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:
Apr. 01, 2008
Filed:
Jul. 06, 2004
Vincent P. Gurubatham, St. Joseph, MI (US);
Joseph K. Sharkey, Niles, MI (US);
Aaron M Torberg, Windham, ME (US);
Robert H. Ashton, Watervliet, MI (US);
Vincent P. Gurubatham, St. Joseph, MI (US);
Joseph K. Sharkey, Niles, MI (US);
Aaron M Torberg, Windham, ME (US);
Robert H. Ashton, Watervliet, MI (US);
Whirlpool Corporation, Benton Harbor, MI (US);
Abstract
A filter system for dishwasher with a sump having inlets leading to a wash pump and a drain pump in the bottom wall. The filter assembly includes a vertical filter retainer an overlying perforate hood, a multiple porosity filter element carried on the filter retainer and a back wash sprayer rotatably mounted inside the filter retainer with at least one backwash nozzle directed toward the filter assembly. The inlet leading to the wash pump is positioned inside the filter element and the inlet to the drain pump is located outside the filter element. The filter element has openings that vary in size from the top to the bottom of the filter element. The filter element openings can be arranged in bands of different porosity openings including fine, medium and coarse porosity openings. The perforate hood can have coarse porosity openings.