The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2013
Filed:
Mar. 02, 2009
Applicant:
Michael Stewart Wilmo, Plymouth, MN (US);
Inventor:
Michael Stewart Wilmo, Plymouth, MN (US);
Assignee:
Tennant Company, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47L 9/10 (2006.01); A47L 9/20 (2006.01); B01D 41/00 (2006.01); B01D 45/18 (2006.01); B01D 46/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A mobile surface maintenance machine with a debris hopper and a filter module providing at least two filter stages for separating dust and debris within the debris hopper, the filter module including a filter shaking mechanism and a housing adapted to seal against the upper opening of the debris hopper, and wherein the debris hopper is removed from air communication with the exhaust fan when the debris hopper is in a debris dump configuration and is returned to air communication with the exhaust fan when the debris hopper is lowered into an operational configuration.