Patent ID: 6378717
Filing Date: 2002-04-30
Classification: F01P,Y10S

Abstract:
A closure cap to be fitted in place by one of screwing, plugging and rotating, on a fixed connector comprising one of a motor vehicle radiator and a compensator reservoir for cooling or heating systems, the fixed connector having a neck portion defining an interior surface, the closure cap comprising:a cap defining a center axis of said closure cap; an actuating element rotatable with respect to said cap; a valve mounted within said actuating element and arranged concentrically with said cap and said actuating element and rotatably moveable relative thereto, said valve including a sealing element for sealing contact with the interior surface of the neck portion on the closure cap as attached to the fixed connector portion; and a temperature-dependent control element for securing said cap against removal by rotation from the fixed connector at high temperature and permitting rotation of said cap from said fixed connector at normal temperature, said temperature-dependent control element having a control bolt movable substantially axially relative to the center axis of said cap, a collar operatively associated with said control bolt, and a memory spring having ends which engages said collar at one end, with said ends opposed, wherein said temperature-dependent control element is located in one of said cap and said cap and actuating element.