Removable Bolster Fixed Blade Knife for Sharpening Access

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Solution Overview

Problem

Existing fixed blade knives face challenges with bolsters that interfere with sharpening the cutting edge and lack customization options, compromising control and precision.

Innovation Solution

A fixed blade knife design featuring removable bolsters that connect releasably to the handle, allowing for enhanced balance, grip, and customization while minimizing interference with sharpening.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a bolster is added to enhance balance and control, then the knife's control and precision are improved, but the bolster interferes with sharpening the cutting edge

Engineering Contradiction:
Improvecontrol and precisionVSAvoidsharpening accessibility
Core Design Contradiction:
Ease of operationVSEase of manufacture

Solution Approach 1:

The bolster is designed as a separate, removable component rather than being integrated permanently into the handle. This segmentation allows the bolster to be detached when sharpening is needed, resolving the conflict between maintaining control during use and accessing the cutting edge for sharpening.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The bolster transitions from a static, permanent component to a dynamic, removable one. The releasable connection mechanism enables the bolster to be positioned in different states (attached during use, removed during maintenance), adapting to different operational requirements.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If a bolster is added to enhance balance and control, then the knife's control and precision are improved, but the knife structure becomes more complex

Engineering Contradiction:
Improvecontrol and precisionVSAvoidknife structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

By dividing the bolster into a separate component with a releasable connection, the design adds functionality without creating an intractably complex integrated structure. The segmentation allows for simpler individual parts that can be manufactured and assembled independently.

Inventive Principle:
Principle #1Segmentation

3Ease of repair

If the bolster is made removable to allow customization and maintenance, then ease of repair and customization are improved, but the connection mechanism becomes more complex

Engineering Contradiction:
Improvebolster replacementVSAvoidconnection mechanism
Core Design Contradiction:
Ease of repairVSDevice complexity

Solution Approach 1:

The connection mechanism is extracted as a separate functional element between the bolster and handle, rather than being embedded within the bolster itself. This allows the connection system to be optimized independently for ease of assembly and disassembly while maintaining structural integrity.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentUS12528211B1Fixed blade knife
Publication Date: 2026.01.20 MICROTECH KNIVES INC
  • US12528211B1 patent drawing
  • US12528211B1 patent drawing
  • US12528211B1 patent drawing

AI summary

A fixed blade knife includes a handle having an inner surface. A blade has a tang that extends at least partially along the inner surface of the handle. A bolster extends along at least a portion of the tang and releasably connects to the handle.