Patent attributes
A control lever of a working machine having a main operating frequency includes, a tube having a mass and a length extending from a first end to a second end. The tube defines a lumen extending from the second open end towards the first end of the tube. The control lever includes a rod having a predetermined mass and a length extending from a first end to a second end. The rod is fixed to the tube and is disposed in the lumen at a predetermined position with respect to the second end of the tube. In embodiments, the mass of the rod is determined based at least on the mass of the tube and the main operating frequency of the working machine, and the control lever has a natural frequency that is less than the main operating frequency of the working machine.