Water Filter Cartridge Locking Seal for Easy Replacement
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Solution Overview
Problem
Conventional water filter pitcher systems face challenges in ease of cartridge replacement and disposal, leading to plastic waste generation, while balancing effective sealing and user-friendly design.
Innovation Solution
A water filter pitcher system featuring both disposable and reusable cartridges with a common engagement mechanism using radially projecting pins and helical threads, along with annular seals and tactile feedback for secure fitting, and integral gripping tabs for easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If disposable filter cartridges are used, then effective filtration is achieved, but plastic waste is generated
Solution Approach 1:
The cartridge is divided into a reusable housing and a disposable filter element. The housing contains the filter element and can be refilled with new filter cartridges, separating the permanent structural components from the consumable filtering medium.
Solution Approach 2:
Instead of discarding the entire cartridge housing, only the filter element is discarded after use. The housing is recovered and reused multiple times by removing and replacing the internal filter element, significantly reducing plastic waste.
2Reliability
If a secure sealing mechanism is implemented, then effective sealing is achieved, but cartridge replacement difficulty increases
Solution Approach 1:
The O-ring seal is pre-installed on the cartridge housing in the correct position and orientation. This preliminary placement ensures proper sealing engagement with the reservoir without requiring the user to manually position or adjust the seal during replacement.
Solution Approach 2:
The cartridge's own structure, including the integrated O-ring and positioning features, automatically ensures proper sealing and alignment when inserted into the reservoir. The design self-verifies correct installation through tactile feedback and mechanical engagement.
3Reliability
If a specialized engagement mechanism is used, then secure fitting is achieved, but manufacturing complexity increases
Solution Approach 1:
The cartridge housing serves multiple functions: it contains the filter element, provides structural support, ensures proper positioning in the reservoir through integrated features, and maintains the seal. This multi-functionality eliminates the need for separate components for each function, simplifying manufacturing.
Data Source
AI summary
A water treatment system includes a main container defining an interior and having an upper edge, a reservoir removably insertable into the interior and located upon the upper edge, the reservoir defining a cartridge seat including a plurality of holes in communication with a helical thread, and an annular landing vertically depending from the thread, a filter cartridge including a cap associated with a sump body and having a filter media in the sump body, the cap having a plurality of radially outwardly projecting pins constructed and arranged for engaging the holes and the helical thread, an annular seal disposed externally on the sump body and spaced below the cap. The filter cartridge and the cartridge seat are configured so that upon the cap pins engaging the helical thread, upon reaching a fully engaged position of the cap in the thread, the seal is compressed against the annular landing.