PURPOSE: To prevent the slip noise and the occurrence of any breakages by rotating driving magnets by means of a driving electric motor and simultaneously rotating a plural number of driven magnets which constitute a rotating body performing a pumping action.
CONSTITUTION: Ring-shaped driving magnets 10a, 10b in which parts adjacent each other in circular direction at a predetermined distance are magnetized to reverse polarity respectively are internally fitted to the outer peripheries of a groove-disc-shaped magnetic holder 12, between these driving magnets 10a, 10b driven magnets 20 are rotatably supported in a non-contacting condition, and a rotating body which performs a pumping action is constituted by the same number of impellers 36 as the driven magnets 20. Any mechanical transmission mechanism is thereby not required, so the slip noise and the occurrence of any breakages in the transmission mechanism can be prevented.
JPS4899557A | 1973-12-17 | |||
JPS6236272B2 | 1987-08-06 |