A stacker-retriever lift carriage is disposed to be raised, lowered and positioned, in selected positions with respect to a pair of spaced support masts, by a flexible wire cable connected between a lift drive and the lift carriage. The lift carriage carries a telescoping shuttle which includes a shuttle...http://www.google.de/patents/US4595332?utm_source=gb-gplus-sharePatent US4595332 - Shuttle
