| 摘要 |
A radiator cap is provided to smoothly circulate the cooling water or the air through a cooling water hole of a stop ring formed the upper part of a negative pressure valve. The radiator cap is composed of a pressure valve(20) opening and closing a cooling water inlet(42) according to the internal temperature change of a radiator, a negative pressure valve(30) opening and closing the flow channel connected with a through-hole(44) formed in the side of the cooling water inlet, a radiator cap detachably combined to the cooling water inlet, and a stop ring(32) formed at the upper part of the negative pressure valve. |
