Patent ID: 6945156

Claim:
A device for displacing and locking movable switch parts ( 1 ), comprising a hydraulic piston which is formed by a rod ( 6 ), said rod cooperating by way of radially displaceable locking members ( 8 ), with an axially displaceable sleeve ( 5 ) adapted to receive the locking members ( 8 ), said displaceable sleeve ( 5 ) being coupled with the movable switch part ( 1 ), and a working cylinder for the rod ( 6 ) and the sleeve ( 5 ), said working cylinder being formed by an externally arranged tube ( 4 ) at least partially overlapping the sleeve ( 5 ) and the rod ( 6 ), wherein a bottom ( 19 ) of said working cylinder carries a hydraulic connection ( 11 ) running into the working cylinder on a sleeve end face that faces away from a coupling site for the movable switch part ( 1 ), and wherein a tappet ( 20 ) is mounted in an axially displaceable manner in said bottom ( 19 ), said tappet ( 20 ) capable of being displaced by an end face of said piston when said piston moves towards said bottom ( 19 ).