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. 18, 2025
Filed:
May. 15, 2024
Nilfisk A/s, Copenhagen, DK;
John Helgeson, Shoreview, MN (US);
Nilfisk A/S, Copenhagen, DK;
Abstract
A method of detecting a fill level in a debris basket of a cleaning machine include steps of initiating a wet cleaning mode, measuring a pressure differential between a vacuum compartment and a recovery tank, and determining a fill level of a debris basket in response to the measured pressure differential. The cleaning machine includes a scrubbing element mounted to the cleaning machine and engageable with a cleaning surface, a squeegee disposed to capture the debris removed from the cleaning surface by the scrubbing element, and a recovery tank assembly. The recovery tank assembly includes a recovery tank with a cavity disposed to collect liquid cleaning solution used during the wet cleaning mode, a squeegee hose fluidly connected to the recovery tank and disposed to deliver collected used liquid cleaning solution from the squeegee to the recovery tank, a debris basket disposed in the recovery tank and fluidly connected with the squeegee hose, and a vacuum compartment adjacent the recovery tank.