Rooftop vent for reducing pressure under a membrane roof
US7607974B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2005 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Apr 9, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04D13/17
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Membrane roofs are susceptible to damage in high winds. Wind can lift a membrane roof from a building and cause it to tear or become damaged. The present roof vent prevents liftoff and damage by reducing the air pressure under the membrane during high winds. The present roof vent has two opposed convex domes separated by a gap. Wind blowing across the roof flows between the domes where it accelerates and creates a region of low pressure according to the Venturi effect. The lower dome has an opening at the gap so that the low pressure is applied to the space under the membrane roof. Therefore, when wind blows across the roof, the vent draws air from under the membrane and the membrane is pressed against the roof, preventing liftoff.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.