Joining mechanism for PVC pipe
US6918618B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 2003 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Mar 23, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L25/08
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a PVC-pipe, axially-tensioned joint. The pipe joint comprises a first PVC pipe having a spigot end, wherein the spigot end has a circumferential groove in and circumferentially around the outer surface of the spigot end. An inner ring is fitted into the groove in the spigot end and has a radial edge which forms a substantially radial shoulder circumferentially around the inner ring. The pipe joint also comprises a second PVC pipe having a bell end, wherein a plurality of angularly-spaced-apart holes extend radially through the bell end. The bell end of the second PVC pipe is fitted onto the spigot end of the first PVC pipe. There is a set of radial fasteners, wherein each given one of the radial fasteners extends through one of the plurality of angularly-spaced-apart holes in the bell end such that a first end portion of the fastener abuts against a shoulder of the inner ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.