Patent ID: 7223161

Claim:
A hand-held cutting apparatus comprising: a body including a driving power source and an output shaft coupled to the driving power source; a cutting unit mounted on the body including; mounting means for detachably mounting a circular blade on the output shaft; and a dust cover including an opening edge facing a side of an object for cutting, wherein the dust cover covers the circular blade and the mounting means; a dust discharging unit attached to the cutting unit for sucking dust particles within the dust cover and externally discharging the dust particles; a pulley fixed to the output shaft engaged with a flat belt for transmitting power at the output shaft to the dust discharging unit; an inner cover, including a through hole allowing at least one of the output shaft and a rotation member fixed to the output shaft to protrude from the inner cover therethrough, arranged in the dust cover, for covering the flat belt and the pulley; and a seal comprising felt for sealing a gap between at least one of the output shaft and the rotation member and the through hole, wherein the seal prevents the dust particles from entering the side of the pulley.