Slidable Window Sash Retainer Wind Deflection
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Solution Overview
Problem
Existing window constructions are prone to deflection under excessive wind force, which disrupts the sealing engagement of sash components, allowing air to flow between the window sides.
Innovation Solution
A window assembly kit with a frame and sash configuration that includes a retainer, where the sash is slidably mounted, allowing movement from a first to a second position, with the retainer interfering with inward movement at the first position and preventing further inward movement by a retainable part interacting with the retainer, ensuring proper sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sash is made of flexible material to allow slidable movement, then ease of operation is improved, but the sash becomes susceptible to deflection under wind force, worsening sealing engagement
Solution Approach 1:
A retainer component is introduced as an intermediary element between the sash and frame. The retainer includes a retainable part that engages with the frame to limit excessive inward movement of the sash, preventing deflection under wind force while allowing normal sliding operation for opening and closing the window.
2Strength
If the sash is allowed to move inward freely to accommodate wind pressure, then structural damage is prevented, but air leakage occurs due to disrupted sealing engagement
Solution Approach 1:
The retainer is pre-configured in the frame to provide preliminary resistance against excessive inward movement of the sash. When wind pressure applies force to the sash, the retainable part engages with the retainer at a predetermined position, preventing over-deflection before it can disrupt the sealing engagement and cause air leakage.
3Reliability
If a retainer is added to prevent excessive sash movement, then sealing engagement is improved, but device complexity increases
Solution Approach 1:
The window assembly is segmented into distinct functional components: the frame, the sash, and the retainer with its retainable part. This segmentation allows each component to perform its specific function independently - the retainer handles limiting excessive movement while the sash maintains sealing engagement, simplifying the overall design despite the additional component.
Data Source
AI summary
There is provided a kit of parts configurable for assembly within a window assembly, that defines a window opening, and includes a frame and a sash, wherein the sash is slidably mounted relative to the frame for slidable movement relative to the frame from a first position to a second position, wherein the kit comprises a frame member of the above-described frame, a sash member of the above-described sash; wherein: the frame member defines a retainer; and the frame, the retainer, and the sash are co-operatively configured such that, while the sash is disposed relative to the frame in the first position, the retainer is interfering with movement of the sash member in an inwardly direction, and while the sash is disposed relative to the frame in the second position, there is an absence of interference to movement of the sash member in the inwardly direction. There is also provided a window construction obtainable from assembly of at least the parts of the kit of parts.