Static structures (e.g. – buildings) – Wall – ceiling – floor – or roof designed for ventilation or... – Embedded flashing
Reexamination Certificate
2000-11-27
2001-10-30
Stephan, Beth A. (Department: 3635)
Static structures (e.g., buildings)
Wall, ceiling, floor, or roof designed for ventilation or...
Embedded flashing
C052S219000, C052S211000, C052S058000, C052S220800, C052S094000
Reexamination Certificate
active
06308480
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates in general to the maintenance of ceiling tiles and in particular to the preventive maintenance of ceiling tiles adjacent a ventilation duct vent by the use of a dust guard for directing air flow out of the vent into a room so that static electricity doesn't attract particles in the air flow onto the ceiling adjacent the ventilation duct vent.
2. Description of Related Art
Buildings that have a suspended ceiling generally have a prevailing maintenance problem in keeping the ceiling tiles clean especially in areas adjacent the ventilation duct vents. The problem exists because duct vents generally direct air into a room in a manner that allows static electricity to attract particles in the air flow onto the ceiling adjacent the vents resulting in dust particle residue and staining to build up on the ceiling. Ceiling cleaning procedures generally require the use of chemicals and is expensive.
The periodic changing of air filters is also a temporary solution since as soon as filters become loaded with dust the maintenance problem resumes and particles in the air flow out of the duct vent quickly attract onto the ceiling adjacent the duct vents.
I have discovered a way to maintain ceiling tiles clean in particular the ceiling tiles adjacent a ventilation duct vent by the use of a dust guard device. The dust guard device works by providing a peripheral wall substantially perpendicular to and projecting away from the duct vent into a room for directing air into the room so that static electricity doesn't attract particles in the air flow onto the ceiling tiles adjacent the duct vent.
SUMMARY OF THE INVENTION
The present invention is directed to a dust guard for installation on a room ventilation duct vent. The duct vent defining a plane parallel to the ceiling and providing a direction of air flow out of the vent into the room. The dust guard adjacent the duct vent providing a peripheral wall substantially perpendicular to and projecting away from the duct vent into the room directing air into the room so that static electricity doesn't attract particles in the air flow onto the ceiling tiles adjacent the duct vent. The dust guard comprising in combination, a room having a wall with the wall comprising a ceiling, a ventilation duct vent, and rails in the ceiling;
In combination, the duct vent comprising first and second parallel rails in the ceiling and third and fourth parallel rails in the ceiling perpendicular to the first and second rails; the first, second, third, and fourth rails supporting the vent housing; and the dust guard being captivated between, the vent housing and the first, second, third, and fourth rails wherein the dust guard is held in place by the weight of the vent housing.
The dust guard further comprising in combination, a first element captivated between the vent housing and the rails in the ceiling, the peripheral wall being supported by the first element and the first element comprising a panel perpendicular to the peripheral wall. The duct vent having first and second parallel sides and third and fourth parallel sides perpendicular to the first and second sides, and the dust guard further comprising a first member having a first section lying along the first side of the duct vent and a second section attached to and perpendicular to the first section lying along the third side of the duct vent and a second member having a third section lying along the second side of the duct vent and a fourth section attached to and perpendicular to the third section lying along the fourth side of the duct vent.
REFERENCES:
patent: 5687514 (1997-11-01), Gillispie
Dorsey Dennis L.
Stephan Beth A.
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