Asymmetric Filter Element Socket Prevents Misalignment
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Solution Overview
Problem
Existing filter devices in hydraulic systems lack functional reliability due to the complexity of fluid routing and the inability to ensure that only compatible filter elements are used, which can lead to operational failures and economic damage.
Innovation Solution
A filter device with an asymmetrically shaped pipe socket and corresponding shape irregularities on the element receptacle and end cap, ensuring that only specifically designed filter elements can be aligned and engaged correctly, providing operational safety and preventing unsuitable elements from being used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a circular pipe socket is used for connecting filter elements, then the assembly is simple and manufacturing is easy, but the filter element can be rotated to incorrect positions and incompatible elements can be installed
Solution Approach 1:
The patent applies asymmetry by designing the pipe socket with a non-circular, asymmetric cross-sectional shape (e.g., oval, rectangular, or irregular polygon). This asymmetric geometry ensures that only filter elements with corresponding asymmetric connection pieces can be installed in the correct orientation, preventing rotation to incorrect positions and ensuring compatibility. The asymmetric shape creates a unique fit that guarantees proper alignment of fluid passages and sealing surfaces.
2Reliability
If shape irregularities are added to the pipe socket and end cap to ensure correct alignment, then only compatible filter elements can be used, but the manufacturing complexity increases
Solution Approach 1:
The asymmetric shape irregularities are integrated into the standard manufacturing processes for the pipe socket and end cap. By designing the asymmetric features as inherent geometric properties of the connection components rather than as separate added features, the patent maintains manufacturing simplicity while achieving the safety goal of ensuring only compatible elements can be installed.
3Reliability
If the pipe socket has a non-circular asymmetric outer contour, then correct alignment and anti-twist security are ensured, but the ease of assembly may be reduced
Solution Approach 1:
The asymmetric outer contour of the pipe socket provides inherent anti-twist security by creating a unique geometric interface that prevents rotation. The asymmetric shape acts as a mechanical key-lock system where the filter element connection piece can only be inserted in the correct orientation, automatically preventing torque and misalignment during assembly.
Data Source
AI summary
A filter device having at least one filter housing (1), in which at least one filter element (11) that defines a longitudinal axis can be received in the form of a filter cartridge which has on at least one end an end cap (19) forming an enclosure for the relevant end rim of the filter material (23, 25), which end cap, for fixing the position of the filter element (11) in its functional position, can be fixed on an element receiver (13) that interacts with the bottom part (7) of the filter housing (1), is characterized in that the element receiver (13) and the assigned end cap (19) of the filter element (11), on the parts thereof (17 and 15) coming into engagement with one another in the functional position of the filter element are provided with shape irregularities which are matched to one another which enable the engagement in a positional relationship directed towards one another.