ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,385,309, issued on Aug. 12, was assigned to DORMAKABA DEUTSCHLAND GMBH (Ennepetal, Germany).
"Linkage for a door actuator" was invented by Thomas Salutzki (Ennepetal, Germany), Sabine Wiemann (Ennepetal, Germany) and Alexander Hellwig (Ennepetal, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A linkage for force transmission between a driven axle of a door actuator and an assembly surface, includes a hinge, a fastening arrangement designed for fastening the hinge to the assembly surface, in particular a door, frame or wall, wherein an assembly axis is defined perpendicularly to the assembly surface, and a lever arrangement which is fastened to t...