Sealing cap

Abstract

The invention relates to a sealing cap for openings in motor vehicle radiators which is provided with a cap inner part ( ) having a flow connection between the interior of the container and the exterior of the container as well as a valve arrangement ( ) for unblocking and blocking the flow connection. The valve arrangement ( ) comprises a first ( ) and second ( ) valve body which can move between an unblocking position and a blocking position in a to-and-fro manner. The first valve body ( ) is prestressed in the direction toward the interior of the container and is supported in this direction on a first sealing seat ( ) located on the cap inner part ( ) and on a second sealing seat ( ) located on the second valve body ( ), said second sealing seat lying inside the first sealing seat ( ) in a radial manner. During unblocking of a fluid connection between the interior of the container and the exterior of the container, the first valve body can be respectively lifted from the cap inner part ( ) when a first limiting value of the container interior pressure is exceeded and can be lifted from the cap inner part ( ) and the second valve body ( ) when a safety limiting value of the container interior pressure is exceeded. The second valve body ( ) is configured as a structural component ( ) which extends perpendicular to the direction of movement of the valve body ( ). The structural component has an opening ( ) which lies inside the second sealing seat ( ) of the first valve body ( ) in a radial manner and which is fluid connected to the interior of the container. A third sealing seat ( ) provided on the cap inner part ( ) is assigned to said structural component outside the second sealing seat ( ) of the first valve body ( ) in a radial manner up-to the exterior of the container. The structural component lies on the third sealing seat at a third limiting value which is between the first and second limiting value for the container interior pressure, whereby the component blocks a previously existing flow connection between the interior of the container and the exterior of the container.