Patent ID: 7347484

Claim:
A lift mechanism mounted to a support for raising and lowering a first bed and a second bed, the lift mechanism attached to a side of the first and the second beds and comprising: at least one chain, at least one bottom bracket connected to the chain and attached to the first bed, at least one top bracket attached to the second bed and comprising: a chain guide member for guiding the chain, the chain guide member comprising first and second members that are separated by at least one spacer, at least one of the first and second members receiving the chain; and a bed support member connecting to the at least one spacer of the chain guide member, the bed support member being attached to the second bed, a drive mechanism for controllably moving the chain to move the bottom bracket and the bed between a respective raised position and lowered position, and a frame assembly at least partially housing the at least one chain, the at least one bottom bracket, the at least one top bracket, and the drive mechanism, wherein the at least one top bracket is supported by the at least one bottom bracket as the first and the second beds are lowered until the at least one top bracket is stopped by a stopper mounted to the frame assembly.