| 摘要 |
The invention relates to a breast pump for pumping mother's milk, said pump comprising a cylindrical hollow piston provided with at least one outer peripheral recess on the lower end in relation to the cylindrical envelope surface of the hollow piston, a vacuum extractor which is connected to the upper end of the hollow piston by means of a fluid passage, a flexible compensation element arranged between the hollow piston and the abutment surface of the vacuum extractor, at least one peripheral sealing element consisting of a flexible material and inserted into the recess, and a cylinder having a closed lower end in which the hollow piston can move axially. The envelope surface of the hollow piston is guided on an inner wall of the cylinder, the sealing element is arranged between the inner wall of the cylinder and the hollow piston in a sealing manner, and at least the vacuum extractor is arranged outside the cylinder. ® KIPO & WIPO 2009 |
