04580313 is referenced by 36 patents and cites 17 patents.

A walk behind floor maintenance machine is disclosed including a filter and filter housing that may be pivoted away to permit removal of the debris hopper. The filter may be cleaned by vibrating the filter and filter housing. Dust vibrated from the filter slides into the hopper. The hopper may be manually removed for emptying.

Title
Walk behind floor maintenance machine
Application Number
6/531456
Publication Number
4580313
Application Date
September 12, 1983
Publication Date
April 8, 1986
Inventor
Michael L Blehert
Crystal
MN, US
Agent
Kinzer Plyer Dorn & McEachran
Assignee
Tennant Company
MN, US
IPC
A47L 11/24
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