Ballast frames for maintaining flexible mesh screen vents unclogged
AssigneeWoodland Power Products, Inc.
InventorJames C Whitney
Life of this patent
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Abstract
A lightweight ballast frame with a metal rim spanned by one or more metal mullions is loosely anchored at several points to a flexible screen mesh covering a vent formed in an enclosure defining a collection chamber and providing an escape portal for the exhaust airstream which has deposited entrained debris in the chamber. The ballast frame resists outward ballooning of the flexible screen caused by the airstream, and promotes scavenging of debris adhering to the interior of the flexible screen.
Claims9
In a flexible mesh screen vent forming an escape path for pressurized exhaust air after it has delivered entrained debris and deposited it in a collection chamber, the improvement in combination with said flexible mesh screen vent comprising:
- A rigid ballast frame having a metal rim, metal mullions spanning said frame, and a plurality of fastenings loosely anchoring the frame in juxtaposition to said flexible mesh screen vent.
Dependencies are inferred from the claim text.