发明名称 |
Drill having dust collecting device. |
摘要 |
<p>An electric hammer drill including a vacuum dust collecting device (22) for collecting dust from an area of an article being drilled by a drill bit (21) wherein a hose (31) extending from a body (20) of the hammer drill is directly connected to an end of a movable first pipe (20) which is slidably received in a stationary second pipe (30). During a drilling operation, the first pipe (29) slides back and forth along the second pipe (30) as a suction hood (27) moves in a direction opposite to the direction of movement of the drill bit (21). Since a sliding portion between the first and second pipes (29, 30) is separated by the hose (31) from a path of conveyance of the dust, the first pipe (29) and the hood (27) connected thereto always move smoothly relative to the drill bit (21).</p> |
申请公布号 |
EP0426321(A1) |
申请公布日期 |
1991.05.08 |
申请号 |
EP19900311236 |
申请日期 |
1990.10.12 |
申请人 |
HITACHI KOKI CO., LTD. |
发明人 |
WATANABE, YOSHIHIKO;OHMORI, YASUKI |
分类号 |
B23B45/16;B23B47/34;B23Q11/00 |
主分类号 |
B23B45/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|