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. 13, 1999
Filed:
Aug. 28, 1997
Atsushi Kurano, Kuwana, JP;
Denso Corporation, , JP;
Abstract
A glow plug includes a housing. A main body is at least partially disposed in the housing. The main body is supported with respect to the housing. An insulating member is included in the main body. A heating member is provided in the insulating member. A pair of lead wires are electrically connected to two ends of the heating member respectively. The lead wires extend out of the insulating member. At least one ion sensing electrode is provided in the insulating member. The ion sensing electrode is electrically connected to the heating member. The ion sensing electrode is operative for detecting a condition of ionization in a flame. The ion sensing electrode has a tip uncovered from the insulating member so as to be exposed to the flame. The heating member has a given portion extending between a center with respect to the electrical connection with the ion sensing electrode and an end of the heating member which is a negative side when a heating dc current is driven through the heating member. An electric resistance of the given portion of the heating member is smaller than an electric resistance of the ion sensing electrode between its tip and the electrical connection with the heating member.