pneumatic lock

[LTOP]

Hello all!

I am looking for a lock that is pneumatic.

I have an air supply and all applicable hosing. I would like to know if there is a lock - that works like a door lock in that you can close the door without turning the knob but have to turn the knob to open it.

I would like to know if the lock can be retracted (turning the knob) pneumatically.

I hope this is understood properly. Any help would be great!

-LTOP

 

[Barry1961]

Could you use a single acting cylinder, spring loaded in extended position?

Barry1961