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:
Jul. 27, 2010
Filed:
May. 12, 2005
Brent Chian, Plymouth, MN (US);
Peter M. Anderson, Minneapolis, MN (US);
Timothy J. Nordberg, Plymouth, MN (US);
Bruce Hill, Roseville, MN (US);
Brent Chian, Plymouth, MN (US);
Peter M. Anderson, Minneapolis, MN (US);
Timothy J. Nordberg, Plymouth, MN (US);
Bruce Hill, Roseville, MN (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
A low cost flame sensing system having at last one floating point. For instance, the system may have two grounds. There may be a flame sensing rod for detecting a flame which has a model circuit which appears upon the existence of the flame proximate to the sensing rod. The sensing rod may function without an explicit or dedicated excitation source connected to it. There may be diagnostics in the system for detecting leakage or shorts of the sensing rod to ground. Also, the system may have AC grounding phase detection.