Internal Screen Module for Tilt Window Sash
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Solution Overview
Problem
Conventional window screens are visible and obstruct the aesthetic appearance of windows, and they do not efficiently clean themselves as they deploy and retract.
Innovation Solution
A window sash with an internal screen that deploys through a brush-lined slot as the sash opens and closes, using a screen module with a housing and angled mounting brackets to engage the window's tracks, and a tensioning member to keep the screen rigid, with brushes or polymeric blades cleaning the screen as it moves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional window screen is installed, then insect protection is provided, but the screen is visible and obstructs the aesthetic appearance of the window
Solution Approach 1:
The screen is extracted from its conventional fixed position and integrated into a deployable module that can be concealed within the window sash. The screen module housing is recessed into the sash cavity, allowing the screen to be taken out of view when not in use while remaining accessible when needed.
Solution Approach 2:
The screen transitions from a static, always-visible state to a dynamic, deployable state. The screen is mounted on a rotatable tube that can rotate between a concealed position (within the sash) and a deployed position (extending through the window opening), allowing it to adapt its visibility based on operational needs.
2Ease of operation
If the screen deploys through a slot in the housing, then the screen can be extended and retracted, but the screen accumulates debris during movement
Solution Approach 1:
The screen cleaning function is integrated into the deployment mechanism itself. As the screen moves through the slot during deployment and retraction, brushes attached to the housing automatically contact and clean the screen surface, eliminating the need for separate cleaning operations.
Solution Approach 2:
The cleaning function is merged with the deployment function. The same motion that deploys the screen also activates the cleaning action, combining two separate functions (deployment and cleaning) into a single integrated process that occurs simultaneously during screen movement.
3Shape
If the screen is kept retracted in the housing, then aesthetics are maintained, but the screen cannot prevent insect ingress when the window is open
Solution Approach 1:
The screen system dynamically adapts its position based on window operation state. When the window is closed, the screen remains concealed in the housing for aesthetics. When the window is opened, the screen deploys to provide insect protection, seamlessly transitioning between aesthetic and functional states.
Solution Approach 2:
The screen is pre-positioned in a concealed state within the housing before the window is opened. This preliminary concealed position maintains aesthetics during normal closed-window conditions, while the quick-deploy capability ensures insect protection is immediately available when the window is opened.
4Stability of the object's composition
If a tensioning member is used to keep the screen rigid when deployed, then screen stability is improved, but the mechanism complexity increases
Solution Approach 1:
The tensioning function is achieved through a spring mechanism that provides continuous elastic force, replacing more complex mechanical tensioning systems. The spring naturally maintains screen tension and rigidity through its elastic properties, simplifying the overall mechanism while ensuring screen stability during deployment.
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 screen is hidden until the window is opened, effectively preventing insect ingress and maintaining a clean state through self-cleaning as it deploys and retracts, enhancing both functionality and aesthetics.
Implementation Method 1
a screen mounted on a holder having an anchored end and a free end... with a brush positioned approximate to the slot for engaging the screen to remove debris while passing through the slot
Implementation Method 2
the screen mounted on a tube with the tube having an internal spring fixedly attached at one end to a non rotating housing member and the rotatable tube
Data Source
AI summary
A tilt window having sash with an internal screen that deploys when the sash is opened and retracted when the sash is closed with a cleaning mechanism in the form of a brush lined slot engaging the screen as it moves into and out of the sash receptacle.