ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,994, issued on Nov. 3, was assigned to VIESSMANN CLIMATE SOLUTIONS SE (Allendorf, Germany).
"Device for setting an air volumetric flow rate" was invented by Paul Mathis (Duren, Germany) and Dirk Muller (Aachen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A device for adjusting a constant air volume flow has air guiding members which extend in a radial direction and in a state distributed about a longitudinal center axis of the device. Between adjacent air guiding members there are formed air passages which can be adjusted in terms of their opening cross section. The air guiding members are formed from a first and a second air guiding unit ...