Two-layer clad pipe
US6659137B2 · kind B2 · utility
7Cited by
11References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2001 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Sep 5, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49908
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An outer pipe 10 and an inner pipe 12 are formed by drawing. Inner pipe 12 is inserted into outer pipe 10 and a metal core 14 is inserted into inner pipe 12. From this state, drawing is performed so that outer pipe 10 presses tightly against inner pipe 12. Metal core 14 is pulled out, resulting in a two-layer clad pipe 15. Alternatively, a two-layer clad pipe can also be made by drawing outer pipe 10 and inner pipe 12 without inserting metal core 14.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.