Snap-Lock Viewing Port for Air Filter Housing Inspection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing air filter housings for motor vehicles require time-consuming access for inspection, often involving removal of the filter housing and risk of lost or misplaced screws, which can compromise the seal and lead to hot air, dust, and vapors entering the filter, reducing airflow and shortening the filter's life.
Innovation Solution
A clear cover assembly with a gasket featuring a first channel and a second channel configured to receive an inwardly extending housing flange, forming a snap lock for easy installation and removal, ensuring a secure seal and minimizing tool requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws are used to fasten the viewing port to the filter housing, then the viewing port can be securely attached, but the screws may be misplaced, dropped into the engine or lost, and the removal and installation process becomes time consuming
Solution Approach 1:
The patent removes the screws and screwdrivers from the system by replacing the screw-fastening mechanism with a snap-fit mechanism. The viewing port is retained on the filter housing through elastic retention and friction fit, eliminating the need for separate fastening components that can be lost or misplaced.
Solution Approach 2:
The viewing port incorporates self-retaining features including an elastic retention lip that flexes to engage with the housing opening and a friction fit between the viewing port flange and housing surface. This self-service mechanism allows the viewing port to secure itself without external fasteners, enabling quick removal and reinstallation by simply pushing the viewing port into place.
2Reliability
If screws are used to fasten the viewing port, then the viewing port can be attached, but the screws and screwdrivers can be misplaced or lost
Solution Approach 1:
The patent merges the viewing port body with its retention mechanism by integrating the retention lip and friction fit features directly into the viewing port structure. This consolidation eliminates separate screws and screwdrivers, reducing the number of components that can be lost and simplifying the user's tool requirements to just the viewing port itself.
3Reliability
If screws are used to fasten the viewing port, then the viewing port can be secured, but the screws may provide an uneven seal allowing hot engine air, dust, engine vapors and water to be sucked into the filter housing
Solution Approach 1:
The patent applies local quality by creating a continuous sealing surface through the friction fit between the viewing port flange and the housing opening. This uniform contact surface distributes the sealing pressure evenly around the entire perimeter, unlike discrete screw holes that create localized stress points and potential leakage paths. The elastic retention lip also provides localized sealing at the engagement point with the housing.
4Reliability
If screws are used to fasten the viewing port, then the viewing port can be attached, but the screws may crack the cover at the location of the fasteners, risking breakage of the cover and uncontrolled entry of engine air
Solution Approach 1:
The patent extracts the screws and their associated mounting holes from the design, eliminating the source of stress concentration that causes cracking. The snap-fit mechanism engages with the housing opening without requiring holes through the cover, thereby preserving the structural integrity of the viewing port cover and preventing crack initiation at fastener locations.
Data Source
AI summary
A cover for an air filter housing of a motor vehicle has a clear cover with a gasket having a first channel enclosing an outer periphery of the cover. The gasket has a second channel configured to receive an inwardly extending flange on the air filter housing which flange extends around a viewing opening in the housing. The gasket has an end portion connected to the second channel that is inwardly and downwardly inclined to allow the end portion to slip over the flange and form a snap lock with the flange retaining the gasket and cover over the opening in the air filter housing. The end portion has a downwardly inclined edge below the flange, so the cover and gasket can be removed from the housing by pulling on a pull tab extending from the gasket.