A filter box for a surface maintenance machine incorporating aspects of a fan housing. In one example, a filter box for a sweeping machine is provided with an impeller fan housing beneath a cylindrical filter. Operation of the impeller fan draws air from a debris hopper, through the cylindrical filter, and through an expansion chamber defined by a scroll conduit prior to outlet to atmosphere.
申请公布号
WO2009110915(A1)
申请公布日期
2009.09.11
申请号
WO2008US59016
申请日期
2008.04.01
申请人
TENNANT COMPANY;ADELMAN, KURT, CLARENCE;WYDRA, LARRY, DAVID