Ring Of Saturnus Under Gravity

The ring of Saturnus experienced gravity from mother planet, but why it never collapse (or falling down)? It is not like the moon that have definite orbital velocity. It is something different.

The ring of Saturnus experienced gravity from mother planet, but why it never collapse (or falling down)? It is not like the moon that have definite orbital velocity. It is something different.

The individual components of the rings are like moons that have definite orbital velocity.
They are all orbiting their planet.

Why should they fall?

What/where is Saturnus?  If you meant Saturn, then, they are orbiting not stationary.