An extension and retraction system for an article of furniture, such as a storage unit, includes a mounting structure for securement to the storage unit, a base arrangement for mounting to a floor or other supporting surface, and a cantilever-type extension and retraction arrangement interposed between...http://www.google.co.uk/patents/US6231138?utm_source=gb-gplus-sharePatent US6231138 - Cantilevered pull-out shelf system
