Restrained pipe joining system for plastic pipe

Details Restrained pipe joining system for plastic pipe Restrained pipe joining system for plastic pipe

2007-12-17

2010-12-07

Hewitt, James M (Department: 3679)

Pipe joints or couplings

Essential catch

Resilient ring

C285S305000, C285S379000

Reexamination Certificate

active

07845686

ABSTRACT:
A restrained pipe joining system is shown comprising male and female ends each having aligned circumferential grooves which form a canal for passage of a locking key strap. During manufacture, the female belled end is sequentially formed over a Rieber style gasket and then over a ring shaped casing member having an inner circumferential groove formed on its inner circumferential surface. Preferably, the ring shaped casing has circumferentially spaced teeth that act as a pipe stop in cooperation with an outer circumferential groove on the male spigot to index the pipes to be coupled.

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“Certa-Lok” PVC Well Casing, CertainTeed PVC Well Products, copyright 2005.

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