Patent ID: 8443990

Claim:
A mobile rack system comprising: a first rack mounted for movement on a floor; a second rack mounted for movement on the floor; a mobile carriage having wheel structure engaging the floor and supporting the first rack and the second rack for rolling movement on and along the floor; and a flue spacer having interfitting members adjustably interconnecting the first rack and the second rack, and enabling the first rack and the second rack to move relative to another when the wheel structure of the mobile carriage moves on and along portions of the floor that are not level, wherein the flue spacer includes a first mounting member coupled to the first rack, a second mounting member coupled to the second rack, a first extension connected to the first mounting member, and a second extension connected to the second mounting member, wherein the first extension is interfitting in the second extension in a manner that allows the first extension to slide along a first axis within the second extension.