Simplified low insertion force sealing device capable of self restraint and joint deflection

Abstract

A conduit coupling system, sealing device, bell, and method of use are disclosed herein. The system comprises at least two piping components, and a sealing device. A first component has a bell and a second component has a spigot, the spigot is adapted to mate with the bell. The bell comprises a first end and a second end, the first end coupled to the first component. The bell has a concave annular inner surface and a diameter of the annular inner surface adjacent to the first end of the bell is greater than a diameter of the annular inner surface adjacent to the second end of the bell. The sealing device comprises a locking segment comprising a convex outer surface and a K-type gasket coupled to a locking segment or a non-restraining anti-extrusion segment. The sealing device is adapted to fit between the bell and the spigot.

1 . A sealing device; comprising:
 at least one rigid segment comprising a convex outer surface; and   a K-type gasket coupled to the at least one rigid segment.   
     
     
         2 . The sealing device of  claim 1 , wherein the at least one rigid segment is a locking segment. 
     
     
         3 . The sealing device of  claim 2 , wherein the at least one locking segment has at least one engagement device. 
     
     
         4 . The sealing device of  claim 1 , wherein the at least one rigid segment is an anti-extrusion segment. 
     
     
         5 . The sealing device of  claim 1 , wherein the at least one rigid segment is of a first material and the K-type gasket is of a second material. 
     
     
         6 . The sealing device of  claim 1 , wherein the K-type gasket is comprised of a coupling section and a sealing section. 
     
     
         7 . The sealing device of  claim 6 , wherein the coupling section has one or more expansion or contraction grooves. 
     
     
         8 . The sealing device of  claim 6 , wherein the sealing section is comprised of an upper section and a lower section each extending from the coupling section. 
     
     
         9 . The sealing device of  claim 1 , wherein the sealing device is annular. 
     
     
         10 . The sealing device of  claim 1 , wherein the outer surface is adapted to engage a concave inner surface in a conduit bell.