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:
Jul. 15, 1997
Filed:
Jun. 18, 1996
Gregory J Engel, Plymouth, MN (US);
Robert D Hennessey, Eden Prairie, MN (US);
Timothy G LaRocque, Plymouth, MN (US);
Terence A Peterson, Plymouth, MN (US);
Tennant Company, Minneapolis, MN (US);
Abstract
A sweeping machine includes a sweeping brush, a hopper having an inlet for receiving debris from said sweeping brush, an opening in said hopper and a vacuum system for creating an air flow path from the hopper inlet through the opening. There is a filter positioned in the hopper opening and a peripheral flexible seal between the inlet side of the filter and the hopper opening. A vibratory filter cleaner is positioned adjacent the outlet side of the filter to impart vibration thereto. There is a closure which encloses the filter and the filter cleaner and there is a second peripheral flexible seal between the filter outlet side and the closure. The filter is movable between the spaced peripheral seals at its inlet and outlet sides whereby vibratory cleaning force applied by the filter cleaner causes vibration of the filter to provide cleaning thereof.