Load applying device for an exercise bicycle

Details Load applying device for an exercise bicycle Load applying device for an exercise bicycle

1990-03-02

1991-12-17

Crow, Stephen R.

Undertaking

272129, 310 94, A63B 2100

Patent

active

050729306

ABSTRACT:
A device for applying a load to a rotating shaft of an exercise bicycle which receives the load. A rotor, which is to be rotated by the rotating shaft of the exercise bicycle, is rotatably mounted by a bearing to a fixed main shaft of the load applying device. The rotor is a tubular magnetic conductor having a closed end, and an open end and a cylindrical wall. An electromagnet includes a first and a second disk coaxially fixed to the main shaft and sleeved by the cylindrical wall of the rotor. The first and second disks respectively serve as a first and a second pole in a magnetic field created by the electromagnet. An annular exciting coil is fixed between the first and second disks. Each of the first and second disks has radially projecting teeth extending from the periphery thereof but not in contact with the cylindrical wall of the rotor. A closed magnetic flux in the magnetic field of the electromagnet passes through the first and second poles of the electromagnet and the cylindrical wall of the rotor. When the rotor is rotated, the rotor cuts the magnetic field and thereby produces an induced eddy current, causing an eddy current brake effect to the rotor.

REFERENCES:
patent: 4713567 (1987-12-01), Fey et al.
patent: 4775145 (1988-10-01), Tsuyama
patent: 4780637 (1988-10-01), Wolcott
patent: 4790528 (1988-12-01), Nakao
patent: 4800310 (1989-01-01), Nakao
patent: 4817938 (1989-04-01), Nakao

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