[djf]

I know, it was just a quick drawing I made. The entire unit rotates, and is housed in something else that has actual combustion chambers or compressed air feeds.

There is no way you can supply mechanical energy to the piston and compress it against the spring and NOT have the unit rotate on you.

That’s what it’s designed to do.

[Jotmo]

But why do you need the spring? I'm just not getting what concept you're going for.

Is it similar to the diagram in post 9?

[count-your-change]

The torque then will be the total compressive force on the springs. Compression of the springs will force the rotor to move so long as the piston is exerting force on the springs.
At every position of rotation when the piston has returned to the top of its cylinder intake and exhaust valves will be needed. Raising the pressure in the cylinders high enough to compress the springs before the rotor turns past the intake and exhaust valving would seem to make the whole device incapable of sustained rotation.
I don't think your design is in any danger of being stolen.

[Old Professer]

What will you do about the inherent imbalance of the rotating mass?

How are spring harmonics damped?

This doesn’t look all that feasible.