Rotoblock designed a toroidal motor with oscillating pistons that drive connecting rods attached to each of the concentric axes of the two groups of pistons.

-The set we appreciate below in computer design.

“Component Distribution Set”

-In the center, the body that contains the oscillating pistons. In reality they are as we see below.

“Set of pistons in the circular semi-cylinder”

-The two connecting rods oscillate on the small lower crankshaft as we can see in the following illustration.

-According to the tests, when the pistons act in opposite directions to each other, they do not produce vibrations, as their movements counteract each other.

“Detail of the connecting rods and the small crankshaft”

-The actual crank mechanism appears below.

“Mechanism detail”