Self-Adjusting Weight Bar Seals Contoured Floor Gaps
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Solution Overview
Problem
Conventional roll down screens and shutters with horizontal weight bars fail to effectively seal gaps on non-level or contoured surfaces, allowing insects and dust to enter enclosed areas due to their inability to adjust to variable pitched or sloped floor surfaces.
Innovation Solution
A self-adjusting weight bar system with a movable blade that contacts the floor, ensuring a seal by adjusting to the surface's angle and using a weather strip to fill gaps, while maintaining horizontal alignment with side tracks and incorporating a stiffening mechanism for rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a horizontal weight bar is used, then the structure is simple and easy to manufacture, but it fails to seal gaps on non-level or contoured surfaces
Solution Approach 1:
The patent applies the dynamics principle by making the weight bar adjustable and flexible rather than fixed and rigid. The weight bar incorporates a series of articulated segments that can dynamically change their configuration to adapt to varying floor surfaces, allowing the bar to maintain contact and seal gaps on non-level surfaces while remaining relatively simple in construction.
Solution Approach 2:
The patent employs parameter changes by allowing the weight bar's geometric parameters (angle, position of segments) to vary in response to floor contour variations. This enables the same basic structure to effectively seal gaps across different surface conditions without requiring multiple specialized components for each scenario.
2Manufacturing precision
If the weight bar adjusts to the floor surface, then sealing effectiveness improves, but the weight bar may lose horizontal alignment with side tracks
Solution Approach 1:
The patent applies segmentation by dividing the weight bar into multiple independent articulated segments. Each segment can adjust individually to floor variations while the overall bar maintains its horizontal alignment through the coordinated movement of segments constrained by guides within the side tracks, thus preserving both sealing effectiveness and alignment stability.
3Adaptability or versatility
If a self-adjusting mechanism is added, then adaptability to variable surfaces improves, but device complexity increases
Solution Approach 1:
The patent implements self-service by designing the weight bar to automatically adjust to floor surfaces through its own weight and the mechanical properties of its articulated segments. The bar self-regulates its configuration to maintain contact with varying surfaces without requiring external control mechanisms, motors, or complex adjustment systems, thereby achieving high adaptability with minimal added complexity.
Data Source
AI summary
A roll down movable vertical screen, panel or shutter system (such as used for protecting against insects, solar wind, hurricanes, rain or providing for privacy and security having a bottom edge-weight bar and self-adjusting blade that automatically adjusts to variable pitched surfaces to seal the gap resulting from a roll down screen or shutter's bottom horizontal weight bar and a floor surface that is contoured or pitched in a non-horizontal direction running parallel to the direction of the weight bar. The self-adjusting weight bar for variable pitched surfaces generally including: a weight bar body, a self-adjusting blade, customizable attachment point, variable weights, and anti-warping stiffeners. These elements are to be found as the lowest element of a roll down screen or shutter. The extended elongated weight bar is attached at the bottom edge of a screen and includes a hollow chamber that receives an L-shaped blade that is movably mounted within the hollow chamber so that the blade can conform to the tilt angle or compound contour of the floor.