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:
Apr. 08, 2014
Filed:
Mar. 23, 2011
Applicants:
Derek W. Jones, Galloway, GB;
Kevin M. Zomchek, Nashua, NH (US);
Richard Galera, Nashua, NH (US);
Inventors:
Assignee:
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H 47/00 (2006.01); H01H 47/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and system for diagnostic coverage of safety components monitors the state of a safety chain and each of the safety devices in the chain. A fault condition is detected if one of the safety devices indicates that the safety chain should be open but the safety chain indicates that it is closed. In order to prevent an inadvertent reset of the fault condition by opening the safety chain via a second safety device, the fault condition is latched until the monitoring system verifies that the faulty safety device has been corrected.