FR2599102A1 - Endpiece for elastic hanging strips made of composite material - Google Patents
Endpiece for elastic hanging strips made of composite material Download PDFInfo
- Publication number
- FR2599102A1 FR2599102A1 FR8607382A FR8607382A FR2599102A1 FR 2599102 A1 FR2599102 A1 FR 2599102A1 FR 8607382 A FR8607382 A FR 8607382A FR 8607382 A FR8607382 A FR 8607382A FR 2599102 A1 FR2599102 A1 FR 2599102A1
- Authority
- FR
- France
- Prior art keywords
- blade
- layers
- end piece
- fabric
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 10
- 239000004744 fabric Substances 0.000 claims abstract description 20
- 238000011065 in-situ storage Methods 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims description 22
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 3
- 239000012779 reinforcing material Substances 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 239000002759 woven fabric Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
- B60G11/10—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
- B60G11/12—Links, pins, or bushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/366—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers made of fibre-reinforced plastics, i.e. characterised by their special construction from such materials
- F16F1/368—Leaf springs
- F16F1/3683—Attachments or mountings therefor
- F16F1/3686—End mountings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0809—Fabrics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/10—Cords, strands or rovings, e.g. oriented cords, strands or rovings
- B29K2105/101—Oriented
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
L'invention concerne un embout pour lames élastiques de suspension en composite, ladite lame étant constituée par un profil stratifié à fibres longitudinales d'un matériau de renfort dans une résine synthétique, les fibres s'étendant sans coupure d'un bout à l'autre de la lame. The invention relates to an end piece for elastic composite suspension blades, said blade being formed by a laminated profile with longitudinal fibers of a reinforcing material in a synthetic resin, the fibers extending without cutting from one end to the other of the blade.
La lame est généralement terminée par des sections transversales à l'extrémité desquelles il faut adapter une ferrure de liaison avec les supports de roue. On connait par exemple du brevet FR-A- 2 516 455, une liaison au support de roue constituée d'un insert métallique tubulaire comportant un siège sur lequel reposera l'extrémité du pivot de fusée. La fixation de cet insert nécessite le perçage de la lame et par conséquent la coupure d'un certain nombre de fibres. Il est nécessaire en conséquence d'augmenter les dimensions de la lame pour tenir compte de l'affaiblissement dt à la pose de l'insert. The blade is generally terminated by cross sections at the end of which it is necessary to adapt a connection fitting with the wheel supports. We know for example from patent FR-A-2,516,455, a connection to the wheel support consisting of a tubular metal insert comprising a seat on which the end of the rocket pivot rests. The fixing of this insert requires the drilling of the blade and consequently the cutting of a certain number of fibers. It is therefore necessary to increase the dimensions of the blade to take account of the weakening dt when fitting the insert.
On a remédié à cet inconvénient en utilisant des ferrures se présentant sous la forme d'une cage dans laquelle venait s'emboîter l'extrémité de la lame telles, par exemple, celles décrites dans la demande FR-A- 84 17174 déposée au nom de la demanderesse. On élimine ainsi la contrainte imposée par la fabrication d'une lame dont les dimensions des extrémités sont dictées par le type d'insert utilisé. Par contre la ferrure constitue une pièce relativement lourde et esthétiquement peu satisfaisante. La réalisation d'un embout en un matériau similaire à celui de la lame a été envisagé par exemple, du brevet JP-A- 52146 462. t'extrémité de la lame est usinée selon une surface cylindrique concave dans laquelle vient se loger partiellement une bague cylindrique qui est maintenue dans une armature en résine époxy.Un tel dispositif ne peut entre utilisé avec des lames devant supporter à leurs extrémités un effet anti-dévers partiel ou total sans risquer d'arrachement et de délaminage de l'extrémité de la lame. This drawback has been remedied by using fittings in the form of a cage in which the end of the blade fitted, such as, for example, those described in application FR-A- 84 17 174 filed under the name of the plaintiff. This eliminates the constraint imposed by the manufacture of a blade, the dimensions of the ends of which are dictated by the type of insert used. On the other hand, the fitting constitutes a relatively heavy and aesthetically unsatisfactory part. The production of a tip made of a material similar to that of the blade has been envisaged, for example, from patent JP-A-52 146 462. The end of the blade is machined according to a concave cylindrical surface in which is partially housed a cylindrical ring which is held in a frame in epoxy resin. Such a device cannot be used between blades having to support at their ends a partial or total anti-roll effect without risking tearing and delamination of the blade end .
L'invention propose un embout réalisé in situ, en un matériau composite proche du matériau de la lame, faisant corps avec l'extrémité de la lame et évitant le délaminage de la lame. The invention provides an end piece made in situ, of a composite material close to the material of the blade, being integral with the end of the blade and preventing delamination of the blade.
L'embout, selon l'invention, est remarquable en ce qu'il est formé in situ sur au moins une extrémité de la lame de couches de bande à fibres unidirectionnelles recouvrant les faces supérieure et inférieure de la-lame et entourant partiellement la bague, disposées selon le sens longitudinal de la lame, alternativement avec des couches de tissu disposées dans le sens transversal de la lame et recouvrant la ou les couches en sens long et les faces latérales de la lame, les couches étant imprégnées de résine synthétique. The tip according to the invention is remarkable in that it is formed in situ on at least one end of the blade with layers of strip of unidirectional fibers covering the upper and lower faces of the blade and partially surrounding the ring. , arranged in the longitudinal direction of the blade, alternately with layers of fabric arranged in the transverse direction of the blade and covering the layer or layers in the long direction and the lateral faces of the blade, the layers being impregnated with synthetic resin.
Les explications et figures données ci-aprbs à titre d'exemple permettront de comprendre comment l'invention peut autre réalisée0
La figure 9 est une vue de dessus, partiellement arrachée, d'une lame composite équipée d'un embout selon un exemple de réalisation de l'invention.The explanations and figures given below by way of example will make it possible to understand how the invention can other embodied0
Figure 9 is a top view, partially broken away, of a composite blade equipped with a tip according to an exemplary embodiment of the invention.
La figure 2 est une vue de c8té, partiellement arrachée, de la lame et de son embout selon la figure 1. FIG. 2 is a partially cut away side view of the blade and its tip according to FIG. 1.
La figure 3 est une vue en coupe selon le plan de la figure, d'une partie III de la figure 2. FIG. 3 is a sectional view along the plane of the figure, of part III of FIG. 2.
La figure 4 est une vue de c8té partiellement arrachée, d'une lame et de son embout selon un autre exemple de réalisation. Figure 4 is a partially cutaway side view of a blade and its tip according to another exemplary embodiment.
La lame élastique de suspension 1, en matériau composite, partiellement représentée figure 1, est constituée, comme connue, d'un profil à section constante présentant vers au moins une de ses extrémités, dans son plan de symétrie horizontal} une largeur décroissante et dans son plan de symétrie verticale, une hauteur croissante. La lame telle que présentée est prévue pour travailler principalement en flexion dans le plan vertical. The elastic suspension blade 1, made of composite material, partially represented in FIG. 1, is made up, as known, of a profile with constant section having, towards at least one of its ends, in its horizontal plane of symmetry} a decreasing width and in its plane of vertical symmetry, an increasing height. The blade as presented is intended to work mainly in bending in the vertical plane.
Son extrémité est fixée, par exemple, à un support de roue de véhicule par l'intermédiaire d'un axe (non représenté) passant dans une bague cylindrique 2, formant palier, fixée à 11 extrémité de la lame par l'embout 3, en composite, formé in situ.Its end is fixed, for example, to a vehicle wheel support by means of an axis (not shown) passing through a cylindrical ring 2, forming a bearing, fixed at the end of the blade by the end piece 3, composite, formed in situ.
La bague 2 porte à ses extrémités deux collerettes 4 et est logée partiellement selon une génératrice dans une cavité cylindrique fraisée à l'extrémité de la lame et dont l'axe est dans le plan horizontal de symétrie. The ring 2 carries at its ends two flanges 4 and is partially housed according to a generator in a cylindrical cavity milled at the end of the blade and whose axis is in the horizontal plane of symmetry.
La bague est maintenue provisoirement dans son logement cylindrique par collage.The ring is temporarily held in its cylindrical housing by gluing.
On place ensuite une première couche d'une bande tissée, constituée de fibres de renforcement, dans le sens longitudinal de la lame sur les faces supérieure 5 et inférieure 6 de l'extrémité de ladite lame et autour de la bague 2. L'ensemble est enduit de résine avant de recevoir une deuxième couche dirigée dans le même sens. A first layer of a woven strip, consisting of reinforcing fibers, is then placed in the longitudinal direction of the blade on the upper 5 and lower 6 faces of the end of said blade and around the ring 2. The assembly is coated with resin before receiving a second layer facing in the same direction.
Selon une forme de réalisation la bande est constituée de mèches de fibres de verre parallèles, continues,maintenues par un fil de trame lichez La-bande ainsi formée autorise l'écartement uniforme des mèches dans des limites relativement grandes permettant d'adapter la largeur de la bande à la largeur de la surface sur laquelle elle doit être fixée. La bande de mèches permet donc de couvrir les faces trapézoidales supérieure et inférieure de l'extrémité de la lame en conservant le même nombre de fibres pour entourer la bague. Les efforts que supporte la bague sont ainsi intégralement transmis sur toute la largeur de la lame. According to one embodiment, the strip consists of wicks of parallel, continuous glass fibers, held by a weft yarn. The strip thus formed allows the uniform spacing of the wicks within relatively large limits making it possible to adapt the width of the strip to the width of the surface on which it is to be fixed. The strip of wicks therefore makes it possible to cover the upper and lower trapezoidal faces of the end of the blade while retaining the same number of fibers to surround the ring. The forces supported by the ring are thus fully transmitted over the entire width of the blade.
Après avoir placer les deux couches 7 de bande dans le sens longitudinal, on dispose une couche 8 dans le sens transversal. After placing the two layers 7 of tape in the longitudinal direction, there is a layer 8 in the transverse direction.
Dans l'exemple de réalisation de la figure la couche 8 dans le sens travers est formée d'une bande à fibres undirectionnelles dont la direction des fibres fait approximativement un angle droit avec celle de la couche 7 dans le sens long, et on l'imprègne de résine. In the embodiment of the figure, the layer 8 in the transverse direction is formed of a strip of undirectional fibers whose direction of the fibers is approximately a right angle with that of the layer 7 in the long direction, and it is resin impregnated.
On continue ainsi la succession deux couches 7 dans le sens long, une couche 8 dans le sens travers comme le montre la partie arrachée de la figure 2. Les pièces de tissu destinées à former les couches sens travers sont coupées de manière que leurs bords voisins ne forment pas de surépaisseur.We thus continue the succession of two layers 7 in the long direction, a layer 8 in the cross direction as shown in the cutaway portion of Figure 2. The pieces of fabric intended to form the cross direction layers are cut so that their neighboring edges do not form an allowance.
Dans l'exemple représenté, l'embout en composite, formé in situ est formé de dix couches 7 de tissu sens long et de cinq couches 8 de tissu sens travers. In the example shown, the composite tip, formed in situ is formed of ten layers 7 of long fabric and five layers 8 of cross fabric.
L'embout est donc formé sur les faces supérieure 5 et inférieure 6 des extrémités de la lame par des couches croisées à 900 et sur les faces latérales 9 et 10 uniquement par des couches transversales par rapport à la direction des fibres de lame. The end piece is therefore formed on the upper 5 and lower 6 faces of the ends of the blade by layers crossed at 900 and on the lateral faces 9 and 10 only by layers transverse to the direction of the blade fibers.
Selon une autre forme de réalisation et en cas d'efforts de cisaillement non négligeables dans le sens axial de la douille, la bande à fibres unidirection- nelles formant les couches 8 en sens travers, est remplacée par un tissu dont les fils sont croisés, Les fibres sont alors orientées selon un angle donné par rapport à l'axe de symétrie horizontal de la lame afin de reprendre les efforts (figure 4). According to another embodiment and in the event of significant shearing forces in the axial direction of the sleeve, the strip of unidirectional fibers forming the layers 8 in the cross direction is replaced by a fabric whose threads are crossed, The fibers are then oriented at a given angle relative to the horizontal axis of symmetry of the blade in order to take up the forces (Figure 4).
L'armure de ce tissu peut présenter des variantes ou des rythmes différents adaptés à la reprise des efforts qui s'exercent dans les couches 7 en sens long. The weave of this fabric may have variants or different rhythms adapted to the resumption of the forces exerted in the layers 7 in the long direction.
De préférence, on utilise un tissu à armure toile ou sergé croisé.Preferably, a weave fabric or crossed twill is used.
D'une manière générale embout est formé-in situ sur une extrémité de la lame par des couches 7 de bandes, à fibres undirectionnelles recouvrant les faces supérieure 5 et inférieure 6 de la lame en entourant la bague, disposées selon le sens longitudinal de la lame alternativement avec des couches 8 de tissu disposées dans le sens transversal de la lame et recouvrant le ou les couches 7 de tissu en sens long et les faces latérales 9, 10 de la lame. Generally, the end-piece is formed in situ on one end of the blade by layers 7 of strips, with undirectional fibers covering the upper 5 and lower 6 faces of the blade, surrounding the ring, arranged in the longitudinal direction of the blade alternately with layers 8 of fabric arranged in the transverse direction of the blade and covering the layer or layers 7 of fabric in a long direction and the lateral faces 9, 10 of the blade.
te terme tissu est pris dans le sens le plus large à savoir : pour le recouvrement dans le sens longitudinal; de bande à fibres unidirectionnelles; pour le recouvrement dans le sens transversal, de mèche ou de bande à fibres unidirectionnelles de tissu à armure de toile ou de sergé croisé. The term fabric is taken in the widest sense, namely: for covering in the longitudinal direction; unidirectional fiber tape; for covering in the transverse direction, wicking or strip with unidirectional fibers of fabric with weave of canvas or twill.
La couche avec la mèche de fibres unidirectionnelles est formée par bobinage à spires jointives. The layer with the wick of unidirectional fibers is formed by winding with contiguous turns.
La figure 3 montre la succession des couches 7 et 8 en long et en travers des bandes à fibres unidirectionnelles d'une région centrale III de l'embout formé sur la partie supérieure 5 de la lame, la même succession se retrouve à la partie inférieure. Figure 3 shows the succession of layers 7 and 8 along and across unidirectional fiber bands of a central region III of the tip formed on the upper part 5 of the blade, the same succession is found in the lower part .
t'enrobage par les couches 8 travers est limité vers ltextrémité de la lame aux bords des collerettes 4 et la largeur des pièces de tissu des couches travers 8 décroit, de manière à former avec les couches 7 en long de longueur décroissante, un raccordement progressif avec les surfaces de la lame. the coating by the layers 8 through is limited towards the end of the blade at the edges of the flanges 4 and the width of the pieces of fabric of the layers 8 through decreases, so as to form with the layers 7 along decreasing length, a progressive connection with the surfaces of the blade.
Les couches 7 en long maintiennent la bague 2 dans l'extrémité de la lame fraisée à cet effet, et sont maintenues transversalement et au moins pendant la phase de fabrication de l'embout par les collerettes 4, qui, lors de l'utilisation participent avec le collage à la reprise des efforts parallèles à l'axe de la bague 2. The layers 7 in length hold the ring 2 in the end of the blade milled for this purpose, and are held transversely and at least during the manufacturing phase of the endpiece by the flanges 4, which, during use participate with bonding to the resumption of forces parallel to the axis of the ring 2.
il est évident que le nombre des couches ainsi que leur succession peuvent varier sans pour autant sortir du cadre de l'invention. it is obvious that the number of layers and their succession can vary without departing from the scope of the invention.
Claims (7)
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8607382A FR2599102B1 (en) | 1986-05-23 | 1986-05-23 | BIT FOR ELASTIC COMPOSITE SUSPENSION BLADES |
| JP62502653A JPH01500212A (en) | 1986-04-25 | 1987-04-22 | Elastic suspension spring plate with car end connection device |
| DE8787400922T DE3761331D1 (en) | 1986-04-25 | 1987-04-22 | LEAF SPRING EQUIPPED WITH CONNECTING ELEMENTS FOR A VEHICLE SUSPENSION. |
| PCT/FR1987/000133 WO1987006665A1 (en) | 1986-04-25 | 1987-04-22 | Elastic suspension blade provided with end connectors for a vehicle |
| ES87400922T ES2013298B3 (en) | 1986-04-25 | 1987-04-22 | ELASTIC SHEET OF SUSPENSION OF A VEHICLE EQUIPPED WITH CONTERAS. |
| EP87400922A EP0243267B1 (en) | 1986-04-25 | 1987-04-22 | Leaf spring of a vehicle suspension comprising end fittings |
| US07/155,711 US4886254A (en) | 1986-04-25 | 1987-04-22 | Elastic suspension blade provided with end connectors for a vehicle |
| AT87400922T ATE49273T1 (en) | 1986-04-25 | 1987-04-22 | LEAF SPRING EQUIPPED WITH CONNECTORS FOR A VEHICLE SUSPENSION. |
| KR1019870701220A KR880701337A (en) | 1986-04-25 | 1987-04-24 | Resilient Automotive Suspension Springboard with End Connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8607382A FR2599102B1 (en) | 1986-05-23 | 1986-05-23 | BIT FOR ELASTIC COMPOSITE SUSPENSION BLADES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2599102A1 true FR2599102A1 (en) | 1987-11-27 |
| FR2599102B1 FR2599102B1 (en) | 1990-08-24 |
Family
ID=9335547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8607382A Expired - Lifetime FR2599102B1 (en) | 1986-04-25 | 1986-05-23 | BIT FOR ELASTIC COMPOSITE SUSPENSION BLADES |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2599102B1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2292569A1 (en) * | 1974-11-26 | 1976-06-25 | Messerschmitt Boelkow Blohm | CONNECTION ELEMENT FOR CONSTRUCTION PART IN FIBER REINFORCED PLASTIC |
| US3968958A (en) * | 1972-11-30 | 1976-07-13 | Edgewater Corporation | Composite material springs and manufacture |
| DE2731577A1 (en) * | 1977-07-13 | 1979-01-25 | Transformatoren Union Ag | Glass fibre-reinforced laminated plastics leaf spring - has centre laminate with fibres across direction of flexion and parallel outer plies |
| JPS56141435A (en) * | 1980-04-04 | 1981-11-05 | Chuo Spring Co Ltd | Molded leaf spring for automobile |
| EP0132713A1 (en) * | 1983-08-02 | 1985-02-13 | Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung | Article with a connecting element fastened by a loop |
-
1986
- 1986-05-23 FR FR8607382A patent/FR2599102B1/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3968958A (en) * | 1972-11-30 | 1976-07-13 | Edgewater Corporation | Composite material springs and manufacture |
| FR2292569A1 (en) * | 1974-11-26 | 1976-06-25 | Messerschmitt Boelkow Blohm | CONNECTION ELEMENT FOR CONSTRUCTION PART IN FIBER REINFORCED PLASTIC |
| DE2731577A1 (en) * | 1977-07-13 | 1979-01-25 | Transformatoren Union Ag | Glass fibre-reinforced laminated plastics leaf spring - has centre laminate with fibres across direction of flexion and parallel outer plies |
| JPS56141435A (en) * | 1980-04-04 | 1981-11-05 | Chuo Spring Co Ltd | Molded leaf spring for automobile |
| EP0132713A1 (en) * | 1983-08-02 | 1985-02-13 | Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung | Article with a connecting element fastened by a loop |
Non-Patent Citations (1)
| Title |
|---|
| PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 23 (M-111)[901], 10 février 1982; & JP-A-56 141 435 (CHUO HATSUJIYOU K.K.) 05-11-1981 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2599102B1 (en) | 1990-08-24 |
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