Regulating Valve for Magnetic Materials

Author:  Van Fossen
Source:  US Patent 3,626,964
Doc ID:  1970016
Year of Publication:  1970
Abstract:  
A valve for regulating the flow of materials which are made up of a substantial portion of magnetic particles, the valve being characterized by improved flow rate control means. The valve includes an outer member and an asssembly consisting of a permananent magnet and an electrical coil, this assembly provided by spaces defined between the core member and the interior wall of the outer member. Means are provided for energizing the coil and for varying the input to the coil to vary the influence of the magnet on the particles and thereby regulate the flow of the material through the valve. The spaces defined between minimum and maximum dimensions, and the energizaion of the electrical coil is contolled whereby the flow rate can be suitably maintained at desired levels and readily changed between different flow rates.