[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

DE1480465C3 - Suspension for vehicle seats - Google Patents

Suspension for vehicle seats

Info

Publication number
DE1480465C3
DE1480465C3 DE1480465A DEV0028278A DE1480465C3 DE 1480465 C3 DE1480465 C3 DE 1480465C3 DE 1480465 A DE1480465 A DE 1480465A DE V0028278 A DEV0028278 A DE V0028278A DE 1480465 C3 DE1480465 C3 DE 1480465C3
Authority
DE
Germany
Prior art keywords
line
valve
cylinder
hydraulic
hydraulic circuit
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.)
Expired
Application number
DE1480465A
Other languages
German (de)
Other versions
DE1480465B2 (en
DE1480465A1 (en
Inventor
Michel Antoine Emile Jurens Valleiry Haute-Savoie Vuichard (Frankreich)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of DE1480465A1 publication Critical patent/DE1480465A1/en
Publication of DE1480465B2 publication Critical patent/DE1480465B2/en
Application granted granted Critical
Publication of DE1480465C3 publication Critical patent/DE1480465C3/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/50—Seat suspension devices
    • B60N2/501—Seat suspension devices actively controlled suspension, e.g. electronic control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/38—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles specially constructed for use on tractors or like off-road vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/50—Seat suspension devices
    • B60N2/505—Adjustable suspension including height adjustment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/50—Seat suspension devices
    • B60N2/506—Seat guided by rods
    • B60N2/507—Parallelogram-like structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/50—Seat suspension devices
    • B60N2/52—Seat suspension devices using fluid means
    • B60N2/525—Seat suspension devices using fluid means using gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/50—Seat suspension devices
    • B60N2/52—Seat suspension devices using fluid means
    • B60N2/527—Seat suspension devices using fluid means using liquids

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Damping Devices (AREA)
  • Seats For Vehicles (AREA)

Description

Die Erfindung bezieht sich auf eine Abfederung gemäß dem Oberbegriff des Patentanspruchs.The invention relates to a cushioning according to the preamble of the patent claim.

Bei den bekannten Abfederungen dieser Art (US-Patentschrift 31 18 686) ist die den zweiten Zylinderraum mit dem Hydraulikkreis verbindende Leitung an den Flüssigkeitsbehälter des Hydraulikkreises angeschlossen und damit drucklos, und die in der den ersten Zylinderraum mit dem hydropneumatischen Federelement verbindende erste Leitung eingeschaltete Ventilanordnung weist Ventile auf, durch die ein völliges Abschalten des hydropneumatischen Federelements von dem Hydraulikkreis nicht möglich ist. Hierdurch kann es bei einem sehr schnellen Einfedern des Fahrzeugsitzes in dem zweiten Zylinderraum aufgrund der Drucklosigkeit der zweiten Leitung zu Kavitationserscheinungen kommen, und außerdem ist eine genaue Festlegung des Volumens des Hydraulikraums des hydropneumatischen Federelements und damit der Federhärte nicht möglich.In the known suspension of this type (US Pat. No. 31 18 686), which is the second cylinder space with the hydraulic circuit connecting line connected to the fluid container of the hydraulic circuit and thus pressureless, and the one in the first cylinder space with the hydropneumatic spring element connecting the first line switched valve arrangement has valves through which a complete Switching off the hydropneumatic spring element from the hydraulic circuit is not possible. Through this it can be due to a very rapid compression of the vehicle seat in the second cylinder space the depressurization of the second line leads to cavitation phenomena, and moreover is an accurate one Determination of the volume of the hydraulic space of the hydropneumatic spring element and thus the Spring hardness not possible.

Der Erfindung liegt demgegenüber die Aufgabe zugrunde, eine Abfederung der eingangs genannten Art zu schaffen, bei der bei ständig einwandfreier Füllung des zweiten Zylinderraums der dem Sitzträger zugeordneten Kolben-Zylinder-Einheit eine genaue Festsetzung des Volumens des Hydraulikraumes des hydropneumatischen Federelements möglich ist.In contrast, the invention is based on the object of providing a cushioning of the type mentioned at the beginning to create, in the case of continuously perfect filling of the second cylinder chamber of the seat support assigned Piston-cylinder unit a precise determination of the volume of the hydraulic space of the hydropneumatic Spring element is possible.

Diese Aufgabe wird durch die im kennzeichnenden Teil des Patentanspruchs angegebenen Merkmale gelöstThis object is achieved by the features specified in the characterizing part of the claim solved

Die Erfindung ist im folgenden anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert.The invention is described below with reference to an exemplary embodiment shown schematically in the drawing explained in more detail.

Bei der erfindungsgemäßen Abfederung für Kraftfahrzeugsitze ist eine einen ersten Zylinderraum 6 und einen zweiten Zylinderraum 5 aufweisende hydraulische Kolben-Zylinder-Einheit vorgesehen. Die dem die beiden Zylinderräume 6 und 5 trennenden Kolben 3 zugeordnete Kolbenstange 2 ist an ihrem freien Ende fest mit einem Sitzträger 1 verbunden.In the suspension for motor vehicle seats according to the invention, a first cylinder space 6 and a second cylinder chamber 5 having hydraulic piston-cylinder unit is provided. The that the The piston rod 2 assigned to the two cylinder chambers 6 and 5 separating the piston 3 is at its free end firmly connected to a seat support 1.

Der zweite Zylinderraum 5 ist über eine eine aus zwei nebeneinander angeordneten Ventilen, nämlich einemThe second cylinder chamber 5 is one of two adjacently arranged valves, namely one

ίο in Richtung des zweiten Zylinderraumes 5 öffnenden Rückschlagventil 25 und einem einstellbaren Plattenventil 27, bestehende Ventilanordnung aufweisende zweite Leitung 8 an den Hydraulikkreis 10 des Fahrzeugs angeschlossen. Die Leitung 8 ist hierbei mit dem Hydraulikkreis 10 zwischen einem in diesem angeordneten, im normalen Fahrbetrieb offenen Absperrventil 36 und einem diesem nachgeschalteten Druckbegrenzungsventil 15 verbunden.
Der erste Zylinderraum 6 ist über eine erste Leitung 21 mit einem einen Hydraulikraum 22 und ein Gaspolster 23 aufweisenden hydropneumatischen Federelement 20 verbunden. Die erste Leitung 21 steht außerdem mit der ersten Zylinderkammer 32 eines , einen Schwimmkolben aufweisenden Stellzylinders in A Verbindung, dessen zweite Zylinderkammer über eine ein sich in Richtung zur zweiten Zylinderkammer 33 öffnendes Rückschlagventil 35 enthaltende Leitung 34 mit dem Hydraulikkreis 10 vor dem in diesem enthaltenen Absperrventil 36 verbunden ist. Der zweite Zylinderraum 33 ist ferner mit dem Hydraulikkreis 10 über eine nach dem Druckbegrenzungsventil 15 in diesen mündende Leitung 38 verbunden, die ein im normalen Fahrbetrieb geschlossenes Absperrventil 40 enthält. Die Leitung 34 und der nach dem Absperrventil 40 liegende Abschnitt der Leitung 38 sind durch eine ein in Richtung des dem Hydraulikkreis 10 zugeordneten , Flüssigkeitsbehälters 11 öffnendes Sicherheitsventil 46 aufweisende Leitung 45 miteinander verbunden.ίο in the direction of the second cylinder chamber 5 opening check valve 25 and an adjustable plate valve 27, existing valve arrangement having a second line 8 connected to the hydraulic circuit 10 of the vehicle. The line 8 is connected to the hydraulic circuit 10 between a shut-off valve 36, which is arranged in the hydraulic circuit and is open during normal driving operation, and a pressure-limiting valve 15 connected downstream thereof.
The first cylinder space 6 is connected via a first line 21 to a hydropneumatic spring element 20 having a hydraulic space 22 and a gas cushion 23. The first line 21 is also connected to the first cylinder chamber 32 of an actuating cylinder having a floating piston, the second cylinder chamber of which is connected to the hydraulic circuit 10 upstream of the shut-off valve contained therein via a line 34 containing a check valve 35 opening in the direction of the second cylinder chamber 33 36 is connected. The second cylinder chamber 33 is also connected to the hydraulic circuit 10 via a line 38 which opens into the pressure limiting valve 15 and contains a shut-off valve 40 which is closed during normal driving operation. The line 34 and the section of the line 38 located after the shut-off valve 40 are connected to one another by a line 45 having a safety valve 46 which opens in the direction of the fluid container 11 associated with the hydraulic circuit 10.

Beim Einfedern des Sitzträgers 1 bewegt sich der Kolben 3 entgegen der Kraft des hydropneumatischen Federelements 20 nach unten und von dem Hydraulikkreis 10 strömt Hydraulikflüssigkeit unter Druck durch die zweite Leitung 8 über das in Richtung des zweiten Zylinderraums 5 öffnende Rückschlagventil 25 in den zweiten Zylinderraum 5.When the seat support 1 is compressed, the piston 3 moves against the force of the hydropneumatic Spring element 20 downwards and from the hydraulic circuit 10 hydraulic fluid flows through under pressure the second line 8 via the check valve 25 opening in the direction of the second cylinder chamber 5 into the second cylinder space 5.

Beim anschließenden Ausfedern des Sitzträgers 1 wird der Kolben 3 nach oben bewegt und verdrängt hierdurch Hydraulikflüssigkeit aus dem zweiten Zylinderraum 5 in Richtung des Hydraulikkreises 10. DieseDuring the subsequent rebound of the seat support 1, the piston 3 is moved upwards and displaced as a result, hydraulic fluid from the second cylinder chamber 5 in the direction of the hydraulic circuit 10. This

so muß nunmehr über das einstellbare Plattenventil 27 strömen. Das Ausfedern des Sitzträgers 1 erfolgt somit gedämpft, wobei die Größe der Dämpfung durch entsprechendes Einstellen des Plattenventils 27 änderbar ist.so must now flow through the adjustable plate valve 27. The seat support 1 is thus rebounded damped, whereby the amount of damping can be changed by adjusting the plate valve 27 accordingly is.

Zum Erhöhen der Federhärte des hydropneumatischen Federelements 20 muß das normalerweise offene Absperrventil 36 geschlossen werden. Die von dem Hydraulikkreis 10 gelieferte Hydraulikflüssigkeit fließt hierdurch über die Leitung 34 und das in dieser Durchflußrichtung öffnende Rückschlagventil 35 in den zweiten Zylinderraum 33 des Stellzylinders 30, dessen Schwimmkolben 31 somit in der Richtung des Pfeiles 42 verschoben wird, wodurch aufgrund der dem hydropneumatischen Federelement 20 nunmehr zugeführten Hydraulikflüssigkeit die Vorspannung des Gaspolsters 23 erhöht wird. Bleibt hierbei das Absperrventil 36 zu lange geschlossen und tritt hierdurch in dem Stellzylinder 36 ein Überdruck auf, so öffnet das in der Leitung 45To increase the spring stiffness of the hydropneumatic spring element 20, the normally open Shut-off valve 36 are closed. The hydraulic fluid supplied from the hydraulic circuit 10 flows as a result, via the line 34 and the check valve 35 which opens in this flow direction into the second cylinder space 33 of the actuating cylinder 30, the floating piston 31 of which is thus in the direction of the arrow 42 is shifted, as a result of which the hydropneumatic spring element 20 is now supplied Hydraulic fluid, the bias of the gas cushion 23 is increased. In this case, the shut-off valve 36 remains closed If it is closed for a long time and this results in an overpressure in the actuating cylinder 36, this opens in the line 45

angeordnete Sicherheitsventil 46.arranged safety valve 46.

Soll dagegen die Federhärte verringert werden, so muß das normalerweise geschlossene Absperrventil 40 in der Leitung 38 so lange geöffnet werden, bis die gewünschte Einstellung erreicht ist.If, on the other hand, the spring stiffness is to be reduced, the normally closed shut-off valve 40 be opened in line 38 until the desired setting is reached.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (1)

Patentanspruch:Claim: Abfederung für Fahrzeugsitze, insbesondere für Sitze von Schleppern od. dgl., bei der der Sitzträger dem einen Teil einer hydraulischen Kolben-Zylinder-Einheit zugeordnet ist, deren erster Zylinderraum über eine erste Leitung mit einem hydropneumatischen Federelement verbunden ist, dessen Federhärte durch Verändern seines Hydraulikraumes einstellbar ist, und deren zweiter Zylinderraum über eine zweite, eine in Abhängigkeit von der Durchflußrichtung wirksam werdende Drosselanordnung enthaltende Leitung an den Hydraulikkreis des Fahrzeugs angeschlossen ist, dadurch gekennzeichnet, daß die zweite Leitung (8) mit dem Hydraulikkreis (10) zwischen einem Absperrventil (36) und einem diesem nachgeschalteten Druckbegrenzungsventil (15) verbunden ist und ein einen Schwimmkolben (31) aufweisender, mit seinem ersten Zylinderraum (32) an den Hydraulikraum (22) des hydropneumatischen Federelementes angeschlossener Stellzylinder (30) vorgesehen ist, dessen zweiter Zylinderraum (33) mit dem Hydraulikkreis (10) einerseits über eine ein in Richtung auf den zweiten Zylinderraum (33) hin öffnendes Rückschlagventil (35) enthaltende, vor dem Absperrventil (36) von diesem abzweigende Leitung (34) und andererseits über eine ein weiteres Absperrventil (40) aufweisende, nach dem Druckbegrenzungsventil (15) in diesen mündende Leitung (38) verbunden ist.Suspension for vehicle seats, in particular for tractor seats or the like, in which the seat support to which one part of a hydraulic piston-cylinder unit is assigned, the first cylinder space of which is connected via a first line to a hydropneumatic spring element, whose Spring stiffness is adjustable by changing its hydraulic space, and the second cylinder space via a second throttle arrangement that becomes effective depending on the direction of flow containing line is connected to the hydraulic circuit of the vehicle, characterized in that that the second line (8) with the hydraulic circuit (10) between a shut-off valve (36) and a pressure relief valve (15) connected downstream of this and a a floating piston (31) having, with its first cylinder chamber (32) to the hydraulic chamber (22) of the hydropneumatic spring element connected adjusting cylinder (30) is provided, whose second cylinder chamber (33) with the hydraulic circuit (10) on the one hand via a one in the direction of the second cylinder chamber (33) containing the check valve (35) opening upstream of the shut-off valve (36) from this branching line (34) and on the other hand via a further shut-off valve (40) having, after the pressure relief valve (15) in this opening line (38) is connected.
DE1480465A 1964-05-14 1965-04-15 Suspension for vehicle seats Expired DE1480465C3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR74000898 1964-05-14
DEV0031388 1966-06-29

Publications (3)

Publication Number Publication Date
DE1480465A1 DE1480465A1 (en) 1970-01-08
DE1480465B2 DE1480465B2 (en) 1978-02-09
DE1480465C3 true DE1480465C3 (en) 1978-10-05

Family

ID=33419754

Family Applications (2)

Application Number Title Priority Date Filing Date
DE1480465A Expired DE1480465C3 (en) 1964-05-14 1965-04-15 Suspension for vehicle seats
DE1655548A Expired DE1655548C3 (en) 1964-05-14 1966-06-29 Hydropneumatic suspension for seats on tractors equipped with a hydraulic lifting device

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE1655548A Expired DE1655548C3 (en) 1964-05-14 1966-06-29 Hydropneumatic suspension for seats on tractors equipped with a hydraulic lifting device

Country Status (1)

Country Link
DE (2) DE1480465C3 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8800977B2 (en) 2010-12-15 2014-08-12 Grammer Ag Suspension device for vehicle seats and/or vehicle cabins having an elastomer member
US8926012B2 (en) 2010-08-31 2015-01-06 Grammer Ag Vehicle seats for vehicles
US8960802B2 (en) 2010-11-29 2015-02-24 Grammer Ag Vehicle seat with guided scissor arms
US8973967B2 (en) 2011-09-15 2015-03-10 Grammer Ag Vehicle seat, motor vehicle and method for spring-mounting a vehicle seat
US9266452B2 (en) 2010-12-08 2016-02-23 Grammer Ag Vehicle vibration device for vehicle seats or vehicle cabs
US9376042B2 (en) 2010-08-04 2016-06-28 Grammer Ag Horizontal springing device for vehicle seats with elastomer spring element with progressive spring characteristic curve

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022411A (en) * 1975-06-27 1977-05-10 Royal Industries, Inc. Self-levelling seat suspension system for vehicles
FR2360440B1 (en) * 1975-11-14 1978-12-29 Inst Nat Rech Securite SEAT FOR VEHICLE INTENDED TO MOVE IN ACCIDENTAL GROUND
DE2805842A1 (en) * 1978-02-11 1979-08-16 Herbert Dr Ing Schnauber VEHICLE SEAT WITH DEVICE FOR ADAPTATION TO DIFFERENT BODY WEIGHTS
FR2424147A2 (en) * 1978-04-26 1979-11-23 Sifra Suspended seat for wheeled or tracked vehicle - has vertical oscillations damped by hydraulic and pneumatic chambers, with fluid transfer controlled by lever-operated distributor
DE2948215A1 (en) * 1979-11-30 1981-06-04 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart HYDROPNEUMATIC CUSHIONED SEAT FOR VEHICLES, IN PARTICULAR MOTOR VEHICLES
FR2655924B1 (en) * 1989-12-19 1992-03-13 Molinier Andre OSCILLATING SEAT SUPPORT DEVICE WITH HYDROPNEUMATIC SUSPENSION FOR AN ALL TERRAIN VEHICLE.
DE4321152A1 (en) * 1993-06-25 1995-01-05 Kloeckner Humboldt Deutz Ag Suspension for the cab of an agricultural vehicle
DE102010026568B4 (en) 2010-07-08 2016-09-22 Grammer Aktiengesellschaft Seat suspension device for a vehicle seat
DE102010033028B4 (en) 2010-08-02 2014-02-27 Grammer Aktiengesellschaft Vehicle vibration device with a horizontal suspension device
DE102010055342B4 (en) * 2010-12-21 2015-03-26 Grammer Aktiengesellschaft Horizontal seat spring device
DE102014107816B4 (en) 2014-06-03 2018-05-03 Grammer Aktiengesellschaft Commercial vehicle seat with lockable cross-slide part
DE102014109191B8 (en) * 2014-07-01 2018-12-20 Grammer Aktiengesellschaft Suspension system for vehicle seats and method for springing vehicle seat parts
DE102015113176B4 (en) 2015-08-10 2021-12-30 Grammer Aktiengesellschaft Horizontal vibration device for a vehicle seat
CN114771376B (en) * 2022-06-22 2022-10-04 扬州市高升机械有限公司 Intelligent high-comfort engineering machinery seat

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9376042B2 (en) 2010-08-04 2016-06-28 Grammer Ag Horizontal springing device for vehicle seats with elastomer spring element with progressive spring characteristic curve
US8926012B2 (en) 2010-08-31 2015-01-06 Grammer Ag Vehicle seats for vehicles
US8960802B2 (en) 2010-11-29 2015-02-24 Grammer Ag Vehicle seat with guided scissor arms
US9266452B2 (en) 2010-12-08 2016-02-23 Grammer Ag Vehicle vibration device for vehicle seats or vehicle cabs
US8800977B2 (en) 2010-12-15 2014-08-12 Grammer Ag Suspension device for vehicle seats and/or vehicle cabins having an elastomer member
US8973967B2 (en) 2011-09-15 2015-03-10 Grammer Ag Vehicle seat, motor vehicle and method for spring-mounting a vehicle seat

Also Published As

Publication number Publication date
DE1480465B2 (en) 1978-02-09
DE1480465A1 (en) 1970-01-08
DE1655548A1 (en) 1970-07-16
DE1655548B2 (en) 1975-05-15
DE1655548C3 (en) 1976-01-02

Similar Documents

Publication Publication Date Title
DE1480465C3 (en) Suspension for vehicle seats
DE3532293C2 (en) Vibration damper with adjustable damping force
DE69005747T2 (en) Hydraulic fluid valve and a damper equipped with such a valve.
DE3323363C2 (en)
DE19504364C2 (en) Pressure control valve
DE3313613A1 (en) DAMPING FORCE GENERATING DEVICE FOR AN OIL DAMPER
DE3532292A1 (en) Vibration damper having an adjustable damping force
CH630449A5 (en) SHOCK ABSORBER ARRANGEMENT.
DE102017111157B3 (en) Adjustable vibration damper
DE1936858C3 (en) Self-pumping hydraulic strut with internal level control for vehicles
DE7346104U (en) Shock absorbers
DE1281865B (en) Infinitely adjustable shock absorber, especially for motor vehicles
DE1225450B (en) Hydraulic twin pipe damper
CH668814A5 (en) PRE-CONTROLLED PRESSURE LIMIT VALVE.
EP0222858B2 (en) Pipe cut-off device
DE1800020A1 (en) From the outside lockable, hydropneumatic piston-cylinder arrangement
DE69418171T2 (en) Valve
DE69029904T2 (en) HYDRAULIC CIRCUIT ARRANGEMENT
DE2322997C2 (en) Damping device for hydropneumatic vehicle springs
DE3111410A1 (en) Spring element with a device for adjusting the damping force of a motor vehicle shock absorber acting in concert with this
DE3401369A1 (en) Pilot-controlled pressure-relief valve
DE3715651A1 (en) Double-acting stop valve
DE112019003735T5 (en) Shock absorbers
DE4117098A1 (en) Master cylinder for ABS brackets
DE2905178C2 (en) Brake valve for the controlled relief of a high pressure chamber

Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
EHJ Ceased/non-payment of the annual fee