Restrained joint having elastomer-backed locking segments
US5197768A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Oct 10, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L37/0925
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pipe joint and a locking member for use with the pipe joint are provided for a bell and spigot type joint, the locking member being a separate element disposed axially outwardly of a fluid seal gasket within the bell end of a first of the pipe elements, the locking member being made up of an elastomeric backing member and at least one locking segment, the elastomeric backing member being adapted to seat in a first annular recess in the bell end, and against a radially inwardly protruding shoulder, this seating position urging the outer surface of the locking segment into contact with the wall of the first annular recess, to effect a constant, positive wedging action against a spigot end of a second pipe element inserted into the bell end of the first pipe element. The locking member thus securely engages and retains the spigot end within the bell end against axial forces tending to separate the pipe elements, and the locking member serves as a dirt seal improving the prevention of dirt and other materials from entering the bell end of the joint which could adversely affect the integrity of the fluid seal or interfere with the ability to efficiently induce any desired joint deflec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.