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US 7,117,903 B1Granted
System for detecting liquid fuel blockages in the vapor return line of a fuel dispenser
AssigneeHirt Combustion
InventorGilbert Castro
Life of this patent
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AssigneeHirt Combustion
InventorGilbert Castro
Estimating the term…
A vapor collection testing device is held in one hand and a fuel dispensing nozzle for a fuel dispensing system to be tested is held in the other hand of an operator. The device is slipped over the spout of the nozzle and pushed against the boot of the nozzle (if so equipped), or otherwise pushed sufficiently over the holes on a bootless nozzle so that the nozzle's flow interlock device is opened. Opening the interlock activates the nozzle's lever, to permit fuel dispensing. Without turning the gasoline dispenser on, the nozzle lever is depressed to open the integral vapor valve. At this point, no gasoline is dispensed, but air is ingested by the nozzle and sent into the gasoline storage tank. The air ingestion can be observed by the device's flow meter, in order to determine if there is a liquid flow blockage in the vapor recovery line of the fuel dispensing system.
A fuel vapor emission control system, comprising:
A testing device for testing the vapor collection efficiency of a fuel vapor emission control system comprising a fuel storage tank, a dispenser having a nozzle having a spout for dispensing fuel into a vehicle, whereby the nozzle is fluidly connected to the fuel storage tank through a coaxial hose and the coaxial hose includes a first flow passage for permitting flow of fuel from the storage tank through said nozzle, and a second flow passage for permitting flow of vapor from the nozzle back to the fuel storage tank, said testing device comprising:
A method for testing the vapor collection performance of a fuel dispenser in a fuel vapor emission control system comprising a fuel storage tank, a dispenser having a nozzle having a spout, wherein the nozzle is fluidly connected to the fuel storage tank by a coaxial hose which includes a first flow passage for permitting flow of fuel from the storage tank through said nozzle, and a second flow passage for permitting flow of vapor from the nozzle back to the fuel storage tank, said method comprising:
Dependencies are inferred from the claim text.