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:
Jun. 17, 2008
Filed:
Jun. 28, 2005
Jeffrey L. Harwig, New Berlin, WI (US);
Thomas Jaworski, Racine, WI (US);
Fukyuen Cheng, Ngau Tau Kok, HK;
Seakee Chen, Guangzhou, CN;
Jeffrey L. Harwig, New Berlin, WI (US);
Thomas Jaworski, Racine, WI (US);
Fukyuen Cheng, Ngau Tau Kok, HK;
Seakee Chen, Guangzhou, CN;
S.C. Johnson & Son, Inc., Racine, WI (US);
Abstract
Tread structures, wave motion navigational controls, and ramp up recovery controls are provided to an autonomous floor cleaner to reduce wheel slippage. The floor cleaner delivers liquid to the floor as part of the cleaning process. Wheels on the device are provided with relatively deep peripheral grooves to minimize the contact surfaces of a sprocket wheel and to accommodate the layer of liquid on the floor. In the event of wheel slippage, or to prevent wheel slippage, the device is designed to move forward with a slight side-to-side wave action caused by periodically altering the relative speeds of two drive wheels. There is also provided a slippage recovery mode where the drive wheels shut down or greatly slow when severe slippage is sensed, followed by a slow ramp up of speed.