Patent ID: 8828223

Claim:
A filter system for a cooking appliance, comprising: a cylindrical primary housing and a cylindrical primary screen disposed concentrically therein; a flow path configured for a continuous flow of a liquid to be filtered from a cooking appliance to the cylindrical primary housing, wherein the path extends into an internal volume defined by the cylindrical primary screen, the primary screen is configured to allow liquid flow through the cylindrical primary screen into an annulus defined between the cylindrical primary housing and the cylindrical primary screen, but substantially retain any particulate matter initially entrained in the liquid within the internal volume; a pump comprising a suction fluidly connected to the annulus and a discharge fluidly connected to a return in the cooking appliance, wherein the cylindrical primary housing is directly fluidly connected to a debris extraction mechanism configured to continuously receive the particulate matter extracted from the cylindrical primary screen and automatically remove the particulate matter from the filter system, wherein the debris extraction mechanism comprises a second housing, a piston translatable therethrough, and a translatable end cup.