Patent ID: 8662507

Claim:
An unpowered, self-elevating and self-lowering home appliance assembly cart for supporting and transporting a plurality of home appliance assembly components, the assembly cart comprising: a base; and a self-leveling and self-lowering assembly component suspension and supporting system including: a mast; a rail system moveably coupled to the mast; a plurality of arms extending from the rail system, each pair of arms of the plurality of arms for supporting a home appliance assembly component of the plurality of home appliance assembly components at a respective position along a first vertical height along the rail system; and means for automatically self-leveling and self-lowering the rail system with respect to the mast to position the pair of arms of the plurality of arms within a predetermined acceptable ergonomic work zone with respect to a second vertical height along the mast based on an unloaded state, a partially loaded state, and a loaded state of the plurality of arms, the predetermined acceptable ergonomic work zone for loading and unloading the home appliance assembly component from the pair of arms, wherein an upper part of the rail system is configured to extend above the second vertical height of the mast when the assembly cart is in the unloaded state such that a lowermost pair of arms of the plurality of arms on the rail system is positioned within the predetermined acceptable ergonomic work zone when the assembly cart is in the unloaded state, and wherein the rail system is configured to be positioned with respect to the mast when the assembly cart is in the partially loaded state or the loaded state such that an uppermost pair of arms of the plurality of arms is positioned within the predetermined acceptable ergonomic work zone when the assembly cart is in the partially loaded state or the loaded state.