Hand-held Power Tool Filter Carrier Separable Mounting

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Solution Overview

Problem

Existing hand-held power tools lack a convenient and secure method for separating and replacing filter carriers, which are essential for preventing dust and material particles from entering the tool's housing, especially during maintenance or when the filter becomes clogged.

Innovation Solution

A filter carrier system that is easily separable from the hand-held power tool, featuring a filter carrier element with receiving openings for filter elements, and fastening elements that allow for positive and/or non-positive engagement with the tool's securing elements, enabling manual actuation without tools and ensuring secure attachment along the housing axis or transversely, with elastic elements for biasing and snap-lock mechanisms for secure fit.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the filter carrier is made permanently integrated into the hand-held power tool, then the protection against dust and material particles is reliable, but the ease of replacement and maintenance deteriorates

Engineering Contradiction:
Improveprotection against dust and material particlesVSAvoidease of replacement and maintenance
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The filter carrier is designed as a separable component that can be detached from the hand-held power tool. The housing is divided into a first housing part and a second housing part, with the filter carrier arranged between them, allowing the filter carrier to be removed independently for maintenance while maintaining secure attachment during operation through positive engagement mechanisms.

Inventive Principle:
Principle #1Segmentation

2Ease of operation

If the filter carrier is made easily separable from the hand-held power tool, then the ease of replacement and maintenance is improved, but the security of attachment and protection deteriorates

Engineering Contradiction:
Improveease of replacement and maintenanceVSAvoidsecurity of attachment and protection
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The filter carrier is pre-equipped with fastening elements such as latching mechanisms, clips, or snap-fit features that automatically engage with corresponding securing elements on the housing parts when the filter carrier is installed. This preliminary configuration of engagement features ensures that secure attachment is achieved automatically during the installation process without requiring additional steps.

Inventive Principle:
Principle #10Preliminary action

3Reliability

If complex fastening mechanisms are used to secure the filter carrier, then the security of attachment is improved, but the device complexity and ease of operation deteriorates

Engineering Contradiction:
Improvesecurity of attachmentVSAvoidcomplexity of fastening mechanisms
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The fastening mechanisms are designed to automatically engage and secure the filter carrier to the housing parts without requiring manual intervention or additional tools. Latching mechanisms, clips, or snap-fit features self-activate during installation, and release mechanisms can be triggered by simple user actions such as pressing a button or releasing a latch, allowing the system to secure itself while maintaining ease of operation.

Inventive Principle:
Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution allows for easy replacement and secure attachment of the filter carrier, effectively preventing dust and material ingress while maintaining tool functionality and user convenience, ensuring efficient airflow and prolonged tool lifespan.

Implementation Method 1

The filter carrier (100) has an elastic element, wherein the elastic element is designed to secure the filter carrier on the hand-held power tool (10) in at least one direction, by means of biasing

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

The filter element of the filter carrier may advantageously be arranged in such a manner in the receiving opening of the filter carrier that material particles and dust are prevented from entering the housing of the hand-held power tool through the filter element

Methodology Applied
Scientific EffectPhysical filtration: Filter (physical)

Data Source

PatentUS11485006B2Hand-held power tool comprising a filter support
Publication Date: 2022.11.01 ROBERT BOSCH GMBH
  • US11485006B2 patent drawing
  • US11485006B2 patent drawing
  • US11485006B2 patent drawing

AI summary

A hand-held power tool includes a housing, a filter support, a plurality of securing element, and an actuating unit. The filter support has receiving openings, at least one first fixing element, and at least one second fixing element. The receiving openings are configured to receive filter elements configured to seal the hand-held power tool against a penetration of dust into the housing of the hand-held power tool. First and second fixing elements are fixable to corresponding securing elements arranged on the hand-held power tool, and are configured to releasably fix the filter support to the housing. The actuation unit is actuatable to release the filter support from the hand-held power tool.