The twin-blade mower beam has contra-rotating upper (3) and lower (4) blades. These are mounted on upper (1) and lower (2) levers which are connected by a pivot (35, 45).doi:DE10246558MAYER, MICHAEL
CIRCUIT BREAKERS WITH PIVOTABLE TWIN BLADESRUDOLF KORBER
The scoop has twin pivoting blades (8, 8') which pivot about the nipple (9) in the grooves (16, 16') against the spring. (12), fixed to the notched ends of the blades. The spring ensures that the blades are open when pushed out of the tube. The scoop has a fixed blade (13)...