Abstract: Pipe with socket end provided with an annular groove chamber containing a sealing ring supported by a support ring, which support ring compresses the sealing ring less than the final inserted spigot end. The support ring closes the groove and the sealing ring or the closed space is provided with lubricant.
February 24, 1981
Date of Patent:
December 7, 1982
Bernhard Lodder, Jan P. van Dongeren, Gerard A. E. Blok