ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,934, issued on March 18, was assigned to FRABA B.V. (Sg Heerlen, Netherlands).
"Drive arrangement for a door device, and door device" was invented by Martin Forthaus (Cologne, Germany) and Konrad Machill (Cologne, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A drive arrangement for a door device which includes a door member. The drive arrangement includes a door shaft, a driven shaft which is operatively connected to the door shaft, a transmission arrangement which drives the door shaft, and at least one electric motor which is coupled to the transmission arrangement to move the door member of the door device from a closed state to an ope...