Split die for forming grooved workpiece
US7237424B2 · kind B2 · utility
10Cited by
9References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 15, 2003 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Aug 25, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K1/60
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming a radially expandable externally grooved tubular fastener from metal, comprising the steps of providing a suitable tubular blank (11) having a tubular wall (12) and squeezing the tubular wall between an internal member (17) with a surface which engages the internal tubular wall face (15) of the blank and a plurality of external members (18) provided with suitably shaped surfaces engaging the external tubular wall face (16) of the blank (11) thereby to form grooves (23) on the external tubular wall face (15) of the blank (11).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.