Patent ID: 8371034

Claim:
A cutter comprising: a cutter body accommodating a motor, the cutter body having a plurality of outlet ports for discharging cooling air for cooling the motor accommodated in the cutter body; a rotary blade adapted to be rotatably driven in a rotation direction by the motor; a fan for cooling the motor; and a dust collection cover detachably assembled to the cutter body; the dust collection cover comprising: a cover body partially covering the rotary blade and formed with a drain cylinder portion on the trailing side of the rotary blade in the rotation direction of the blade to remove cutting chips and residues generated during a cutting operation, the drain cylinder portion being capable of being detachably connected to a dust collector; an air ejection cylinder portion provided to the cover body adjacent to and on the trailing side of the drain cylinder portion in the rotation direction of the blade through which a blowing air is directed toward a workpiece for directing the cutting chips and residues toward the drain cylinder portion; an ejection hose member having one end connected to the air ejection cylinder portion; and an attachment member covering some of the outlet ports and attached to the other end of the ejection hose member and to the cutter body, wherein the drain cylinder portion is provided between the rotary blade and the air ejection cylinder portion, and a part of cooling air generated by the fan is discharged through the some of the outlet ports and the air ejection hose into the air ejection cylinder portion and remaining cooling air is discharged to the atmosphere through other of the outlet ports that are not covered by said attachment member.