Patent ID: 7115027

Claim:
A hand-held grinding tool for sharpening a work piece comprising: an oscillatory drive having a drive shaft which is driven oscillatingly back and forth about a longitudinal axis thereof; a holder for mounting a working part being configured as a grinding plate having a flat grinding surface; a fixed holding section provided on said holder and a removable clamping part provided on said holder for clamping said working part at one end thereof between said fixed holding section and said removable clamping part; and at least one tensioning part for fixing said working part between said fixed holding section and said removable clamping part of said holder in a position so that said grinding surface extends in a plane substantially perpendicularly to said drive shaft; wherein said clamping part has a generally triangular cross section comprising an outer surface which serves as a guide surface for supporting a surface of said work piece to define a predetermined angle between said surface of said work piece and said grinding surface of said working part when guiding said grinding tool along said surface of said work piece for sharpening said work piece; wherein said predetermined angle is between 10° and 40°.