| 摘要 |
The invention relates to an evacuation pump 1 for the pressure side of a main pump intended for liquid transport, with a pump cylinder 3 with a piston 6, an inlet 10 in a first end wall 4, a seal 18 on that side of the piston 6 facing towards the first end wall 4, an outlet 9 in a second end wall 5, an operating member 7, 8 connected to the piston 6, and a lock member 16, 17 for locking the piston 6 with the seal 18 bearing sealingly against and blocking the inlet 10, the locking member 16, 17 being arranged on the opposite sides of the piston 6 and the first end wall 4 for locking the piston 6 at the first end wall 4, the locking member 16, 17 consisting of a locking segment, arranged on the first end wall 4, with a number of locking heels 19, and a gripping member 17 on the piston 6 consisting of a number of gripping hooks 17, and the piston 6 being rotatable, by means of operating member 7, 8, between two rotational positions, the gripping hooks 17 being capable of, in the first rotational position, being guided down past the locking heels 19 and, in the second rotational position, being inserted under the locking heels 19. <IMAGE> |
