Cup-Shaped Oil Filter With Integrated Thread Connector
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Solution Overview
Problem
Existing oil filters for internal combustion engines require two pairs of threads, leading to leakage issues and increased costs due to the necessity of a threaded nipple, which complicates the mounting process and reduces the outlet diameter.
Innovation Solution
A replaceable liquid filter design featuring a cup-shaped housing with a concentrically disposed outlet and inlet, a filter element, and a releasable connector that extends beyond the filter's contour for attachment to a mating part, eliminating the need for a threaded nipple and incorporating a backflow check valve to prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a threaded nipple is used to connect the oil cartridge filter to the cylinder head, then the filter can be securely mounted, but the complexity of the device increases and the outlet diameter is reduced
Solution Approach 1:
The patent removes the threaded nipple from the system by integrating the threading function directly into the filter housing. The housing now includes an internal thread that directly engages with the cylinder head's external thread, eliminating the need for the separate threaded nipple component and reducing overall device complexity.
Solution Approach 2:
The patent merges the functions of the housing and the threading mechanism into a single integrated component. The housing incorporates the internal thread as an integral feature, combining the structural housing function with the connection function, thereby reducing the number of separate parts needed.
2Reliability
If a threaded nipple is used for mounting the filter, then connection is achieved, but leakage problems increase due to additional thread pairs
Solution Approach 1:
The patent eliminates the threaded nipple that created leakage issues by directly integrating the thread into the housing. This reduces the number of thread pairs from two to one, thereby reducing the potential leakage paths while maintaining connection capability.
3Reliability
If a threaded nipple is used to connect the filter, then mounting is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple functions into the housing component, including the threading function. This integration eliminates the need to manufacture and assemble a separate threaded nipple, thereby reducing manufacturing steps and overall cost while maintaining the mounting function.
4Reliability
If a threaded nipple is used, then connection to cylinder head is achieved, but the outlet diameter for filtered liquid is reduced
Solution Approach 1:
The patent removes the threaded nipple component that was occupying space within the filter assembly. By eliminating this component and integrating the thread directly into the housing, the available cross-sectional area for the outlet opening is maximized, increasing the outlet diameter.
Data Source
AI summary
A replaceable liquid filter, particularly for the lubricating oil of an internal combustion engine, having a substantially cup-shaped housing with a concentrically disposed outlet opening for the filtered liquid and at least one inlet opening for the liquid to be filtered and a filter element sealingly disposed between the inlet opening and the outlet opening. The housing is connected to a top plate, and the top plate is connected to an end plate. A connector for releasably coupling the replaceable liquid filter to a mating part is disposed concentrically in the region of the cover plate, such that the connector extends axially beyond the contour of the replaceable liquid filter.