Fenestration Interpanel Coupling System with Resilient Seal
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Solution Overview
Problem
Existing fenestration units face challenges in effectively blocking, closing-off, and sealing the interpanel gap between panels, which is costly, difficult to manufacture and assemble to high tolerances, and requires complex designs.
Innovation Solution
A fenestration unit with an interpanel coupling system that includes first and second coupling members with projections and seal members, allowing for efficient sealing and movement of panels between closed and open positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional interpanel gap sealing solutions are used, then the gap can be blocked and sealed, but manufacturing costs increase and assembly becomes more difficult
Solution Approach 1:
The sealing system is divided into separate modular components: a coupling member with integration features and a distinct seal member. This segmentation allows each component to be manufactured independently with standard tolerances, reducing overall manufacturing complexity and cost while maintaining effective sealing when assembled.
Solution Approach 2:
The coupling member integrates multiple functions into a single component: structural coupling between panels, alignment guidance through protrusions and recesses, and seal mounting. This merging eliminates the need for separate alignment fixtures and sealing mechanisms, simplifying assembly and reducing part count.
2Reliability
If high-tolerance manufacturing is used for interpanel gap features, then sealing effectiveness improves, but manufacturing time and costs increase
Solution Approach 1:
By separating the coupling and sealing functions into different components, each can be manufactured with standard tolerances rather than requiring high-tolerance precision. The assembly process accommodates normal manufacturing variations through the modular design, reducing both manufacturing time and cost while maintaining sealing reliability.
Solution Approach 2:
The design transitions from requiring precise dimensional control (high tolerance) to accommodating dimensional variation through elastic deformation of the seal member. This parameter change in the sealing mechanism allows standard manufacturing tolerances to suffice, reducing production time and cost.
3Reliability
If complex interpanel gap sealing mechanisms are used, then sealing performance improves, but device complexity increases
Solution Approach 1:
Multiple functions are merged into the coupling member: structural connection, alignment through geometric protrusions and recesses, and seal mounting. This integration eliminates the need for separate alignment devices, adjustment mechanisms, and mounting brackets, significantly reducing design complexity while maintaining effective weather and noise blocking.
Solution Approach 2:
The coupling member serves as a universal component that performs coupling, alignment, and sealing mounting functions simultaneously. This multi-functionality reduces the number of parts needed in the system, simplifying the overall design while achieving reliable sealing performance.
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 interpanel coupling system effectively seals the gap between panels, reduces manufacturing and assembly costs, simplifies installation, and provides adaptable thermal performance and structural support.
Implementation Method 1
The seal member is configured to engage and resiliently deflect against the other of the first projection and the second projection when the second panel is in the closed position
Implementation Method 2
The seal member is configured to disengage the other of the first projection and the second projection and resiliently recover toward a neutral position as the second panel moves toward the open position
Data Source
AI summary
A fenestration unit with a first panel and a second panel, one panel being supported for sliding relative to the other. The fenestration unit includes an interpanel coupling system with a first coupling member and a second coupling member. The first coupling member includes a first facing member and a first projection that projects from the first facing member into an interpanel gap. The second coupling member includes a second facing member and a second projection that projects from the second facing member into the interpanel gap. The coupling system including a seal member that is attached to the first projection or the second projection. The seal member is configured to engage and resiliently deflect against the other of the first projection and the second projection when the second panel is in the closed position.