Patent ID: 7194860
Filing Date: 2007-03-27
Classification: B60T,F16D

Abstract:
1. A hydraulic cylinder, comprising a housing having a cylinder wall, in which housing a piston, having an operating position and a rest position, is received in a longitudinally displaceable manner, which piston together with the cylinder wall delimits a pressure chamber and has a running surface for a housing-side sealing element which in the operating position of the piston co-operates with the running surface thereof in order to seal off the pressure chamber, there being an after-running device and an after-running region, the after-running device having equalization grooves, and the pressure chamber, in the rest position of the piston, being connected to the after-running region by the equalization grooves of the after-running device; wherein the cylinder wall of the housing is provided with profiled cut-outs on its piston-side end at least in a lower region in the installed position of the cylinder, which cut-outs each have two boundary surfaces which, seen in the circumferential direction of the cylinder wall, are located on the sides of the respective cut-out; and a radially outer surface therebetween wherein in the installed position of the cylinder the upper one of the boundary surfaces of each cut-out rises up to the equalization grooves of the after-running device.