| 摘要 |
Needle for taking a perfusion liquid from a rigid bottle (10). The valve (15) comprises a cylindrical and hollow valve element (19) with a bottom (19b), located in a cylindrical casing (17). Against the cylinder there is provided an air inlet (20), which is sealed by means of a membrane (21) of elastic material. The valve element (19) is provided at the outer end thereof with a housing (22) for an air filter. the valve element (19), which allows a uniform taking of droplets, may be provided at low cost. The membrane (21) is very simple to manufacture with a close tolerance, thereby allowing a uniform quality of the valves, thus avoiding subsequent controls and operations. |
