Patent ID: 7296659

Claim:
A staircase lift for transporting a disabled person between floors, comprising at least one guide rail extending substantially parallel to a stairway, a moveable carrier frame suspended from the at least one guide rail including carrier support means, said at least one guide rail is including internal support surfaces, which are engaged by the carrier support means, said moveable carrier frame includes drive means comprising a rack and pinion drive for displacement of the carrier frame along the guide rail, in which a vertically disposed pinion drive wheel engaging a rack, which is provided on the lower side of the guide rail, the drive means is comprising a first and second guiding means pivotally arranged one behind the other on each side of the pinion drive wheel in the frame, and wherein the pivotally arranged first and second guiding means each include a movement control lever with a first end and where at least one set of guiding members are mounted, a second end at which point the first and second movement control levers are joined to each other by a universal joint, said universal joint being substantially in a traction plane which is perpendicular to the pinion.