Filter Flap with Displaceable Pivot Axis for Industrial Extraction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing filter cover systems for industrial extraction systems are cumbersome to use, as they require both hands to hold the loose cover after unscrewing, and the peripheral edge of the filter housing impedes the pivoting and placement of the filter flap, making it difficult to remove and replace the filter efficiently.

Innovation Solution

A filter flap with a link guide that allows it to pivot on one side and have a displaceable pivot axis, using profiled recesses and peripheral pins to create space for folding, enabling the flap to be used as a work support and facilitating easy removal and replacement without dismantling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a screw connection locking device is used for the filter cover, then the cover can be securely closed, but it becomes loose and requires both hands to hold after unscrewing, reducing ease of operation

Engineering Contradiction:

Improvesecure closureVSAvoidease of operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The locking device is segmented into a locking lever with locking elements that can independently engage with corresponding recesses in the housing, allowing the cover to remain supported on the housing even when unlocked, eliminating the need for both hands to hold it

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The filter flap serves its own function as a work support surface during filter replacement, eliminating the need for additional support structures and enabling single-handed operation

Inventive Principle:

Principle #25Self-service

2Shape

If a peripheral edge protrudes from the housing surface, then the housing structure is defined, but it impedes the pivoting and placement of the filter flap, making filter replacement difficult

Engineering Contradiction:

Improvehousing structureVSAvoidease of filter replacement

Core Design Contradiction:

ShapeVSEase of operation

Solution Approach 1:

The filter flap is designed to be removable from the housing in a direction perpendicular to the housing surface, allowing it to be pulled off and folded back without being impeded by the peripheral edge, thus solving the pivoting problem through dimensional movement

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Ease of operation

If the filter flap is removed completely for filter replacement, then access is achieved, but the flap must be held with both hands and set aside, reducing operational efficiency

Engineering Contradiction:

Improveaccess to filterVSAvoidoperational efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The filter flap is designed to remain attached to the housing via support elements during removal, serving dual purposes: providing access to the filter and acting as a work support surface, thereby eliminating the need for both hands and improving operational efficiency

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP3135362B1Locking system for a filter flap in an industrial extraction installation

Publication Date: 2020.06.17 NILFISK AS

Figure 1~2
Figure 3~4
Figure 5~6

AI summary

Filter flap (2) for closing a filter housing in an industrial extraction system (1), wherein the filter flap (2) can be fastened to the housing surface (14) by means of at least two locking means (3), wherein the filter flap (2) is arranged to pivot on one side on the housing surface (14) by means of a cam guide and has a movable pivot axis.