Patent ID: 7662084
Filing Date: 2010-02-16
Classification: A61M,F04B

Abstract:
1. A blood pump actuator to generate a driving force for driving a blood pump, the blood pump actuator a motor unit having a stator and a rotor, and rotating to generate a rotating force; a cam unit to convert the rotating motion of the motor unit into a rectilinear reciprocating motion, wherein the cam unit comprises a cylindrical cam which encircles the motor and rotates around the motor, said cylindrical cam having a cam surface which varies in axial position around the cylindrical cam; and a bellows unit comprising a bellows, which is expandable and contractible and contains a non-blood fluid therein, and an upper bellows plate and a lower bellows plate respectively attached to the upper and lower ends of the bellows and a lower bellows extension part extending below the lower bellows plate in a location outside the motor, wherein the lower bellows extension part and the lower bellows plate move upwards and downwards in a vertical direction according to the rectilinear reciprocating motion of the lower bellows extension part and the lower bellows plate; the lower bellows extension part follows the cam surface of the cylindrical cam as the cam rotates around the motor; and the bellows repeatedly expands and contracts according to the vertical movement of the lower bellows plate, and provides a non-blood fluidic pressure output to drive the blood pump and the non-blood fluid causes blood in the blood pump to be pumped.