Power Tool Rip Guide With Foldable L-Shaped Arms

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Solution Overview

Problem

Portable power tools with non-standard attachment interfaces often prevent the use of standard cutting elements, and existing solutions fail to provide efficient methods for removing perforated material, making accurate rip cuts and bevel adjustments cumbersome.

Innovation Solution

A perforated material remover with a versatile design that accommodates non-standard interfaces, a durable rip guide with L-shaped support arms for accurate cuts, and dual bevel scales for precise angle measurements, enhancing compatibility and usability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If perforations are added to the cutting element to accommodate non-standard spindle interfaces, then the cutting element can be attached to the power tool, but the perforated material becomes difficult to remove and compromises the structural integrity of the cutting element

Engineering Contradiction:
Improvecompatibility with non-standard spindle interfacesVSAvoiddifficulty in removing perforated material
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent introduces a dedicated tool that extracts the perforated material from the cutting element. The tool engages with the perforations and systematically removes the debris, separating the harmful element (perforated material) from the functional component (cutting element) to restore the cutting element's integrity while maintaining the non-standard interface compatibility.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces an intermediary tool between the user and the perforated material. This tool serves as a mediator that facilitates the removal process, providing a controlled and efficient means to extract the perforated material without damaging the cutting element or requiring excessive force from the user.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Adaptability or versatility

If standard cutting elements are used with non-standard spindle interfaces, then compatibility is achieved through perforations, but the cutting element's structural integrity and performance are compromised

Engineering Contradiction:
Improveinterface compatibilityVSAvoidstructural integrity of cutting element
Core Design Contradiction:
Adaptability or versatilityVSStrength

Solution Approach 1:

The patent extracts the perforated material that compromises the cutting element's structural integrity. By removing this harmful element, the cutting element's strength and performance are restored while maintaining the adapted interface compatibility through the specialized removal tool.

Inventive Principle:
Principle #2Taking out (Extraction)

3Reliability

If rip guides are designed with traditional attachment methods, then they can be attached to the saw, but they lack durability and cannot be folded for compact storage

Engineering Contradiction:
Improvedurability of rip guide attachmentVSAvoidstorage space required for rip guide
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The patent introduces dynamic characteristics to the rip guide attachment system. The support arms are designed to be movable and foldable, transitioning between a deployed position for durable attachment during cutting operations and a folded position for compact storage. This dynamic design allows the same structure to satisfy both durability and space efficiency requirements.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent segments the rip guide into modular components, particularly the support arms that can be folded independently. This segmentation allows the rip guide to be disassembled or folded into a compact configuration for storage while maintaining its full functionality and durability when deployed for cutting operations.

Inventive Principle:
Principle #1Segmentation

4Measurement precision

If single bevel scale is used on the saw, then the device complexity is reduced, but the measurement precision for bevel angle settings is insufficient

Engineering Contradiction:
Improveaccuracy of bevel angle measurementVSAvoidnumber of bevel scales
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent segments the bevel angle measurement function into multiple independent scales. By dividing the measurement task across multiple scales, each scale can be simpler in design while collectively providing high precision through their combined measurement capabilities, thus achieving measurement precision without requiring a single overly complex scale.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS8677634B2Power tools
Publication Date: 2014.03.25 BLACK & DECKER CORP
  • US8677634B2 patent drawing
  • US8677634B2 patent drawing
  • US8677634B2 patent drawing

AI summary

A power tool is provided with a perforated material remover to remove perforated material from power tool cutting implements. The power tool also includes a rip guide which has a long guide edge and two attachment points to the shoe/base of the saw. The rip guide is attached to the base/shoe via a pair of L-shaped openings that accept L-shaped support arms of the rip guide. The rip guide can also be folded for compact storage. The power tool also includes dual bevel scales for quickly and easily setting the bevel angle on the power tool.