Method of forming a tubular member
US6447399B1 · kind B1 · utility
33Cited by
9References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K1/60
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming a tubular member with longitudinal slots along part of its wall, comprising the steps of: firstly, forming longitudinal zones of weakness along part of the wall of the tubular member, and secondly, expanding the said part of the tubular member radially to cause fracture of the wall of the member along the longitudinal zones, thereby to form longitudinal slots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.