Screen Retention Track for Wind-Responsive Bead Clamping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing screen retention systems fail to provide adequate locking strength that increases with increasing wind pressure, leading to potential screen detachment and damage during high winds.
Innovation Solution
A screen track with a centrally disposed chamber that houses a base member capable of moving between contracted and expanded positions, featuring a shaped entry to pinch the beaded edge of the screen and include an expansion member to maintain tension, along with a clip to support and reinforce the zipper edge, ensuring secure attachment even under high wind conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a screen is secured using spaced apart fasteners, then the device complexity is reduced and ease of manufacture is improved, but the reliability and locking strength under high wind pressure deteriorate
Solution Approach 1:
The retention track employs a dynamic base member that moves between contracted and expanded positions in response to wind pressure. The base member expands under load to increase clamping force on the screen, transforming a static fastening system into a dynamic one that adapts to environmental conditions. This resolves the contradiction by maintaining manufacturing simplicity while achieving reliable, load-responsive securing.
Solution Approach 2:
The system changes the clamping pressure parameter in response to wind load. The base member's movement alters the physical state of the screen-retention interface, increasing friction and normal force under high wind conditions. This parameter change enables the simple spaced fastener design to achieve high reliability under extreme conditions without complex multi-point fastening systems.
2Reliability
If a screen is secured with a continuous edge attachment, then the locking strength and reliability under high wind pressure are improved, but the device complexity increases and ease of manufacture deteriorates
Solution Approach 1:
The retention system segments the continuous attachment function into discrete base members spaced at intervals along the screen edge. Each base member independently provides continuous-edge-like clamping through its expansion mechanism, eliminating the need for a complex continuous tracking system while maintaining high locking strength at each attachment point.
Solution Approach 2:
The base member serves itself by automatically expanding under wind pressure to increase clamping force. This self-adjusting mechanism eliminates the need for complex external actuation systems, sensors, or control mechanisms that would be required to achieve continuous-edge attachment reliability, thereby reducing overall device complexity while maintaining high locking strength.
3Strength
If spring-loaded connecting members are used to maintain curtain taut, then the screen tension is improved, but the spacing between members creates areas where the screen can bind and the device complexity increases
Solution Approach 1:
The invention extracts the spring mechanism from the connecting members and relocates it to the base members themselves. This eliminates the need for separate spring-loaded connecting members and their associated complexity, while the base member's expansion mechanism still provides the necessary tensioning force to keep the screen taut without creating binding areas.
4Ease of operation
If the base member is held in a contracted position by an expansion member, then the ease of operation is improved, but the locking strength under wind pressure deteriorates until the base member expands
Solution Approach 1:
The expansion member provides preliminary counter-action by holding the base member in the contracted position during normal operation, preventing unnecessary expansion and maintaining ease of operation. When wind pressure exceeds the retention threshold, this preliminary anti-action is overcome and the base member expands to provide the necessary clamping strength, effectively preparing the system to transition from easy operation to high-strength retention.
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 enhances screen retention by increasing clamping pressure in response to wind pressure, preventing screen detachment and maintaining consistent tension, thus protecting structures from wind damage.
Implementation Method 1
the shaped entry is deformed to cause a pinching of the beaded edge in relation to the amount of wind pressure placed against the screen
Implementation Method 2
The expansion member is constructed from an elastomeric material and has a first end secured to the upper receptacle and a second end secured to the lower receptacle
Data Source
AI summary
A screen attachment formed from a track having a centrally disposed chamber for receipt of a base member constructed and arranged to receive a beaded edge of a flexible hurricane screen. The base member employs an opening having a shaped entry. The base member is movable between a contracted position to an expanded position, wherein the shaped entry is deformed to cause a pinching of the beaded edge. The base member includes an expansion member to maintain the base member in a contracted position when possible. A clip can be added to support and reinforce a zipper beaded edge which allows an operator to raise a base slat well into an upper housing without the zipper exiting the track.