US Patent 7374475 Hand-held sharpener device

A hand-held sharpener device for sharpening and deburring convergent surface cutting edge implements including an elongated cylindrical body having a central area mounting a plurality of sharpener bit assemblies and opposite end areas providing hand grips for holding and moving the sharpener device across a cutting edge to be sharpened. One of the sharpener bit assemblies includes two associated sharpening bits for sharpening blades having two converging cutter surfaces and a second sharpener bit assembly includes a sharpening bit and a dummy bit for sharpening blades having only one cutting surface. The sharpener bits and the dummy bit are held and clamped in bit receiving cavities in mating sections of the sharpener body.