Flexible Blade Hole Saw for Precise Non-Circular Cuts

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Solution Overview

Problem

Conventional hole saws face challenges in creating precise and varied hole sizes and shapes due to their rigid structure, which limits their ability to adapt to different materials and orientations, and they often require complex setups for achieving non-circular cuts.

Innovation Solution

A hole saw design featuring a planar base member with orthogonally extending blade members, each with cutting teeth and flexible distal ends, allowing for transverse flexion to maintain a linear cutting path despite rotational movement, and optionally connected via extenders for enhanced stability and rigidity, enabling attachment to oscillating power tools for efficient cutting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional hole saws use a rigid structure, then structural stability is maintained, but the ability to adapt to different materials and orientations is limited

Engineering Contradiction:

Improveadaptability to different materials and orientationsVSAvoidstructural rigidity

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The blade members are designed with flexible distal ends that can dynamically adjust their position and orientation during cutting operations. This allows the hole saw to adapt to different materials and cutting orientations while maintaining structural stability through the rigid base member and controlled flexibility in the blade portions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The flexibility parameter of the blade members is specifically engineered to allow transverse flexion, enabling the cutting elements to conform to various material densities and orientations. This parameter change from completely rigid to selectively flexible resolves the contradiction between stability and adaptability.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If conventional hole saws use a rigid structure, then manufacturing simplicity is maintained, but the ability to create varied hole sizes and shapes is limited

Engineering Contradiction:

Improveability to create varied hole sizes and shapesVSAvoidstructural complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The hole saw is segmented into a rigid base member and multiple independent blade members with flexible distal ends. This segmentation allows each blade member to independently create different cutting paths and angles, enabling varied hole sizes and shapes while keeping the overall device relatively simple in construction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dynamic flexibility of the blade member distal ends provides the versatility to create different hole configurations without requiring complex adjustable mechanisms, thereby achieving varied cutting capabilities with minimal increase in device complexity.

Inventive Principle:

Principle #15Dynamics

3Manufacturing precision

If conventional hole saws require complex setups for non-circular cuts, then cutting precision for specific shapes is improved, but ease of operation deteriorates

Engineering Contradiction:

Improvecutting precision for specific shapesVSAvoidease of operation

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The flexible distal ends of the blade members automatically adjust and conform to the desired cutting path through their inherent flexibility, eliminating the need for complex manual setups or adjustments. The structure serves itself by using the flexibility to achieve precise non-circular cuts directly during operation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The dynamic flexibility allows the blade members to naturally follow the intended cutting path for various shapes without requiring pre-setup adjustments, thereby achieving both cutting precision and ease of operation simultaneously.

Inventive Principle:

Principle #15Dynamics

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

Enables the creation of diverse hole sizes and shapes by translating rotational movement into linear cutting motions, improving cutting precision and adaptability to different materials and orientations, and simplifying the cutting process with oscillating drive devices.

Implementation Method 1

Each blade member is configured to have the respective distal ends of the respective blade member flex transversely to the longitudinal cutting direction of the respective blade member

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS11364559B2Hole saw

Publication Date: 2022.06.21 LABOR SAVING SYST

AI summary

A hole saw includes a base member configured to secure the hole saw to a drive device and a plurality of blade members where each blade member is connected to and disposed orthogonally to the base member via a respective extender. Each blade member has cutting teeth extending in a respective cutting direction and distances between the cutting teeth and the base member vary along the respective cutting direction of the respective blade members. Each respective extender is configured cantilever support opposite, freestanding distal ends of the respective blade member where each distal end of each respective blade member is disconnected from the distal end of an adjacent blade member.