Patent ID: 6810847
Filing Date: 2004-11-02
Classification: H01R,H01T

Abstract:
In an engine having a spark plug with an insulator including a terminal connected with an ignition wire and an elastomeric boot covering the insulator, the terminal and the adjacent ignition wire, a charge dissipative cover for protecting against corona and static charges comprising: a tubular sheath of woven fiberglass strands having an interior socket for receiving said insulator and said boot, said socket having a constricted mouth at a lower end for engaging said insulator and an open upper end for receiving said ignition wire; a coating system adhered to at least the outer surface of said sheath and comprising a first layer adhered to said outer surface and a second layer adhered to said first layer, said first layer comprising a silicone-based coating containing by weight of said first coat about 15 to 35 percent aluminum flake having a particle size establishing electrical conductivity in said first coat at a low break down voltage, said second layer including ceramic pigment in an amount providing thermal resistance for said sheath and a dielectric resistance for said second layer.