Method of forming pipe spigot ridge
US6016948A · kind A · utility
3Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1997 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | Mar 31, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K33/006
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming a ridge around the outer circumference of a spigot formed at an end of a pipe. A ring having a certain wall thickness in its radial direction and formed with a peripheral groove on its outer circumference is placed around the outer circumference of the spigot. Then molten metal is poured into the peripheral groove, so that the bottom of the peripheral groove and the surface of the spigot are melted, thus joining the ring and spigot together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.