Sharpener with precision adjustment

By using a sharpener with a detachable blade holder and grinding assembly, the problems of accuracy and repeatability in sharpening cutting tools are solved, providing a flexible sharpening solution suitable for a variety of cutting tools.

CN116847950BActive Publication Date: 2026-07-21DAREX LLC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DAREX LLC
Filing Date
2021-09-13
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing cutting tools are difficult to sharpen accurately and repeatably after long-term use, and there is a lack of efficient sharpening device construction.

Method used

A tool sharpener is employed, comprising a detachable insert holder and a grinding assembly. The holder is aligned with the center plane of the cutting tool via a guide, and the grinding assembly supports the workpiece via a swing arm, providing multi-point contact and repeatable sharpening angles, and supporting workpiece changes for various abrasive grades.

Benefits of technology

It enables precise and repeatable sharpening of cutting tools, supports the sharpening needs of different types of tools, and allows tools to be disassembled for inspection or grinding media to be replaced without affecting the settings.

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Abstract

An apparatus (100) and a method (500) for sharpening the cutting edges (20, 412, 446, 456, 466, 476, 546, 584, 590, 630) of a cutting tool (10, 10A, 390, 400, 440, 450, 460, 584, 594, 634, 684, 686), such as a kitchen knife. The clamps (120, 120A, 120B) secure the opposite sides (16, 18, 408, 410, 472, 474) of the cutting tool inserts (14, 392, 404, 444, 454, 464, 470A, 470B, 470C, 540, 582, 592, 632, 680), and include a body (132, 558, 612) and articulated first and second clamps (140, 142, 550, 552, 600, 602), each clamp having a clamping end adapted to compress and engage the corresponding side of the insert. Guide members (192, 192A, 568, 610) connected to the main body have converging support surfaces (194, 196) that contact-engage the trailing edges (ridges) of the inserts (26, 448, 458, 468, 586, 596, 636) opposite the cutting edge, nominally aligning the center plane of the insert (165) with the center plane of the fixture (165A). A retraction mechanism (138) forms a clamping force on the corresponding side of the insert via clamps. A further embodiment includes a base assembly (110) suitable for receiving the fixture and a swing-arm grinding assembly (130) for sharpening the cutting edge.
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