MAGNETISCHES AUTOMATISCHES ABSPERRVENTIL

摘要

A magnetic automatic stop valve formed in a container of a medical fluid administration system has one magnetic element located in a float and another magnetic element located proximate a valve seat. As the fluid level in the container decreases, the magnetic field established between the float and the valve seat eventually overcomes the buoyancy of the float in the fluid and attracts the float into the valve seat at which position the flow of fluid from the container is stopped. The float is formed of two identical halves each of which has one half of an internal post. When joined together to make the float, the internal post is fully formed and extends from one end of the float to the other. One magnetic element is slid over the post during manufacture and is free to slide from one end of the float to the other. Due to the symmetrical nature of the float and the freedom of movement of the internal magnetic element on the post, the float may be inserted into the fluid container without regard to which direction it faces thus lowering manufacturing costs. Flow seals are provided to completely shut off flow when the float is seated.