ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,715, issued on Dec. 9, was assigned to THE TORO COMPANY (Bloomington, Minn.).
"Debris blower with sound attenuation resonator" was invented by Benjamin L. Waldera (Woodbury, Minn.), Samuel M. Mahaffey (Belle Plaine, Minn.) and David W. Johnson (Hastings, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A blower apparatus includes a fan and motor generating an airflow from an inlet end to an outlet end of the debris blower. The airflow defines an airflow axis and a cross-sectional plane normal to the airflow axis. An enclosure provides an airflow path towards the outlet end. A resonant chamber is proximate an airflow entrance end of the enclosure....