Stair Cage with Segmented Tracks and Friction Brakes
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Solution Overview
Problem
Existing stair assistance devices are not reliable, costly, and difficult to install, failing to provide adequate support for elderly individuals navigating stairs, which compromises their independence and safety.
Innovation Solution
A stair cage system comprising two elongated track members attached to opposing walls with cross-bars and a brake assembly, allowing for secure sliding and braking, along with a guard member for stability, made from steel or rigid plastic with padding for comfort, designed for easy installation and low cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional stair assistance devices are used, then reliability is improved, but cost and installation difficulty increase
Solution Approach 1:
The stair cage system is divided into separate modular components: track members that attach to walls, cross-bars that move independently on the tracks, and brake assemblies that can be engaged or disengaged. This segmentation allows each component to be installed and adjusted independently, reducing overall installation difficulty while maintaining system reliability
Solution Approach 2:
The cross-bars are designed to be movable along the tracks rather than fixed, allowing the cage to adapt dynamically to different staircase configurations and user needs. The brake assemblies provide dynamic control, enabling the system to transition between locked and moving states as needed, enhancing both reliability and ease of operation
2Reliability
If traditional stair assistance devices are used, then reliability is improved, but cost increases
Solution Approach 1:
The patent employs simple, inexpensive materials such as steel or rigid plastic for the track members and cross-bars, with basic brake assemblies that can be manufactured at low cost. The design avoids complex mechanisms, electronics, or expensive components, focusing instead on straightforward mechanical elements that are reliable yet economical to produce
Solution Approach 2:
Rather than using a motorized or mechanically complex system to provide stair assistance, the invention inverts the approach by using a passive cage structure with simple brake assemblies. The reliability comes from the mechanical simplicity and robustness of the inverted design rather than from complex active control systems
3Reliability
If a cage structure is provided for stability, then safety is improved, but device complexity increases
Solution Approach 1:
The cross-bars serve multiple functions: they provide structural support for the cage, enable movement along the tracks, and incorporate brake assemblies for safety control. This multi-functionality reduces the need for separate components, thereby reducing overall device complexity while maintaining safety and stability
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 stair cage system provides reliable, low-cost, and easy-to-install support for individuals using stairs, enhancing safety and independence by allowing secure movement up and down with a stable and comfortable user experience.
Implementation Method 1
A brake assembly including at least one brake handle member is located in the center section. A brake line is mechanically connected to and controlled by the brake handle member and is mechanically connected to each track engaging member. When the brake handle member is engaged, the track engaging members and the two elongate cross-bars are stopped within the two elongated track members
Data Source
AI summary
A stair cage is a stair assistance apparatus having a rail attached to the wall on each side of a staircase, and two horizontal rails spaced horizontally apart but joined by cross bars and having wheels rotatably attached to the ends of the cross bars and engaged in tracks within the horizontal rails so that the cross bars are able to move up and down the stairway. A brake system having a brake assembly in the wheels and squeeze brake handles on the cross bars so that the user can control the descent or hold position on the ascent.