Vinyl Window Secure Corner Assembly Reinforcement
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Solution Overview
Problem
Conventional vinyl windows have lower design pressure ratings compared to aluminum windows, limiting their use in impact-rated applications, such as hurricane or tornado-prone areas, due to structural weaknesses, particularly at the corners where the sash and frame intersect.
Innovation Solution
Incorporating a secure corner assembly with a tilt latch assembly and secondary reinforcement members, which attach to aluminum reinforcement within the window sash, enhancing the structural integrity and impact resistance of vinyl windows by distributing and reducing load forces on the corners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If vinyl material is used for frame and sash components, then energy efficiency and cost are improved, but design pressure rating decreases
Solution Approach 1:
The invention combines vinyl frame material with aluminum reinforcement members to create a composite structure. The vinyl provides energy efficiency and corrosion resistance, while the aluminum reinforcement members provide the necessary structural strength to achieve high design pressure ratings (100+ lbs/ft²) while maintaining the energy efficiency of vinyl windows.
2Strength
If aluminum is used for frame construction, then design pressure rating exceeds 100 lbs/ft2, but cost and energy efficiency performance deteriorate
Solution Approach 1:
The composite design allows the window to achieve aluminum-like strength (exceeding 100 lbs/ft² design pressure rating) while maintaining vinyl's superior energy efficiency properties. The aluminum reinforcement is strategically placed only where structurally necessary, minimizing material cost while maximizing performance.
3Ease of manufacture
If unreinforced vinyl frame is used, then cost and ease of installation are improved, but design pressure is limited to 50 lbs/ft2
Solution Approach 1:
The reinforcement system is segmented into discrete aluminum members positioned at critical locations (corner assemblies and vertical stiles) rather than requiring full-frame reinforcement. This segmentation maintains ease of installation while achieving the necessary strength increase from 50 to over 100 lbs/ft² design pressure rating.
4Quantity of substance
If vinyl is used for window frame, then cost is reduced, but structural performance at corners deteriorates
Solution Approach 1:
The invention applies aluminum reinforcement locally at critical corner assemblies and vertical stiles where structural strength is most needed, rather than uniformly throughout the entire frame. This localized reinforcement achieves the necessary structural performance improvement while minimizing additional cost compared to full aluminum construction.
Data Source
AI summary
Windows and secure corner assemblies are generally described. The windows may include a sash having stiles arranged on vertical sides thereof and rails arranged on horizontal sides thereof. Primary reinforcement members may be arranged within the stiles. Secure corner assemblies may be configured to be arranged within corners of the sash formed by intersections of the stiles and the rails. The secure corner assemblies may include at least one secondary reinforcement member arranged on an external surface of one of the rails, such as a top rail. A tilt mechanism may be configured to be coupled to a primary reinforcement member and the at least one secondary reinforcement member, thereby providing a continuous reinforcement connection around the window sash. Vinyl windows using corner assemblies according to some embodiments may have increased pressure ratings compared to vinyl windows that do not include such corner assemblies.