US Patent 7988790 Washing appliance water softener

Patent 7988790 was granted and assigned to Fisher & Paykel on August, 2011 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Fisher & Paykel

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

79887900

Patent Inventor Names

Stephen Robert Maunsell0

Daniel Warwick Blair0

Date of Patent

August 2, 2011

Patent Application Number

105109360

Date Filed

April 10, 2003

Patent Primary Examiner

‌

Michael Barr

Patent abstract

A water softener particularly for use in a dishwasher. The water softener is located in the dishwasher water supply (238) between the primary supply valve and the wash chamber. The softener includes a resin container (207) with an ion exchange resin (290). Water supplied to the wash chamber optionally passes through the resin container (207). Regenerating brine is developed in a brine container (203). The brine container (203) is supplied manually with solid salt (270) and water diverted into the container from the main supply at an air break (201). In the regenerating cycle brine is delivered from the brine container (203) to the resin container (207) by a pump (206). The duty cycle of the pump (206) determines the degree of regeneration of the resin (290).