Abstract: Lift trucks are intended for the transportation of loads of differing weight, inter alia, between two clamping jaws. A device for controlling the force exerted by the clamping jaws in such lift trucks (10) is characterized in that the load (20) is equipped with a data carrier (21) which holds information in regard to the weight of the load (20) in the form of a code. Moreover, the lift truck (10) includes a reading device (30) for reading this code, a computing unit (31) and a storage unit (32). The computing unit (31) extracts the information in regard to the weight of the load (20) from the read-out code. The storage unit (32) contains a data matrix which contains a pressure that is required for the clamping force of the clamping jaws in dependence on the potential loads. There is provided a control device (33) which, with the aid of this data matrix, effects a continuous control of the clamping force of the clamping jaws (15) of the lift truck (10).

Abstract: An attachment for a fork-lift truck has a vertical support plate, secured to an adjacent lifting plate of the truck and laterally shiftable therealong by a fluidic jack, which is provided with two pairs of vertically spaced, horizontal guide rails slidably engaged by complementarily profiled pairs of mounting rails which are rigid with two outer prongs shiftable relatively to the support plate by two further jacks. Two inner prongs frictionally engage the mounting rails of the respectively adjoining outer prongs for lateral entrainment thereby between limits defined by adjustable stops on the support plate.