Magnetically suspended type pump

Details Magnetically suspended type pump Magnetically suspended type pump

1996-03-29

1998-03-10

Thorpe, Timothy

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

417 20, 417 42, 417 43, 417 441, 417 442, 417 443, 417 4411, 4174235, 41742312, 415 98, 4151735, 415900, F04B 4900

Patent

active

057253579

ABSTRACT:
In a magnetically suspended type pump, an operating state of the pump can be obtained without using a pressure gauge and a flowmeter. In addition, in the case where the magnetically suspended type pump is applied to a blood pump, in order to reduce the number of connections in a flow path and to avoid thrombus formation, a correlation between current flowing in a motor and flow or a correlation between current flowing in the motor and pressure is obtained in advance, and the speed of rotation of motor is varied by a speed of rotation control circuit in response to an instruction from a CPU circuit, based on the obtained correlation between current and flow or between current and pressure, whereby flow or pressure is controlled.

REFERENCES:
patent: 4613281 (1986-09-01), Lubieniecki
patent: 4678404 (1987-07-01), Lorett et al.
patent: 4732236 (1988-03-01), Jacques
patent: 4781525 (1988-11-01), Hubbard et al.
patent: 5163818 (1992-11-01), Betsill et al.
patent: 5240380 (1993-08-01), Mabe
patent: 5350283 (1994-09-01), Nakazeki et al.
patent: 5470208 (1995-11-01), Kletschka

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