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:
May. 17, 2005
Filed:
Sep. 06, 2002
Applicant:
Michael S. Wilmo, Crystal, MN (US);
Inventor:
Michael S. Wilmo, Crystal, MN (US);
Assignee:
Tennant Company, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E01H001/05 ;
U.S. Cl.
CPC ...
Abstract
A street sweeper drag shoe of cast austempered ductile iron used with a rotary broom in sweeping, whereby escaping debris from under a contact skid is recaptured. The street sweeper drag shoe contains a deflection plate that redirects bristle tip movement inwardly to allow the broom to recapture debris which escapes during normal operation. The street sweeper drag shoe also includes an angled wedge for concentrating outer bristles of the broom into a rotating barrier to prevent debris migration to the ends of the broom. The contact skid exhibits total planar contact with the roadway without interceding carbide wear plates.