Miniature knife sharpening apparatus
US9545703B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 2015 |
| Grant date | Jan 17, 2017 |
| Priority date | — |
| Expiry date | Aug 10, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24D15/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A sharpening apparatus that may be used by a relatively unskilled person to simultaneously sharpen the two opposed cutting edges of a knife blade by hand and to maintain a sharpened cutting edge along the blade with minimal effort and training is provided by the invention. The apparatus comprises a panel member with a slot partially extending from its top edge, and a pair of sharpening steels that are pivotably mounted to the panel member to swing downwards in a crossed relation across the slot. A pair of leaf spring bias the sharpening steels in their standby position. When the knife blade is moved down through the slot, it comes into contact with crossed sharpening steels to bow them outwards under tension applied by the leaf springs. The cutting edges of the knife blade are drawn along and against the sharpening steels to automatically sharpen their cutting edges at the proper angle without any need to match angles between the cutting edges of the knife and the sharpening steels, and without any counterweights applied to the sharpening steels. Such a sharpening apparatus can be used to maintain an extremely sharp cutting edge for precise cutting of a material without crushing or…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.