Stair lift has parallelogram jointed bearer structure with parallel vertical longitudinal linkages over the entire roller guide track length and parallel horizontal cross-linkages
DE10101498C1
Stair lift, used by elderly or disabled people, has seat pivoted to carrier block moved along fixed guide paths via rollers supported from carrier block by pivot mountings
DE10014002A1
Vertical elevator, has drive mechanism integrated into counterweight attached to lift car traction device