Transparent Hole Saw Guide With Concentric Grooves
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Solution Overview
Problem
Existing hole saw assemblies face challenges when drilling into surfaces with pre-existing holes or substrates that are difficult for pilot bits to penetrate, leading to misalignment, kickback, and potential damage or injury, as they lack a stable axis for rotation without a pilot bit.
Innovation Solution
A transparent disk with concentric grooves serves as a hole saw guide, allowing alignment and stabilization of the hole saw on the surface, enabling precise drilling by mounting the disk at the desired position and using a drill to create a circular opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pilot bit is used to provide an axis for hole saw rotation, then the hole saw can be stabilized and aligned, but the pilot bit cannot penetrate certain substrate materials or drill into pre-existing holes
Solution Approach 1:
The patent introduces a template as an intermediary device between the substrate and the hole saw. The template provides a stable axis and positioning reference without requiring direct penetration of the substrate by a pilot bit. The template's sacrificial material can be removed after positioning, allowing the hole saw to drill through without being constrained by substrate penetration limitations.
2Manufacturing precision
If a template is used to provide positioning reference, then hole alignment is improved, but the template lacks adaptability to different hole saw dimensions and applications
Solution Approach 1:
The template is segmented into multiple functional zones: an outer rim with measurement markings for different hole saw dimensions, concentric circles for positioning, and a removable sacrificial center portion. This segmentation allows the same template structure to accommodate various hole saw sizes while maintaining precise alignment capabilities.
Solution Approach 2:
The template is designed as a universal tool that can accommodate different hole saw dimensions through its marked concentric circles and measurement indicators. The same template can be used for various applications by selecting the appropriate reference circle, eliminating the need for multiple specialized templates.
3Device complexity
If no pilot bit or guide is used, then the device complexity is reduced, but misalignment and kickback occur leading to damaged surfaces and potential injury
Solution Approach 1:
The template performs preliminary positioning and alignment actions before the hole saw drilling begins. By establishing the correct position and axis in advance through the template's reference circles and markings, the actual drilling operation can proceed without complex guidance mechanisms, reducing overall system complexity while preventing misalignment and kickback.
Data Source
AI summary
A general purpose hole saw guide and a method of forming holes through surfaces, without the need of a centering bit, are provided. The hole saw guide includes a circular disk with concentric grooves on its surface. The disk is transparent and portable for placement on a surface through which a hole is to be drilled to facilitate the centering and stabilizing control of a hole saw on the surface. The method includes the steps of providing a transparent disk having concentric grooves; positioning the disk on a surface; mounting the disk to the surface; inserting a hole saw that is fitted to a drill into the grooves of the disk; drilling a hole through the disk and surface beneath it; and removing the disk from the surface after the hole has been drilled.