Fuel dispensing apparatus capable of automatically discriminatin

Details Fuel dispensing apparatus capable of automatically discriminatin Fuel dispensing apparatus capable of automatically discriminatin

1993-04-13

1994-05-10

Recla, Henry J.

Fluent material handling, with receiver or receiver coacting mea

With testing or weighing receiver content

141 96, 141392, 141196, 141DIG1, 73 2405, B65B 130, B65B 326

Patent

active

053099575

ABSTRACT:
A fuel dispensing apparatus for automatically discriminating a sort of fuel in a fuel tank of a vehicle in advance of fuelling, by sucking the fuel vapor in the tank into a chamber provided on a fuelling nozzle and accomodating a gas sensor for sensing the vapor introduced into the chamber. The nozzle is further provided with an air ejecter having a base port communicated with an air supplying means through an air hose, a top port for ejecting the air from the base port toward the atmosphere when it is opened, and a side port connected with the gas sensor chamber. A valve body is movably arranged in the nozzle and moved in a forward direction by a nozzle lever and in a backward direction by a pressure of fuel supplied to the nozzle so as to open and close the top port of the air ejector. When the nozzle lever is pulled after the nozzle is inserted into the fuel tank, the valve body is moved in the forward direction to open the top port to the atmosphere, which results in generating negative pressure in the gas sensor chamber which sucks the vapor in the fuel tank into the chamber so as to determine whether the fuelling is allowed or not, and when the valve body is moved backward by the fuel pressure during the fuelling operation, the top port is closed so that the air from the ejector is directed to the gas sensor chamber to sweep the vapor away from the chamber.

REFERENCES:
patent: 4503703 (1985-03-01), Pagel
patent: 4796678 (1989-01-01), Motohashi et al.
patent: 5209275 (1993-05-01), Akiba

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