公开(公告)号：US20180199794A1

公开(公告)日：2018-07-19

申请号：US15869488

申请日：2018-01-12

申请人： Black & Decker Inc.

发明人： Uwe NEMETZ ,  Klaus-Dieter ARICH ,  Martin HERBST ,  Arther LAUER

IPC分类号： A47L25/00 ,  B25D17/20

CPC分类号： A47L25/00 ,  A47L7/0095 ,  A47L9/122 ,  A47L9/20 ,  B23Q11/0046 ,  B23Q11/0071 ,  B25D16/00 ,  B25D17/20 ,  B25D17/24 ,  B25D2216/0084 ,  B25D2217/0065 ,  B25D2250/265

摘要： A dust collection box for a dust extractor includes first and second air inlet chambers, an air inlet aperture through which air is drawn into the first air inlet chamber, an air outlet aperture through which air is dawn out of the second air outlet chamber, an air intermediate chamber formed in the housing, and a filter mounted within the housing. The filter includes a first part through which air passes from the air inlet chamber to the air outlet chamber, and a second part through which air passes from the air inlet chamber to the air intermediate chamber. An ambient air aperture is formed in the wall of the housing. A valve disposed proximate the ambient air aperture is switchable to connect the air intermediate chamber to only one of the air outlet chamber or the ambient air aperture.