Pipes and tubular conduits – Combined – With end structure
Patent
1997-07-10
1999-03-23
Ferensic, Denise L.
Pipes and tubular conduits
Combined
With end structure
138121, 138155, 138177, 138178, F16L 1100
Patent
active
058846697
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention is based on a fuel line for fuel delivery devices of motor vehicles.
Such a fuel line is known from DE 42 24 981 A1. In this case components of the fuel delivery device are connected with each other or with the internal combustion engine of the motor vehicle by means of the fuel line. Here the fuel line can be fastened on a connector on the components of the fuel delivery device or the internal combustion engine. In general, fuel lines can be embodied as a flexible hose or as a pipe. Pipes are more advantageous in respect to cost compared with fuel-resistant hoses, but have the disadvantage that for fastening them on the connector either elaborate connection means are required, or their direct fastening on and release from the connector is only possible by means of special mounting or dismounting devices, so that the removal of components of the fuel delivery device or of the fuel line is not possible in a simple manner.
SUMMARY OF THE INVENTION
In contrast in the embodiment of the fuel line in accordance with the invention the fuel line is formed as a pipe which has a contact bead on its exterior circumference near a connector, so that by severing the pipe a new connector can be created by a rest of the pipe which remains on the connector and includes the contact bead.
When the fuel line is designed in accordance with the present invention it has the advantage, that preparations have been made to make the simple removal of components of the fuel delivery device or of the fuel line possible. A new fuel line, for example in the form of a flexible hose, can be fastened on the new connector, which can be produced in a simple manner.
The contact bead of the pipe is formed in a simple manner by the embodiment in which the pipe is formed as a corrugated tube, and the contact bead is constituted by a corrugated section of the pipe.
BRIEF DESCRIPTION OF THE DRAWINGS
Two exemplary embodiments of the invention are represented in the drawings and are explained in more detail in the following description.
FIG. 1 shows portions of a fuel delivery device,
FIG. 2 a pipe of the fuel delivery device in accordance with a first exemplary embodiment, used for fuel delivery and arranged on a connector,
FIG. 3 the connector with the severed pipe arranged on it and the new fuel line fastened on it, and
FIG. 4 the pipe in accordance with a second exemplary embodiment.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A fuel delivery device for motor vehicles, shown in a simplified form in FIG. 1, has a fuel delivery unit 10, which conveys fuel from a reservoir 12 to the internal combustion engine 14 of the motor vehicle. The fuel delivery unit 10 is connected with the internal combustion engine 14 via a fuel line 16, which is fastened on a connector 20 of the fuel delivery unit 10. A return from the internal combustion engine 14 to the reservoir 12 can also be a part of the fuel delivery device, through which excess fuel not used up by the internal combustion engine is returned to the reservoir 12 and which also includes a fuel line 22, which is fastened to a connector 24 on the internal combustion engine 14 and/or on the reservoir 12. A flange 26 can furthermore be a part of the fuel delivery device, by means of which an opening 28 in the reservoir 12 can be closed and which has connectors 30, on which sections of the fuel line 16 and/or 22, which are disposed inside and outside of the reservoir 12, are fastened. Further components can also be part of the fuel delivery device, on which also a fuel line is fastened on a connector.
The embodiment of the fuel line 16, fastened on the connector 20 of the fuel delivery device 10, will be described below by way of example and which can be used in the same manner for all further fuel lines of the fuel delivery device. The fuel line 16 is embodied as a pipe and can be made of a rigid plastic material. The pipe 16 can be embodied corrugated, at least in sections, in the shape of a so-called corrugated tube, so that it is possible to adapt it fle
REFERENCES:
patent: 3838713 (1974-10-01), Tubb
patent: 3875970 (1975-04-01), Fitter
patent: 4768563 (1988-09-01), Kogge et al.
patent: 5037143 (1991-08-01), Sanders et al.
patent: 5143122 (1992-09-01), Adkins
patent: 5259843 (1993-11-01), Watanabe et al.
Ferensic Denise L.
Hook James F.
Robert & Bosch GmbH
Striker Michael J.
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