Filter Element Assembly That Prevents Rotational Insertion Damage

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Solution Overview

Problem

Existing filter devices face issues with damage to the filter element during insertion and removal from the filter housing due to rotational forces applied during assembly and disassembly.

Innovation Solution

A filter device with a filter element featuring a hollow cylindrical body and end plates, utilizing an assembly component that connects to the filter base housing through an interlocking mechanism allowing axial movement and free rotational freedom, ensuring the filter element remains stationary during assembly and disassembly, with interlocking elements and insertion ramps facilitating this connection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the filter element is inserted into and removed from the filter housing using conventional rotational assembly methods, then the assembly and disassembly process can be completed, but the filter element suffers damage and wear due to rotational forces

Engineering Contradiction:
Improveassembly and disassembly operationVSAvoidfilter element integrity
Core Design Contradiction:
Ease of operationVSStrength

Solution Approach 1:

The assembly component is divided into separate functional elements: an interlocking element for axial connection and a freely rotatable component for rotational movement. This segmentation allows the axial and rotational movements to be decoupled, preventing rotational forces from damaging the filter element during assembly and disassembly.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The assembly component acts as an intermediary between the filter element and the filter housing. It provides a mechanical interface that enables axial insertion and removal while allowing rotational freedom, thereby mediating the interaction to prevent direct rotational forces from being transmitted to the filter element.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Stability of the object's composition

If the filter element is securely fixed in the filter housing, then the filter element remains stable during operation, but the assembly and disassembly process becomes difficult and may damage the filter element

Engineering Contradiction:
Improvefilter element stabilityVSAvoidassembly and disassembly operation
Core Design Contradiction:
Stability of the object's compositionVSEase of operation

Solution Approach 1:

The connection system transitions from a static fixed connection to a dynamic system where the assembly component can rotate freely relative to the filter element. This dynamic capability allows easy assembly and disassembly while maintaining stability during operation through the interlocking element's axial connection.

Inventive Principle:
Principle #15Dynamics

3Ease of operation

If rotational movement is applied during assembly and disassembly, then the assembly component can be easily rotated for installation, but the filter element experiences rotational forces that cause damage and reduce lifespan

Engineering Contradiction:
Improveassembly component rotationVSAvoidfilter element lifespan
Core Design Contradiction:
Ease of operationVSDuration of action of stationary object

Solution Approach 1:

The assembly component is segmented into an interlocking element that provides axial connection and a freely rotatable portion that handles rotational movement. This segmentation isolates the rotational movement to the assembly component itself, preventing it from being transmitted to the filter element and thereby extending the filter element's lifespan.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The assembly component serves as a protective intermediary that absorbs and contains the rotational forces during assembly and disassembly operations. The freely rotatable design allows the assembly component to rotate without transmitting these forces to the filter element, thus protecting the filter element from wear and extending its operational life.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS20250345730A1Filter device having a filter element
Publication Date: 2025.11.13 MANN HUMMEL GMBH
  • US20250345730A1 patent drawing
  • US20250345730A1 patent drawing
  • US20250345730A1 patent drawing

AI summary

A filter device is provided with a filter element for filtering a fluid. The filter element has a filter medium body with an end plate arranged at an end face of the filter medium body in relation to a longitudinal axis of the filter medium body. A filter base housing receives the filter element. An assembly component for assembly and disassembly of the filter element in the filter base housing is connectable to the end plate and to the filter base housing by rotation about the longitudinal axis. The assembly component has interlocking elements. An interlocking counter element is arranged at the end plate. The interlocking elements may be brought into axial interlocking connection with the interlocking counter element, while enabling a free rotatability in rotational direction about the longitudinal axis. The interlocking counter element is a circumferential interlocking collar with insertion ramps for insertion of the interlocking elements.