Patent ID: 6962177

Claim:
A locking fuel pump fuel dispenser nozzle having: a nozzle connected to a fuel pump and having an elongated spout for insertion into a vehicle filler tube having an annular raised surface therein, said nozzle having a manually actuating valve for controlling the flow of fuel from said fuel pump through said nozzle into said vehicle filler tube, the improvement comprising: a locking mechanism for locking said nozzle spout in said filler tube when filling a vehicle fuel tank, said locking mechanism having at least one locking wedge adapted to extend between an unlocked position and a locked position and a locking wedge activating diaphragm mounted in said nozzle and coupled to said locking wedge to move said locking wedge from an unlocked to a locked position upon fluid pressure being applied thereto and means for holding said wedge in a locked position when fuel flow is cut off until released whereby a fuel dispenser nozzle spout locks into a filler tube whenever fuel is flowing through said nozzle into said vehicle filler tube and fuel tank and immediately after the fuel flow ceases.