Filter Assembly Sealing Member Retention With Snap-Fit Retainer Loop
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Solution Overview
Problem
Conventional filter assemblies often experience leakage due to loosely positioned sealing members, which can come off during installation or removal, leading to fluid contamination and damage in internal combustion engine systems.
Innovation Solution
A retainer loop snap-fit mechanism is employed on a gasket retainer to securely position a sealing member around an outer curved surface, enhancing retention force and preventing dislodgment, thereby ensuring a reliable fluid seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sealing member is positioned loosely around the filter assembly, then the installation and removal process is simple, but the sealing member can easily come off during installation or removal, causing leakage
Solution Approach 1:
The retainer is divided into multiple retainer arms that can independently engage with the sealing member. Each retainer arm acts as a separate retention element, providing distributed securing points around the sealing member while maintaining overall structural integrity. This segmentation allows the sealing member to be securely held without requiring complex overall structures.
Solution Approach 2:
The retainer structure serves as an intermediary component between the filter assembly housing and the sealing member. It provides a mechanical interface that positively engages the sealing member through retainer arms with ledges, preventing direct contact and potential dislodgment while maintaining the sealing function. The retainer acts as a mediator that secures the sealing member in place during installation and removal operations.
2Reliability
If the sealing member is securely retained, then leakage is prevented, but the structure becomes more complex with additional retainer components
Solution Approach 1:
The retainer structure performs multiple functions: it secures the sealing member in place, provides structural support, and guides the sealing member during installation. The retainer arms with ledges simultaneously provide retention and positioning functions, eliminating the need for separate positioning and retention components. This multi-functionality reduces overall device complexity while maintaining reliable sealing.
Solution Approach 2:
The retainer arms are nested within the filter assembly housing structure, with the retainer itself positioned within the housing and the sealing member positioned within the retainer. This nested arrangement allows the retainer components to be integrated into the existing filter assembly geometry, minimizing additional space requirements and reducing structural complexity while providing secure sealing member retention.
Data Source
AI summary
A filter assembly comprises a filter housing defining an internal volume, a filter element positioned within the internal volume, and a gasket retainer. An outer edge of the gasket retainer is coupled to a top end of the filter housing, and an inner rim thereof forms a gasket retainer ledge. The filter assembly further comprises a retainer loop comprising a retainer loop main body. A plurality of retainer arms extend axially from the retainer loop main body towards the gasket retainer. Each of the plurality of retainer arms comprise a retainer arm ledge extending radially towards the retainer loop main body and snap-fit to the gasket retainer ledge. A retainer loop sidewall extends from the main body away from the gasket retainer. An outer surface of the retainer loop sidewall defines a curvature. A sealing member is removably positioned around the outer surface of the retainer loop sidewall.