Stair climbing exercise apparatus

Details Stair climbing exercise apparatus Stair climbing exercise apparatus

1990-10-10

1991-07-23

Crow, Stephen R.

Undertaking

272132, A63B 2300

Patent

active

050337335

ABSTRACT:
A frame structure mounts two side-by-side steps which are pivotally connected to the frame structure for up-and-down motion. The first step is connected, via a strap, to a first pulley, the strap being wrapped around the pulley. The second step is connected by a second strap to the second pulley and the second strap is wrapped around the second pulley. A shaft extends between the first and second pulleys and the first pulley is connected to the shaft when the pulley rotates in one direction but is not connected to the shaft when it rotates in the other direction. The second pulley is, likewise, connected to the shaft when it rotates in the same one direction but is not connected to the shaft when the pulley rotates in the other direction. The resistance element of the apparatus is an electromagnetic brake which includes a rotatable armature, and the rotary motion of the shaft is transmitted to the armature by a planetary gear arrangement.

REFERENCES:
patent: 4718665 (1988-01-01), Airy et al.
patent: 4949993 (1990-08-01), Stark et al.

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