Clamped Glazed Unit Seal Geometry to Prevent Peripheral Sliding
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Solution Overview
Problem
Clamped-type glazed units in aeronautical applications risk coming loose during pressurization or structural breakage, leading to depressurization due to peripheral sliding on mounting structures.
Innovation Solution
A laminated glazed unit design with a structural block overhanging relative to a protective sheet, featuring a peripheral seal with angled spacer parts that limit peripheral sliding by forming negative angles with the mounting structure, preventing dislodgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the contact region between the windowpane retainer and the window seal is located in the same plane (α=0), then the manufacturing is simplified, but the glazed unit risks coming loose during pressurization or breakage
Solution Approach 1:
The patent applies asymmetry by positioning the windowpane retainer and seal contact regions at different planes relative to the glazed unit surface. The windowpane retainer contacts at plane α=0 (parallel to external surface), while the seal contacts at plane β with positive angle (parallel to internal surface), creating an asymmetric clamping arrangement that prevents loosening during pressurization
Solution Approach 2:
The invention transitions from a single-plane contact arrangement to a multi-plane configuration. By introducing the angular offset between the retainer contact plane and seal contact plane, the solution adds a dimensional aspect to the clamping mechanism, creating a wedge-like effect that secures the glazed unit more reliably
2Device complexity
If the peripheral seal has contact surfaces parallel to the main surface (α=0, β≥0), then the seal design is simplified, but the glazed unit can slide peripherally and come loose
Solution Approach 1:
The seal design uses asymmetric contact surfaces where the windowpane retainer interface is at α=0 while the mounting structure interface is at β>0. This asymmetric angular configuration creates a mechanical interlock that resists peripheral sliding while maintaining reasonable geometric simplicity
Solution Approach 2:
The angled contact surfaces are designed in advance to counteract the forces that would cause peripheral sliding. The positive angle β of the seal contact surface预先 creates a mechanical advantage that opposes sliding forces before they can cause the glazed unit to come loose
Data Source
AI summary
An assembly of a laminated glazed unit and the peripheral seal thereof, the laminated glazed unit including a transparent structural block, the peripheral seal having a first spacer part between the external surface of the structural block and a windowpane retainer, and a second spacer part between the internal surface of the structural block and the mounting structure, at least one of the contact surface between the first spacer part and the windowpane retainer and/or between the second spacer part and the mounting structure approaching the structural block, from the edge of the latter to the central part thereof; and the application of this assembly to a clamped glazed unit in the field of aeronautics or railways.