A fuel metering unit including a pump having a rotor with a plurality of slots. The pump also includes a pivotally movable cam ring coaxially arranged with respect to the rotor. Vanes are slideably disposed in the slots for maintaining contact with the cam ring during movement thereof. A servovalve has...http://www.google.fr/patents/US6821093?utm_source=gb-gplus-shareBrevet US6821093 - Flow meter
