Duct blank seam and apparatus for making a duct blank seam
US8950229B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 2013 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Sep 15, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12229
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A flanged duct blank has a male part defined by lead notches formed at each side of a leading end and has a female part defined by trail notches formed at each side of a trailing end. The male part includes a lock tab. The female part includes a leg part and a Z-bend. The Z-bend includes a leg part and a gap. The duct blank is repeatedly clamped and bent by a pivoting wiper to form a duct portion. The pivoting wiper includes a clench tool that has a retractable rib and a retractable roller. With the lock tab inserted into the Z-bend and the retractable rib engaged with the Z-bend, the retractable roller clenches the leg part over the lock tab to lock the male and female parts together in a duct seam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.