DE102005010098A1 - Unsealable non-return valve has spring-loaded ball which closes and pin which can be moved transversely to direction of flow through valve to partially or wholly open it when pressure on it is not sufficient to open it normally - Google Patents
Unsealable non-return valve has spring-loaded ball which closes and pin which can be moved transversely to direction of flow through valve to partially or wholly open it when pressure on it is not sufficient to open it normally Download PDFInfo
- Publication number
- DE102005010098A1 DE102005010098A1 DE102005010098A DE102005010098A DE102005010098A1 DE 102005010098 A1 DE102005010098 A1 DE 102005010098A1 DE 102005010098 A DE102005010098 A DE 102005010098A DE 102005010098 A DE102005010098 A DE 102005010098A DE 102005010098 A1 DE102005010098 A1 DE 102005010098A1
- Authority
- DE
- Germany
- Prior art keywords
- check valve
- sealing body
- inlet opening
- valve seat
- entsperrorgan
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/027—Mechanical springs regulated by fluid means
- B60G17/0272—Mechanical springs regulated by fluid means the mechanical spring being a coil spring
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
- F16K15/1823—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for ball check valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/12—Wound spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/30—Spring/Damper and/or actuator Units
- B60G2202/32—The spring being in series with the damper and/or actuator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/40—Type of actuator
- B60G2202/41—Fluid actuator
- B60G2202/413—Hydraulic actuator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/40—Type of actuator
- B60G2202/41—Fluid actuator
- B60G2202/415—Fluid actuator using other types of valves, e.g. mechanically operated valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/10—Mounting of suspension elements
- B60G2204/12—Mounting of springs or dampers
- B60G2204/124—Mounting of coil springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/30—Height or ground clearance
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
Ein entsperrbares Rückschlagventil (21) umfasst einen Ventilsitz (24) an einer Einlassöffnung (25), einen bewegbaren Dichtkörper (23), der in einer Schließstellung gegen den Ventilsitz (24) gedrückt ist und dabei die Einlassöffnung (25) verschließt, sowie ein Entsperrorgan (27), das in der Schließstellung quer zur Strömungsrichtung eines Arbeitsmediums an der Einlassöffnung (25) zwischen den Dichtkörper (23) und den Ventilsitz (24) einrückbar ist, wobei die Einlassöffnung (25) zumindest teilweise freigegeben wird. Das erfindungsgemäße Rückschlagventil zeichnet sich durch eine kompakte Bauweise und einen geringen Stellenenergiebedarf aus. Es eignet sich daher besonders zum Einbau in eine Vorrichtung zur Niveauregulierung an einem Kraftfahrzeug, bei der eine hydraulische Pumpe und das nachgeschaltete entsperrbare Rückschlagventil im Kolben einer Zylinder-Kolben-Einheit angeordnet sind.One unlockable check valve (21) comprises a valve seat (24) at an inlet opening (25), a movable sealing body (23), in a closed position pressed against the valve seat (24) is while the inlet opening (25) closes, and a Entsperrorgan (27), in the closed position transverse to the flow direction a working medium at the inlet opening (25) between the sealing bodies (23) and the valve seat (24) engageable is, with the inlet opening (25) is at least partially released. The check valve according to the invention is characterized by a compact design and low placement energy requirements out. It is therefore particularly suitable for installation in a device for level control on a motor vehicle, in which a hydraulic Pump and the downstream pilot operated check valve in the piston Cylinder-piston unit are arranged.
Description
Die Erfindung bezieht auf ein entsperrbares Rückschlagventil. Weiterhin bezieht sich die Erfindung auf eine Vorrichtung zur Niveauregulierung an einem Kraftfahrzeug, bei der ein entsperrbares Rückschlagventil zum Einsatz kommt.The The invention relates to a pilot operated check valve. Further relates the invention relates to a device for level control on a Motor vehicle in which a pilot-operated check valve is used comes.
Entsperrbare
Rückschlagventile
sind aus dem Stand der Technik allgemein bekannt. Beispiele hierfür finden
sich unter anderem in der
Um ein solches Ventil zu entsperren, muss an dem Dichtkörper eine Kraft aufgebracht werden, die größer ist, als die Summe der aus der Feder und einer etwaigen Druckdifferenz resultierenden Schließkräfte. Wird der Dichtkörper mit einem Magnetanker gekoppelt, der in eine Magnetspule eintaucht, so könnte durch ein Aktivieren bzw. Bestromen der Magnetspule auf den Magnetanker und damit auf den Dichtkörper eine Kraft aufgebracht werden, die letztlich die Schließwirkung aufhebt. Zwar kann die benötigte Kraft durch strömungstechnische Maßnahmen am Dichtkörper verringert werden. Zum Überwinden der Schließstellung sind jedoch zunächst verhältnismäßig hohe Kräfte erforderlich, die eine entsprechend große Dimensionierung der Magnetspule und des Magnetankers bedingen.Around to unlock such a valve, must on the sealing body a Force to be applied, which is greater as the sum of the spring and any pressure difference resulting closing forces. Becomes the sealing body coupled with a magnet armature which dips into a magnetic coil, so could by activating or energizing the magnet coil on the magnet armature and thus on the sealing body a force will be applied, which will ultimately be the closing action picks. Although the needed Power through fluidic measures on the sealing body be reduced. To overcome the closed position however, are first relatively high personnel required, the correspondingly large dimensions of the solenoid and the magnet armature condition.
Die
Kraft zum Entsperren des Rückschlagventils
lässt sich
durch Einsatz eines Vorsteuerelements verringern.
Die Erfindung zielt darauf ab, ein entsperrbares Rückschlagventil zu schaffen, das sowohl einen geringen Energiebedarf zum Entsperren als auch eine besonders kompakte Bauweise aufweist.The Invention aims to provide a pilot operated check valve, that both a low energy requirement for unlocking as well as a has a particularly compact design.
Insbesondere erfolgt die Erfindung mit Blick auf den Einsatz eines solchen Ventils in einer Zylinder-Kolben-Einheit, die im Verbund mit einer Feder zur Niveauregulierung in einem Kraftfahrzeug eingesetzt wird. Bei einer solchen wird angestrebt, ein eingestelltes Fahrzeugniveau möglichst ohne weitere Energiezufuhr aufrechtzuerhalten. Da sämtliche Komponenten der Zylinder-Kolben-Einheit einschließlich einer hydraulischen Pumpe und einem dieser nachgeschalteten Rückschlagventil innerhalb der Feder aufgenommen werden sollen, wird angestrebt, das Rückschlagventil besonders kompakt auszuführen.Especially the invention takes place with a view to the use of such a valve in a cylinder-piston unit, which in conjunction with a spring for Level control is used in a motor vehicle. At a such is sought, a set vehicle level as possible maintain without further energy input. Because all components the cylinder-piston unit including a hydraulic pump and one of these downstream check valve within the Spring to be absorbed, the aim is the check valve especially compact.
Erfindungsgemäß wird diese Aufgabe durch ein entsperrbares Rückschlagventil gemäß Patentanspruch 1 gelöst, das die folgenden Komponenten umfasst, nämlich einen Ventilsitz an einer Einlassöffnung, einen bewegbaren Dichtkörper, der in einer Schließstellung gegen den Ventilsitz gedrückt ist und dabei die Einlassöffnung verschließt, sowie ein Entsperrorgan, das in der Schließstellung quer zur Strömungsrichtung eines Arbeitsmediums an der Einlassöffnung zwischen den Dichtkörper und den Ventilsitz einrückbar ist, wobei die Einlassöffnung zumindest teilweise freigegeben wird.According to the invention this Task by a pilot-operated check valve according to claim 1 solved, comprising the following components, namely a valve seat on one Inlet port, a movable sealing body, in a closed position pressed against the valve seat is while the inlet opening closes, and a Entsperrorgan, in the closed position transverse to the flow direction a working medium at the inlet opening between the sealing body and the valve seat einrückbar is, with the inlet opening is at least partially released.
Durch die Entsperrung des Dichtkörpers quer zur Strömungsrichtung des Arbeitsmediums ergeben sich zum einen besonders geringe Stellkräfte und damit ein geringer Energiebedarf. Zudem kann das Entsperrorgan besonders platzsparend ausgeführt werden.By the unblocking of the sealing body across to the flow direction the working medium arise on the one hand particularly low actuating forces and thus a low energy requirement. In addition, the unlocking can be special save space become.
Weitere, vorteilhafte Ausgestaltungen der Erfindung sind in den Patentansprüchen angegeben.Further, advantageous embodiments of the invention are specified in the claims.
Insbesondere ermöglicht das erfindungsgemäße Rückschlagventil eine Vorrichtung zur Niveauregulierung an einem Kraftfahrzeug mit einer Schraubenfeder, einer zwischen der Schraubenfeder und dem Fahrzeugaufbau eingegliederten Zylinder-Kolben-Einheit, die in die Schraubenfeder eingesetzt ist, und einer hydraulischen Pumpe mit einem nachgeschalteten entsperrbaren Rückschlagventil der vorstehenden Art. Dabei sind sowohl die Pumpe als auch das Rückschlagventil im Kolben der Zylinder-Kolben-Einheit angeordnet.Especially allows the check valve according to the invention a device for level control on a motor vehicle with a coil spring, one between the coil spring and the Vehicle body incorporated cylinder-piston unit, which in the Coil spring is inserted, and a hydraulic pump with a downstream pilot operated check valve of the above Art. Both the pump and the check valve in the piston are the Cylinder-piston unit arranged.
Vorzugsweise bildet das Rückschlagventil mit der hydraulischen Pumpe eine Baueinheit. Insbesondere ist es weiterhin möglich, das Rückschlagventil im Gehäuse der hydraulischen Pumpe anzuordnen.Preferably, the check valve with the hydraulic pump forms a structural unit. In particular, it is still possible to apply the check valve in the housing of the hydraulic pump organize.
Nachfolgend wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Die Zeichnung zeigt in:following the invention with reference to an embodiment shown in the drawing explained in more detail. The Drawing shows in:
Die
Die
Zylinder-Kolben-Einheit
In
der Zylinder-Kolben-Einheit
Der
hydraulischen Pumpe
Um
den Kolben
Aufgrund
der beengten Raumverhältnisse
innerhalb des Zylinders
Das
erfindungsgemäße Rückschlagventil
Die
Einlassöffnung
Weiterhin
ist eine Feder
Zur
Entlastung des Druckraums
Das
Entsperrorgan
Um
die beim Entsperren aufzubringenden Kräfte gering zu halten, kann
das Entsperrorgan
Beim
Eingriff des Entsperrorgans
Die Erfindung wurde vorstehend anhand eines Ausführungsbeispiels näher erläutert. Sie ist jedoch nicht auf dieses Ausführungsbeispiel beschränkt, sondern umfasst alle durch die Patentansprüche definierten Ausgestaltungen.The The invention has been explained above with reference to an embodiment. she but is not on this embodiment limited, but comprises all embodiments defined by the claims.
- 11
- Dichtkörpersealing body
- 22
- Ventilsitzvalve seat
- 33
- Einlassöffnunginlet port
- 44
- Vorsteuerelementpilot element
- 55
- Federfeather
- 66
- Vorsteueröffnungpilot hole
- 77
- Magnetbodenmagnetic ground
- 88th
- Magnetankerarmature
- 1111
- Schraubenfedercoil spring
- 1212
- Zylinder-Kolben-EinheitCylinder-piston unit
- 1313
- Zylindercylinder
- 1414
- Federtellerspring plate
- 1515
- Deckelcover
- 1616
- Kolbenpiston
- 1717
- hydraulische Pumpehydraulic pump
- 1818
- Motorengine
- 1919
- Vorratsraumpantry
- 2020
- Druckkammerpressure chamber
- 2121
- entsperrbares Rückschlagventilreleasable check valve
- 2222
-
Gehäuse der
Pumpe
17 Housing of the pump17 - 2323
- Dichtkörper (Kugel)Sealing body (ball)
- 2424
- Ventilsitzvalve seat
- 2525
- Einlassöffnunginlet port
- 2626
- Federfeather
- 2727
- EntsperrorganEntsperrorgan
- 2828
- Stellantriebactuator
- 2929
- Keilflächewedge surface
Claims (14)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005010098A DE102005010098A1 (en) | 2005-03-04 | 2005-03-04 | Unsealable non-return valve has spring-loaded ball which closes and pin which can be moved transversely to direction of flow through valve to partially or wholly open it when pressure on it is not sufficient to open it normally |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005010098A DE102005010098A1 (en) | 2005-03-04 | 2005-03-04 | Unsealable non-return valve has spring-loaded ball which closes and pin which can be moved transversely to direction of flow through valve to partially or wholly open it when pressure on it is not sufficient to open it normally |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102005010098A1 true DE102005010098A1 (en) | 2006-09-07 |
Family
ID=36848159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102005010098A Withdrawn DE102005010098A1 (en) | 2005-03-04 | 2005-03-04 | Unsealable non-return valve has spring-loaded ball which closes and pin which can be moved transversely to direction of flow through valve to partially or wholly open it when pressure on it is not sufficient to open it normally |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102005010098A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2933141A1 (en) * | 2008-06-27 | 2010-01-01 | Vianney Rabhi | SCREW BALL LIFTING DEVICE FOR VARIABLE COMPRESSION RATE MOTOR. |
| FR2933140A1 (en) * | 2008-06-26 | 2010-01-01 | Vianney Rabhi | DEVICE FOR ADJUSTING THE COMPRESSION RATE AT THE BALLAST RISE FOR A VARIABLE COMPRESSION RATE MOTOR. |
| WO2010000985A3 (en) * | 2008-07-03 | 2010-04-22 | Vianney Rabhi | Electro-hydraulic valve with lifting ball for variable compression ratio engine hydraulic unit |
| WO2017081090A1 (en) * | 2015-11-13 | 2017-05-18 | Hoerbiger Automotive Komfortsysteme Gmbh | Motor vehicle chassis |
| WO2017081083A1 (en) * | 2015-11-13 | 2017-05-18 | Hoerbiger Automotive Komfortsysteme Gmbh | Motor vehicle chassis |
| WO2017140441A1 (en) * | 2016-02-16 | 2017-08-24 | Zf Friedrichshafen Ag | Adjustable spring bracket |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1995475A (en) * | 1928-10-23 | 1935-03-26 | Ludwig F C Haas | Valve |
| DE2843152A1 (en) * | 1978-09-05 | 1980-03-13 | Peter Ing Grad Ginzler | DEVICE FOR LOCKING OR RELEASE OF THE FLOW OF A FLOWABLE MEDIUM |
| DE3917458A1 (en) * | 1989-05-30 | 1990-12-06 | Wabco Westinghouse Fahrzeug | LEVEL CONTROL DEVICE FOR VEHICLES |
| WO1998010207A1 (en) * | 1996-09-09 | 1998-03-12 | Lenko L. Nilsson | Positively controlled ball valve |
| DE3925222C2 (en) * | 1989-06-19 | 1998-11-05 | Mannesmann Vdo Ag | Valve or unblockable check valve, especially for a vane compressor, used in a central door locking system |
| DE19856018A1 (en) * | 1998-12-04 | 2000-06-08 | Mannesmann Rexroth Ag | Unlockable check valve for very high system pressures |
| DE20106511U1 (en) * | 2001-04-14 | 2001-08-02 | FESTO AG & Co., 73734 Esslingen | Valve unit with unlockable non-return valve and thus equipped fluid-operated drive |
-
2005
- 2005-03-04 DE DE102005010098A patent/DE102005010098A1/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1995475A (en) * | 1928-10-23 | 1935-03-26 | Ludwig F C Haas | Valve |
| DE2843152A1 (en) * | 1978-09-05 | 1980-03-13 | Peter Ing Grad Ginzler | DEVICE FOR LOCKING OR RELEASE OF THE FLOW OF A FLOWABLE MEDIUM |
| DE3917458A1 (en) * | 1989-05-30 | 1990-12-06 | Wabco Westinghouse Fahrzeug | LEVEL CONTROL DEVICE FOR VEHICLES |
| DE3925222C2 (en) * | 1989-06-19 | 1998-11-05 | Mannesmann Vdo Ag | Valve or unblockable check valve, especially for a vane compressor, used in a central door locking system |
| WO1998010207A1 (en) * | 1996-09-09 | 1998-03-12 | Lenko L. Nilsson | Positively controlled ball valve |
| DE19856018A1 (en) * | 1998-12-04 | 2000-06-08 | Mannesmann Rexroth Ag | Unlockable check valve for very high system pressures |
| DE20106511U1 (en) * | 2001-04-14 | 2001-08-02 | FESTO AG & Co., 73734 Esslingen | Valve unit with unlockable non-return valve and thus equipped fluid-operated drive |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011525956A (en) * | 2008-06-26 | 2011-09-29 | ラビー,ヴィアニー | Ball lift device for adjusting the compression ratio of a variable compression ratio engine |
| FR2933140A1 (en) * | 2008-06-26 | 2010-01-01 | Vianney Rabhi | DEVICE FOR ADJUSTING THE COMPRESSION RATE AT THE BALLAST RISE FOR A VARIABLE COMPRESSION RATE MOTOR. |
| CN102216589B (en) * | 2008-06-26 | 2014-05-14 | 维亚内·拉比 | Ball-lift device for adjusting the compression ratio of a variable compression ratio engine |
| WO2010004123A3 (en) * | 2008-06-26 | 2010-03-04 | Vianney Rabhi | Ball lift device for adjusting the compression ratio of a variable compression ratio engine |
| AU2009267910B2 (en) * | 2008-06-26 | 2013-08-22 | Vianney Rabhi | Ball lift device for adjusting the compression ratio of a variable compression ratio engine |
| US8291871B2 (en) | 2008-06-26 | 2012-10-23 | Vianney Rabhi | Ball-lift compression ratio adjustment device for a variable compression ratio engine |
| CN102216589A (en) * | 2008-06-26 | 2011-10-12 | 维亚内·拉比 | Ball lift device for adjusting the compression ratio of a variable compression ratio engine |
| US8439004B2 (en) | 2008-06-27 | 2013-05-14 | Vianney Rabhi | Ball-lift device with screw for a variable compression ratio engine |
| EP3517756A1 (en) * | 2008-06-27 | 2019-07-31 | Vianney Rabhi | Ball-screw lift device for variable compression-ratio engine |
| CN102132021A (en) * | 2008-06-27 | 2011-07-20 | 维亚内·拉比 | Screw type ball lifter for variable compression ratio engines |
| AU2009264043B2 (en) * | 2008-06-27 | 2013-03-28 | Vianney Rabhi | Ball-screw lift device for variable compression-ratio engine |
| FR2933141A1 (en) * | 2008-06-27 | 2010-01-01 | Vianney Rabhi | SCREW BALL LIFTING DEVICE FOR VARIABLE COMPRESSION RATE MOTOR. |
| WO2009156624A3 (en) * | 2008-06-27 | 2010-03-04 | Vianney Rabhi | Ball-screw lift device for variable compression-ratio engine |
| KR101539484B1 (en) * | 2008-06-27 | 2015-07-24 | 비아니 라비 | Ball-screw lift device for variable compression-ratio engine |
| JP2011525957A (en) * | 2008-06-27 | 2011-09-29 | ラビー,ヴィアニー | Ball screw lift device for variable compression ratio engine |
| EP2327911A1 (en) * | 2008-07-03 | 2011-06-01 | Vianney Rabhi | Electro-hydraulic valve with ball lifting for variable compression ratio engine hydraulic unit |
| WO2010000985A3 (en) * | 2008-07-03 | 2010-04-22 | Vianney Rabhi | Electro-hydraulic valve with lifting ball for variable compression ratio engine hydraulic unit |
| WO2017081090A1 (en) * | 2015-11-13 | 2017-05-18 | Hoerbiger Automotive Komfortsysteme Gmbh | Motor vehicle chassis |
| CN108473018A (en) * | 2015-11-13 | 2018-08-31 | 贺尔碧格汽车舒适系统有限责任公司 | Motor vehicle chassis |
| US10308090B2 (en) | 2015-11-13 | 2019-06-04 | Hoerbiger Automotive Komfortsysteme Gmbh | Motor vehicle chassis |
| WO2017081083A1 (en) * | 2015-11-13 | 2017-05-18 | Hoerbiger Automotive Komfortsysteme Gmbh | Motor vehicle chassis |
| US10369859B2 (en) | 2015-11-13 | 2019-08-06 | Hoerbiger Automotive Komfortsysteme Gmbh | Motor vehicle chassis |
| CN108473018B (en) * | 2015-11-13 | 2021-07-27 | 贺尔碧格汽车舒适系统有限责任公司 | motor vehicle chassis |
| WO2017140441A1 (en) * | 2016-02-16 | 2017-08-24 | Zf Friedrichshafen Ag | Adjustable spring bracket |
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Legal Events
| Date | Code | Title | Description |
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