Fluid handling – Siphons – With flow starting – stopping or maintaining means
Patent
1987-09-23
1989-05-30
Rivell, John
Fluid handling
Siphons
With flow starting, stopping or maintaining means
137147, 137216, 137571, 417192, 417194, 417198, 123514, F04F 500, F04F 544
Patent
active
048341320
ABSTRACT:
A fuel supply system including a fuel tank, a feed conduit through which fuel is pumped from the fuel tank, and a return conduit through which excess fuel is returned to the fuel tank. The fuel tank has first and second sumps. The system comprises an ejector pump having a pressure chamber opening through a throat into the first sump. The pressure chamber is connected through a communication conduit to the second sump. The ejector pump includes a fuel nozzle having an inlet port connected to the return conduit and a discharge end opening into the pressure chamber for discharging a jet of fuel into the pressure chamber to create a negative pressure in the pressure chamber so as to suck fuel through the communication conduit from the second sump. In one aspect of the invention, a relief valve is provided which is responsive to a back pressure produced in the fuel nozzle for relieving the back pressure to the first sump when the back pressure exceeds a predetermined value. In another aspect of the invention, the fuel nozzle is designed to diffuse the fuel discharged therefrom over the cross-sectional area of the throat. In still another aspect of the invention, the throat has a length and an inner diameter to provide a length-to-diameter ratio ranging from 2 to 8.
REFERENCES:
patent: 1619808 (1927-03-01), Bracke
patent: 2171579 (1939-09-01), Loughridge
patent: 2953156 (1960-09-01), Bryant
patent: 3455324 (1969-07-01), Bieri et al.
patent: 3881457 (1975-05-01), Benner et al.
patent: 4503885 (1985-03-01), Hall
patent: 4595344 (1986-06-01), Briley
Matsuki Toshiyuki
Ohno Junya
Ozaki Katsunori
Sasaki Michiaki
Yamamoto Kiyokazu
Jidosha Denki Kogyo Kabushiki Kaisha
Nissan Motor Company Limited
Rivell John
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