Sealing Lid for a Motor Vehicle Radiator

Abstract

A sealing lid for a fixed nozzle of a container, particularly a motor vehicle radiator having a covering outer part and a covering inner part. The covering outer part comprises a sealing element for a container nozzle and a grip element which can be rotated in relation thereto. A locking piston acts between the grip element and the sealing element of the outer part of the lid. The locking piston, which can be disengaged by applying prestress to a spring or is disengaged, can be engaged by means of a pressure-controlled drive in the form of a membrane. The drive is connected to a pressure-transmitting arrangement positioned in the inner part of the container. A valve arrangement which is used to release and close a flow connection between the inner part of the container and the outer part of the container comprises an axially moveable overpressure valve body which is pressed towards a sealing seat on the inside of the covering with pretension such that it can be lifted from the valve seat when a threshold value of the pressure inside the container is exceeded, and a lower pressure valve body can be activated accordingly and is arranged in a concentric manner on the lid axis, such that the pressure-transmitting arrangement is formed by axial pressure transmitting channels of the inside of the covering, which receives the valve arrangement.

1 - 10 . (canceled)  
   
   
       11 . A closure cap for a fixed neck of a container, in particular of a motor vehicle radiator, comprises: 
 an outer cap part, said outer cap part having both a closure element for the container neck and a grip element, rotatable relative to the container neck;    a torsion preventer;    a pressure-controlled drive in the form of a diaphragm;    an inner cap part, said inner cap part having a sealing seat;    a pressure-transmitting arrangement formed by axial pressure-transmitting conduits in the wall of said inner cap part, which wall receives said valve assembly; and    a valve assembly, said valve assembly for uncovering and blocking a fluidic communication between the container interior and the container exterior, wherein:    said torsion preventer being located between said grip element and said closure element, said torsion preventer being engaged via spring prestressing and disengaged via said pressure-controlled drive, and    said valve assembly has an axially movable overpressure valve body, which is pressed toward the container interior against said sealing seat with prestressing in such a way that if a limit value of the container interior pressure is exceeded, it can be lifted from said sealing seat, and an underpressure valve body disposed concentrically to a cap axis and correspondingly activatable.    
   
   
       12 . The closure cap as defined by  claim 11 , wherein: 
 said pressure-transmitting conduits are distributed uniformly over the circumference of the wall of said inner cap part.    
   
   
       13 . The closure cap as defined by  claim 11 , wherein: 
 said one-piece diaphragm on the outer circumference has an annular sealing edge, held in stationary fashion, and a centrally axially movable diaphragm plate, between which two diaphragm parts an annular bead is provided.    
   
   
       14 . The closure cap as defined by  claim 13 , wherein: 
 said sealing edge of said diaphragm is clamped in sealing fashion between an annular face end of said inner cap part and an annular edge of a diaphragm holder.    
   
   
       15 . The closure cap as defined by  claim 11 , wherein: 
 said inner orifice of the pressure-transmitting conduits is located diametrically opposite said annular bead.    
   
   
       16 . The closure cap as defined by  claim 11 , wherein: 
 said pressure-transmitting conduits are shaped conically, such that the smaller-diameter end forms said orifice toward the container interior.    
   
   
       17 . The closure cap as defined by  claim 11 , wherein: 
 said torsion preventer is formed by a cuplike element, between whose bottom and said diaphragm, on the one hand, a pressure disk is disposed, and between whose bottom and said grip element, on the other, a compression spring is disposed, and whose free edge is provided with coupling ribs, which are distributed over the circumference and point radially outward and which engage radial grooves of said grip element alone or of said grip element and the closure element of the outer cap part, depending on the axial position of the cuplike element.    
   
   
       18 . The closure cap as defined by  claim 17 , wherein: 
 said grip element is provided with an axially inward-protruding extension, which is engaged on the inside by the cuplike element.    
   
   
       19 . The closure cap as defined by  claim 11 , wherein: 
 the interior of said inner cap part, receiving said valve assembly, is covered by a fixed retaining plate.    
   
   
       20 . The closure cap as defined by  claim 11 , wherein: 
 said underpressure valve body is integrated axially centrally into said overpressure valve body.