It is also present in some fish jaws that evolved to take advantage of the force multiplication that the four bar mechanism can provide. Deployable mirror with scissor linkages. By [Catsquisher ...

Consider the mechanism shown below made up of moveable links AB, BD and DE. Link AB is rotating CCW at a constant rate. Point C is the center of rotation for BD, where point C is at the intersection ...

As they described it, the robot moves using a 4-bar linkage mechanism with the motor’s torque “transferred to the arm mechanisms through a pair of bevel gears and a worm drive.” Even cooler ...