Integral transverse flanges for a duct connecting system
US7234734B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2005 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | May 25, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L23/14
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An integral transverse flange for a duct includes a first upturned portion extending substantially perpendicularly from a duct wall of the duct. The flange further includes a second portion bent rearwardly from the first upturned portion, and a third return portion turned toward the duct wall and rounded back toward the first upturned portion from the second portion. A fourth L-shaped portion extends from the third return portion, the L-shaped portion having a first arm arranged adjacent to and in close relation with the second portion and a second arm arranged adjacent to and in close relation with the first upturned portion. A bead is formed in the first upturned portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.