Backward extrusion method and product
US5964117A · kind A · utility
18Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1997 |
| Grant date | Oct 12, 1999 |
| Priority date | — |
| Expiry date | May 30, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C33/004
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming a closed-end vessel by backward extrusion comprises providing an extrusion billet having a front surface with an axial recess and a body of an extrudable material positioned in the recess. Backward extrusion results in the formation of a closed-ended vessel, for example a pressurized gas cylinder, composed of the material of the extrusion billet with a weld bonded inner surface lining of the extrudable material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.