Belt driven centrifugal separator with multi-stage, belt...

Electricity: motive power systems – With particular motor-driven load device – Power- or motion-transmitting mechanism

Reexamination Certificate

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Details

C318S565000, C388S924000, C210S085000, C494S010000, C494S084000

Reexamination Certificate

active

07372219

ABSTRACT:
In a centrifugal separator of the type in which driving power of a motor is transmitted to a rotor via a power transmission mechanism, such as a belt, a motor-rotation signal frequency fm and a rotor-rotation signal frequency fr are computed, on the basis of which a frequency ratio A (fr/fm) is computed. When the frequency ratio A exceeds the upper limit of a first predetermined range, a warning message is displayed to prompt the user to perform maintenance. When the frequency ratio A exceeds the upper limit of a second predetermined range, an alarm message is displayed and the motor is stopped.

REFERENCES:
patent: 3661266 (1972-05-01), Von Rotel
patent: 4822331 (1989-04-01), Taylor
patent: 4827197 (1989-05-01), Giebeler
patent: 5917688 (1999-06-01), Kido et al.
patent: 6589155 (2003-07-01), Dolecek
patent: 10-118529 (1998-05-01), None
patent: 2003-010734 (2003-01-01), None

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