Patent ID: 7748548

Claim:
A transporter, said transporter comprising: (a) a first unit; (b) at least one second unit; (c) a coupler for coupling said first unit and said second unit and defining a coupling axis from said first unit to said at least one second unit through said coupler; (d) an articulated joint defined between the coupler and either of said first unit or said at least one second unit; (e) at least one lever carried by the articulated joint and having a traveling force mechanism connected therewith for providing load leveling forces to the transporter in response to movement of the lever; and (f) a fulcrum arm with a spring assembly in engagement with the coupler for biasing the ends of said coupler upwardly; (g) wherein said coupler is coaxially aligned with the coupling axis thereby permitting rotational movement of said coupler perpendicular to the coupling axis.