Yes, do a google search on venturi gas injection.

In English:

Nice pics:

Venturi Injection vs Bubble Diffusers - venturi injection with ozone - bubble diffusers ozone

Venturi effect - Wikipedia, the free encyclopedia

and

Mazzei Injector Corp. - How a Mazzei Injector Works

The good thing about them: no decrease in efficiency/no cleaning, this is not true for glass diffusers etc! They need cleaned and sit inside the tank(Except for the Cal labs model).

No moving parts, high flow and positive suction(no back pressure).
the other good thing, they reduce flow, but not very much compared to many other in line devices.

They are small.

Regards,
Tom Barr