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.:

US 7447449 B1

PDF
Full Text
Expired
Date of Patent:
Nov. 04, 2008

Filed:

Jun. 20, 2006
Applicants:

Michael Quoc LU, Fairport, NY (US);

Robert Bruce Anderson, Jr., Syracuse, NY (US);

William H. Wayman, Ontario, NY (US);

Inventors:

Michael Quoc Lu, Fairport, NY (US);

Robert Bruce Anderson, Jr., Syracuse, NY (US);

William H. Wayman, Ontario, NY (US);

Assignee:

Xerox Corporation, Norwalk, CT (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 21/00 (2006.01); G03G 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A method for detecting a stress condition in a cleaning system of an imaging device is provided. The method comprises receiving a pulse-width modulated (PWM) signal. The PWM signal has a duty cycle for driving a PWM servo motor of a cleaning system. A determination is then made whether the duty cycle of the PWM signal indicates that the servo motor is working within design limits. If the duty cycle is within design limits, characteristic adjustments of the duty cycle of the PWM are detected that indicate an occurrence of a non-catastrophic stress condition in the cleaning system. Once a characteristic adjustment of the duty cycle is detected, an alert signal is generated.


Find Patent Forward Citations

Lu, Michael. (2008). Cleaner subsystem fault detection (U.S. Patent No. 7447449). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7447449

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