| 摘要 |
<p>This invention relates to a power tool 1 including an operative element 4 for treating a work piece. The power tool 1 defines an air passageway and includes propelling means 20 operative to induce air to flow through the passageway The passageway direct the induced air over the power tool's motor 14 to cool the motor 14. The air is exhausted from the tool 1 by exhaust means onto the operative element 4 and a worked face of the work piece. This cools the operative element 4 which prolongs its working life. Furthermore, the exhausted air facilitates removal of swarf from the worked face.</p> |
