Pulsatile pump, e.g. for assisting human heart, has actuator with apertures, protrusions on side bounding on stator that corresponding to stator shape and engage stator

摘要

The pump has a stator (12) in a housing and an actuator (15) reciprocally movable wrt. the stator by electromagnetic and spring force between first and second positions, thus increasing and reducing a fluid chamber with induction and outflow openings. The actuator has apertures and protrusions on the side bounding on the stator that corresponding to the shape of the stator and that engage the stator.