Pressure Washer Attachment Rolling Element Reduces Operator Fatigue
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Solution Overview
Problem
Pressure washers cause operator fatigue due to the resistance feedback from high-pressure water jets, making it difficult to maintain control while cleaning secondary surfaces.
Innovation Solution
A pressure washer attachment featuring a rolling element and guide posts that allow the nozzle to move freely over a secondary surface, reducing friction and effort required to guide the nozzle, while maintaining contact with the surface to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pressure washer is used to clean secondary surfaces, then cleaning effectiveness is improved, but operator fatigue increases due to resistance feedback from high-pressure water jets
Solution Approach 1:
A rolling element is introduced as an intermediary between the nozzle and the secondary surface. The rolling element rotates as it moves along the surface, mediating the interaction between the high-pressure water jet and the surface. This reduces the direct resistance feedback to the operator while maintaining effective cleaning contact.
Solution Approach 2:
The rolling element provides dynamic movement along the secondary surface, allowing the nozzle to adapt to surface contours. The rolling motion converts linear resistance into rotational movement, reducing the effort required by the operator to maintain control while preserving cleaning effectiveness.
2Ease of operation
If the nozzle is held firmly to maintain control, then operator control is improved, but friction and effort to guide the nozzle increase
Solution Approach 1:
The rolling element serves as a mediator that reduces friction between the nozzle assembly and the secondary surface. Instead of the nozzle directly contacting and frictioning against the surface, the rolling element rotates smoothly, converting sliding friction into rolling friction, thereby reducing guidance effort while maintaining control.
Solution Approach 2:
The sliding friction mechanism is replaced with a rolling motion mechanism. The rolling element substitutes the direct mechanical friction contact with a rotational contact system, reducing the force required to guide the nozzle along the surface while preserving operational control.
3Force
If the nozzle moves freely over the surface, then friction is reduced, but contact with the surface may be lost causing damage
Solution Approach 1:
The rolling element acts as a protective intermediary between the nozzle assembly and the secondary surface. It maintains continuous contact with the surface through its rotation, ensuring the nozzle stays properly positioned for cleaning while preventing direct damaging contact between the nozzle and the surface.
Solution Approach 2:
The rolling element provides dynamic contact maintenance through its rotation. As it rolls along the surface, it continuously re-establishes contact between the nozzle assembly and the surface, preventing loss of contact that could cause damage, while the rolling motion itself minimizes friction.
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 attachment reduces operator fatigue by minimizing the effort needed to control the spray nozzle, allowing for effective cleaning with reduced friction and damage to the secondary surface.
Implementation Method 1
A rolling element is provided and extends between the first and second walls, and is also substantially oppositely disposed to the third wall
Data Source
AI summary
Embodiments of the invention relate to an attachment for a pressure washer to facilitate cleaning of secondary surfaces. The attachment includes a body with three walls, two of the walls are in a parallel relationship and a third wall is substantially perpendicular to the two parallel walls. A single rolling element is in communication with the two parallel walls and spaced apart from the third wall. The single rolling element may be applied to a secondary surface so that the attachment rolls along the surface thereof while liquid is ejected from the pressure washer to clean the secondary surface.