Arch Shutter Beveled Louvre Clearance Design
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Solution Overview
Problem
Arch shutters for curved windows are difficult to manufacture, as louvres often interfere with the frame's curvature, restricting their tilt and requiring complex assembly, and existing solutions are unsightly or inefficient.
Innovation Solution
An arch shutter design with beveled louvre ends, central pivot axes, oblique pivot pin drillings and counterbores, and resilient sleeves for frictional stability, allowing for external assembly and full closure without obstructing the frame's light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If louvres are extended right out to the inside of the arch frame, then the curve or angle of the arch will interfere with the ends of the louvres, but this restricts tilting of the louvres so that they can never be tilted fully closed
Solution Approach 1:
The invention extracts the interfering portion by providing bevel portions that remove material at each end of each louvre. This creates clearance space that allows the louvre ends to clear the arch frame during tilting motion, enabling full closure without compromising light transmission when open.
Solution Approach 2:
The invention adds a dimensional solution by introducing bevel portions that create three-dimensional clearance space. The bevels angle the louvre ends to clear the arch frame curvature in the rotational path, allowing full tilting range while maintaining maximum light transmission area.
2Ease of manufacture
If pivot pins are inserted from the inside of the frame, then assembly is simplified, but this makes assembly of the shutter complex as pins must somehow be inserted into the frame and the louvres
Solution Approach 1:
The invention inverts the assembly sequence by first inserting pins into the louvres from the outside, then attaching the assembled louvres to the frame. This reversal simplifies the overall assembly process despite requiring oblique drilling, as the pin insertion becomes a straightforward external operation rather than a complex internal insertion.
Solution Approach 2:
The invention applies preliminary action by pre-attaching pins to the louvres before mounting them on the frame. This preliminary assembly step simplifies the final installation, as complete louvre assemblies with integrated pins are simply mounted to the frame rather than requiring complex in-situ pin insertion.
3Reliability
If fixed triangular shaped panels are secured inside the frame, then the louvres can abut against the vertical edges of the panels, but this is unsightly and closes off part of the arch frame so that no light can go through
Solution Approach 1:
The invention extracts the blocking panels entirely, removing the unsightly fixed triangular panels that obstructed light. Instead, bevel portions are provided directly on the louvre ends themselves, maintaining positioning stability without sacrificing light transmission or aesthetic appearance.
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 provides a functional, aesthetically pleasing arch shutter that can be easily assembled and fully closed, maintaining light transmission while ensuring precise alignment and stability of louvres.
Implementation Method 1
at least one of the pivot pins has a resilient sleeve thereon, frictionally engaging said pin and fitting within said counterbore
Data Source
AI summary
An arch shutter having a frame with an arch frame portion, and often with a linear lower frame portion, and louvres extending from side to side of the arch portion, parallel to the linear lower frame portion, and having a frame section of predetermined width, and bevel portions formed at each end of each louvre, the bevel portions removing a portion at each end of each louvre for providing clearance for rotation of each louvre without interfering with arch frame portion, and pivot pins inserted through drillings in the frame from the exterior.