Glow plug and process for its manufacture
AssigneeBeru AG
InventorsMax Endler, Martin Allgaier, Michael Haussner, Heinz-Georg Schmitz, Ulf Wyrwich, Reinhold Grebe, Hans-Peter Kasimirski, Martin Eller
Life of this patent
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Abstract
A glow plug including a heating rod having a plug body composed of an electrically insulating plastic material, an inner pole connected to heating elements, and optionally, control elements, and an outer pole which is electrically insulated from adjoining components of the plug body by an insulative material provided between an inner and outer support tube, the inner support tube surrounding the heating rod while the plug body surrounds the outer support tube.
Claims7
Glow plug with a heating rod, having an inner pole and having an outer pole each of which is connected to a terminal lead, the outer pole being the wall of the heating rod which is electrically insulated from the adjacent components of the plug body, characterized in that the electrical insulation in a force fit area between the plug body and the heating rod is made in the form of a thin ceramic coating on the heating rod or on the interior wall of a hole of the plug body adjoining the heating rod.
Dependencies are inferred from the claim text.