The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 2005
Filed:
Apr. 26, 2002
Raymond Kirsch, Java Center, NY (US);
Raymond Kirsch, Java Center, NY (US);
Derrick Manufacturing Corporation, Buffalo, NY (US);
Abstract
A method and apparatus for centrifuging. The apparatus comprises a centrifuge for centrifuging a slurry, including a bowl driven by a bowl drive motor, a screw conveyor driven by a screw conveyor drive motor, a pump driven by a pump motor, a bowl drive unit operatively arranged to drive the bowl drive motor, a conveyor drive unit operatively arranged to drive the screw conveyor drive motor, a pump drive unit operatively arranged to drive the pump drive motor; and, a general purpose first computer specially programmed to control the bowl drive unit to drive the bowl drive motor at a first constant speed and to control the screw conveyor drive unit to drive the screw conveyor drive motor at a second constant speed and to monitor the torques of the bowl drive motor and the screw conveyor drive motor, while simultaneously controlling the pump drive unit to variably control flow of the slurry through the centrifuge in response to variations in developed torque of whichever of the bowl motor or screw conveyor motor which is operating closest to its rated torque. The method comprises steps to monitor torques of the bowl and conveyor motors, which are operating at constant speeds, and controlling the pump motor to regulate flow based upon the monitored torques.