US Patent 10464793 Industrial truck comprising a device for reducing vibrations

An industrial truck is described, the industrial truck comprising a chassis,a mast arranged on the chassis in an upright position, a load-carrying apparatus, which is configured for receiving a load that is to be transported,a support structure that supports the load-carrying apparatus on the mast and can be moved, together with the load-carrying apparatus, upwards and downwards on the mast, and comprisinga device for reducing vibrations,wherein the device for reducing vibrations has at least one additional mass body, which is supported by the mast or the components connected thereto and is not constantly rigidly coupled to the mast or the support structure or the load-carrying apparatus, but is movably mounted by a bearing arrangement such that it is movable relative to the mast in response to mast vibrations, in particular to mast vibrations having horizontal vibration components, in order to counteract mast vibrations.