Method of manufacturing a seal and restraining system
AssigneeS & B Technical Products, Inc.
InventorsJim Jones, Bradford G. Corbett, Jr., Gerardo Darce, Randall Chinchilla
Life of this patent
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Abstract
A method and apparatus for restraining pipe against both internal and external forces at a pipe or fitting connection and to join and seal at least two pipes to form a pipeline is shown featuring an improved restraining and sealing mechanism. The restraining and sealing mechanism includes a circumferential housing and a companion sealing ring which are received within a mating groove provided in the belled end of a female pipe. The circumferential housing has an interior region which contains a gripping ring insert. The sealing ring and housing are integrally located within a belled pipe end during belling operations.
Claims11
A method of manufacturing a seal and restraining system for joining and sealing a male plastic pipe to a mating female belled pipe end, the method comprising the steps of:
- providing a forming mandrel having an inner end and an outer end and having an outer working surface;
- locating a sealing ring and a companion ring shaped housing at a first circumferential position on the outer working surface of the mandrel, the ring shaped housing having a circumferential interior region;
- forming a belled pipe end about the sealing ring and companion ring shaped housing;
- and
- wherein a ring shaped gripping insert is installed in the circumferential interior region of the housing, the gripping insert having an interior gripping surface with at least one row of gripping teeth for engaging an exterior surface of the male plastic pipe.
Dependencies are inferred from the claim text.