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:
Jan. 16, 1996
Filed:
Oct. 03, 1994
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 has a chassis mounted on front and rear wheels and a scrub head attached to the front of the chassis by a system of articulated links. Structure is provided for absorbing the kinetic energy of the moving machine in the event that the scrub head strikes a fixed object. On impact the geometry of the linkage system causes the front wheels to be lifted off the floor, thereby quickly lifting considerable weight. Also, a pair of heavy springs stretch, and parts of the chassis deform elastically. By this structure the kinetic energy is absorbed within the machine. No heavy protective shrouds are needed, and a simple flange along the front edge of the scrub head housing provides adequate stiffness.