Combinable ligature-resistant grab bar for vertical and horizontal application
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Solution Overview
Problem
Existing grab bars lack ligature resistance, particularly in both vertical and horizontal installations, posing a hazard in environments where unattended individuals may use them to form ligatures, as they often feature closed voids that can secure belts or cords.
Innovation Solution
A ligature-resistant grab bar design featuring an elongate body with curved side channels for water drainage and inclined top end cap, preventing ligature formation by eliminating gaps for securing objects, and allowing for both vertical and horizontal installations without internal gutters or drain holes to inhibit bacterial growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional grab bars are used, then they provide support for persons, but they create closed voids that can be used to form ligatures
Solution Approach 1:
The grab bar is segmented into multiple longitudinal elements with gaps between them, eliminating the closed void that enables ligature formation while maintaining structural integrity and support function
Solution Approach 2:
The gripping surface features an asymmetric contoured design with a smooth rounded portion and a flat portion at an angle, providing comfortable grip access from multiple directions while maintaining the open structure that prevents ligatures
2Adaptability or versatility
If grab bars are designed for vertical applications only, then they can be simplified, but they cannot be used in horizontal installations where ligature risk also exists
Solution Approach 1:
The grab bar design is universal and can be installed in both vertical and horizontal orientations, with the open structure and drainage features functioning effectively in either configuration to prevent ligatures and manage water
3Object-affected harmful factors
If grab bars have closed structures, then they are structurally simple, but they trap water that promotes bacterial growth
Solution Approach 1:
The design extracts the water trapping problem by incorporating open gaps and drainage channels that actively channel water away from the gripping surface and mounting areas, preventing stagnation and bacterial growth
Solution Approach 2:
The drainage system utilizes the vertical dimension with inclined surfaces and downward-sloping channels that guide water away from critical areas, adding a gravitational drainage dimension to the otherwise simple bar structure
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 design effectively prevents ligature formation and supports safe self-assistance in various orientations while promoting drainage and reducing bacterial growth, enhancing safety in institutional settings.
Implementation Method 1
curved side channels for drainage of water that extend from an inner edge of the flange toward a central axis of the elongate body
Implementation Method 2
The top surface of the top end cap is inclined downward at an angle of greater than thirty degrees from a direction perpendicular to the rear surface of the elongate body
Data Source
AI summary
A ligature-resistant grab bar provides ligature-proof self-support of persons at toilets, showers, baths or other locations where persons require self-support assistance. The ligature-resistant grab bar includes an elongate body that may be an extruded member, which has a flange disposed at a planar rear surface extending from the elongate body on a first side and a second side of the elongate body. The sides of the elongate body have curved side channels for drainage of water that extend from an inner edge of the flange toward a central axis of the elongate body to a gripping profile forming a front of the elongate body, which may be circular or elliptical in cross-section, of a front half of the gripping profile. The ligature-resistant grab bar also includes a bottom end cap and a top end cap attached to the ends of the elongate body.