FR2607568A1 - Device for guiding the piston rod of a shock absorber - Google Patents

Device for guiding the piston rod of a shock absorber Download PDF

Info

Publication number
FR2607568A1
FR2607568A1 FR8616634A FR8616634A FR2607568A1 FR 2607568 A1 FR2607568 A1 FR 2607568A1 FR 8616634 A FR8616634 A FR 8616634A FR 8616634 A FR8616634 A FR 8616634A FR 2607568 A1 FR2607568 A1 FR 2607568A1
Authority
FR
France
Prior art keywords
shock absorber
rod
bearing
ball joint
damper according
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
Application number
FR8616634A
Other languages
French (fr)
Other versions
FR2607568B1 (en
Inventor
Alain-Charles Chometon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Priority to FR8616634A priority Critical patent/FR2607568B1/en
Publication of FR2607568A1 publication Critical patent/FR2607568A1/en
Application granted granted Critical
Publication of FR2607568B1 publication Critical patent/FR2607568B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3278—Details for lubrication
    • 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
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods
    • F16F9/366—Special sealings, including sealings or guides for piston-rods functioning as guide only, e.g. bushings

Abstract

Shock absorbing device more particularly of the MacPherson type, applied to a motor vehicle suspension. It includes rigid connection means between the rod 10 of the shock absorber and the upper part of its body 1 made up of two concentric cylindrical elements 1-4 determining two enclosures 2-3, making it possible to absorb the transverse loads without decreasing the bearing surface of the said rod 10 on the bearing 13 of the body 1 of the shock absorber. Application to suspensions.

Description

DISPOSITIF DE GUIDAGE DE LA TIGE DE PISTON D'UN AMORTISSEUR
La présente invention se rapporte à un dispositif amortisseur de chocs, plus particulièrement adapté à une suspension de véhicule automobile du type Mac PHERSo\. DEVICE FOR GUIDING THE PISTON ROD OF A SHOCK ABSORBER
The present invention relates to a shock absorbing device, more particularly suitable for a motor vehicle suspension of the Mac PHERSo \ type.

On sait que dans un tel type de suspension, l'amortisseur sert de jambe de force supportant le poids de la caisse du véhicule.We know that in such a type of suspension, the shock absorber serves as a strut supporting the weight of the vehicle body.

A ce titre, il est non seulement soumis à des charges s' exerçant selon son axe, mais également à des charges transversales, résultant notamment du guidage du train solidarisé à sa base.As such, it is not only subjected to loads exerted along its axis, but also to transverse loads, resulting in particular from the guiding of the train secured to its base.

Lorsque ces contraintes latérales deviennent importantes, le transfert de ces charges entre la tige et le corps de 1' amortisseur étant assuré par le piston et la palier, la tige a tendance à fléchir et sa surface d' appui sur le palier du corps porte en coin.When these lateral stresses become significant, the transfer of these loads between the rod and the body of the damper being provided by the piston and the bearing, the rod tends to bend and its bearing surface on the bearing of the body carries corner.

Ceci entraîne une mauvaise répartition des pressions sur les surfaces en présence et donc une tenue en endurance insuffisante, des problèmes d'étanchéité et des transmissions excessives des bruits de roulement dans la caisse.This results in a poor distribution of pressures on the surfaces present and therefore insufficient endurance resistance, sealing problems and excessive transmission of rolling noise in the body.

La présente invention a pour but de pallier les inconvénients ci-dessus et sera décrite à titre d'exemple non limitatif au regard des figures 1 à 5 ci-i ointes, qui se rapportent respectivement: - la figure 1, à une coupe longitudinale de 1' amortisseur selon
1' invention, - les figures 2 et 3, à des coupes transversales respectivement selon A-A
et selon B-B de la figure 1 au niveau du dispositif de guidage de la
tige dans le cylindre, - les figures 4 et 5, à des vues de détails en coupe longitudinale
montrant la lubrification au niveau du dispositif de guidage. The object of the present invention is to overcome the above drawbacks and will be described by way of nonlimiting example with regard to FIGS. 1 to 5 above, which relate respectively: - FIG. 1, to a longitudinal section of 1 shock absorber according
1 invention, - Figures 2 and 3, to cross sections respectively along AA
and according to BB of FIG. 1 at the level of the device for guiding the
rod in the cylinder, - Figures 4 and 5, to detail views in longitudinal section
showing lubrication at the guide device.

En référence à la figure 1, l'amortisseur représenté comporte un cylindre 1 déterminant deux enceintes 2 et 3 pourvues de liquide amortissant, séparées par une cloison cylindrique 4 fermée à son extrémité inférieure par un bouchon 5, supDortant une butée 6 et munie d' ouvertures 7 pour la circulation du liquide entre les deux enceintes 2-3, en particulier lors de la dilatation résultant de son échauffement et de l'introduction de la tige dans le cylindre.Referring to Figure 1, the shock absorber shown comprises a cylinder 1 determining two enclosures 2 and 3 provided with damping liquid, separated by a cylindrical partition 4 closed at its lower end by a plug 5, supDortant a stop 6 and provided with openings 7 for the circulation of the liquid between the two chambers 2-3, in particular during the expansion resulting from its heating and from the introduction of the rod into the cylinder.

La partie supérieure de 1' amortisseur est fermée par un capuchon 5 serti et des moyens d' étanchéité 9 connus en soi, au travers desquels coulisse la tige 10 solidarisée par sa partie haute à la caisse du véhicule non figurée et dont la partie basse comporte un piston 11.The upper part of the damper is closed by a crimped cap 5 and sealing means 9 known per se, through which slides the rod 10 secured by its upper part to the body of the vehicle not shown and the lower part of which comprises a piston 11.

L'amortisseur selon l'invention est remarquable au niveau du guidage de la tige 10 et de la partie supérieure du cylindre 1. Ceci est effectué au moyen d'une rotule 12, à l'intérieur de laquelle se déplace ladite tige 10 compte tenu d' un leu de fonctionnement suffisant et non figuré, coopérant avec un palier 13 de forme correspondante constitué de préférence de deux parties complémentaires supérieure 14 et inférieure 15, facilitant sa fabrication et son assemblage.The damper according to the invention is remarkable at the level of the guide of the rod 10 and of the upper part of the cylinder 1. This is done by means of a ball joint 12, inside which said rod 10 moves taking into account of a sufficient and not shown operating leu, cooperating with a bearing 13 of corresponding shape preferably made up of two complementary upper 14 and lower 15 parts, facilitating its manufacture and assembly.

Ceci constitue donc une liaison rigide entre la tige 1G et le corps du palier 13, présentant l'avantage d'éviter ainsi toute excentricité de l'axe de ces deux éléments.This therefore constitutes a rigid connection between the rod 1G and the body of the bearing 13, having the advantage of thus avoiding any eccentricity of the axis of these two elements.

On notera encore la présence éventuelle des butées de choc 16-17.Note again the possible presence of the shock stops 16-17.

Les coupes de 1' amortisseur représentées aux figures 2 et 3, respectivement selon A-A et selon B-B de la figure 1, montrent la présence à ces niveaux dans la rotule 12 de canaux 20-21, transversaux, disposés à 12D" les uns des autres et décalés entre eux d'un plan sur l'autre. Ils mettent en communication les gorges 22-23 disposées dans les paliers 14-15 avec des gorges 24-25 ménagées dans la face interne de la rotule 12 au regard de la tige 10.The sections of the damper shown in Figures 2 and 3, respectively along AA and along BB of Figure 1, show the presence at these levels in the ball 12 of channels 20-21, transverse, arranged 12D "from each other and offset from one plane to another. They connect the grooves 22-23 arranged in the bearings 14-15 with grooves 24-25 formed in the internal face of the ball 12 facing the rod 10 .

La lubrification de la rotule 12 à la fois au regard de la tige 1, et du palier 13 est effectuée à l'aide de 1' huile constituant le liquide amortissant. The lubrication of the ball joint 12 both with respect to the rod 1, and the bearing 13 is carried out using the oil constituting the damping liquid.

Ceci est illustré aux figures 4 et 5.This is illustrated in Figures 4 and 5.

Considérons le cas d'un mouvement ascensionnel de la tige 10 et de son piston 11 (figure 4). Dans ce cas, l'huile constituant le liquide amortissant est mise sous pression dans la partie supérieure de 1' enceinte 2 située au-dessus du piston 11 ; elle remonte alors via le )eu 27 situé entre la butée 16 et la tige 10, les rainures 26 de l'élément de palier 15 faisant face à la rotule 12, parvient dans la gorge 23 dudit palier, traverse les canaux 21 de ladite rotule, aboutit dans la rainure 24 de cette dernière, poursuit son ascension par le jeu ménagé entre la tige 10 et la rotule 12 iusqu'au point d'étanchéité 9 : l'huile amorce alors sa descente vers le bas de l'amortisseur par le canal périphérique de retour 25 jusque dans I'enceinte 3 qui communique avec l'enceinte 2 par les ouvertures 7.Consider the case of an upward movement of the rod 10 and its piston 11 (Figure 4). In this case, the oil constituting the damping liquid is pressurized in the upper part of the enclosure 2 situated above the piston 11; it then rises via the) eu 27 located between the stop 16 and the rod 10, the grooves 26 of the bearing element 15 facing the ball 12, reaches the groove 23 of said bearing, crosses the channels 21 of said ball , ends in the groove 24 of the latter, continues its ascent by the clearance provided between the rod 10 and the ball 12 until the sealing point 9: the oil then begins its descent to the bottom of the damper by the peripheral return channel 25 as far as enclosure 3 which communicates with enclosure 2 through the openings 7.

Parallèlement, l'huile redescent également vers l'enceinte 3 de l'amortisseur, en empruntant les canaux 21 traversant la rotule 12, puis la gorge 22 et l'ouverture 31 ménagées dans l'élément supérieur de palier 14 et enfin le canal vertical 30. At the same time, the oil also redescends towards the enclosure 3 of the shock absorber, using the channels 21 passing through the ball joint 12, then the groove 22 and the opening 31 formed in the upper bearing element 14 and finally the vertical channel 30.

On remarque qu' au cours de ce circuit résultant de la montée du piston 11, un flux d' huile parcourt bien les interfaces situées entre 1' élément de palier 15 et la rotule 12 ainsi qu'entre l'intérieur de cette dernière et la tige 10. It is noted that during this circuit resulting from the rise of the piston 11, a flow of oil runs through the interfaces between the bearing element 15 and the ball joint 12 as well as between the interior of the latter and the rod 10.

Lors de la descente du piston (figure 5), 1' huile amortissante est dans ce cas en surpression dans la partie inférieure de l' enceinte 2, en dessous du piston 11 : elle passe dans l'enceinte 3 et remonte via le canal 30 et l'ouverture 31 dans l'élément de palier 15 pour aboutir dans la rainure 22 de l'élément de palier 14, puis dans les canaux 20 lusqutà la rainure 24 située face à la tige 15 ; celle-ci est remontée selon la flèche iusqu'au niveau du joint d'étanchéité 9 ; le liquide amortissant commence alors sa redescente via le canal de retour 25 et aboutit dans l' enceinte 3 où elle est recyclée.During the descent of the piston (FIG. 5), the damping oil is in this case in overpressure in the lower part of the enclosure 2, below the piston 11: it passes into the enclosure 3 and rises via the channel 30 and the opening 31 in the bearing element 15 to terminate in the groove 22 of the bearing element 14, then in the channels 20 lusqutà the groove 24 situated opposite the rod 15; this is raised according to the arrow iusqu'à level of the seal 9; the damping liquid then begins to descend via the return channel 25 and ends in the enclosure 3 where it is recycled.

On notera que, sur ce trajet, les interfaces situées entre l'élément de palier 14 et la rotule 12 d'une part, et entre l'intérieur de cette dernière et la tige 10 d'autre part, sont bien lubrifiées.  It will be noted that, on this path, the interfaces located between the bearing element 14 and the ball joint 12 on the one hand, and between the interior of the latter and the rod 10 on the other hand, are well lubricated.

On voit que, selon le système de guidage de l'invention, la surface de contact entre la tige 10 et le palier 13 le supportant sur le corps 1 de l'amortisseur demeure constante, même sous l'action de charges transversales créant un couple entre ces deux éléments. It can be seen that, according to the guidance system of the invention, the contact surface between the rod 10 and the bearing 13 supporting it on the body 1 of the shock absorber remains constant, even under the action of transverse loads creating a couple between these two elements.

Claims (7)

REVENDICATIONS 1/ Dispositif amortisseur de chocs plus particulièrement du tyne ac 1 / Shock absorber device more particularly of tyne ac PHERSON, appliqué à une suspension de véhicule automobile, PHERSON, applied to a motor vehicle suspension, caractérisé par le fait qu'il comporte des moyens de liaison rigide characterized by the fact that it comprises rigid connection means entre la tige (1û) de l'amortisseur et la partie supérieure de son corps between the shock absorber rod (1û) and the upper part of its body (I) constitué de deux éléments cylindriques concentriques (1-4) (I) consisting of two concentric cylindrical elements (1-4) déterminant deux enceintes (2-3), permettant d' encaisser les charges determining two enclosures (2-3), allowing to collect the charges transversales sans diminution de la surface d' appui de ladite tige (ire)  transverse without reducing the bearing surface of said rod (ire) sur le palier (13) du corps (1) de l'amortisseur. on the bearing (13) of the body (1) of the shock absorber. 2/ Amortisseur selon la revendication 1, caractérisé en ce que les moyens2 / damper according to claim 1, characterized in that the means de liaison rigide situés entre la partie supérieure du corps (I) de rigid connection located between the upper part of the body (I) of l'amortisseur et la tie (ire) sont constitués d'une rotule (12) the shock absorber and the tie (ire) consist of a ball joint (12) présentant une ouverture axiale à l'intérieur de laquelle se déplace la having an axial opening inside which the tige (10), ladite rotule (12) coopérant avec un palier (13) de forme rod (10), said ball joint (12) cooperating with a form bearing (13) correspondante, solidaire de la partie supérieure du corps de corresponding, secured to the upper part of the body I' amortisseur. The shock absorber. 3/ Arnortisseur selon les revendications I et 2, caractérisé en ce que le3 / shock absorber according to claims I and 2, characterized in that the palier (13) est composé d'une partie supérieure (14) et d'une partie bearing (13) is composed of an upper part (14) and a part inférieure (15), comportant chacune une gorge périphérique interne lower (15), each comprising an internal peripheral groove respectivement (22-23). respectively (22-23). 4/ Amortisseur selon la revendication 3, caractérisé en ce que la partie4 / damper according to claim 3, characterized in that the part inférieure (15) du palier (13) est percée d'un canal de retour (28) de lower (15) of the bearing (13) is pierced with a return channel (28) of l'huile d'amortissement et d'une ouverture (31) débouchant sur un damping oil and an opening (31) leading to a canal (30) situé dans 1' enceinte (3) ménagée entre les deux enceintes channel (30) located in one enclosure (3) formed between the two enclosures (2-3) de 1' amortisseur et cornporte des rainures (26). (2-3) of the shock absorber and includes grooves (26). 5/ Amortisseur selon la revendication 2, caractérisé en ce que la rotule5 / damper according to claim 2, characterized in that the ball joint (12) comporte, au droit des rainures (24-25) et dans un plan (12) comprises, in line with grooves (24-25) and in a plane perpendiculaire à la tige (in), des canaux (2O-21) disposés à 1200 les perpendicular to the rod (in), channels (2O-21) arranged at 1200 uns des autres et décalés d'un plan sur l'autre, aboutissant from each other and shifted from one plane to another, resulting in respectivement aux rainures (22-23) du palier (13).  respectively to the grooves (22-23) of the bearing (13). 6/ Amortisseur selon la revendication 1, caractérisé en ce que les 6 / damper according to claim 1, characterized in that the mouvements alternatifs du piston (11) dans le cylindre (4) déterminent reciprocating movements of the piston (11) in the cylinder (4) determine des surpressions dans l'huile d'amortissement qui sont utilisées pour overpressures in the damping oil which are used for lubrifier les frottements entre la rotule (12) et respectivement la tige lubricate the friction between the ball joint (12) and the rod respectively (10) et le palier (13). (10) and the bearing (13). 7/ Amortisseur selon la revendication 6, caractérisé en ce qu' un Jeu est7 / shock absorber according to claim 6, characterized in that a clearance is prévu entre la tige (10) et la rotule (12) permettant le passage de provided between the rod (10) and the ball joint (12) allowing the passage of l'huile d'amortisseur entre ces deuy éléments.  shock absorber oil between these two elements.
FR8616634A 1986-11-28 1986-11-28 DEVICE FOR GUIDING THE PISTON ROD OF A SHOCK ABSORBER Expired - Fee Related FR2607568B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8616634A FR2607568B1 (en) 1986-11-28 1986-11-28 DEVICE FOR GUIDING THE PISTON ROD OF A SHOCK ABSORBER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8616634A FR2607568B1 (en) 1986-11-28 1986-11-28 DEVICE FOR GUIDING THE PISTON ROD OF A SHOCK ABSORBER

Publications (2)

Publication Number Publication Date
FR2607568A1 true FR2607568A1 (en) 1988-06-03
FR2607568B1 FR2607568B1 (en) 1991-10-11

Family

ID=9341338

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8616634A Expired - Fee Related FR2607568B1 (en) 1986-11-28 1986-11-28 DEVICE FOR GUIDING THE PISTON ROD OF A SHOCK ABSORBER

Country Status (1)

Country Link
FR (1) FR2607568B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022475A1 (en) * 1990-07-14 1992-01-16 Opel Adam Ag Spring and damper unit for vehicle - has division of bearing gap into high and low pressure zones
WO1992016770A1 (en) * 1991-03-21 1992-10-01 öHLINS RACING AB Device associated with a spring suspension system
US5509514A (en) * 1995-04-14 1996-04-23 General Motors Corporation Gas charging of suspension damper
US6325187B1 (en) * 1999-05-12 2001-12-04 Tenneco Automotive Inc. Dirt wiper system for suspension damper
DE102005060331A1 (en) * 2005-12-16 2007-06-28 Zf Friedrichshafen Ag Damper for vibrations has stepped disk provided with second disk to enlarge its stop surface, which may be fixed to it

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1661248U (en) *
GB715965A (en) * 1952-01-09 1954-09-22 Armstrong S Patents Company Lt Improvements in bearings for use in hydraulic shock absorbers
CH383697A (en) * 1960-02-27 1964-10-31 Janson Fabrieken N V Hydraulic shock absorber
DE1930610U (en) * 1965-10-26 1966-01-05 Hemscheidt Maschf Hermann STEM BEARING AND PISTON GUIDE OF A HYDRAULIC VIBRATION DAMPER.
DE1430515A1 (en) * 1962-07-07 1969-09-04 Bosch Gmbh Robert Hydropneumatic strut
US3621949A (en) * 1969-10-01 1971-11-23 Gen Motors Corp Modified rod guide for cut off shock absorber
GB2013826A (en) * 1978-02-02 1979-08-15 Armstrong Patents Co Ltd Sealing hydropneumatic shock absorbers
GB2111637A (en) * 1981-11-04 1983-07-06 Woodhead Ltd Jonas Hydropneumatic shock absorbers with gas return passage
GB2118272A (en) * 1982-04-10 1983-10-26 Boge Gmbh Two-tube hydropneumatic damper with combined seal/valve

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1661248U (en) *
GB715965A (en) * 1952-01-09 1954-09-22 Armstrong S Patents Company Lt Improvements in bearings for use in hydraulic shock absorbers
CH383697A (en) * 1960-02-27 1964-10-31 Janson Fabrieken N V Hydraulic shock absorber
DE1430515A1 (en) * 1962-07-07 1969-09-04 Bosch Gmbh Robert Hydropneumatic strut
DE1930610U (en) * 1965-10-26 1966-01-05 Hemscheidt Maschf Hermann STEM BEARING AND PISTON GUIDE OF A HYDRAULIC VIBRATION DAMPER.
US3621949A (en) * 1969-10-01 1971-11-23 Gen Motors Corp Modified rod guide for cut off shock absorber
GB2013826A (en) * 1978-02-02 1979-08-15 Armstrong Patents Co Ltd Sealing hydropneumatic shock absorbers
GB2111637A (en) * 1981-11-04 1983-07-06 Woodhead Ltd Jonas Hydropneumatic shock absorbers with gas return passage
GB2118272A (en) * 1982-04-10 1983-10-26 Boge Gmbh Two-tube hydropneumatic damper with combined seal/valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022475A1 (en) * 1990-07-14 1992-01-16 Opel Adam Ag Spring and damper unit for vehicle - has division of bearing gap into high and low pressure zones
WO1992016770A1 (en) * 1991-03-21 1992-10-01 öHLINS RACING AB Device associated with a spring suspension system
US5509514A (en) * 1995-04-14 1996-04-23 General Motors Corporation Gas charging of suspension damper
US6325187B1 (en) * 1999-05-12 2001-12-04 Tenneco Automotive Inc. Dirt wiper system for suspension damper
DE102005060331A1 (en) * 2005-12-16 2007-06-28 Zf Friedrichshafen Ag Damper for vibrations has stepped disk provided with second disk to enlarge its stop surface, which may be fixed to it
DE102005060331B4 (en) * 2005-12-16 2011-02-17 Zf Friedrichshafen Ag vibration

Also Published As

Publication number Publication date
FR2607568B1 (en) 1991-10-11

Similar Documents

Publication Publication Date Title
CA1201733A (en) Shock absorber unit for vehicles
EP0360631B1 (en) Hydropneumatic suspension strut for a vehicle
EP0639726B1 (en) One-piece sealing arrangement by means of a lubricated centering guide for pressurized hydraulic shockabsorbers
FR2773599A1 (en) HYDROPNEUMATIC SPRING
FR2607568A1 (en) Device for guiding the piston rod of a shock absorber
EP0117203A1 (en) Sealing device for a hydraulic energy damper of the telescopic type
FR2487030A1 (en) IMPROVEMENT IN TELESCOPIC HYDRAULIC SHOCK ABSORBERS
CA1312576C (en) Lading protection device
EP0332509B1 (en) Shock absorber with a dynamic sealing
EP1681491B1 (en) Magneto-rheological hydraulic damper
EP0045263A1 (en) Device for damping movement between two sliding parts
FR2739668A1 (en) Hydraulic vehicle shock absorber end plug, especially for pressurised monotube type shock absorbers
EP0045269B1 (en) Oleopneumatic suspension
GB2091841A (en) Valved shock absorber piston
US6357734B1 (en) Suspension damper with vehicle spring preload
FR2463350A1 (en) SHOCK ABSORBER DEVICE FOR NON-RETURN VALVES
FR2813367A1 (en) PISTON-AND-CYLINDER UNIT WITH AT LEAST ONE BY-PASS THROAT IN THE CYLINDER
JPS5983846A (en) Hydraulic buffer
RU2053893C1 (en) Vehicle suspension hydraulic telescopic shock absorber
FR2587773A1 (en) Telescopic hydraulic damper, fitted in particular for damping the oscillations of engines
EP0133105B1 (en) Electro-hydraulic height adjusting device for a motor vehicle
JPS6242873Y2 (en)
EP0186565B1 (en) Hydropneumatic suspension element for a heavy vehicle or for an aircraft undercarriage
FR2487029A1 (en) IMPROVEMENT IN BITUBULAR TELESCOPIC HYDRAULIC SHOCK ABSORBERS
SU796552A1 (en) Hydraulic shock absorber

Legal Events

Date Code Title Description
ST Notification of lapse