Patent ID: 7594489

Claim:
An extender for connecting a high voltage source to a spark plug comprising: a conductive rod having a first end and a second end, said first end suitable for electrical connection to the high voltage source, said second end suitable for electrical connection to the spark plug; a sleeve injection-molded over said conductive rod so as to be in void-free relation with an exterior surface of said conductive rod, said conductive rod having said first end extending outwardly therefrom, said sleeve defining a spark plug-receiving receptacle at said second end of the conductive rod, said sleeve having a narrow diameter portion adjacent said first end of said conductive rod, said narrow diameter portion having a notch extending therearound; and an O-ring received in said notch and extending therearound, said sleeve having an abutment ring formed on a side of said O-ring opposite said first end of said conductive rod, said abutment ring integrally formed with said sleeve, said abutment ring having a greater diameter than a diameter of said narrow diameter portion, said sleeve having a main section extending around said conductive rod from said abutment ring to said receptacle, said main section being a generally constant diameter less than the diameter of said abutment ring and greater than the diameter of said narrow diameter portion.