Hinged Fenestration Unit for Insulated Glass Access
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Solution Overview
Problem
Traditional insulating glass units are sealed and the space between panes is generally inaccessible, limiting maintenance and access for window accessories or services.
Innovation Solution
The development of a fenestration unit with a hinge lug system, restrictor link, and push latch assembly that allows for hinged access to the insulated glass space, enabling rotation and release of the secondary sash for maintenance and access while maintaining thermal insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional insulating glass units are sealed, then thermal insulation performance is maintained, but access to the space between panes is lost
Solution Approach 1:
The patent applies the dynamics principle by making the insulating glass unit partially movable through a hinge mechanism. The IG unit can rotate from a closed position (maintaining thermal insulation) to an open position (providing access to the space between panes). This dynamic configuration allows the system to switch between two states: sealed for thermal performance and open for maintenance access, resolving the contradiction between maintaining insulation and enabling access.
2Ease of operation
If a hinge mechanism is added to enable access, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the hinge mechanism into distinct functional components: a hinge lug with mounting portion, cam portion, and retention portion; retention arms with fingers; and a secondary sash. This segmentation allows each component to perform its specific function independently while simplifying the overall assembly and maintenance process. The modular structure reduces complexity by making individual parts replaceable and easier to manufacture.
Solution Approach 2:
The retention arms with elastically deflectable fingers provide self-service functionality by automatically engaging with and disengaging from the IG unit during rotation. The elastic deflection allows the retention fingers to flex during installation and removal without requiring additional tools or complex locking mechanisms, simplifying the overall hinge system while maintaining ease of operation.
3Ease of manufacture
If retention arms with elastic deflection are used, then ease of installation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies parameter changes by utilizing the elastic properties of the retention arms, which can deflect within a specific range to accommodate manufacturing tolerances. The elastic deflection characteristic allows the retention fingers to adjust their position dynamically, compensating for variations in manufacturing precision. This parameter-based approach (using elastic modulus and deflection range) simplifies installation while maintaining functional reliability without requiring extremely tight manufacturing tolerances.
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
Provides reliable and simplified access to the insulated glass space for maintenance and installation of window accessories, enhancing the usability and longevity of fenestration units while maintaining thermal performance.
Implementation Method 1
a first retention arm extending from the lug body and retaining another portion of the other of the first component and the second component such that the retention arm is elastically deflectable away from the retention lip
Data Source
AI summary
Various systems and methods are provided for controlling access to the insulated glass space of a fenestration unit. A hinge lug is provided including a lug body having a mounting portion, a cam portion defining a curved cam surface, and a retention portion projecting from the cam portion, and a first retention arm extending from the lug body such that the retention arm is elastically deflectable away from the retention lip. A restrictor link is provided including a restrictor link body having a first end and a second end, wherein the restrictor link body is elastically deflectable, a securing lock positioned proximate the second end, and a cap extending from the securing lock, the cap defining an engaging surface operable to engage the lip channel of the sash. A latch system is provided including a latch base with a ramp access aperture and a latch body including a ramp.