Patent ID: 8490724
Filing Date: 2013-07-23
Classification: B62D,E21B

Abstract:
1. A load transporting apparatus configured to move a load over a base surface in one or more incremental steps each including a load-movement phase and a recovery phase, the load transporting apparatus comprising: a lift mechanism structured to lift a load-bearing frame supporting the load; a support foot connected to the lift mechanism, the support foot structured to interface with the base surface; a roller assembly coupled to the lift mechanism; a travel mechanism coupled to the roller assembly, the travel mechanism structured to displace the roller assembly relative to the support foot; one or more guide devices coupled to the support foot to be adjacent to the roller assembly; and one or more biasing devices coupled to the guide devices, the biasing devices structured to become activated during the load-movement phase when the roller assembly is non-linearly displaced by the travel mechanism relative to a longitudinal center line of the support foot, and structured to return the support foot to a centered position relative to the roller assembly about the longitudinal center line of the support foot during the recovery phase.