Integral Filter Endcap Seal for Leak-Resistant Assembly
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Solution Overview
Problem
Existing canister style filter systems experience leakage issues due to the use of separate seals like O-rings, which are prone to leaks despite securing mechanisms such as wing nuts.
Innovation Solution
An integrated seal member with a top annular mounting portion, sealing portion, and connecting portion is used, featuring multiple sealing lobes and conical surfaces to provide sealing redundancy and facilitate assembly, allowing dirty fluid to flow through apertures for filtration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate O-ring seal is used between the base and canister, then the filter system can be assembled with simple components, but leakage occurs at the seal interface
Solution Approach 1:
The patent combines the seal member with the filter element into a single integrated assembly. The seal member is positioned at the radially outer periphery of the filter element and is retained by the end cap, creating a unified structure that eliminates the need for separate seal installation and ensures reliable sealing at the base-canister interface.
2Reliability
If multiple sealing features are integrated into the seal member, then sealing redundancy is improved, but the manufacturing complexity of the seal member increases
Solution Approach 1:
The seal member is divided into multiple functional segments including a first sealing feature for sealing against the base, a second sealing feature for sealing against the canister, and a third sealing feature for sealing against the filter element. This segmentation allows each sealing feature to be optimized for its specific sealing interface while being manufactured as an integrated unit.
3Ease of operation
If the seal member is integrated with the filter element, then assembly is simplified and leakage is prevented, but the seal member must withstand higher structural loads
Solution Approach 1:
The seal member is constructed from elastomeric material that provides both sealing functionality and structural integrity. The elastomeric material allows the seal member to flex and conform to mating surfaces while withstanding the structural loads imposed during assembly and operation, enabling the integrated design to succeed.
Data Source
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AI summary
An integrated seal member (300a) includes an at least partially annular body defining a longitudinal axis (216a), a radial direction (218a), and a circumferential direction (217). The at least partially annular body includes a top annular mounting portion (324c), a sealing portion (302a) including at least one top sealing feature (343) and at least one bottom sealing feature (336), and a connecting portion (318a) that extends at least radially outwardly from the top annular mounting portion (324c) to the sealing portion (302a).