US Patent 7146670 Method of operating a laundry appliance drain pump

Patent 7146670 was granted and assigned to Fisher & Paykel on December, 2006 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

71466700

Patent Inventor Names

Lorraine Nevinson0

Ian Campbell McGill0

Date of Patent

December 12, 2006

Patent Application Number

106920460

Date Filed

October 23, 2003

Patent Primary Examiner

‌

Joseph L. Perrin

Patent abstract

A method of operating a drain pump in a laundry washing machine during the drain phase of the wash cycle to reduce pump blockages is disclosed. The method includes the steps of (a) starting the pump and running it for a first period of time to produce a discharge of a given flow rate, (b) stopping the pump and leaving the pump stopped for a second period of time, and repeating steps (a) and (b) for the duration of said drain phase, said second period of time being such that the flow rate reduces substantially to zero.