I made a pressure bleeder recently when a master cylinder was replaced. The easiest I have ever bled anything? It still took two people, because of a minor problem, but it was sweet!
Take a clip-on tire inflation valve and screw a hose adapter into the threaded fitting. Connect a length of hose to it (clear vinyl tubing from a hardware store workes fine) and run it to the input of a pressure regulator (with a pressure gauge). From the outlet of the regulator, run a hose to a tapered rubber barb (I had one from a hand vacuum pump).
To use, clip the tire valve onto a front tire. Place the barb firmly in the vent port of the reservoir cap and firmly hold it in, raise the regulator pressure to 5 - 15 psi, and bleed away! Don't forget to check and add fluid before the reservoir runs dry!
I had originally glued a hose fitting into the reservoir cap, but the adhesive didn't hold. That's when I switched to the rubber barb technique. On another car, I bought a replacement reservoir cap, added an extra large O-ring to seal it, and mounted a hose fitting to connect the pressure line to. I can bleed the brakes, etc. anywhere and all I have to do is re-check the tire pressure when I'm done!
