Passive Roof Vent Structure for Moisture Deflection
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Solution Overview
Problem
Existing passive roof vent designs fail to effectively prevent moisture, including condensation and precipitation, from entering building enclosures, leading to damage and health issues due to design flaws that allow water to bypass the venting system.
Innovation Solution
A passive roof vent design featuring a cover with moisture-directing ribs and a slanted side wall, along with moisture deflecting features on the base, to guide moisture away from the aperture and prevent entry into the building enclosure, combined with a secure attachment system to ensure proper installation and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If prior art passive venting devices use a simple base with aperture and cover design, then manufacturing is simple and cost-effective, but moisture from heavy rain, snow melt, and roof splash can enter the enclosure through the aperture
Solution Approach 1:
The venting device is divided into multiple functional segments: a base with aperture, a cover member, and integrated moisture deflecting features (upstanding portions and peaks) that are spatially separated to perform different moisture deflection functions. This segmentation allows each component to address specific moisture entry paths without requiring complete redesign of the entire structure.
Solution Approach 2:
The invention adds vertical dimensionality to the traditionally flat base and cover design by incorporating upstanding portions and peaks that extend upward from the base surface. These three-dimensional features create additional protective barriers against moisture without significantly increasing overall device complexity, as they are integrated into the existing base and cover geometry.
2Reliability
If the vent aperture is positioned centrally under the cover, then the design is simple and symmetric, but moisture can easily flow directly into the aperture from roof splash and heavy rain
Solution Approach 1:
The invention deliberately positions the aperture asymmetrically relative to the cover, specifically locating it away from the center toward a position where upstanding portions and peaks provide maximum moisture deflection. This asymmetric positioning optimizes the aperture's protection from moisture while maintaining a relatively simple overall device structure, as it only requires adjusting the aperture location rather than redesigning entire components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively directs moisture away from the vent aperture, reducing moisture entry into the building, enhancing durability and preventing mold and mildew growth, while maintaining efficient ventilation and easy installation.
Implementation Method 1
moisture adhered to said underside surface of said cover moves, under the influence of gravity, to said moisture directing means and said moisture directing means directs said moisture therealong to fall onto said base outside of said aperture
Data Source
AI summary
A vent for a building has a cover attached to a base. The base has an aperture permitting gas to pass. A moisture directing means on an underside of the cover directs moisture move under the influence of gravity to fall outside of the aperture. The cover may include a slanted side wall portion, with the aperture positioned with its center displaced from the center of the cover toward the slanted side. The base may include a pair of moisture deflecting features along at least a portion of one of the nonslope sides to prevent moisture flowing along the base from within an area on the base covered by the cover to outside of the covered area at the nonslope sides. The base may also include a water deflecting ridge on its underside positioned between a downslope edge and the aperture to deflect water away.