Pivoting Extractor Nozzle for Alternating Cleaning Stroke Pressure
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Solution Overview
Problem
Existing wet extractors lack an efficient mechanism for alternating the support and pressure distribution during cleaning strokes, which affects the effectiveness of fluid delivery and recovery, as well as the engagement with the surface.
Innovation Solution
The extractor features a foot assembly with wheels at the rear and agitators at the front, a fluid delivery system, and a nozzle extension with a pivot mechanism that allows for alternating positions during forward and rearward movements, enabling effective fluid distribution and recovery by varying the pressure and engagement with the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the foot assembly is moved in alternating forward and rearward movements, then the engagement and pressure distribution during cleaning strokes is improved, but the device complexity increases due to the pivot mechanism
Solution Approach 1:
The extension is made pivotally movable relative to the foot assembly, allowing it to dynamically adjust between engaged and disengaged positions during forward and rearward strokes. This dynamic configuration enables the nozzle to automatically engage with the surface during cleaning strokes while disengaging during return strokes, improving cleaning performance without requiring complex external actuation mechanisms.
2Productivity
If the extension is pivotally movable to engage with the surface, then the fluid delivery and recovery efficiency is improved, but the reliability decreases due to potential positional instability
Solution Approach 1:
The pivotal extension is designed to periodically engage with and disengage from the surface in synchronization with the alternating forward and rearward movements of the foot assembly. During each rearward cleaning stroke, the extension pivots to engage with the surface for fluid delivery and recovery; during each forward return stroke, it pivots to disengage. This periodic engagement pattern ensures consistent fluid extraction efficiency while maintaining reliable positional stability through the natural rhythm of the cleaning operation.
Data Source
AI summary
An extractor comprises a foot assembly supported by at least one wheel at a rearward portion thereof and at least one rotatable agitator at a forward portion thereof, a fluid delivery system, a fluid recovery system and an extension with a first end aligned with an inlet for an extraction path and a second end in register with a surface to be cleaned. The foot assembly can be traversed over the surface to be cleaned in alternating forward and rearward movements. Movement of the foot assembly in a rearward direction supports the forward portion of the foot assembly on the extension in a first position and the at least one agitator and movement of the foot assembly in a forward direction shifts support of the forward portion of the foot assembly off of the extension in a second position.