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US 2003/0192599 A1Published application
Fuel pump apparatus
AssigneeNone recorded
InventorAkira Aoyama
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AssigneeNone recorded
InventorAkira Aoyama
Estimating the term…
A fuel pump apparatus is made free from the influence of height fluctuations of the surface of fuel in a fuel tank by providing a fuel inlet window in the side wall of a float chamber for containing a fuel gauge, which is provided inside the side wall of a housing. The fuel inlet window provides communication between the float chamber and the fuel storage chamber in the fuel tank. Even when there are height fluctuations of the surface of fuel in the fuel tank due to vibrations or turning during running of the automobile, the height fluctuations of the fuel surface are damped in the float chamber because the fuel inlet window acts as a buffer to prevent direct influence of the height fluctuations of the fuel surface.
A fuel pump apparatus comprising:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Backward citations are indexed for grants only.
Submerged in fuel, e.g. in reservoir: the pump being installed in a sub-tank
Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm:…
By floats: characterised by means to prevent fault-level readings due to turbulence of the fluid, e.g. special float housings
Using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements: using electrically actuated indicating means
Term end not estimated
1. Field of the Invention
The present invention relates to a fuel pump apparatus for use in an automobile or the like. More particularly, the present invention relates to a fuel pump apparatus in which a fuel pump integrated with a fuel gauge is installed in a fuel tank.
2. Discussion of Related Art
FIG. 1 is a front view of a fuel pump apparatus according to a first embodiment of the present invention.
FIG. 2 is a sectional view taken along the line I-I in FIG. 1, showing the fuel pump apparatus according to the first embodiment of the present invention.
FIG. 3 is a sectional view taken along the line II-II in FIG. 1, showing the fuel pump apparatus according to the first embodiment of the present invention.
[First Embodiment]
A first preferred embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, a fuel tank 1 is formed in a box-like shape by joining together an upper casing member 1a and a lower casing member 1b, which are produced from a steel or synthetic resin material. Thus, a fuel storage chamber 1c is formed in the fuel tank 1. The upper casing member 1a is provided with an opening 2. A fuel pump apparatus 3 is fitted into the opening 2 and hermetically secured to the upper casing member 1a with screws 4 or the like. A fuel inlet window 5 is provided in the side wall of a housing 6 (i.e. the side wall of a float chamber 11) in parallel to the axis of the housing 6.
As shown in FIG. 2, the interior of the fuel pump apparatus 3 is divided into a fuel pump chamber 8 and a filter chamber 9 by a wall 7 provided in the housing 6. Further, the fuel pump chamber 8 is separated from a float chamber 11 by a wall 10. A fuel pump 12 is inserted into the fuel pump chamber 8. A motor (not shown) and a pump (not shown) are built in the fuel pump 12. The pump is driven by rotation of the motor to deliver high-pressure fuel.