Ventilation – Having outlet airway – Having readliy movable air regulating louver – damper – or cover
Reexamination Certificate
2005-07-11
2009-10-27
McAllister, Steve (Department: 3749)
Ventilation
Having outlet airway
Having readliy movable air regulating louver, damper, or cover
C454S365000, C052S199000
Reexamination Certificate
active
07607974
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.
REFERENCES:
patent: 1122375 (1914-12-01), Engle
patent: 1122431 (1914-12-01), Sexton
patent: 2387708 (1945-10-01), Arnhym
patent: 3302552 (1967-02-01), Walsh
patent: 3347147 (1967-10-01), Howard
patent: 3509811 (1970-05-01), Topp
patent: 3685426 (1972-08-01), Rosa
patent: 3788207 (1974-01-01), Doherty, II
patent: 3817009 (1974-06-01), Elder
patent: 3893383 (1975-07-01), Jones
patent: 3984947 (1976-10-01), Patry
patent: 4016730 (1977-04-01), Devilliers
patent: 4162597 (1979-07-01), Kelly
patent: 4223486 (1980-09-01), Kelly
patent: 4512243 (1985-04-01), Ballard et al.
patent: 4538508 (1985-09-01), Ballard
patent: 4557081 (1985-12-01), Kelly
patent: 4593504 (1986-06-01), Bonnici et al.
patent: 4608792 (1986-09-01), Gerber
patent: 4641571 (1987-02-01), Anderson et al.
patent: 4652321 (1987-03-01), Greko
patent: 4803111 (1989-02-01), Mansell
patent: 4848653 (1989-07-01), Van Becelaere
patent: 4850166 (1989-07-01), Taylor
patent: 4876950 (1989-10-01), Rudeen
patent: 4888930 (1989-12-01), Kelly
patent: 4909135 (1990-03-01), Greko
patent: 4963761 (1990-10-01), Wight
patent: 5009149 (1991-04-01), MacLeod et al.
patent: 5734215 (1998-03-01), Taghezout et al.
patent: 5749780 (1998-05-01), Harder et al.
patent: 5766071 (1998-06-01), Kirkwood
patent: 6006482 (1999-12-01), Kelly
patent: 6325712 (2001-12-01), Lawless, III et al.
patent: 6484459 (2002-11-01), Platts
patent: 2005/0054281 (2005-03-01), Lin
Grant Elizabeth
Johnson Charles S.
Jones James R.
Rullan Jose
Telionis Demetri
Blank Rome LLP
Kosanovic Helena
McAllister Steve
Virginia Tech Intellectual Properties Inc.
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