Mobile fuel dispenser

A mobile fuel dispenser for carrying combustible liquid fuel and for dispensing the fuel during fuelling of a fuel tank of a vehicle located at a location remote from a fuel refilling station, the mobile fuel dispenser including:

• a fuel dispensing nozzle for dispensing the fuel;
• a primary containment tank for containing the fuel to be dispensed via the fuel dispensing nozzle;
• a vapor recovery nozzle associated with the fuel dispensing nozzle, the vapor recovery nozzle being operable, in use, for recovering vapor from the fuel tank of the vehicle during fueling;
• a sealing mechanism associated with the fuel dispensing nozzle and the vapor recovery nozzle and configured for sealingly engaging the fuel tank in an arrangement permitting substantially vapourless dispensing of the fuel by the dispensing nozzle and recovery of the vapor from the fuel tank via the vapor recovery nozzle;
• a secondary containment tank;
• a pressure release valve connected between the primary containment tank and the secondary containment tank and operable to decrease pressure within the primary containment tank during the recovery of vapour recovered by the vapor recovery nozzle and pumped into the primary containment tank, in use;
• a fuel pump for pumping the fuel from the primary containment tank to the fuel dispensing nozzle;
• a vapor pump for pumping the vapor from the vapor recovery nozzle to the primary containment tank;
• and
• a safety mechanism comprising at least one detector for detecting an undesirable operational parameter of the mobile fuel dispenser, the safety mechanism being operable to stop fuel dispensing in response to detection of said undesirable operational parameter;
• wherein the safety mechanism comprises a control module configured for controlling operation of the fuel pump in response to detection of said undesirable operational parameter by said at least one detector, wherein the undesirable operational parameter detected by the detector is a state of operation of the vapor pump, and wherein the control module is configured to shut off the fuel pump in response to detection by the detector that the vapor pump is not in operation during fuel dispensing operations.