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. 06, 2009
Filed:
Feb. 13, 2004
Thomas M. Johnson, Jackson, TN (US);
John Trevor Morrison, Cedar Grove, TN (US);
Thomas M. Johnson, Jackson, TN (US);
John Trevor Morrison, Cedar Grove, TN (US);
Maytag Corporation, Benton Harbor, MI (US);
Abstract
A dishwasher includes a pump assembly which functions to chop all fluid entrained soil prior to directing fluid to upper and lower wash arms. A flow conduit leading to the upper wash arm is provided with a sampling port which directs a percentage of the fluid flow into a filter chamber having one or more fine mesh filter screens that open into the dishwasher tub basin. The filter chamber is exposed to a collection chamber that leads to a drain. In the event the filter chamber becomes clogged, a pressure relief valve opens a pressure regulation port to permit washing fluid in the filter chamber to enter the tub basin. In one embodiment, the pressure relief valve is constituted by a check ball which is displaced by a pressure build up in the filter chamber. In another embodiment, the pressure relief valve is constituted by a flapper valve.