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    Rooftop vent for reducing pressure under a membrane roof

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    7607974.pdf (553.6Kb)
    Downloads: 142
    Publication Date
    2009-10-27
    Filing Date
    2005-07-11
    Inventor
    Telionis, Demetri P.
    Jones, James R.
    Vlachos, Pavlos
    Grant, Elizabeth J.
    Rullan, Jose
    Johnson, Charles S.
    Metadata
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    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.
    Assignee
    Virginia Tech Intellectual Properties, Inc.
    Patent Number
    7607974
    Application Number
    11177492
    Source URL
    http://pimg-fpiw.uspto.gov/fdd/74/079/076/0.pdf
    Primary/U.S. Class
    454/364
    Other/U.S. Class
    454/365
    52/199
    CPC Class
    E04D5/14
    E04D13/17
    Patent Type
    utility
    URI
    http://hdl.handle.net/10919/72621
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    • Virginia Tech Patents [688]

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