Pipe having an end portion, the inner wall of which is provided with a circumferential groove, in which a sealing means is mounted and a pipe joint consisting of this pipe and a spigot end of a second pipe inserted therein
US4230157A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1979 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Jan 31, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L47/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pipe having a sealing member (3) in an inner groove (2) at one pipe end (1). The sealing member provides a very effective seal relative to a spigot end (1a) of another pipe inserted in the pipe in question. The free ends of lip portions (6,7) of a sealing ring (4) (the cross section of which is of V-shape when undeformed) are provided with beads (8) so that behind a stiffening ring (5) surrounding said sealing ring (4) there is more volume of lip material than there is room for in the space confined by the adjacent part of the bottom of the groove (2), the exterior (1a') of said spigot end (1a), the rearmost sidewall (2') of the groove (2) and the stiffening ring (5). The pipe is preferably a plastic pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.