Patent ID: 7340989

Claim:
An industrial truck having a mast and a piston/cylinder arrangement, comprising a cylinder and a piston, which can be extended out of and withdrawn into said cylinder, as a drive and/or as guidance for a first component of said mast for the purpose of moving the first component in relation to a second component of said mast, the piston being coupled for force transfer purposes to a mast component associated therewith, and the cylinder being mounted on a cylinder bearing of the respective other mast component associated with the cylinder and being coupled to said mast component for force transfer purposes, wherein the cylinder is in bearing engagement with the cylinder bearing such that it can be moved in relation to the cylinder bearing, wherein the cylinder has a cylinder tube and a cylinder closure having a piston opening and wherein the cylinder has a bearing formation having a supporting surface provided on the cylinder closure and surrounding the cylinder in the circumferential direction, said supporting surface being in bearing engagement with a cylinder bearing surface of the cylinder bearing, wherein at least one of the supporting surface and the cylinder bearing surface is curved convexly, at least in the region of the bearing engagement, about two axes of curvature, which are orthogonal both with respect to one another and with respect to the cylinder longitudinal axis direction, and the respective other cylinder bearing surface and supporting surface is curved concavely, at least in the region of the bearing engagement, about two axes of curvature, which are orthogonal both with respect to one another and with respect to the cylinder longitudinal axis direction, and wherein the supporting surface and the bearing surface are curved such that they bear flat against one another, and wherein the cylinder can be displaced in relation to the cylinder bearing in at least one displacement direction, which is orthogonal with respect to the cylinder longitudinal axis direction.