Window Balance With Adjustable Pressure Spacer for Sash Support
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Solution Overview
Problem
Existing window balances, such as spiral and constant force balances, suffer from rusting, denting, bending, and breaking, leading to a shorter lifespan and complex repairs due to numerous parts, especially when two balances are required per window sash.
Innovation Solution
A window balance apparatus with a main body connected to a window frame and sash, featuring spacers and pressure delivery devices adjusted by set screws, allowing for adjustable pressure application and reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional spiral or constant force window balances are used, then the window sash can be positioned and held, but the parts rust, dent, bend and break easily, leading to shorter lifespan
Solution Approach 1:
The patent combines the positioning and balancing functions into a single integrated apparatus. The main body with T-shaped configuration integrates the window frame connection, spacer mechanism, and pressure delivery system into one unified structure, eliminating the need for separate spiral or constant force balance components that are prone to failure
Solution Approach 2:
The patent uses adjustable pressure delivery devices with pressure adjustment mechanisms that can modify the force applied to the spacer. This allows the system to adapt to different window sash weights and positions, optimizing performance while using simpler, more durable components compared to traditional spring-based systems
2Reliability
If traditional window balances with multiple parts are used, then the window sash can be supported, but the complexity and multiplicity of parts increase, making repairs time-consuming and complex
Solution Approach 1:
The patent merges multiple functions into a single integrated apparatus. The main body combines the mounting mechanism, spacer support, and pressure delivery system, reducing the number of separate parts from traditional multi-component balance systems to a unified structure that is easier to install and repair
Solution Approach 2:
The T-shaped main body serves multiple functions: it connects to the window frame, supports the spacer mechanism, and houses the pressure delivery device. This multi-functional design eliminates the need for separate components for each function, simplifying the overall system and reducing repair complexity
3Reliability
If traditional window balances are used, then the window sash can be held in position, but they cannot easily accommodate variations in window sash shapes, weights, and dimensions
Solution Approach 1:
The patent incorporates adjustable pressure delivery devices that can dynamically adapt to different window sash weights and positions. The pressure adjustment mechanisms allow the system to be tuned for various loading conditions, providing reliable holding capability across different window configurations without requiring multiple specialized components
Solution Approach 2:
The integrated main body design with adjustable pressure delivery provides universal applicability across different window sash types. The single apparatus can accommodate variations in weight and dimensions through adjustment mechanisms, eliminating the need for specialized balances for different window configurations
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 apparatus provides a robust and flexible solution with fewer moving parts, accommodating various window shapes and weights, simplifying installation and operation, and reducing repair complexity.
Implementation Method 1
The pressure delivery device is a spring
Data Source
AI summary
A window balance apparatus and method with a main body configured to movably connect with a window frame and a window sash. A spacer is connected with the main body, the spacer configured to extend from the main body when connected to the main body such that the spacer contacts the window frame. A pressure delivery device is located within the main body and is connected with the spacer and a pressure adjustment device is provided and is configured to adjustably contact the pressure delivery device so as to add or subtract pressure on the spacer.