Exercise devices – Involving user translation or physical simulation thereof – Bicycling
Reexamination Certificate
1999-06-03
2001-05-22
Donnelly, Jerome W. (Department: 3764)
Exercise devices
Involving user translation or physical simulation thereof
Bicycling
C482S063000, C482S903000, C188S161000
Reexamination Certificate
active
06234938
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a magnetic damper, and more particularly to a magnetic device intended for use in an exercise bike or other exercise machines.
BACKGROUND OF THE INVENTION
There are a variety of dampers which are available in the market place today and are different in form and manufacturing principle. For example, certain dampers that are used in the exercise bike are provided with a rotary wheel and a belt by means of which the rotary wheel is tightened to bring about a resistance force. The belt is susceptible to wear or damage. There are also certain dampers which are provided with an electric motor to bring about a resistance force in conjunction with a ratchet wheel. Such electrically-operated dampers as described above are limited in use in that they are virtually useless without a power source.
SUMMARY OF THE INVENTION
The primary objective of the present invention is therefore to provide an exercise bike or machine with a damper capable of bringing about a resistance force without the use of friction force or electricity.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a magnetic device for generating a resistance force. The magnetic device comprises two disks which are each provided with a plurality of magnets for bringing about a resistance force by means of the attractive force and the repulsive force of the magnets. The magnitude of the resistance force is adjusted by the magnetic flux density of the magnets of the two disks.
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 five preferred embodiments of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 3995491 (1976-12-01), Wolfla, II
patent: 5879273 (1999-03-01), Wei et al.
Browdy & Neimark
Donnelly Jerome W.
Nguyen Tam
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