Patent 8360250 was granted and assigned to Toro on January, 2013 by the United States Patent and Trademark Office.
An elongated filter disposed over a metering passage of a valve. A rotor is rotatably mounted over the filter and includes a scraping surface positioned along the length of the filter. As water enters the valve, the rotor rotates, causing the scraping surface to scrape off any debris along the length of the filter.