Patent ID: 6688481
Filing Date: 2004-02-10
Classification: B60K,B60L,B60Y,B66C,E02F,Y02T

Abstract:
A mobile truck crane for movement about a jobsite under its own power without restriction to a predetermined travel path, comprising:an undercarriage; a superstructure rotatably mounted on the undercarriage; a counterweight; a slewable boom assembly; an operator's cab, wherein the counterweight, the slewable boom assembly and the operator's cab are supported on the superstructure; at least one motor for propelling the undercarriage in an operating direction, said motor being an electric motor; and a power supply unit for supply of electric power for driving and crane operations, said power supply unit drivingly connected via a cabling to the at least one electric motor and including a multi-system drive formed by a combination of a diesel-electric drive with a battery, wherein at least one of the diesel-electric drive and the battery of the power supply unit forms part of the counterweight in the superstructure, wherein the multi-system drive is constructed to provide the electric power supply predominantly by the diesel-electric drive and temporarily by the battery, and wherein the diesel-electric drive is located in a rear portion of the undercarriage.