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AssigneeFTE automotive GmbH
InventorRudolf Troster
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A hydraulic cylinder, in particular a master cylinder for a hydraulic clutch actuation system for motor vehicles, comprises a housing having a cylinder wall, in which housing a piston is received in a longitudinally displaceable manner. The piston, together with the cylinder wall, delimits a pressure chamber and has a running surface for a housing-side sealing element which in an operating position of the piston co-operates with the running surface thereof in order to seal off the pressure chamber, whereas the pressure chamber in a rest position of the piston is connected to an after-running region by equalization grooves of an after-running device. 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 an upper boundary surface which in the installed position of the cylinder rises up to the equalization grooves of the after-running device. As a result, a hydraulic cylinder of simple design is provided which has an improved deaeration behavior compared to the prior art.
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;
A master cylinder for a hydraulic clutch actuation system for motor vehicles, 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;
Dependencies are inferred from the claim text.