Patent ID: 8308151

Claim:
An elevator assembly, comprising: a carrier; a first arm and a second arm, each arm having a primary portion pivotally connected to the carrier, and a secondary portion pivotally connected to the primary portion; a first gear system that interconnects the first arm and the second arm for synchronous rotation with respect to the carrier in opposite directions; a pair of second gear systems that establish a geared relationship between the secondary portions of the arms and the carrier; a support member connected to the secondary portions of the arms, wherein rotation of the primary portions of the arms with respect to the carrier drives the support member between a neutral position and at least a first extended position; each second gear system having a first plurality of gear teeth connected to the carrier in a fixed angular relationship with respect to the carrier; each second gear system having a second plurality of gear teeth connected to the secondary portion of the respective arm in a fixed angular relationship therewith, wherein the second plurality of gear teeth are in a geared relationship with the first plurality of gear teeth; and each second gear system having at least one intermediate gear to provide the geared relationship between the first plurality of gear teeth and the second plurality of gear teeth.