Land vehicles: bodies and tops – Bodies – Structural detail
Reexamination Certificate
1998-04-16
2001-08-14
Pape, Joseph D. (Department: 3612)
Land vehicles: bodies and tops
Bodies
Structural detail
C296S178000
Reexamination Certificate
active
06273497
ABSTRACT:
The present invention relates to body structures for road or rail vehicles in general, and relates more particularly to a load-carrying structure, to a segment of body structure, and to a vehicle body including such structures.
BACKGROUND OF THE INVENTION
Road or rail vehicle bodies are known in the state of the art.
Document GB 315 685 describes a vehicle framework comprising load-carrying structural elements (a, h, f, p, g) for a vehicle body extending radially to the longitudinal axis of the body and suitable for being associated with structural elements (d) parallel to said longitudinal axis of said body in which said load-carrying structural elements are constituted by at least one flat strip (a, h, f, p, g).
A drawback of that prior art framework is that the load-carrying structure does not make it possible to make non-plane faces in a simple manner.
Document CH 285 666 describes a traditional assembly of hollow section members, the window pier structure also being stiffened by hollow section members.
The embodiment defined is very little used, industrially speaking.
Documents EP 0 605 366 in the name of FIAT FERROVIARIA S.p.A. and EP 0 672 567 in the name of HITACHI LTD relate to a rail vehicle body obtained by assembling hollow section members.
A drawback of that technology is that it requires the hollow section members to have the same length as the vehicle.
Another drawback of that technology is that it is expensive.
Document U.S. Pat. No. 4,353,313 in the name of Centro Ricerche Fiat S.p.A. describes a body structure constituted by assembling together two half-roofs and a lower portion having the length of the body.
The structure extending between two window piers using plane strips that are curved on their edges for stiffening purposes.
A drawback of that technology is that it is complex to implement.
SUMMARY OF THE INVENTION
Thus, an object of the invention is to provide a vehicle body in which the load-carrying structure is lightened and simplified.
Another object of the invention is to provide a vehicle body in which the load-carrying structure makes it possible to provide faces that are not planar.
In other words, an object of the invention is to provide a load-carrying structure and a segment of body structure that can be implemented flexibly, thus making it possible to vary shapes and dimensions.
According to the invention, the load-carrying structure, the segment of body structure, and the vehicle body including such structures are as characterized below.
An advantage of the load-carrying structure, of the segment of body structure, and of the vehicle body including such structures of the invention is that they do not require hollow section members which oxidize and which establish thermal bridges.
Another advantage of the load-carrying structure, of the segment of body structure, and of the vehicle body including such structures of the invention is that it does not require extruded section members in its face, which members are expensive to make and heavy.
Another advantage of the load-carrying structure, of the segment of body structure, and of the vehicle body including such structures of the invention is that it shortens assembly time.
Another advantage of the load-carrying structure, of the segment of body structure, and of the vehicle body including such structures of the invention is that it decreases cost.
Another advantage of the load-carrying structure, of the segment of body structure, and of the vehicle body including such structures of the invention is a reduction in maintenance because there is less corrosion.
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Devallez Alain
Simon Vincent
GEC Alsthom Transport SA
Pape Joseph D.
Sughrue Mion Zinn Macpeak & Seas, PLLC
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