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:
Nov. 22, 2005
Filed:
Sep. 06, 2002
Applicants:
Gregory J. Engel, Plymouth, MN (US);
Theodore J. Olsonoski, Rogers, MN (US);
Inventors:
Gregory J. Engel, Plymouth, MN (US);
Theodore J. Olsonoski, Rogers, MN (US);
Assignee:
Tennant Company, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47L009/20 ;
U.S. Cl.
CPC ...
Abstract
Street sweeper having dust control from two or more cleaning heads with one air source where one fan provides vacuum for a centrally located rotating broom which is surrounded by a vacuumized chamber and for a gutter broom which is surrounded by a vacuumized chamber. A plenum having a unique valving system and a filter shaker mechanism provides for filter cleaning and for a dirt and debris path from the plenum to a hopper bottom during filter cleaning.