Fluid handling – Systems – With pump
Reexamination Certificate
2001-03-06
2003-07-08
Michalsky, Gerald A. (Department: 3753)
Fluid handling
Systems
With pump
C137S590000
Reexamination Certificate
active
06588451
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a holding structure for holding a device, such as a fuel pump, on a fuel tank mounted on a water craft or a vehicle.
2. Description of the Related Art
A fuel tank mounted on, for example, a water craft is formed of a resin in recent years with a view to forming the fuel tank in a lightweight structure and facilitating work for mounting the fuel tank on the water craft.
FIG. 5
shows a conventional holding structure for holding a fuel pump on a fuel tank of a resin. When forming a fuel tank
30
, a reinforcing metal ring
39
is embedded in the brim of a pump receiving hole
38
formed in the fuel tank
30
by an insert molding method. A flange
32
welded to the outer circumference of a fuel pump
31
is fastened to the brim of the pump receiving hole
38
with screws
40
screwed in internal thread of the metal ring
39
. A rubber sealing ring
41
is placed between the flange
32
and the brim of the pump receiving hole
38
. A prior art holding structure for holding a device on a tank is disclosed in, for example, JP-U No. Sho 62-497.
This holding structure, however, is complicated and increases steps of a molding process for forming the fuel tank
30
because the metal ring
39
must be embedded in the brim of the pump receiving hole
38
. Consequently, the holding structure is costly. Since the holding structure is rigid, vibrations generated by an engine and transmitted through the hull of the water craft to the fuel tank are transmitted easily to the fuel pump
31
.
SUMMARY OF THE INVENTION
The present invention has been made in view of the aforesaid problems and it is therefore an object of the present invention to provide a holding structure for holding a device on a fuel tank, capable of being fabricated by small man-hours, having simple construction and excellent in vibration isolating performance.
To achieve the object, the present invention provides a holding structure for holding a device inserted in a fuel tank on the fuel tank of a resin, comprises: a holding tube formed integrally with the fuel tank so as to surround an opening formed in the fuel tank; an elastic boot put on the holding tube so as to be in close contact with the outer circumference of the holding tube and the outer circumference of a part of the device inserted through the opening in the fuel tank, extending outside from the holding tube; and a fastening device for fastening the elastic boot to the respective outer circumferences of the holding tube and the device.
The holding structure of the present invention does not increase man-hours necessary for forming the fuel tank, is simple in construction and can be manufactured at a low cost. Since the elastic boot holds the device on the fuel tank, the vibrations of the fuel tank are absorbed and damped by the elastic boot and are propagated hardly to the fuel pump.
Preferably, a main case of the device is provided with a flange, a cap closing one end of the main case is provided with a flange, the flanges are joined together to connect the main case and the cap, and the flange of the main case rests on the end surface of the holding tube. Thus, the holding structure facilitate correctly locating the device on the fuel tank.
REFERENCES:
patent: 2956586 (1960-10-01), Zeigler et al.
patent: 4304530 (1981-12-01), Gens
patent: 6302144 (2001-10-01), Graham et al.
patent: 62-497 (1987-01-01), None
Asakura Yukio
Kuroshita Kazuhisa
Ozaki Atsufumi
Kawasaki Jukogyo Kabushiki Kaisha
Michalsky Gerald A.
Oliff & Berridg,e PLC
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