公开(公告)号：US20190154058A1

公开(公告)日：2019-05-23

申请号：US16150994

申请日：2018-10-03

申请人： BLACK & DECKER INC.

发明人： Oleksiy SERGYEYENKO ,  Frank MANNARINO ,  Patrick Joseph TILSON

IPC分类号： F04D29/54 ,  F04D29/68 ,  F04D19/00 ,  F04D29/52

摘要： According to examples, a blower may include a housing, a fan positioned within the housing, the fan having a fan edge, and a fan housing section encircling the fan, the fan housing section having an inner surface that spans an inner circumference of the housing section, the inner surface having a plurality of indentations and being spaced within a certain distance from the fan edge.