Patent ID: 8823251

Claim:
A spark plug, comprising: a metallic shell housing having a terminal end surface; an insulator disposed within said shell housing and having an end portion protruding from said terminal end surface; a center electrode disposed within said insulator and having a tip portion protruding from said end portion of said insulator; a shroud extending from said shell housing and configured to partially surround said insulator, said shroud having an end surface interconnected to said terminal end surface of said shell housing by a pair of laterally-spaced edge surfaces; and a ground electrode having a first end portion joined to said end surface of said shroud and a second end portion extending transversely relative to said first end portion so as to be facing and aligned with said tip portion of said center electrode; wherein said shell housing has a cylindrical lower portion defining its terminal end surface, and wherein said shroud is a circular semi-cylindrical extension of said cylindrical lower portion of said shell housing and which extends downward from said terminal end surface of said shell housing.