Cylindrical shell for use in gas cylinder fabrication
US6142001A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1999 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Jun 9, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C23/205
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of producing a cylindrical shell in which a billet of circular, transverse cross-section is provided with of first and second sections formed of steel and a liner insert material, respectively. The first section has an end portion and a recess defined within the end portion. The second section is shaped to nest within the recess of the end portion of the first section. The billet is extruded into a cylindrical shell by a billet piercing operation so that the first section produces an outer cylindrical form and the second section produces a liner insert for the cylindrical form. The recess and therefore the second section (forming the liner insert) can be a frustum of a cone. The material for the liner insert may be a corrosion resistant nickel or nickel alloy, Hastalloy C-22, tantalum, titanium, gold or platinum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.