A beam is supported at a balance point by a pivot attached at a fixed pivot support.
The beam is movable in cyclic tilting motion about the pivot such that ends of
the beam move vertically in mutually opposing directions. The ends of the beam
pivotally engage vertical arms depending downwardly where each of the arms terminates
at a mixing plate. The mixing plates cause fluid mixing as the beam tilts back
and forth. Mechanical advantage is obtained by the use of gravity through an unbalancing
weight which is moved from one side of the beam to the other mechanically or hydraulically
or the beam is pushed to cause the tilting. Automatic position sensed switching
enables the apparatus to move in automated motion.