Roof vent and method of making same
US4625630A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1984 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Aug 27, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/46
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A nestable roof vent for use on the roofs of grain bins and other structures where circulation of air within the structure is required. The vent includes a bird screen sized to extend across the interior of the vent housing that is secured to a flange over the opening in the bin roof so as to be free from binding contact with the vent housing. Accordingly, should the screen become clogged with husks or leaves, the screen will bend about the flange to release any pressure build-up before structural damage to the structure can occur. A locking seam, capable of being made along the curved edge of a piece of sheet metal, is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.