Patent ID: 6398506
Filing Date: 2002-06-04
Classification: A61M,F04C,F04D

Abstract:
A centrifugal fluid pump assembly comprisinga centrifugal fluid pump comprising a centrifugal fluid pump section including a housing having a blood inlet port and a blood outlet port and an impeller having a first magnetic material and a second magnetic material disposed thereof and accommodated for rotation in the housing and without contacting the housing to feed a fluid by a centrifugal force developed during its rotation, an impeller rotational torque generating section including a rotor having a magnet for attracting the first magnetic material of the impeller and a motor for rotating the rotor, and an impeller position control section having an electromagnet for attracting the second magnetic material of the impeller, and a control device having an input portion for inputting a set number of rotations of the motor or an input portion for inputting a set motor-driving current value; and a function of limiting an input of a number of rotations of the motor more than a predetermined number of rotations or limiting an input of the motor-driving current having a value more than a predetermined value.