The travelling cabin comprises a plurality of closed, individual cabins, whereof the chassis is movably supported on a circular rail. The cabins are interconnected by upper and lower coupling rods. For the rotary movement of the cabins, the cage is provided with a cabin rotary drive constructed as a...http://www.google.de/patents/US4712652?utm_source=gb-gplus-sharePatent US4712652 - Elevator for transporting people and goods with an annular travelling cabin
