Roof Window Screening Bracket with Spring Counterweight
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Solution Overview
Problem
Top hung roof windows with installed screening devices become unstable due to added weight, and existing solutions do not address the simplicity and ease of installation for retrofitting on already installed windows.
Innovation Solution
A screening device with a bracket system comprising two mounting brackets, each with a first and second bracket part, allowing for rotational connection and snap-locking mechanisms, along with spring biased lifting arms to counteract the weight and ensure stability and ease of installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a screening device is mounted on a top hung roof window, then the window gains screening functionality, but the added weight causes the window to become unstable in its open position
Solution Approach 1:
The patent applies a spring mechanism that acts as a counterweight to offset the additional weight of the screening device. The spring is configured to exert an upward force on the sash, balancing the gravitational pull of the screening device and maintaining window stability in the open position despite the added weight.
2Adaptability or versatility
If a screening device is retrofitted to an already installed roof window, then the window gains screening functionality, but the installation process becomes complex and time-consuming
Solution Approach 1:
The mounting bracket is divided into two separate parts: a first bracket part that attaches to the roof window frame, and a second bracket part that attaches to the screening device. These parts can be independently installed and then connected, allowing for flexible retrofitting without requiring complete disassembly or complex sequential installation steps.
Solution Approach 2:
The connection between the first and second bracket parts allows for rotational movement, enabling the bracket assembly to adapt to the angular position of the window during installation and operation. This dynamic connection simplifies the installation process by accommodating different mounting angles without requiring precise pre-alignment.
3Reliability
If a traditional screening device mounting method is used (mounting top element first, then connecting side elements), then the screening device is securely installed, but the installation process is complex and difficult to perform from inside the building
Solution Approach 1:
The mounting system is segmented into a first bracket part attached to the window frame and a second bracket part attached to the screening device, with the connection between them allowing rotational movement. This segmentation enables installers to work from inside the building, connecting the two parts through the window opening without requiring exterior access or complex sequencing.
Solution Approach 2:
The rotatable connection between bracket parts provides dynamic adjustment capability during installation, allowing the screening device to be positioned and secured from inside the building. The rotational freedom accommodates the geometric constraints of installing from an interior position while maintaining secure mounting.
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 robust, secure, and easy-to-install screening device that maintains the stability of roof windows in open positions and follows the movement of the window for smooth operation, while being aesthetically appealing and compact.
Implementation Method 1
an extendable lifting arm comprising a spring biased part such as a gas spring urging the lifting arm towards its extended position thereby counteracting the roof window's own weight
Data Source
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AI summary
The invention concerns a screening device (13) for a roof window (1) the screening device comprising a top element (14) and two side rails (17, 18), the two side rails each having a longitudinal slot (172, 182), a screening body (22) having mutually opposite side sections guided in the longitudinal slots, the two side rails further comprising a guide channel (171, 181) for at least one gliding bracket (23, 24) which is adapted for being mounted at or on a bottom part of the sash of the window, the screening device (13) further comprising a bracket system for mounting the top element of the screening device on the roof window. The bracket system comprises two mounting brackets (50), each with a first bracket part (51) and a second bracket part (52), the first bracket part comprising a section (511) for mounting the first bracket part on the roof window and means (518) for being connected to corresponding means (528) of the second bracket part, the second bracket part (52) comprises an element (521) for attachment to the side rail and a reception element (530) for reception of a corresponding reception element (141, 142) of the top element (14). The invention further concerns a method for mounting such a screening device (13) on a roof window (1).