Magnetic coupler for hemostatic rotor sealing

A medical device for placement within a heart of a patient, the medical device comprising:

• a housing including an inlet for receiving blood flow and an outlet for delivering blood flow;
• a fluid barrier disposed within the housing, the fluid barrier including a round opening, and the fluid barrier being impervious to fluid and separating the housing into a first section containing the inlet and the outlet, and a second section;
• an impeller shaft disposed within the first section of the housing;
• an impeller disposed within the first section of the housing and coupled to the impeller shaft;
• a first magnet disposed in the first section of the housing and coupled to the impeller shaft;
• a drive shaft disposed within the second section of the housing;
• a second magnet disposed within the second section of the housing, the second magnet being rotatably coupled to and translatable along the drive shaft, the second magnet including a non-round opening;
• and
• a pivot member disposed between the second magnet and the fluid barrier, the pivot member having a non-round proximal protrusion engaging the non-round opening of the second magnet such that rotation of the drive shaft and the second magnet relative to the housing causes rotation of the pivot member relative to the housing, and the pivot member further including a round distal protrusion engaging the round opening of the fluid barrier such that the pivot member is rotatable against the fluid barrier;
• wherein rotation of the drive shaft and the second magnet relative to the housing causes the first magnet, the impeller shaft, and the impeller to rotate relative to the housing.