Exercise devices – User manipulated force resisting apparatus – component... – Utilizing weight resistance
Reexamination Certificate
1999-03-19
2001-02-13
Mulcahy, John (Department: 3764)
Exercise devices
User manipulated force resisting apparatus, component...
Utilizing weight resistance
C482S098000, C482S108000
Reexamination Certificate
active
06186928
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to an exercise device, and more particularly to an adjustable dumbbell.
BACKGROUND OF THE INVENTION
The conventional dumbbell of the most primitive type is made integrally of a metal material by casting and is therefore provided with a fixed weight. The conventional dumbbell of the more advanced type is provided with a plurality of round weights joined by a short bar by which it is lifted or swung about in the hand for muscular exercise. Such a dumbbell is therefore adjustable in weight. The round weights of the dumbbell are movable and can therefore accidentally fall on the ground to inflict a wound on the dumbbell user or bystanders.
With a view to overcoming the drawbacks of the conventional dumbbells described above, a prior art dumbbell is provided with a plurality of rectangular weights. The number of weights that can be lifted along with the dumbbell main body can be manipulated by changing the position of a fastening pin in a groove. In light of the fastening pin being located insecurely in the groove, the weights can accidentally fall on the ground at the time when the dumbbell is in use. In addition, after a prolonged use of the dumbbell, the fastening pin is vulnerable to deformation, thereby causing the fastening pin to be unable to press securely against the connection rod of the weights.
SUMMARY OF THE INVENTION
It is therefore the primary objective of the present invention to provide a dumbbell which is adjustable in weight and is free from the drawbacks of the conventional dumbbells described above.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a dumbbell which is made up of a carrying seat, a plurality of weights, and a selection device. The carrying seat is formed of two parallel plates, two hollow rods, and a grip. Each of the two parallel plates is provided with a plurality of through holes corresponding to the hollow rods, and a plurality of carrying grooves. One of the plates is provided at the top thereof with a receiving cell. Each of the weights has two identical block bodies each having two through holes corresponding to the through holes of the plates, and a plurality of carrying grooves. Two connection rods are disposed between the bottoms of the two block bodies and are different in length to facilitate the juxtaposing of the weights at the outer side of the carrying seat, thereby enabling each of the connection rods to press against a predetermined carrying groove. The selection device is disposed in the receiving cell and is composed of an adjustor, and two pins which are disposed in the two hollow rods such that the pins are connected at one end thereof with the adjustor, and that other end of the pins is corresponding in location to a predetermined through hole of the plates, and further that the two pins can be moved into or out of the hollow rods, thereby enabling the ends of the pins to extend into the through holes of the block bodies. The carrying seat is thus coupled with a desired number of the weights.
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patent: 6099442 (2000-08-01), Krull
Browdy and Neimark
Hwang Victor K.
Mulcahy John
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