Flexible Drip Cap Adapts to Fenestration Curves
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Solution Overview
Problem
Conventional drip caps for fenestration units with curved top edges require custom shapes, which are difficult to manufacture and handle, and often result in reduced water shedding performance and aesthetics.
Innovation Solution
A flexible drip cap design featuring a flange member, cap member, and seal member attached along a length, allowing for easy bending to adapt to various fenestration unit shapes while maintaining structural integrity and water shedding performance, and can be manufactured and stored in a straight format for simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If custom-shaped aluminum or polymeric drip cap is used for fenestration units with curved top edges, then the drip cap can follow the contour of the fenestration unit, but the drip cap becomes large, rigid, and difficult to transport and handle
Solution Approach 1:
The patent applies this principle by using a flexible polymeric material to form the drip cap that can bend and conform to curved surfaces. The flexible material allows the drip cap to follow the contour of fenestration units with curved top edges while remaining easy to transport and install, eliminating the rigidity problem of traditional custom-shaped aluminum drip caps
Solution Approach 2:
The patent divides the drip cap into two separate components: a cap member and a flange member. This segmentation allows each component to be manufactured and stored in a straight, compact format for easy transportation, while enabling the components to be bent and assembled into the required curved configuration during installation
2Shape
If conventional straight drip cap is bent and folded to approximate curved top edges, then custom shapes can be achieved, but water shedding performance and aesthetics are reduced
Solution Approach 1:
The patent changes the material parameter from rigid (traditional aluminum) to flexible (polymeric material), which fundamentally alters how the drip cap can be formed. This parameter change enables the creation of smooth, continuous curved shapes that properly direct water flow, eliminating the poor water shedding performance associated with bent and folded straight drip caps
3Shape
If different custom drip cap is obtained for fenestration units having curvatures of different radii, then each specific shape requirement is met, but the complexity of manufacturing and inventory increases
Solution Approach 1:
The patent creates a universal drip cap system where a single flexible polymeric product can be adapted to fenestration units with various curvature radii. The flexible material and segmented design allow the same cap member and flange member to be bent into different configurations during installation, eliminating the need to manufacture and inventory multiple custom-shaped drip caps for different radius requirements
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 flexible drip cap effectively adapts to differently shaped fenestration units, maintaining good water shedding performance and structural integrity without the need for custom bending, and simplifies manufacturing, transportation, and installation.
Implementation Method 1
The flexible drip cap described herein may be easily bent, either elastically or plastically, to adapt to the shape of a variety of fenestration unit frames while maintaining structural integrity required to shed water as needed.
Data Source
AI summary
Flexible drip cap for use with fenestration units and related methods. The flexible drip cap includes a flange member and a cap member attached to each other along a length of the drip cap, with a seal member located between the flange member and the cap member. The seal member provides a seal to limit water infiltration between the flange member and the cap member when the drip cap is positioned on a fenestration unit.