ahh.. thanks, found it now
Also nick named "Robo Tug" it seems;
http://www.schopf-gse.com/products/t.../powerpush.php
http://findarticles.com/p/articles/m...i_mark06007094
Here's how the Robo-Tug works. While the jet is parked at the gate, an employee manually drives the Robo-Tug behind the aircraft's main landing gear assembly (under the left wing). The unit attaches to the gear where it can turn the wheels of the aircraft by means of four hydrostatically-driven friction rollers. Once the unit is connected, the agent uses a hand-held remote control unit to remotely activate the Robo-Tug and push the aircraft back from the Jetway. When it reaches a predetermined point, the pilot is given a signal via headset, to begin turning the aircraft. After the turn is completed, the employee remotely disengages the Robo-Tug and backs it behind the aircraft, so the aircraft can safely taxi to the runway. Then, the gate agent manually drives the Robo-Tug back to the Jetway and parks it for the next push.
Cheers,
M