Hinged Window Sash Seal with Collar and Profiled Groove
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Solution Overview
Problem
Existing top-hung windows with folding sashes experience leaks due to non-uniform sealing and excessive stress on seals during opening and closing, particularly at the transition area between the side and top seals, leading to compromised tightness against rain and water ingress, especially in rail vehicle glazing where normative specifications require effective sealing.
Innovation Solution
A window design featuring a circumferential seal around the entire circumference of the hinged window sash that presses against both the inner wall and collar of the window frame, creating multiple sealing points in series without shearing forces, and utilizing a profiled groove for easy attachment of the seal, ensuring a high level of tightness with minimal space and construction effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sealing planes or sealing edges are provided around the folding frame, then the tightness is improved, but the construction effort and space requirement increase
Solution Approach 1:
The sealing function is segmented into multiple sealing points along a single continuous seal profile. The seal creates sequential sealing points (first sealing point at the folding frame, second sealing point at the window frame) rather than requiring multiple separate seal planes, thus achieving improved tightness without proportionally increasing construction complexity
Solution Approach 2:
The seal is designed to extend in the depth direction beyond the folding frame surface toward the window frame, creating sealing points in the depth dimension rather than only in the planar dimension. This allows multiple sealing points to be achieved without adding multiple sealing planes in the traditional sense
2Reliability
If the seal is pressed together with high force during closing, then the sealing effect is improved, but the seal is subjected to excessive stress and ultimately fails
Solution Approach 1:
The sealing force is segmented and distributed across multiple sealing points along the seal's length. Rather than concentrating high compression force at a single sealing line, the force is distributed sequentially across the first sealing point and second sealing point, reducing peak stress on any single point while maintaining overall sealing effectiveness
Solution Approach 2:
The seal profile is pre-designed with specific geometric features (convexities and concavities) that cushion and distribute the closing force before it reaches the sealing interface. The profiled groove and seal geometry act as a cushioning mechanism that prevents excessive stress concentration
3Ease of manufacture
If a single sealing surface is provided around the folding frame, then the construction is simplified, but local disturbances such as dirt can lead to leaks
Solution Approach 1:
The single continuous seal is segmented into multiple functional sealing points along its length. Even though it appears as one continuous component, it creates discrete sealing points (first sealing point at folding frame, second sealing point at window frame) that provide redundant sealing paths, so local contamination at one point does not necessarily compromise the entire seal
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 achieves permanent and effective sealing of the hinged window sash, reducing the risk of leaks and maintaining tightness even under stress, while minimizing space requirements and construction complexity.
Implementation Method 1
the circumferential seal presses against the inner wall and the circumferential collar of the window frame
Data Source
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AI summary
Window with a hinged sash attached to its frame and hinged window sash. The invention relates to a window (1) with a window frame (3) and a hinged sash (2) attached to the window frame (3) in a hinged manner, with a hinged frame (9) comprising a window pane (7) which can be sealed all around against the window frame (3). In order to improve such a window so that it is characterized by good sealing in the area of the hinged sash while requiring little space, the hinged frame (9) has a circumferential hinged frame extension (10) with a circumferential seal (12) on its circumference, which also covers a surface of the hinged frame extension (10); the window frame (3) has a circumferential collar (6) extending inwards over its inner wall (4) with an angled sealing nose (7) for interaction with the circumferential seal (12) on the surface of the hinged frame extension (10).The invention also relates to a hinged window sash.