Patent ID: 6342690
Filing Date: 2002-01-29
Classification: F23Q,Y10T

Abstract:
A glow plug construction for use in an internal combustion engine, said glow plug construction comprising:a first electrode being a plug body having an open upper end with an upper rim, said open upper end leading into a plug bore having a threaded portion adjacent said open upper end and a shelf portion below said threaded portion; a lower insulating support element positioned in said plug bore and seated on said shelf portion; a second electrode being a core body having a flange portion positioned in said plug bore and seated on said lower insulating support element, and a post portion connected to said flange portion and partially protruding through said open upper end; an upper insulating support element positioned in said plug bore and seated on said flange portion wherein said core body is spaced from and supported against said plug body by said upper and lower insulating support elements; heater means electrically connected to said first and second electrodes whereby heat is generated upon electricity passing therethrough; and a nut having an externally-threaded sidewall extending between a top surface and an opposing bottom surface, and a nut bore communicating between said top and bottom surfaces, the externally-threaded sidewall of said fastener threadedly engaged with the threaded portion of said plug bore with said post portion of said core body non-tactually extending through said nut bore, and said bottom surface abutting against said upper insulating support element, whereby said upper and lower insulating support elements and said flange portion of said core body are clamped between said bottom surface and said shelf portion, and wherein the upper rim of said plug body is crimped radially inward over the top surface of said nut.