公开(公告)号：US20170306900A1

公开(公告)日：2017-10-26

申请号：US15476458

申请日：2017-03-31

Applicant: MAKITA CORPORATION

Inventor： Manfred DÖRING

IPC: F02M35/02 ,  F02M35/024 ,  B01D46/52 ,  B01D45/12 ,  F02M35/022 ,  B01D50/00 ,  F02M35/10

CPC classification number: F02M35/0216 ,  B01D45/12 ,  B01D46/52 ,  B01D50/002 ,  B01D2279/60 ,  F02M35/022 ,  F02M35/0223 ,  F02M35/0226 ,  F02M35/024 ,  F02M35/08 ,  F02M35/1017 ,  Y02T10/146

Abstract: An air filter device for filtering the intake air of a combustion engine of a hand-held small tool, in particular an angle grinder, with a pre-filter stage having at least one cyclone air filter and with a main filter stage arranged downstream, having a permeable filter body, characterized in that a pre-separation device for pre-separating contaminations in the intake air is installed upstream of the intake air in front of the cyclone air filter, wherein the pre-separation device is configured in such a way that separated contaminations can be removed from the outside of the small tool.