Wet/Dry Vacuum Filter Assembly With Self-Sealing Elastic Mount
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Solution Overview
Problem
Existing vacuum cleaner filter systems for wet/dry vacuum cleaners are cumbersome to use, requiring separate retaining mechanisms that can be lost or misplaced, and often result in filter dislodgment during handling, leading to leakage and damage.
Innovation Solution
A filter assembly with a cap and annular end ring made of flexible material, which seals automatically to the vacuum appliance without the need for additional retaining mechanisms, using a deformable cap that expands to fit over the mounting post and contracts to secure the filter in place, ensuring quick replacement and secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate retaining mechanism (such as a cage stem and nut combination) is used to attach the filter to the vacuum appliance, then the filter can be securely retained during operation, but the device complexity increases and the retaining mechanism can be lost or misplaced during filter replacement
Solution Approach 1:
The patent removes the separate retaining mechanism (cage stem and nut combination) from the system entirely. The filter assembly is designed to attach directly to the filter cage without requiring any additional retaining components, thereby eliminating the complexity and potential for loss of separate parts while maintaining secure retention through the integrated elastic mounting cap design
Solution Approach 2:
The filter assembly integrates the mounting cap directly with the filter element, combining functions that were previously separate (filter filtration and filter retention). This merging eliminates the need for separate retaining mechanisms while ensuring secure attachment through the elastic mounting cap that directly engages with the filter cage
2Stability of the object's composition
If a rigid mounting structure is used to support the filter, then the filter remains stable during operation, but the ease of operation decreases due to difficulty in quick replacement
Solution Approach 1:
The mounting cap is designed with elastic material that allows it to dynamically adapt during installation and removal. The elastic properties enable the cap to be easily compressed for quick installation and to maintain stable engagement during operation, providing both ease of operation and mounting stability without requiring complex mechanisms
Solution Approach 2:
The elastic mounting cap changes its physical state between compressed (during installation/removal) and relaxed (during operation). This parameter change allows the same structure to provide both ease of operation during replacement and stable retention during vacuum operation, eliminating the need for separate rigid and flexible components
3Reliability
If additional retaining mechanisms are used to prevent filter dislodgment, then the filter remains secure during handling, but the loss of substance increases due to potential loss of retaining parts
Solution Approach 1:
The patent eliminates separate retaining mechanisms entirely, removing the source of part loss. The filter assembly is designed with an integrated elastic mounting cap that provides secure retention without requiring any separate nuts, bolts, or clips that could be lost during filter replacement or handling
Solution Approach 2:
The elastic mounting cap is designed to be self-retaining, using its own elastic properties to secure the filter assembly to the filter cage. This self-service design eliminates the need for separate retaining parts that could be lost, as the mounting cap itself provides both the attachment and retention functions through its elastic deformation and recovery
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 allows for easy and quick filter replacement, secure attachment, and automatic sealing, preventing leakage and damage during normal operation and handling, while being retro-fittable to existing vacuum units without the need for new appliances.
Implementation Method 1
the cap and the end ring are comprised of an flexible material; the opening in the cap has an uncompressed diameter smaller than the diameter of a portion of the mounting post, such that, during assembly, the opening expands in diameter to fit over a portion of the mounting post, and thereafter contracts in diameter so as to retain the filter assembly over the filter cage
Data Source
AI summary
Vacuum cleaner filters, in particular replaceable vacuum cleaner filters suitable for both wet and wet/dry type vacuum cleaners are disclosed, as well as vacuum cleaner systems incorporating the use of such filters, and methods for their use. The filters include a filter element arranged in a closed circumferential, cylindrically-shaped path, a top end cap having a central orifice capable of constricting a post on a vacuum filter cage, and optionally a molded end ring oppositely-spaced from the top end cap for engagement with the lower motor housing of a vacuum cleaner.