Patent ID: 7770904

Claim:
A materials handling vehicle comprising: a vehicle frame; a drive wheel mounted to the vehicle frame; a first caster assembly mounted to the vehicle frame, wherein the first caster assembly is located on a right side of the drive wheel, and wherein the first caster assembly comprises a first dampening device; a second caster assembly mounted to the vehicle frame, wherein the second caster assembly is located on a left side of the drive wheel, and wherein the second caster assembly comprises a second dampening device; and a torsion rod connecting the first caster assembly to the second caster assembly, wherein the torsion rod is configured to transfer a torsional moment to a caster of the second caster assembly when a caster of the first caster assembly undergoes a vertical displacement in an upward direction towards the vehicle frame, and wherein an amount of compression of the second dampening device varies from that of the first dampening device as a result of the transferred torsional moment.