Patent ID: 8622426

Claim:
A height-adjustable support for semi-trailers, comprising: a shaft tube body adapted to fastened to a semi-trailer frame; a slidable support inner tube arranged in the shaft tube body and having a foot mounted to an end region thereof, wherein the slidable support inner tube is operably coupled to the shaft tube body by a nut located on a spindle which is drivable by a transmission; wherein the transmission comprises a low-gear pinion and a fast-gear gearwheel, the low-gear pinion is coupled to a drive shaft and can mesh with a low-gear gearwheel, the fast-gear gearwheel is adapted to drive a fast-gear pinion, and wherein the fast-gear gearwheel is coupled to the drive shaft; and wherein the drive shaft is supported in a sleeve bearing such that the drive shaft is fixed for rotation with respect to the sleeve bearing and such that the drive shaft is slidable with respect to the sleeve bearing and wherein the sleeve bearing, is supported rotatably in a load bearing base supporting the spindle.