Hi,

There is a deadbolt for security, but we also have a roller catch. This holds the door in position even when not locked.

https://www.lockweb.com.au/en/site/lockweb/lockwood-products/mortice-locks/euro-profile-mortice-locks/optimum-hinged-door-roller-bolt-mortice-locks/ 

thanks.... and who would you recommend for this in the US?

Yes, these should be available in any door hardware store. There are many manufacturers around the world. Assa Abloy is one of the worlds leaders.