LFRT Window Well with Variable Ribs for Strength
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Solution Overview
Problem
Traditional window wells are heavy, expensive, prone to damage, and lack durability and aesthetic appeal, with metal options being costly and prone to corrosion, while plastic alternatives sacrifice strength for aesthetics.
Innovation Solution
The development of lightweight and durable window wells made from long fiber reinforced thermoplastic materials with omnidirectional glass fibers, featuring a U-shaped body with variable wall thickness and ribs for increased strength, and a manufacturing process involving heated thermoplastic sheets compressed within molds to achieve a strong yet lightweight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal window wells are used, then strength and durability are improved, but weight and cost increase
Solution Approach 1:
The patent uses fiber-reinforced plastic composite material that combines plastic matrix with reinforcing fibers (such as glass fibers or cellulose fibers). This composite structure provides metal-level strength while maintaining the lightweight advantage of plastics, directly resolving the contradiction between strength and weight.
2Strength
If metal window wells are used, then strength is improved, but ease of transportation and installation deteriorate
Solution Approach 1:
The fiber-reinforced plastic composite material provides high strength-to-weight ratio, making the window well strong enough for structural applications while lightweight enough for easy transportation and installation by one or two people, eliminating the need for heavy equipment.
3Ease of manufacture
If plastic window wells are used, then ease of manufacture and aesthetics are improved, but strength and durability deteriorate
Solution Approach 1:
The patent incorporates reinforcing fibers (glass fibers, cellulose fibers, or other natural/synthetic fibers) into the plastic matrix during the molding process. This creates a composite material that maintains the ease of plastic manufacturing while achieving metal-level strength and durability.
Solution Approach 2:
The patent changes the material parameters by incorporating fiber reinforcement into the plastic, transforming it from a weak material to a high-strength composite. The fiber content, length, and orientation are controlled to achieve desired mechanical properties while maintaining manufacturability.
4Strength
If metal window wells are used, then strength is improved, but resistance to corrosion deteriorates
Solution Approach 1:
The fiber-reinforced plastic composite material inherently resists corrosion from water, soil, and chemicals that would cause metal to rust or deteriorate. The plastic matrix and fiber reinforcement both provide excellent corrosion resistance while maintaining structural strength.
5Shape
If traditional plastic window wells are used, then aesthetics are improved, but impact resistance deteriorates
Solution Approach 1:
The fiber-reinforced plastic composite material provides both aesthetic flexibility (can be molded into various shapes and finished with textures) and high impact resistance (fibers prevent crack propagation and material failure under impact).
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 provides a cost-effective, impact-resistant, and aesthetically pleasing window well that is easier to transport, install, and maintain, with improved durability and reduced repair costs, while also offering customizable textures and colors.
Implementation Method 1
heating a fiber reinforced thermoplastic sheet to more than 250° F.
Implementation Method 2
compressing the fiber reinforced thermoplastic sheet within the mold with a pressure of greater than 200 psi
Data Source
AI summary
A lightweight and durable window well is composed of a long fiber reinforced thermoplastic (LFRT). The lightweight and durable window well has at least some fibers that are omnidirectional relative to the other fibers in the thermoplastic. Additionally, at least some fibers of the LFRT have a length greater than 40 mm. The window well also has a body having a plurality of ribs interposed between a plurality of wall surface portions. Additionally, each rib is positioned between two different wall surface portions and is defined by a variable height and a variable depth. Furthermore, the wall surface portions have a variable thickness that varies from a minimal thickness of less than 3 mm to a maximum thickness of greater than 5 mm, with the wall surface being thicker near the ribs than at portions furthest from the ribs in the wall surface.