Oscillating Power Tool Blade Tooth Geometry for Precise Cutting

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Solution Overview

Problem

Existing oscillating power tool blades lack optimal design features that enhance cutting efficiency and versatility, particularly in terms of tooth configuration and alignment with the longitudinal axis, leading to suboptimal performance in various cutting tasks.

Innovation Solution

The blade design features teeth extending generally perpendicular to the longitudinal axis, with symmetrical or asymmetrical stops and inner/outer walls that enhance cutting edge geometry, allowing for improved cutting efficiency and adaptability to different cutting tasks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If teeth extend perpendicular to the longitudinal axis with symmetrical stops, then cutting efficiency is improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvecutting efficiencyVSAvoidtooth alignment precision

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The blade design incorporates asymmetrical stops where the first stop extends further from the working edge than the second stop. This asymmetry allows for optimized cutting performance on different sides of the blade while maintaining manufacturing feasibility through clear dimensional specifications rather than requiring perfect symmetry

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

Different sections of the blade are designed with different tooth configurations and stop positions. The first stop and second stop have different extension distances from the working edge, allowing each region to be optimized for its specific cutting function while maintaining overall blade performance

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If inner walls are made substantially parallel with the longitudinal axis, then cutting versatility is improved, but device complexity increases

Engineering Contradiction:

Improvecutting versatilityVSAvoidblade geometry complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The blade design with inner walls substantially parallel to the longitudinal axis creates a geometry that can effectively cut various materials including wood, metal, and plastic. The parallel configuration allows the blade to maintain consistent cutting performance across different material types, making it a universal cutting tool

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The design specifies that inner walls be substantially parallel with the longitudinal axis, establishing a clear geometric parameter that simplifies manufacturing while maintaining versatility. This parameter change from angled or curved configurations to parallel walls reduces complexity while preserving multi-functional cutting capability

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP3993937B1Blade for a power tool

Publication Date: 2025.12.03 MILWAUKEE ELECTRIC TOOL CORP

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AI summary

A blade includes an attachment portion having a mounting aperture, the attachment portion configured to couple with an oscillating power tool. The blade also includes a body extending from the attachment portion in a direction defining a longitudinal axis. The body includes a cutting edge having teeth and a distal end generally opposite the attachment portion. The cutting edge is recessed from the distal end.