Swing-Arm Abrasive Assembly for Knife Sharpening Precision
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Solution Overview
Problem
Existing sharpening technologies lack precision and repeatability in sharpening cutting tools, particularly kitchen knives, due to inadequate configurations for adjusting abrasive surfaces and angles, leading to inconsistent sharpening results.
Innovation Solution
A manual cutting tool sharpener with a swing-arm abrasive assembly that includes a frame, user handle, and an abrasive cartridge with multiple abrasive members, allowing users to select and position abrasive surfaces at specific angles along the cutting edge, enabling precise sharpening operations through a controlled arcuate path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sharpening techniques are used, then sharpening can be performed, but precision and repeatability are insufficient
Solution Approach 1:
The abrasive assembly is configured to swing along an arcuate path defined by the rod, allowing dynamic movement of the abrasive surface along the cutting edge while maintaining consistent angular relationship. This dynamic positioning enables precise and repeatable sharpening by following the natural geometry of the blade edge.
Solution Approach 2:
The system allows selection of different abrasive surfaces with varying grit sizes and angles. Users can change the abrasive parameters (grit size, angle) to achieve different sharpening stages from coarse to fine, improving both precision and repeatability across multiple sharpening sessions.
2Adaptability or versatility
If multiple abrasive surfaces are provided, then versatility is improved, but device complexity increases
Solution Approach 1:
The abrasive cartridge is divided into multiple discrete abrasive members, each with a different abrasive surface. This segmentation allows users to select specific abrasive surfaces for different sharpening needs while keeping each individual abrasive member relatively simple in structure.
Solution Approach 2:
The abrasive cartridge is designed to accommodate multiple abrasive surfaces within a single cartridge assembly. This multi-functionality provides versatility for different sharpening applications without requiring multiple separate devices or complex adjustment mechanisms.
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
The solution provides accurate and repeatable sharpening of cutting tools by allowing users to select and position abrasive surfaces at various angles, improving the sharpness and geometry of the cutting edge, enhancing the effectiveness of the sharpening process.
Implementation Method 1
an abrasive cartridge secured to the frame. The abrasive cartridge has a plurality of abrasive members with associated abrasive surfaces
Data Source
AI summary
Method and apparatus for sharpening a cutting edge of a cutting tool, such as a kitchen knife. In some embodiments, an abrasive assembly has a frame, a handle, and a cartridge that supports a plurality of abrasive members each having an associated abrasive surface. A rod affixes the abrasive assembly to a base assembly to facilitate movement of the abrasive assembly along the cutting edge of the tool responsive to engagement, by a user, of the user handle. Each abrasive member is configured to be moved, by the user, with respect to the handle to present each abrasive surface in turn. In some cases, the cartridge is rotatable about a cartridge axis that may be parallel or non-parallel to a central axis of the rod.