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Publication numberUS20010028173 A1
Publication typeApplication
Application numberUS 09/814,947
Publication dateOct 11, 2001
Filing dateMar 23, 2001
Priority dateMar 23, 2000
Also published asCA2341944A1, CA2341944C, DE60108285D1, DE60108285T2, EP1136326A1, EP1136326B1, US6454326
Publication number09814947, 814947, US 2001/0028173 A1, US 2001/028173 A1, US 20010028173 A1, US 20010028173A1, US 2001028173 A1, US 2001028173A1, US-A1-20010028173, US-A1-2001028173, US2001/0028173A1, US2001/028173A1, US20010028173 A1, US20010028173A1, US2001028173 A1, US2001028173A1
InventorsFrancis Demarquilly, Jean-Jacques Laporte
Original AssigneeFrancis Demarquilly, Jean-Jacques Laporte
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Device for protecting a vehicle against impact
US 20010028173 A1
Abstract
A device for protecting a vehicle against impact, the device comprising an inflatable element presenting, once inflated, a bearing surface in contact with the region of the vehicle to be protected, and an impact surface designed to receive the impact directly, wherein said inflatable element includes localized flexible connection elements connecting holding points of the impact surface with fastening points of the bearing surface.
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Claims(8)
1. A device for protecting a vehicle against impact, the device comprising an inflatable element presenting, once inflated, a bearing surface in contact with the region of the vehicle to be protected, and an impact surface designed to receive the impact directly, wherein said inflatable element includes localized connection elements connecting holding points of the impact surface with fastening points of the bearing surface.
2. A vehicle protection device according to
claim 1
, wherein said fastening points are disposed on the bearing surface in such a manner that the connection elements slope relative to the normal at the bearing surface.
3. A vehicle protection device according to
claim 2
, wherein a plurality of fastening points, spaced apart over the bearing surface, are connected by connection elements to the same holding point, or to a plurality of holding points that are close to one another.
4. A protection device according to
claim 1
, wherein said connection elements are non-stretch.
5. A protection device according to
claim 4
, wherein said connection elements are lines.
6. A protection device according to
claim 5
, wherein said connection elements are straps.
7. A protection device according to
claim 1
, wherein said connection elements are disposed inside the inflatable element.
8. A protection device according to
claim 1
, wherein said connection elements are disposed outside the inflatable element.
Description

[0001] The invention relates to a device for protecting a vehicle against impact, and more particularly to a device comprising an inflatable element which, once inflated, presents a general shape that fits closely over the region of the vehicle to be protected. The protection device of the invention preferably applies to the railway industry, in particular to trams or the like, for which the inflatable protection element is particularly bulky.

BACKGROUND OF THE INVENTION

[0002] Document FR 2 420 456 discloses using an inflatable protective cushion at the front of a railway vehicle to dampen shock during impact with a human being or any other obstacle. However, when the direction of impact is not perpendicular to the tangential plane of the inflatable element, such a large-volume inflatable cushion has the drawback of deforming in uncontrolled manner and can slide laterally relative to the front face of the vehicle, possibly sliding past the impact zone without providing its damping function.

[0003] It is known from document FR 2 764 845 to remedy that drawback by using a protective device including a plurality of inflatable elements disposed side-by-side and having a general shape that enables them to interfit laterally with both adjacent inflatable elements. The inflatable elements that are not directly subjected to the impact thus block deformation of the inflatable element(s) that are directly subjected to the impact and prevent the inflatable elements from moving out of the way. However, such a device has the drawback of being complex to implement.

OBJECT AND SUMMARY OF THE INVENTION

[0004] The object of the present invention is thus to propose a device for protecting a vehicle against impact, the device comprising an inflatable element which has good lateral stability against impact, in such a manner as to prevent the inflatable element from moving laterally when the direction of impact is not perpendicular to the tangential plane of the inflatable element, and which is simple and cheap to make.

[0005] The invention provides a device for protecting against impacts, the device comprising an inflatable element presenting, once inflated, a bearing surface in contact with the region of the vehicle to be protected, and an impact surface designed to receive the impact directly.

[0006] In the invention, the inflatable element includes localized connection elements connecting holding points of the impact surface with fastening points of the bearing surface.

[0007] According to another characteristic of the invention, the fastening points are disposed on the bearing surface in such a manner that the connection elements slope relative to the normal at the bearing surface.

[0008] According to yet another characteristic of the invention, a plurality of fastening points, spaced apart over the bearing surface, are connected by connection elements to the same holding point, or to a plurality of holding points that are close to one another.

BRIEF DESCRIPTION OF THE DRAWING

[0009] The objects, characteristics, and advantages of the present invention will be better understood on reading the following description of an embodiment of the invention, given by way of non-limiting example, and with reference to the accompanying drawing, in which:

[0010]FIG. 1 is a diagrammatic view from above of a railway vehicle fitted with a protection device of the invention, when the inflatable element is in the deployed position, shortly before impact;

[0011]FIG. 2 is a view similar to FIG. 1 at the moment of diagonal impact with a vehicle; and

[0012]FIG. 3 is a view similar to FIG. 2 a few moments later.

MORE DETAILED DESCRIPTION

[0013] To make the drawing easier to understand, only the elements necessary for understanding the invention are shown. In addition, the skin of the inflatable element of the protection device is shown as being transparent in FIGS. 1 to 3 in order to show the elements contained inside the inflatable element and to facilitate understanding of the invention.

[0014]FIG. 1 shows a railway vehicle 5 of the tram type fitted with a device for protecting it against impacts, the device being constituted by a large-volume inflatable element 1 including a fabric skin which, once deployed, is a close fit over the front face of the vehicle to be protected.

[0015] In FIG. 1, the inflatable element 1 presents a bearing surface 7 resting in contact with the front face of the tram 5, and an impact surface 8 facing towards the front of the vehicle.

[0016] The inflatable element 1 contains localized lines 2 made of non-stretch fabric, connecting holding points 8 a of the impact surface 8 to fastening points 7 a of the bearing surface 7, the lines 2 being fastened to the points 7 a and 8 a by fixing means that provide good resistance to traction forces, e.g. by stitching or adhesion.

[0017] Each holding point 8 a is connected by a line 2 to at least one fastening point 7 a, the fastening point being selected on the bearing surface 7 in such a manner that the line 2 slopes relative to the normal at the bearing surface 7. Each holding points 8 a is advantageously connected to two or three fastening points 7 a disposed on the bearing surface 7 in such a manner that the lines 2 slope in complementary directions, ensuring lateral and vertical stabilization of the holding point 8 a.

[0018] The bearing surface 7 of the inflatable element 1 is preferably held on the front face of the tram 5 by fastening straps (not shown), the fastening straps preferably being disposed at the lateral ends of the front face of the tram 5.

[0019] The operation of the protection device is described below:

[0020] Under normal working conditions, the inflatable element 1 is in a folded state at the front of the tram 5, inside a compartment provided for this purpose. when the risk of a collision is detected, either automatically, or following the intervention of a driver, compressed gas is injected into the inflatable element 1, which, under the pressure, deploys instantly in front of the front face of the tram 5. The protection device is thus ready to cushion the impact against any object, the fabric skin of the inflatable element 1 is porous, or has calibrated openings, enabling the air to be expelled progressively during impact.

[0021] In FIG. 2, when a vehicle 10 hits the inflatable element 1 on one side of the tram 5, the inflatable element 1 deforms locally at its impact surface 8. The displacement of the impact surface 8 is accompanied by slackening of the lines 2 that slope so as to be subjected to compression forces, and by stiffening of the lines 2 that are subjected to traction forces. The stiffening of the lines 2 thus enables the impact surface 8 to be displaced towards the axis of the tram 5, by said lines pivoting about their fastening points 7 a, but limits the lateral and vertical displacement of the impact surface 8, thus preventing the inflatable element 1 from moving out of the way.

[0022] In FIG. 3, when the vehicle 10 continues to advance the inflatable element 1 is compressed even further but remains stabilized in the impact zone of the vehicle, thereby enabling the impact to be dampened.

[0023] Naturally, the invention is not limited to the embodiment described and shown which has been given only by way of example.

[0024] Thus, in the example shown, the connection lines are disposed inside the skin of the inflatable element. However, in a variant of the invention (not shown), the connection lines could be disposed outside the skin of the inflatable element, e.g. passing over the length of the surface of the inflatable element. Such a variant can be made using a large-mesh net inside which the inflatable element is deployed.

[0025] Thus, the connection lines could be replaced by straps or any other equivalent means.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6499796 *Dec 14, 1999Dec 31, 2002Erik Jeroen EenhoornArrangement for a vehicle or part of a vehicle
US7140478Aug 13, 2004Nov 28, 2006General Motors CorporationReversibly expandable energy absorbing assembly utilizing actively controlled and engineered materials for impact management and methods for operating the same
US7350851Mar 8, 2005Apr 1, 2008Gm Global Technology Operations, Inc.Reversibly expandable energy absorbing assembly and methods for operating the same
US7461877 *Apr 10, 2006Dec 9, 2008Pauline Elizabeth BaileyBumper protection system
Classifications
U.S. Classification293/107
International ClassificationB60R21/2338, B60R21/233, B61F19/06, B60R19/20, B61F19/04, B60R21/00, B61D15/06, B60R21/16
Cooperative ClassificationB60R21/2338, B60R2021/23382, B61F19/06, B61D15/06, B60R19/205, B60R2021/009
European ClassificationB60R21/2338, B61D15/06, B60R19/20C, B61F19/06
Legal Events
DateCodeEventDescription
Mar 20, 2014FPAYFee payment
Year of fee payment: 12
Jan 13, 2014ASAssignment
Owner name: ALSTOM TRANSPORT TECHNOLOGIES, FRANCE
Effective date: 20130331
Free format text: CONFIRMATIVE DEED OF TRANSFER OF OWNERSHIP;ASSIGNOR:ALSTOM TRANSPORT SA;REEL/FRAME:031980/0523
Jan 8, 2014ASAssignment
Free format text: CONFIRMATIVE DEED OF ASSIGNMENT;ASSIGNOR:ALSTOM;REEL/FRAME:031938/0577
Owner name: ALSTOM TRANSPORT SA, FRANCE
Effective date: 20061016
Mar 18, 2010FPAYFee payment
Year of fee payment: 8
Mar 16, 2006FPAYFee payment
Year of fee payment: 4
May 16, 2001ASAssignment
Owner name: ALSTOM, FRANCE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DEMARQUILLY, FRANCIS;LAPORTE, JEAN-JACQUES;REEL/FRAME:011810/0943;SIGNING DATES FROM 20010502 TO 20010503
Owner name: ALSTOM 25, AVENUE KLEBER 75116 PARIS FRANCE
Owner name: ALSTOM 25, AVENUE KLEBER75116 PARIS, (1) /AE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DEMARQUILLY, FRANCIS /AR;REEL/FRAME:011810/0943;SIGNING DATES FROM 20010502 TO 20010503