Grinding device
AssigneeMayka Research and Development
InventorMohammad Afshar
Life of this patent
Estimating the term…
Abstract
A hand-held grinding device 1, 50, 60 for sharpening the cutting edge 3 of a chisel 4 comprises a housing 5 in which a grinding wheel 6 is mounted and a handle member 7 defining a guide channel 20 for directing the cutting edge 3 to the wheel 6. The grinding wheel 6 is mounted on a shaft 10 with a free end 8 for mounting in the chuck 9 of a power tool 19. The guide channel 20 has a rear end entry 22 and an end exit 21 adjacent to the grinding surface of the wheel 6. The cutting edge 3 of a chisel 4 to be sharpened is urged against the grinding wheel 6 by spring biassing elements 25, 26 extending into the guide channel 20. A forward bridge 30 is provided above the exit 21 and a rearward bridge member 35 is provided above the end entry 22.
Claims15
A hand-held grinding device for sharpening a cutting edge of a tool such as a chisel, the device comprising:
- a housing;
- a shaft rotatably mounted in the housing for rotation about an axis of rotation, the shaft having a free end for attachment to a chuck for rotation of the shaft;
- a grinding wheel mounted on the shaft, the grinding wheel having a grinding surface;
- an elongate handle member extending from the housing, the elongate handle member defining a tool guide channel adapted to direct a cutting edge of the tool to be sharpened to the grinding surface of the grinding wheel, and the tool guide channel having an end exit adjacent to the grinding surface of the grinding wheel and a rear end entry through which the tool is inserted into the tool guide channel for sharpening;
- and
- biassing means on the elongate handle member extending into the tool guide channel and against which a user presses the tool to engage the cutting edge of the tool against the grinding surface of the grinding wheel.
Dependencies are inferred from the claim text.