Removable Mulcher Assembly for Year-Round Vacuum Use
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Solution Overview
Problem
Conventional shredders for leaves and yard waste are large, expensive, and limited to seasonal use, making them inconvenient for year-round utility.
Innovation Solution
A mulcher with a removable shredder assembly that can be used for shredding leaves and yard waste, and can be converted into a conventional utility vacuum, allowing for more versatile and cost-effective use throughout the year.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional shredder is used for leaves and yard waste, then shredding capability is achieved, but the device becomes large and expensive
Solution Approach 1:
The shredder is divided into separate modular components: a removable shredder assembly that can be detached from the vacuum cleaner body. This segmentation allows the shredding function to be integrated when needed while keeping the main vacuum unit compact for year-round storage and other uses.
Solution Approach 2:
The vacuum cleaner is designed to perform multiple functions: it can operate as a standard vacuum cleaner for indoor use throughout the year, and when the shredder assembly is attached, it becomes a leaf and yard waste shredder for seasonal outdoor use. This multi-functionality eliminates the need for separate dedicated shredding equipment.
2Adaptability or versatility
If a dedicated shredder is purchased for yard waste, then shredding function is provided, but the product is limited to seasonal use
Solution Approach 1:
The vacuum cleaner serves dual purposes: as a standard vacuum for year-round indoor cleaning and as a leaf shredder when the shredder assembly is attached during fall season. This extends the usage period from seasonal to year-round, maximizing the value and utility of the equipment.
Solution Approach 2:
The shredder assembly can be detached and stored when not in use, allowing the vacuum cleaner body to be used for other purposes throughout the year. The shredding capability is recovered and utilized only when needed, optimizing resource utilization across different time periods.
3Productivity
If conventional shredders are used, then leaf shredding is achieved, but the device becomes large and inconvenient
Solution Approach 1:
The shredder assembly is designed as a compact, removable module that attaches to the vacuum cleaner. This segmented design maintains adequate shredding capability while minimizing the overall size and improving maneuverability compared to large conventional standalone shredders.
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 mulcher provides a convenient and cost-effective solution for shredding leaves and yard waste, enabling the device to be used during all seasons while minimizing the need for separate equipment, thus increasing its overall utility and reducing storage requirements.
Implementation Method 1
The shredder assembly includes a shredding blade designed to efficiently cut and shred leaves
Implementation Method 2
optimized shredding blade design
Implementation Method 3
a motor positioned in the base unit below the shredder assembly
Data Source
AI summary
The disclosed mulcher has a base unit and a shredding blade in a removable assembly. Two different embodiments are disclosed. In both embodiments, shredded material is removed from air exiting the shredding blade before it reaches an exhaust port. In one embodiment, the material is removed by a filter. In the other embodiment, walls are arranged so that debris must double back against high-speed airflow leaving the shredding blade before exiting the unit. The shredding blade can be mounted in front of and on the same shaft as an air impeller, with the back surface of the shredding blade being supported by the impeller. In another embodiment, the air impeller and the shredding blade are carried in assemblies that are separable from each other and are each separately attachable to a base unit. A detachable power module and a detachable blower are also shown. The power module has a safety switch that disables the power module when it is removed. A power receptacle is shown with a switch that alternately switches power to either the shredder motor or to the power receptacle, but not to both simultaneously.