Patent ID: 7385339
Filing Date: 2008-06-10
Classification: H01T,Y10T

Abstract:
1. An ignition device for an internal combustion engine, comprising: a housing; an insulator secured within said housing and having an exposed axial end at an opening in said housing; a center electrode mounted in said insulator and extending out of said insulator through said axial end, said center electrode having a firing end; a ground electrode mounted on said housing and terminating at a firing end that is located opposite said firing tip such that said firing end and said firing tip define a spark gap therebetween; and a first firing tip formed from a first reflowed noble metal powder paste or slurry preform which is metallurgically bonded to one of said center electrode and said ground electrode at its firing end, said firing tip completely covering said firing end and an upwardly convex bond interface between said firing tip and said firing end.