Exercise devices – Utilizing electromagnetic force resistance
Reexamination Certificate
2000-10-26
2001-09-04
Barrera, Ramon M. (Department: 2832)
Exercise devices
Utilizing electromagnetic force resistance
C482S063000, C310S077000, C310S093000, C310S105000, C310S106000, C310S263000, C188S161000, C188S163000, C188S164000, C188S267000
Reexamination Certificate
active
06283901
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to an exercise or rehabilitation machine, and more particularly to a device for providing the exercise or rehabilitation machine with resistance.
BACKGROUND OF THE INVENTION
The conventional exercise or rehabilitation machine is generally provided with a resistance device, which brings about resistance by means of friction or oil pressure. The friction-type resistance device is susceptible to wear and load unstableness, which unable the device to control the magnitude of resistance with precision. The oil pressure resistance device is vulnerable to oil leak and is rather noisy while in operation.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a device for effecting resistance. The device of the present invention is free of the deficiencies of the conventional devices described above.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a resistance device which is designed for use in an exercise or rehabilitation machine. The device of the present invention comprises an excited magnetic cylinder, an excited magnetic coil, a rotary cylinder, and two support frames. The excited magnetic coil is disposed in the excited magnetic cylinder which is provided with a fixed shaft. The rotary cylinder is rotatably mounted on the fixed shaft. The excited magnetic cylinder is provided in the periphery of the midsegment thereof with an annular wavy interstice. The ridges of the wavy interstice are provided with a projection which is used as a magnetic pole induction area. The rotary cylinder is provided with a slot which is fitted over the magnetic pole induction area. The eddy current induced by the rotary cylinder interacts with the magnetic flux to bring about a rotation moment capable of an effective control of an arresting wheel with precision.
The foregoing objective, features, 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: 4713567 (1987-12-01), Fey et al.
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