Patent ID: 7222742

Claim:
A cap structure for a radiator used in a vehicle comprising: a main cap body including a metallic cap body and a non-metallic heat-isolation covering body, said metallic cap body having a center hole and two symmetrical holes at two opposite ends, said non-metallic heat-isolation covering body having a center hole, a bottom of said non-metallic heat-isolation covering body being formed with a recess, said recess being provided with two screw holes aligned with said holes of said metallic cap body, a top of said metallic cap body being configured to fit into said recess, said non-metallic heat-isolation covering body being provided with slip-proof teeth; a sleeve fitted in said center hole of said non-metallic heat-isolation covering body; two screws extending through said holes of said metallic cap body to engage with said screw holes of said non-metallic heat-isolation covering body; a connector shaft having a center through hole and an intermediate portion provided with a flange, said connector shaft having a threaded lower end; a circular leak-seal plate having a top provided with a protruded seat, said protruded seat having a center through hole, an upper portion of said center through hole being larger than a lower portion of said center through hole, said upper portion being threaded to engage with said threaded lower end of said connector shaft, a bottom portion of said circular leak-seal plate having a recessed seat; a leak-seal pad engaged with said recessed seat; and a spring fitted between said circular leak-seal plate and said metallic cap body.