Vacuum Cleaner Nozzle with Rotatable Rear Inlet for Backstroke Pickup
Solution Overview
Problem
Existing vacuum cleaners often struggle with effectively picking up debris during the backstroke of the nozzle assembly, leading to user fatigue and incomplete cleaning due to the design limitations of most vacuum cleaners.
Innovation Solution
A vacuum cleaner nozzle assembly with a separate rear-facing suction inlet that rotates to facilitate effective debris collection during both forward and backward strokes, combined with a front-facing suction inlet that adjusts accordingly to optimize airflow and debris pickup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single front-facing suction inlet is used, then the vacuum cleaner can effectively pick up debris during the forward stroke, but it cannot effectively collect debris during the backstroke
Solution Approach 1:
The suction inlet is divided into two separate inlets: a front-facing suction inlet and a rear-facing suction inlet. Each inlet is positioned to face a different direction and is activated during different strokes. The front-facing inlet handles forward stroke debris collection, while the rear-facing inlet handles backstroke debris collection, allowing the system to segment the cleaning function by direction.
Solution Approach 2:
The system dynamically switches between front-facing and rear-facing suction inlets based on the direction of movement. During forward stroke, the front-facing inlet is open and the rear-facing inlet is closed. During backstroke, the front-facing inlet is closed and the rear-facing inlet is open. This dynamic switching enables the vacuum cleaner to adapt to different movement directions and maintain effective debris collection throughout the entire cleaning cycle.
2Productivity
If the nozzle assembly is pushed forward continuously, then debris can be collected during forward stroke, but user fatigue increases and backstroke debris is not collected
Solution Approach 1:
The dual inlet system ensures that useful action (debris collection) continues during both forward and backward strokes. By having the rear-facing inlet active during backstroke, the system eliminates the previously unproductive backward movement, converting it into an effective cleaning action. This continuity reduces the need for repeated passes over the same area, thereby reducing user fatigue while increasing overall cleaning coverage.
3Productivity
If a rotatable inlet system is implemented, then debris collection is improved during both strokes, but device complexity increases
Solution Approach 1:
Rather than implementing a complex rotatable inlet system, the patent segments the suction function into two fixed inlets facing opposite directions. This segmentation approach achieves the same goal of bidirectional debris collection without requiring mechanical rotation or complex switching mechanisms, thereby maintaining simplicity while improving productivity.
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 ensures efficient debris collection on both the forward and backward strokes, reducing user fatigue and improving the overall cleaning effectiveness by providing a consistent suction path regardless of the nozzle's direction.
Implementation Method 1
the suction chamber can rotate about the pivot axis
Implementation Method 2
The rotatable inlet is configured to rotate between a first state that allows air to pass through the rotatable inlet and a second state that blocks the passage of air through the rotatable inlet
Implementation Method 3
a motor configured to draw air through the nozzle assembly and into the waste receptacle
Data Source
AI summary
A nozzle assembly that is designed for use on a vacuum cleaner includes a pivotable outlet configured for engagement with a suction tube of the vacuum cleaner and a suction chamber coupled to the pivotable outlet via a pivot axis such that the suction chamber can rotate about the pivot axis. The suction chamber includes a rotatable inlet positioned along a rear-facing edge of the suction chamber. The rotatable inlet is configured to rotate between a first state that allows air to pass through the rotatable inlet and a second state that blocks the passage of air through the rotatable inlet.