N/A Hamer-less design? Animation?

[Airgun Al]

Can anyone describe, in a simple manner, how a "HAMMERLESS" PCP funtions?
Perhaps a link to a animation of some sort ???
What exactly opens the airflow, momentarily, in a hammerless design?
Thanks in advance.

 

[Pale_Rider]

When you pull the trigger a sear releases a striker which allows the valve to open letting air flow to the projectile. The pressure drops within the receiver block allowing a second valve to impede air flow while the striker is pushed back against a spring which returns it to the starting position.