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:
Sep. 11, 2001
Filed:
Jan. 27, 1997
Applicant:
Inventors:
Joseph F. D'Costa, New Hope, MN (US);
Michael T. Basham, Maple Grove, MN (US);
Warren L. Larson, Maple Grove, MN (US);
Assignee:
Tennant Company, Golden Valley, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
A47L 1/124 ; E01H 1/04 ; A46B 9/02 ;
U.S. Cl.
CPC ...
A47L 1/124 ; E01H 1/04 ; A46B 9/02 ;
Abstract
A sweeping machine for picking up debris from a surface includes a frame and wheels attached to said frame to support the frame of the sweeping machine over the surface being swept. A cylindrical brush is rotatably attached to said frame. The cylindrical brush includes a tubular main body and tufts attached to said tube such that the tufts extend radially outward from said tube. The tube has regions devoid of tufts bounded by regions having tufts. The sweeping machine also includes a mechanism for rotating said cylindrical brush.