Method of manufacturing a fluid conduit having exterior detail
US5022135A · kind A · utility
20Cited by
26References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1990 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Apr 12, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49805
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for fabricating metallic conduit and the like having exterior surface details such as beads, bulges and flares by inelastic flow of the metal of an extruded blank which does not exhibit the detail. The process comprises the steps of placing a blank in a high pressure die, injecting oil or other incompressible pressure-transmitting fluid into the blank, and using advancing core punches, pressurizing the fluid to cause the metal of the blank to flow into detail cavities of the die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.