| 摘要 |
Cylinder/piston combination moved by a pressure medium, which cylinder/piston combination comprises an extended cylinder space 1 and a piston assembly 3, 8 which consists of two parts and is arranged in such a manner that its parts will move in opposite directions in the longitudinal direction of the cylinder space 1. The piston rod 6 in the first part 3 in the piston assembly has a tubular construction. The first part 3 is provided with a seal between the piston 4 and the internal surface 2 of the cylinder space 1. The cylinder space 1 is provided with a connection 27, through which the pressure medium can be made to pass into the space 31 delimited by the cylinder space 1 and the outer surface of the first part 3. The second part 8 is constructed with dimensions which allow it to fit inside the first part 3 and arranged in such a manner that it can be moved in relation to the latter. The combination includes an auxiliary piston 14 which is arranged around the piston rod 13 in the second part and sealed in relation to the internal surface 2 of the cylinder space 1. The cylinder space is provided with a connection 25 which allows passage of the pressure medium into the space 29 delimited by the cylinder space 1 and that auxiliary piston end surface 20 which faces away from the first part 3. The cylinder space 1 is provided with a second connection 26 which allows passage of the pressure medium to that auxiliary piston end surface 21 which faces towards the first part 3 when the piston 9 in the second part 8 is in engagement with the auxiliary piston 14.
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