ALEXANDRIA, Va., March 5 -- United States Patent no. 12,241,475, issued on March 4, was assigned to Nicotra Gebhardt GmbH (Waldenburg, Germany).
"Radial impeller" was invented by Thomas Heigold (Gaisbach, Germany) and Klaus Gundel (Kupferzell-Belzhag, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A radial impeller having a cover plate with an inlet opening and a support plate, the plates being connected to one another by means of a vane ring having multiple vanes. The vanes each have two side edges opposite one another, one of which is connected to the cover plate and the other to the support plate. The side edges each extend between a vane inlet edge and a vane outlet edge which is opposite in a ci...