HERMETIC ROTARY PUMP Russian patent published in 1995 - IPC

FIELD: handling liquids of various viscosity and density at low output and high back pressure. SUBSTANCE: rotor with radial grooves is located in housing provided with suction and delivery passages and positive displacement chamber. Roller contactors are movably located in grooves for rolling over inner surface of housing. Coupling for connecting the electric drive with rotor is made in form of inner drive magnetic ring and outer driven magnetic ring located concentrically and separated by magnetopermeable sealing sleeve. Driven ring consists of separate magnets located in rotor on its inner diameter between adjacent grooves. Contactors are made of magnetically soft material. EFFECT: enhanced reliability. 2 cl, 2 dwg