ALEXANDRIA, Va., July 7 -- United States Patent no. 12,674,578, issued on July 7, was assigned to Wacker Neuson America Corp. (Menomonee Falls, Wis.).
"Hydronic surface heater with auto-adjusting burner" was invented by John Lane (Hartford, Wis.), Andrew Hensch (West Allis, Wis.), Andrew Gastrow (Wauwatosa, Wis.) and Donald Duffek (Hartford, Wis.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A surface heater automatically adjusts the supply of fuel and/air to the burner in order to maintain a desired air/fuel ratio despite changes in ambient air temperature and/or pressure. The adjustment may be performed on a periodic or continuous basis and on either an open-loop basis or a closed-loop basis. The adjustme...