Patent ID: 7176414
Filing Date: 2007-02-13
Classification: F23Q

Abstract:
1. A glow plug comprising: a body having a threaded portion for affixing the glow plug to an engine block, said body having an outer shell surrounding an inner cavity, said outer shell having a reduced portion at a top end of the outer shell, a center hexagonal portion having six faces, and the threaded portion extending downwardly from an engine block contactable base located at a bottom end of said hexagonal portion so that when said body is affixed to an engine block, the engine block contactable base contacts the engine block and forms a seal therewith, said engine block contactable base being formed in a horizontal plane when said plug is vertically oriented, and said hexagonal portion extending from the reduced portion to the threaded portion; and a circumferential groove formed horizontally in said outer shell in said hexagonal portion thereof and said circumferential groove extending completely across all six faces of said hexagonal portion and said hexagonal portion extending downwardly to terminate in contact with said engine block contactable base whereby the external shape of said base is hexagonal.