can be detachably fastened with the game racket by a player.
The cord controlling device of the present invention comprises a housing which is composed of an upper cover and a base. The base is provided with a fastening portion by which the device is fastened with the frame of a game racket. The base is provided at the center of the upper side thereof with a shaft on which a rotary seat is rotatably mounted. The rotary seat is provided with a receiving space in which a volute spring is located such that one end of the volute spring is fastened with the rotary seat and that other end of the volute spring is fastened with the shaft. A cord reel is mounted on the rotary seat for winding up or letting out a cord which is wound on the cord reel such that the cord is fastened at one end thereof with the cord reel and that other end thereof is let out via a cord outlet of the housing for fastening with a ball.
The foregoing objective, features, functions, and advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 2128610 (1938-08-01), Heimers
patent: 2945695 (1960-07-01), Heimers et al.
patent: 4129110 (1978-12-01), Kubrak
patent: 5649699 (1997-07-01), Todoroff
patent: 5816928 (1998-10-01), Colonna
Browdy and Neimark
Hwang Victor
Yu Mickey
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