Retractable Screen Barrier With a Vertically Movable Lift Bar

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Solution Overview

Problem

Existing retractable screens face difficulties in deploying and retracting due to binding issues at the edges, and they struggle to accommodate uneven floor surfaces and vertical screen positions, leading to inconsistent sealing and operation challenges.

Innovation Solution

An adjustable vertical barrier comprising a housing with a vertically movable weighted lift bar and a felt gasket that conforms to the floor surface, allowing the screen to adjust to uneven surfaces and maintain consistent tension.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed bottom edge weight bar is used in retractable screens, then the screen structure is simple, but the screen cannot accommodate uneven floor surfaces and maintains inconsistent sealing

Engineering Contradiction:

Improveadaptation to uneven floor surfacesVSAvoidscreen structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies the dynamics principle by making the bottom edge weight bar vertically movable within the housing rather than fixed. The weight bar can move up and down along the vertical axis to adapt to different floor heights and contours, transforming a static structure into a dynamic one that automatically adjusts to uneven surfaces while maintaining sealing effectiveness

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent segments the bottom edge assembly into separate functional components: the housing that guides the screen edge, the movable weight bar that provides tension and adapts to floor variations, and the felt gasket that provides sealing. This segmentation allows each component to perform its specific function independently while working together as a unified system

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If traditional tracks are used to guide the screen edges, then the screen can be contained, but the tracks bind and make deployment and retraction difficult

Engineering Contradiction:

Improvescreen deployment and retractionVSAvoidtrack binding issues

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent extracts the guiding function from traditional side tracks and relocates it to vertical guide surfaces within the housing at the bottom of the opening. This extraction eliminates the binding problem associated with horizontal tracks while maintaining the necessary guidance function, allowing smooth deployment and retraction of the screen

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a felt gasket as an intermediary element between the screen edge and the floor surface. This soft, compliant material mediates the interaction between the rigid screen structure and the variable floor surface, providing consistent sealing without creating binding or friction issues that would impede screen movement

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If the screen bottom edge is fixed in position, then the structure is stable, but the screen cannot conform to vertical screen positions and uneven floors

Engineering Contradiction:

Improveadjustment to vertical screen positionsVSAvoidscreen bottom edge stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent employs the counterweight principle by using a weighted lift bar at the bottom edge of the screen. The weight provides downward force that maintains consistent tension on the screen mesh, ensuring stable positioning and proper sealing against the floor while allowing vertical adjustment to accommodate different screen heights and floor conditions

Inventive Principle:

Principle #8Anti-weight (Counterweight)

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 ensures smooth deployment and retraction of the screen while effectively sealing against bugs and wind, accommodating various floor contours and maintaining screen tension, enhancing usability and functionality.

Implementation Method 1

The lift bar 70 is weighted. The weighted lift bar is freely vertically movable within the lift bar enclosure so that the felt gasket conforms to the contour of a floor surface

Methodology Applied

Scientific EffectGravity: Gravitation

Data Source

PatentUS12448840B2Adjustable vertical barrier for a retractable screen

Publication Date: 2025.10.21 ESS MANUFACTURING INC

AI summary

An adjustable vertical barrier placed at the bottom of a retractable screen to adjust for an uneven floor surface comprised of a housing for attached on one end of the screen enclosure and weighted lift bar within the housing for attachment of a felt gasket, whereby the lift bar is freely vertically movable within the housing so that the felt gasket conforms to the contour of a floor surface and the lift bar is retained within housing a foot on the lift bar cooperates with a first notch within the housing.