Pipe coupling

Abstract

The invention relates to a pipe coupling comprising a socket component and an insert component which is partially insertable to securely fit into the socket component. A ring groove between the socket component and the insert component is sealed by a ring seal. The socket component is releasably connected to the insert component by means of a union nut which contacts a shoulder of the insert component rearwardly for joined movement into the closed position. The union nut is screwed onto the socket component along a cylindrical and/or conical exterior thread. The ring gap between the union nut and the insert component is sealed. The ring gap between the union nut and the socket component is also sealed. The thread connection between the socket component and the union nut is positioned between the two sealing positions.

What is claimed is:  
     
         1 . A pipe coupling comprising a socket component and an insert component which is partially insertable to securely fit into the socket component, the socket component being releasably connected to the insert component by means of a union nut which contacts a shoulder of the insert component rearwardly for joined movement into the closed position, the ring groove between socket component and insert component being sealed by a ring seal, wherein the union nut is screwed onto the socket component along a cylindrical and/or conical exterior thread, the ring gap between the union nut and the insert component and the ring gap between the union nut and the socket component being sealed and the thread connection between the socket component and the union nut being positioned between the two sealing positions.  
     
     
         2 . A pipe coupling according to  claim 1 , wherein one of the sealing rings is inserted into a ring groove in the exterior circumferential surface of the ring segment of the insert component forming the shoulder and/or in the facing ring surface of the union nut, and a second sealing ring is inserted into a ring groove in the exterior circumferential surface at the rear terminal section behind the thread connection on the socket component and/or in the facing ring surface of the union nut.