A portable, stable rope-pulling exercise machine. The machine has a stable support frame, a number of rope pulleys and rope guides mounted on the frame, an endless rope extending around the pulleys and guides to form a path which includes a horizontally extending rope pulling portion, and hydraulic braking...http://www.google.es/patents/US7060003?utm_source=gb-gplus-sharePatente US7060003 - Horizontal rope pulling apparatus
