Gutter Guard Screen Channels That Prevent Overflow Clogging
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Solution Overview
Problem
Existing gutter systems are prone to clogging due to debris accumulation, leading to overflow and ineffective water flow, as conventional filtration devices fail to adequately prevent debris from entering and blocking the gutter system.
Innovation Solution
A filtration device with a mesh having channels of varying wall heights, where the downstream wall is higher than the upstream wall, creating a porous dam to redirect water flow and prevent debris accumulation, while allowing water to pass through effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional filtration devices are used, then debris can be filtered out, but water flow becomes blocked during heavy rainfall due to pool formation
Solution Approach 1:
The patent applies asymmetry by creating channels with unequal wall heights, where the upstream wall is higher than the downstream wall. This asymmetric configuration prevents water from pooling across the entire channel width during heavy rainfall, allowing continuous water flow through the filtration device while maintaining debris filtration capability.
Solution Approach 2:
The patent introduces a vertical dimension variation within the channel structure by varying wall heights. This dimensional change creates multiple flow paths at different elevations, enabling water to bypass pooled areas by flowing over the lower downstream walls, thus maintaining productivity while preserving filtration reliability.
2Ease of manufacture
If channel walls are made of equal height, then manufacturing is simplified, but water pools form during heavy rainfall causing overflow
Solution Approach 1:
The patent deliberately introduces asymmetry in channel wall heights to solve the water pooling problem. While this increases manufacturing complexity compared to equal-height walls, it reliably prevents pool formation during heavy rainfall by creating a downward slope that facilitates continuous water discharge through the filtration device.
3Stability of the object's composition
If the screen surface is flat, then debris accumulation is uniform, but water flows too quickly over the surface during heavy rainfall
Solution Approach 1:
The patent adds vertical variation within the channel structures by implementing unequal wall heights. This dimensional modification creates retention zones where water slows down and pools locally, increasing contact time with the filtration screen for improved debris capture, while the overall asymmetric channel geometry prevents complete surface overflow during heavy rainfall.
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 solution effectively filters out debris and directs water flow downward, reducing clogging and ensuring efficient water drainage even during heavy rainfall by utilizing channels with unequal wall heights to manage water pressure and flow.
Implementation Method 1
stops the forward flow of water over the top of a pool of water existing in the channel by creating a porous dam (a portion of the downstream wall) against which forward flowing water will slow
Implementation Method 2
making the rear wall that frames a channel be of a greater height than its opposite (front, or downstream) wall creates a vertical flowing volume of water that presses on the rear (upstream) top surface of the pool of water existing in a channel, causing the pooled water to drop downward through the screen at that area of downward water pressure
Data Source
AI summary
A gutter guard for filtering water that enters a rain gutter on a building includes: a screen body configured to be positioned above a lowest portion of the rain gutter and having a plurality of openings that are penetrable by water. The screen body has a first surface, a second surface, and a channel positioned between the first surface and the second surface. The channel has a first wall adjacent to and extending in a first direction from the first surface, the first wall having a height in the first direction, a second wall adjacent to and extending in the first direction from the second surface, the second wall having a height in the first direction, and a joining section that joins the first wall to the second wall. The height of the first wall and the height of the second wall are different.