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. 14, 1996
Filed:
Oct. 03, 1994
Warren L Larson, Maple Grove, MN (US);
Michael L Blehert, Crystal, MN (US);
Robert A Geyer, Champlin, MN (US);
Michael S Wilmo, Crystal, MN (US);
Tennant Company, Minneapolis, MN (US);
Abstract
A floor scrubbing machine uses two parallel cylindrical scrub brushes. Each brush is rotated by a separate drive means, and these are at opposite ends of the brushes. This balances the weight of the drives so the brushes exert a uniform pressure on the floor. The brushes are axially offset enough that each brush extends out as far as the drive means of the other brush, thus permitting the machine to scrub close to a wall on either side. The brushes have a more aggressive bristle fill at their ends which extend out under the drive means, where only one brush is scrubbing the floor, so the appearance of the scrubbed floor is essentially the same where scrubbed by one brush as where scrubbed by two brushes.