Centrifugal fluid pump apparatus

Details Centrifugal fluid pump apparatus Centrifugal fluid pump apparatus

2005-01-11

2005-01-11

Freay, Charles G. (Department: 3746)

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

By shaft speed or torque responsive means

C417S044110, C417S053000, C417S423120, C604S151000

Reexamination Certificate

active

06840735

ABSTRACT:
A centrifugal fluid pump apparatus includes a control mechanism; and a body5including a pump section having an impeller rotating inside a housing; a rotor having an impeller attraction magnet; a motor for rotating the rotor; an impeller attraction electromagnet for attracting the impeller thereto; an impeller-position detection sensor; and a groove for hydrodynamic bearing provided on an inner surface of the housing. The control mechanism has a position sensor output monitoring function or an electromagnet current monitoring function, a motor current monitoring function; and an emergency impeller rotation function. The impeller rotation function operates when the sensors or the electromagnet has a failure by using the position sensor output monitoring function or the electromagnet current monitoring function to rotate the impeller by utilizing the groove for hydrodynamic bearing.

REFERENCES:
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patent: 1 027 898 (2000-08-01), None
patent: 1 070 510 (2001-01-01), None

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