Spring-Biased Wheel Brush Mount for Low-Resistance Wheelchair Cleaning
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Solution Overview
Problem
Existing wheelchair cleaning devices are complex, costly, and increase rolling resistance, often requiring permanent alterations to the wheelchair, which are not economically viable or user-friendly.
Innovation Solution
A simple, removably attached brush with a dovetail mechanism that slides onto the brake arm of the wheelchair's wheellock assembly, using a spring to bias the bristles toward the wheel, providing effective cleaning without altering the wheelchair's design or increasing rolling resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing automatic cleaning devices are used, then wheel cleaning effectiveness is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The cleaning device is segmented into modular components: a brush assembly with bristles, a mounting bracket, and a simple attachment mechanism. This segmentation allows for simplified manufacturing while maintaining cleaning effectiveness, directly resolving the contradiction between productivity and device complexity.
Solution Approach 2:
The patent employs a simple, inexpensive brush design that can be easily replaced when worn. The use of basic materials and straightforward construction enables cost-effective production without compromising the core cleaning function, addressing both productivity and manufacturing cost concerns.
2Productivity
If existing cleaning devices are installed, then wheel cleaning capability is improved, but rolling resistance increases
Solution Approach 1:
The brush is designed to contact only the specific portion of the wheel that requires cleaning, with bristles positioned to engage the wheel tread locally. This localized approach minimizes the contact area and resulting friction, thereby reducing rolling resistance while maintaining effective cleaning capability.
3Reliability
If permanent alterations are made to the wheelchair, then device stability is improved, but ease of installation and user-friendliness worsen
Solution Approach 1:
The mounting system transitions from static permanent installation to a dynamic, adjustable attachment mechanism. The bracket can be securely fastened to the wheelchair frame using standard attachment points, providing stable operation during use while allowing easy removal and reinstallation, thus resolving the contradiction between reliability and ease of operation.
4Productivity
If complex cleaning devices are used, then cleaning effectiveness is improved, but ease of manufacture and economic viability worsen
Solution Approach 1:
The design employs standard brush dimensions, common mounting hardware, and conventional materials that can be sourced and manufactured using existing industrial capabilities. By selecting parameters that align with standard manufacturing practices, the device achieves effective cleaning while remaining economically viable and easy to produce.
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 is cost-effective, easy to install and maintain, and does not add noticeable rolling resistance, allowing users to clean their wheelchair wheels efficiently without requiring special tools or training.
Implementation Method 1
A spring has a first end abutting the back end of the main housing and an opposing second end abutting the stop plate of the body member
Implementation Method 2
the bristles are facing the rear wheel and the spring biases the bristles toward the rear wheel
Implementation Method 3
a brush that attaches to a vertical rearwardly located post of an armrest of a wheelchair wherein the brush acts upon and cleans a main wheel
Data Source
AI summary
A wheel brush for a wheelchair has a brush assembly that is slidably disposed within a main housing and biased therein via a spring. A brush head is held within one end of the brush assembly so that a portion of the bristles of the assembly extend beyond an open end of the main housing. The device is attached to a brake arm of the wheelchair via a mount member that has a channel such that the brake arm is received within the channel. The wheellock assembly pushes the device toward a rear wheel of the wheelchair such that the bristles engage the wheel and brush dirt off the wheel as the wheelchair rolls being biased thereonto by the spring. The mount member acts as the brake arm for the wheelchair.