A walking exerciser includes a treadmill body, and a threaded rod which can be driven by a driving unit to extend from or withdraw into a movable tube. When the treadmill body is disposed at a horizontal position, the threaded rod is in a withdrawn position. Extension of the threaded rod turns the treadmill...http://www.google.fr/patents/US6387016?utm_source=gb-gplus-shareBrevet US6387016 - Walking exerciser having a mechanically operated treadmill body
Walking exerciser having a mechanically operated treadmill body
