Patent ID: 7785247

Claim:
A physiologic pulsatile pump apparatus comprising: (a) a housing defining a chamber having an inlet port; (b) a disposable, compressible-expandable bladder sealably mounted within said housing, said bladder having a receiving port and a delivery port; (c) an hydraulic actuator connected to said housing, said the hydraulic actuator comprising: (i) a fluid chamber containing a pressure transmissive fluid, said fluid chamber having an outlet port in communication with said inlet port of said housing; and (ii) an actuating member mounted within said fluid chamber for movement within said fluid chamber in a manner to generate a pulsatile pressure on said transmissive fluid so as to cause a pulsatile pressure on said bladder to vary the volume thereof; and (d) a voice-coil motor operably associated with said hydraulic actuator for controllably moving said actuating member within said fluid chamber, said voice-coil motor including a reciprocally movable shaft having an extremity in communication with said actuating member of said hydraulic actuator for imparting movement to said actuating member.