Patent ID: 9041274
Filing Date: 2015-05-26
Classification: H01T

Abstract:
1. A spark plug, comprising: a shell having an axial bore; an insulator having an axial bore and being disposed at least partially within the axial bore of the shell; a center electrode disposed at least partially within the axial bore of the insulator; a ground electrode attached to the shell and having a free end surface; and a firing pad made of a precious metal material attached to the ground electrode with a weldment, the firing pad having a side surface at a peripheral edge (P) of the firing pad, wherein the free end surface of the ground electrode and the side surface of the firing pad are flush or nearly flush relative to each other, and the weldment is located inboard of the side surface of the firing pad along at least part of an extent where the free end surface of the ground electrode and the side surface of the firing pad are flush or nearly flush relative to each other.