Stair climbing exercise apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 23, 1991
Grant Date -
N/A
app pub date -
Oct 10, 1990
filing date -
Oct 10, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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