Vacuum Filter Assembly With Self-Retaining Elastomeric Cap
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Solution Overview
Problem
Existing vacuum cleaner filter systems are cumbersome and time-consuming to replace, often requiring separate retaining mechanisms that can be lost or misplaced, and may result in filter dislodgment during use, leading to leakage and damage.
Innovation Solution
A filter assembly with a cap and annular end ring made of flexible material, featuring a centrally located opening that expands to fit over the mounting post and contracts to secure the filter in place, eliminating the need for separate retaining mechanisms and ensuring a secure seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a threaded stud and nut combination is used to retain the filter, then the filter can be securely attached, but the replacement process becomes time-consuming and the retaining mechanism can be lost or misplaced
Solution Approach 1:
The patent removes the separate retaining mechanism (nut and stud) from the filter assembly, extracting the retention function into the filter's own structure through the elastomeric cap that naturally secures to the mounting post
Solution Approach 2:
The filter assembly's elastomeric cap serves its own retention function without requiring external retaining components. The cap's elastic properties enable it to automatically secure to and release from the mounting post, making the filter self-retaining
2Strength
If a rigid cage structure is used to support the filter, then the filter is protected from collapse, but the overall device complexity increases
Solution Approach 1:
The patent replaces the rigid cage structure with a flexible elastomeric cap that provides sufficient support. The elastic material maintains filter shape and prevents collapse while being simpler in construction than a multi-ribbed rigid cage
3Reliability
If the filter is securely retained during operation, then leakage is prevented, but the filter becomes difficult to remove for cleaning or replacement
Solution Approach 1:
The elastomeric cap provides dynamic retention that adapts to operational forces, maintaining secure attachment during vacuum operation while allowing easy removal when needed. The elastic properties enable the cap to flex during installation and removal while maintaining seal integrity during use
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
Facilitates quick and effective replacement and cleaning of filters, maintains secure attachment during operation, and can be retro-fitted to existing vacuum appliances, reducing the risk of leakage and damage.
Implementation Method 1
the cap is made from an elastomeric material and has a shape that allows the cap to be deformed so that it fits over a mounting post of a filter cage
Implementation Method 2
deforming the mounting cap to cause the mounting projection to extend through the opening in the end cap and to cause the end cap to engage the mounting region of the mounting projection
Data Source
AI summary
Vacuum cleaner filters, in particular replaceable vacuum cleaner filters suitable for both dry and wet/dry type vacuum cleaners are disclosed, as well as systems incorporating the use of such filters and methods for their use. The filters include a plurality of adjacently positioned pleats 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 motor housing of a vacuum cleaner.