| 主权项 |
1. A pneumatic deceleration device (10) comprising
a cylinder (21), a piston (51) movably disposed in the cylinder (21) and having a piston rod (42) with a piston rod head (43) for guiding the piston, a piston cod sealing element (62) disposed at one end of the cylinder (21) so as to extend around the piston rod (42) and pointing toward the piston rod head (43), piston sealing elements (71, 72) disposed on the piston and defining in the cylinder, a displacement space (15) at one side of the piston (51) and a compensation chamber (16) at the opposite side of the piston, wherein, by a pressure in the displacement space (15) and a vacuum in the compensation chamber (16), a force acting on the piston (51) is established in opposition to a stroke movement of the piston (51), with a leakage flow between the displacement space (15) and the compensation chamber (16) being permitted depending on the stroke direction of the piston, so that, during an initial pressure built up in the displacement space (15) and a vacuum build-up in the compensation chamber (16), the compensation chamber (16) is hermetically isolated from the displacement space (15), said deceleration device (10) including further a pneumatic connection (18) providing in an end position of the piston, in which the displacement space (15) is largest, for a blockable communication path (18) of the displacement space (15) and of the compensation chamber (16) with the ambient and, with the communication path (18) being blocked upon movement of the piston rod (42) with the piston (51) into the cylinder (21), the compensation chamber (16) being sealed into the cylinder (21), the compensation chamber (16) being sealed for generating the vacuum in the compensation chamber (16). |
