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. 13, 2000
Filed:
Aug. 25, 1998
Donald F Durenberger, Dayton, MN (US);
Michael T Basham, Maple Grove, MN (US);
Joseph F D'Costa, New Hope, MN (US);
Tennant Company, Minneapolis, MN (US);
Abstract
A sweeping machine has a chassis, wheels for supporting the chassis and a brush mounted on the chassis for rotation to throw debris over the brush and into a debris hopper mounted on the chassis behind the brush. There is a control lever on the chassis for raising and lowering the brush relative to a surface to be swept. As the brush wears, a recirculation flap is positioned between the brush and the debris hopper and located closely adjacent a rear portion of the brush to direct debris not reaching the debris hopper forwardly toward the brush sweeping zone. The recirculation flap is moved toward and away from the brush concurrently with movement of the brush toward the surface being swept as the brush wears, whereby the space between the rear portion of the brush and the recirculation flap remains relatively constant.