The X-Wing RSRA had this control design, using Coanda effect and slots to control the lift distribution around the rotor, and it had a set of impressive valving and slotted air distribution channels, but no swash plate.
From Wikipedia:
Instead of controlling lift by twisting its blades as more conventional helicopters do, the craft used compressed air fed from the engines and expelled from its blades to generate a virtual wing surface, similar to blown flaps on a conventional platform. Computerized valves made sure the compressed air came from the correct edge of the rotor, the correct edge changing as the rotor rotated.
The program ran into many technical problems, none crippling but many expensive to solve and it was canceled. It is worth noting that the air needed to feed the Coanda slots required an extra engine that did nothing but pump air, making it an interesting swap - remove a swash plate and add an extra engine. Not a very good bargain, IMHO.
http://www.dfrc.nasa.gov/gallery/pho...6-33555-2.html