EP3697559A2 - METHOD FOR PRODUCING ONE OR MORE CONCAVE CUT-OUTS ON A MAIN BODY WHICH IS, IN PARTICULAR, SUBSTANTIALLY CYLINDRICAL, MORE PARTICULARLY ON AN ARMATURE OR A KEEPER PLATE; ARMATURE, PUSH ROD, OR KEEPER PLATE, HAVING ONE OR MORE CUT-OUTS PRODUCED ACCORDING TO SAID METHOD; AND ELECTROMAGNETIC ACTUATOR COMPRISING AN ARMATURE, PUSH ROD AND/OR A KEEPER PLATE OF THIS TYPE | Patent Bear