Patent ID: 7121372

Claim:
Lift truck with at least three wheels and a telescopic arm, a front end of the telescopic arm extends in front of the front wheels in a load transport position, said truck comprising: one steerable rear wheel and two front wheels; a driver station and a motor propulsion group secured to a chassis, said telescopic arm comprising a first hollow shaft and a second shaft slidable within said first shaft, wherein the truck comprises a system limiting the maximum speed of advance as a function of a wheel turning angle of the rear wheel of the truck, so as to ensure the lateral stability of the truck when turning, wherein the truck has a hydraulic transmission, wherein said system limiting the maximum speed of advance as a function of the wheel turning angle of the truck is connected to or coacts with the hydraulic transmission of the truck, wherein the system limiting the maximum speed of advance as a function of the wheel turning angle comprises a control pressure reduction valve for the hydraulic transmission of the truck, and wherein said control pressure reduction valve is a valve with a tappet coacting with an actuator connected to the rear wheel of the truck.