Thornycroft developed a steam dust-cart in 1896 with a tipper mechanism. Hydraulic dump beds were introduced by Wood Hoist Co. shortly after. Such corporations flourished throughout World War I attributable to massive wartime demand. August Fruehauf had obtained military contracts for his semi-trailer, invented in 1914 and later created the associate automobile, Trucking missions the semi-truck for use in World War I. After the battle, Fruehauf launched hydraulics in his trailers. They provided hydraulic elevate gates, hydraulic winches and a dump trailer for sales in the early 1920s. Fruehauf turned the premier supplier of dump trailers and their famed "bathtub dump" was considered to be the most effective by heavy haulers, road and mining building firms. Galion (now Galion Godwin Truck Body Co.) is the oldest recognized truck physique manufacturer still in operation as we speak.