Duct-shaping machine and method
US4571980A · kind A · utility
9Cited by
10References
22Claims
0Family size
Inventor
Key dates
| Filing date | Oct 21, 1983 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Oct 21, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C37/155
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A duct-shaping machine having a pair of major-axis duct-shaping modules for elongating the cross section of a cylindrical duct as they are forced apart, a minor-axis compaction assembly having first and second compactors pressing inwardly towards the center line between the modules to flatten the sides of the duct.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.