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:
Nov. 24, 2015
Filed:
Mar. 26, 2009
Donald J. Legatt, St. Michael, MN (US);
Nicholas J. Graupe, White Bear Lake, MN (US);
Donald J. Legatt, St. Michael, MN (US);
Nicholas J. Graupe, White Bear Lake, MN (US);
Nilfisk-Advance, Inc., Plymouth, MN (US);
Abstract
A surface treating apparatus () includes a tank () containing a cleaning solution () supplied to a supply point (SP) via a fluid flow line () under control of a flow control module (). A chemical pump () controls flow of a chemical supplied to the fluid flow line (). A controller () controls the flow control module () to operate at an operating flow rate based on a level of the cleaning solution () sensed by a solution sensor (). The controller () controls the chemical pump () to operate at a flow rate based on the operating flow rate so that the chemical is supplied to the supply point (SP) at a selected chemical dilution ratio. An agitating element () agitates the surface with scrubbing pressure which is adjusted by the controller (). A spike button () is coupled to controller () and operable to momentarily increase the flow rate, chemical dilution ratio, and/or scrubbing pressure to remove unusually dirty spots.