ELECTROMAGNETIC PUMP Russian patent published in 1996 - IPC

FIELD: pump engineering. SUBSTANCE: pump has housing with cylinder and piston with rod installed in cylinder to from operating chamber. Piston and rod are rigidly coupled with core made in form of set of plates. Core is placed inside inductance coil connected to supply source and to two switches with pushers. Inclined recess is made on core at side of switch. Switches are connected in parallel. Switch pushers are arranged for contact with core recess. Switch installed at end of core idle stroke has additional inductance coil connected in parallel with main coil. EFFECT: enlarged operating capabilities. 3 cl, 4 dwg