Universal Filter Cartridge With Snap-Fit Cap and Media-Retaining Outlet
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Solution Overview
Problem
Conventional water pitcher filtration cartridges face issues with filter media particles escaping through outlets and inlets, leading to contamination and increased manufacturing costs due to the need for additional screens and assembly methods like sonic welding or chemical adhesives.
Innovation Solution
The water filter cartridge design features a body with outlet openings sized to retain filter media particles without screens, a cap secured by snap-fit engagement, and a radially projecting seal flange for enhanced funnel engagement, reducing manufacturing costs and assembly complexity while preventing media escape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screens are added at the outlet and inlet to prevent filter media escape, then media retention is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The outlet openings are designed with specific dimensional characteristics (smaller size, specific geometry) that differ from conventional outlets. This local modification of the outlet structure enables media retention without requiring additional screens, as the outlet openings themselves are configured to prevent media passage while allowing water flow.
Solution Approach 2:
The screen component is completely removed from the cartridge design. Instead of adding screens to prevent media escape, the invention eliminates the need for screens by redesigning the outlet openings to inherently retain media through their specific dimensional characteristics.
2Reliability
If screens are added at the outlet and inlet to prevent filter media escape, then media retention is improved, but manufacturing cost increases
Solution Approach 1:
The screen component is completely removed from the cartridge design. Instead of adding screens to prevent media escape, the invention eliminates the need for screens by redesigning the outlet openings to inherently retain media through their specific dimensional characteristics, thereby reducing material and assembly costs.
Solution Approach 2:
The outlet opening dimensions are modified to specific parameters that enable media retention. By changing the size and geometry of the outlet openings to precise specifications, the design achieves media retention functionality without requiring additional screen components.
3Strength
If sonic welding or chemical adhesives are used to secure the cap to the body, then assembly strength is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The cap securing mechanism is simplified by removing the need for sonic welding equipment or chemical adhesive applications. The cap is retained on the body through a friction-fit relationship created by complementary geometric features, eliminating complex assembly processes and associated costs.
Solution Approach 2:
The cap and body features are designed to automatically secure the cap to the body through their geometric compatibility. The friction-fit relationship creates self-retaining engagement without requiring external fastening mechanisms, welding equipment, or adhesive application processes.
4Reliability
If the cartridge design is optimized for specific pitcher funnels, then sealing performance is improved, but adaptability to various pitchers decreases
Solution Approach 1:
The seal flange is designed with a generic configuration that can accommodate multiple pitcher funnel types. By creating a standardized seal flange geometry that interfaces with common pitcher funnel openings, the cartridge achieves broad compatibility across different pitcher models while maintaining effective sealing through the flange's contact surfaces.
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 design ensures effective filtration performance without media escape and reduced manufacturing costs, with a snap-fit assembly and enhanced sealing, accommodating various pitcher funnel configurations.
Implementation Method 1
a cap portion of the cartridge housing is secured to a body portion of the housing solely by a snap-fit engagement
Implementation Method 2
After treatment in the cartridge through gravity flow, the water exits a cartridge outlet
Data Source
AI summary
A water filter cartridge is provided, including a body for receiving a supply of filter media, the body having an open upper end and an outlet having a plurality of outlet openings, and a cap configured for sealingly engaging the upper end of the body. The supply of media directly contacts an inside surface of an outlet of the body, and the outlet openings being dimensioned for retaining the media despite direct contact with the inside surface.