US20010015127A1 - Arrangement for hydraulic actuation of a movable component on vehicles - Google Patents
Arrangement for hydraulic actuation of a movable component on vehicles Download PDFInfo
- Publication number
- US20010015127A1 US20010015127A1 US09/785,566 US78556601A US2001015127A1 US 20010015127 A1 US20010015127 A1 US 20010015127A1 US 78556601 A US78556601 A US 78556601A US 2001015127 A1 US2001015127 A1 US 2001015127A1
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- US
- United States
- Prior art keywords
- pressure
- valve
- check valve
- line
- arrangement
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J7/00—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs
- B60J7/08—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of non-sliding type, i.e. movable or removable roofs or panels, e.g. let-down tops or roofs capable of being easily detached or of assuming a collapsed or inoperative position
- B60J7/12—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of non-sliding type, i.e. movable or removable roofs or panels, e.g. let-down tops or roofs capable of being easily detached or of assuming a collapsed or inoperative position foldable; Tensioning mechanisms therefor, e.g. struts
- B60J7/1226—Soft tops for convertible vehicles
- B60J7/1265—Soft tops for convertible vehicles characterised by kinematic movements, e.g. using parallelogram linkages
- B60J7/1269—Soft tops for convertible vehicles characterised by kinematic movements, e.g. using parallelogram linkages with remote power control
- B60J7/1273—Soft tops for convertible vehicles characterised by kinematic movements, e.g. using parallelogram linkages with remote power control using hydraulic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/10—Special arrangements for operating the actuated device with or without using fluid pressure, e.g. for emergency use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/004—Fluid pressure supply failure
Definitions
- the invention relates to an arrangement for hydraulic actuation of a movable component on vehicles, particularly a vehicle top, trunk lid, a cover or the like, having at least one double-action working cylinder which working chambers are connected to a pressure source via a pressure line or which working chambers are at least temporarily connectable thereto through a switching valve.
- a throttle is provided behind the shut-off element in the pressure relief line. A slower pressure drop is thereby guaranteed within the system, which prevents excessively rapid and uncontrolled movements after pressure failure in the pressure line.
- shut-off element is a hydraulically switchable valve as in an additional characteristic of the invention
- additional control systems for the shut-off element may be eliminated, which have higher requirements in terms of construction and control technology, and a fault-free simple shut-off element is provided having a direct and immediate controlling effect through the pressure in the pressure line.
- the shut-off element is a hydraulically blocking check valve.
- the hydraulic counterforce may therefore be directly defined through adjustment of the blocking-force of the valve, which is the counterforce to the weight or closing force of the moving vehicle component during failure of the hydraulic system, and thus the emergency holding function is realized for said component.
- the design of a check valve opening away from the working cylinder that during the use of manual supplementary force onto the normally hydraulically moved component it is made possible to open the valve element of the check valve. This is based on the related pressure increase and discharge the working medium through the pressure relief line, which therefore makes manual emergency operation possible.
- valve element of the hydraulically blocking check valve may be blocked by a hydraulically actuated control piston having a larger surface than the one of the valve seat.
- This embodiment makes a secure locking position of the valve easier since a lower pressure than the operating pressure of the system is sufficient to shut the check valve based on these surface ratios.
- the control piston is designed as one piece together with the valve element. Structural and financial requirements are thereby reduced and a high operational dependability (of the check valve) is provided.
- control line for the hydraulically switchable valve originates at a location in front of the check valve of the pressure line.
- the blocking effect of the valve controlling the pressure relief is thereby immediately and directly dependent on the pressure in the pressure line, and additional control circuits or control devices may be eliminated thereby. Structural demands and space requirements are therefore especially low and operational dependability of the arrangement is considerably increased.
- the object of the invention is achieved in that the pressure relief line originates at a location if front of the switching valve and possibly in front of the check valve arrangement.
- FIG. 1 shows a schematic hydraulic circuit of an exemplary hydraulic arrangement according to the invention.
- FIG. 2 shows a schematic illustration of the functioning of a hydraulically blocking check valve used as a shut-off element.
- the arrangement for hydraulic actuation of a vehicle top, a cover, a trunk lid or any other movable vehicle component is provided with two double-action hydraulic cylinders 1 , for example, which are joined on one side to the vehicle and on the other side to a vehicle component, for instance the vehicle top or an interconnected lever arrangement.
- the working cylinders 1 are differentially driven whereby the piston-side working chambers and the rod-side working chambers of the working cylinder 1 are connected via lines 2 , 3 to a hydraulic unit 5 , which serves as a pressure source and which advantageously communicates with the electric circuit of the vehicle for the supply of energy.
- the hydraulic unit 5 includes a single-action pump 6 having a drive motor, a check valve arrangement 7 , a pressure relief valve 8 for adjustment of the maximum system pressure, and a tank 9 for the working medium—the hydraulic oil.
- a throttle 10 may also be installed in the hydraulic unit 5 just before the line exit.
- a control valve 11 having a check valve arrangement 12 is provided for the differential drive of the working cylinders 1 in line 2 leading to the piston-side working chamber.
- the control valve 11 alternately connects this working chamber with the pressure line 4 and a secondary line 13 , possibly via an inserted throttle, to the tank 9 while the rod-side working chamber of one or each working cylinder 1 continually remains in communication with the pressure line 4 .
- connections 15 may also be provided for additional hydraulic working units, such as additional working cylinders.
- a check valve 16 blocking in the direction of the hydraulic unit 5 , is inserted in the pressure line 4 that leads from the hydraulic unit 5 to the working cylinder 1 , preferably in front of the control valve 11 and/or the check valve arrangement 12 .
- the check valve 16 mainly maintains the operating pressure in the following system section in case of failure of the hydraulic unit 5 .
- a pressure relief line 17 branches off from the pressure line behind the check valve 16 and leads to the tank 9 .
- a shut-off valve 19 which is advantageously hydraulic and which may be switched via the control line 18 , is inserted in the pressure relief line 17 , and subsequently a throttle 20 may be inserted to prevent an excessively rapid pressure drop in the system.
- the shut-off valve 19 Since the control line 18 for the shut-off valve 19 originates at the location between the hydraulic unit 5 and the check valve 16 , an immediate controlling effect for the shut-off valve 19 is guaranteed, depending on the pressure supplied by the hydraulic unit 5 .
- the shut-off valve 19 is designed in itself in a manner whereby moving in the shut-off direction is achieved by means of a closing spring 21 , but which movement may be counteracted by a pressure increase in the system behind the check valve 16 through a second control line 22 or through functionally equivalent components or designs of the shut-off valve 19 itself.
- FIG. 2 there is shown in a schematic illustration, an advantageous embodiment of the shut-off valve 19 in the form of a hydraulically blocking check valve.
- a valve seat 23 is designed in the housing of the check valve 19 whereby the valve seat 23 may be closed by a valve element 24 .
- the valve element 24 has preferably a conical shape and the cross section of the seat 23 is smaller than the cross section of a control piston 25 , which is biased by pressure via the control line 18 that is in front of the check valve 16 .
- the valve element 14 and the control piston 25 are preferably designed as one piece having a circumferential groove to receive a seal 26 .
- the closing spring 21 also acts directly upon the valve element 24 via the control piston 25 to move the valve element 24 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Safety Valves (AREA)
Abstract
An arrangement for hydraulic actuation of a movable component on vehicles, particularly a vehicle top, trunk lid, a cover or the like, includes at least one double-action working cylinder (1) whose working chambers are connected to a pressure source (5) via a pressure line (4) or whose working chambers are at least temporarily connectable thereto through a switching valve (11). To make possible an automatic emergency operation of the normally hydraulic operated vehicle component in a simple and secure manner during failure of the pressure source, and in spite of the small available space and the mounting site with its difficult accessibility, a check valve (16) is inserted into the pressure line (4) blocking in the direction of the pressure source (5) and a pressure relief line (17) originates at a location between the check valve (16) and the switching valve arrangement for the working cylinder (1, 11) whereby a shut-off element (19) is inserted in the pressure relief line that opens when the pressure of the pressure source drops.
Description
- 1. Field of the Invention
- The invention relates to an arrangement for hydraulic actuation of a movable component on vehicles, particularly a vehicle top, trunk lid, a cover or the like, having at least one double-action working cylinder which working chambers are connected to a pressure source via a pressure line or which working chambers are at least temporarily connectable thereto through a switching valve.
- 2. The Prior Art
- Arrangements of this type are well known and make possible, for example, automatic actuation of vehicle doors, hoods, service access covers, covers for the trunk, the space for a convertible top or the convertible top itself. In case of shut-off or failure of the operating pressure (which means shut-off or failure of a (hydraulic) unit during automatic operation), the cover, the vehicle top or the like should remain hydraulically locked in a particular position to prevent uncontrolled retraction and dangers of injury related thereto.
- This is achieved in most systems through a so-called emergency hand-operated bolt, which blocks the connecting bore between the two working chambers of the hydraulic working cylinder, which in turn moves the component. Through this emergency hand-operated bolt it is guaranteed that during closing of the vehicle top, a pressure increase occurs at the piston-side, for example, and at the same time the rod-side remains without pressure (for systems in which the closing of the vehicle top is effected by the extension of the working cylinder.) The same is applicable in reversed order in a sense for the piston and the rod-side to open the vehicle top. In case of failure of the (hydraulic) unit, the emergency hand-operated bolt can be manually operated and the rod-side may be opened thereby. The system is therefore without pressure and the top or the cover or the like may be operated manually whereby the hydraulic medium is urged to the working chambers via the connecting bore.
- Should the mounting site of the hydraulic unit be in an unfavorable location, then the emergency hand-operated bolt may be operated only with great difficulties. In most cases, the hydraulic unit is mounted at the rear fender areas and therefore a flexible shaft must be provided to be able to operate the emergency hand-operated bolt from the trunk space. A version with an electrically actuated 2/2-directional seat valve would again be costly and susceptible to malfunctioning.
- It is the object of the present invention to improve on the known arrangement so that the described disadvantages are prevented, particularly in reference to the small available space and the mounting site with its difficult accessibility, and whereby particularly during failure of the pressure source there is made possible, in a simple and safe manner, manual emergency operation in any direction of the normally hydraulic operated vehicle component, such as the trunk lid, the cover, the vehicle top or the like.
- This object is achieved, according to the invention, in an arrangement of the above-mentioned type in that a check valve is inserted into the pressure line blocking in the direction of the pressure source whereby a pressure relief line originates at a location between the check valve and the switching valve arrangement for the working cylinder, and whereby a shut-off element is inserted in the pressure relief line that opens when the pressure of the pressure source drops. Through employment of the blocking check valve and the shut-off element, the emergency hand-operated bolt can be eliminated all together and an automatic, gradually engaging device is thereby provided for pressure relief in the system, which then allows manual emergency operation of the normally hydraulically operated vehicle component. In case of a functioning hydraulic system, which means at normal operating pressure, one or each working cylinder is supplied with working medium through the pressure line. In case of malfunctioning of the (hydraulic) unit, the pressure in the pressure line is reduced because of pressure loss in the pressure source. The operating pressure is at first maintained by the check valve. Only when the shut-off valve is opened, the working medium may escape through the pressure relief line and subsequently the pressure drops to such a degree that the working cylinder—and thereby also the movable vehicle component—can be manually operated. Depending on the pressure by which the shut-off element is opened, an emergency holding function can be realized, which means that a pressure may be maintained within the system which hydraulically compensates for the weight and/or closing force of the moving vehicle component such as a trunk lid or a cover. Only when a pressure increase occurs in addition to the blocking effect of the shut-off element during manual operation, then the working medium is discharged through the pressure relief line and the working cylinder may now be operated manually. A possible throttle in the pressure relief line prevents excessively rapid pressure drop in the system and prevents thereby uncontrolled movements of the moving vehicle component.
- According to an additional characteristic of the invention, a throttle is provided behind the shut-off element in the pressure relief line. A slower pressure drop is thereby guaranteed within the system, which prevents excessively rapid and uncontrolled movements after pressure failure in the pressure line.
- When the shut-off element is a hydraulically switchable valve as in an additional characteristic of the invention, additional control systems for the shut-off element may be eliminated, which have higher requirements in terms of construction and control technology, and a fault-free simple shut-off element is provided having a direct and immediate controlling effect through the pressure in the pressure line.
- It is advantageously proposed that the shut-off element is a hydraulically blocking check valve. The hydraulic counterforce may therefore be directly defined through adjustment of the blocking-force of the valve, which is the counterforce to the weight or closing force of the moving vehicle component during failure of the hydraulic system, and thus the emergency holding function is realized for said component. On the other hand, there is guaranteed by the design of a check valve opening away from the working cylinder, that during the use of manual supplementary force onto the normally hydraulically moved component it is made possible to open the valve element of the check valve. This is based on the related pressure increase and discharge the working medium through the pressure relief line, which therefore makes manual emergency operation possible.
- It is thereby advantageously proposed that the valve element of the hydraulically blocking check valve may be blocked by a hydraulically actuated control piston having a larger surface than the one of the valve seat. This embodiment makes a secure locking position of the valve easier since a lower pressure than the operating pressure of the system is sufficient to shut the check valve based on these surface ratios.
- Additionally, it is of advantage if in the described version of the shut-off element, which is functioning as a check valve, the control piston is designed as one piece together with the valve element. Structural and financial requirements are thereby reduced and a high operational dependability (of the check valve) is provided.
- According to another characteristic of the invention, the control line for the hydraulically switchable valve originates at a location in front of the check valve of the pressure line. The blocking effect of the valve controlling the pressure relief is thereby immediately and directly dependent on the pressure in the pressure line, and additional control circuits or control devices may be eliminated thereby. Structural demands and space requirements are therefore especially low and operational dependability of the arrangement is considerably increased.
- In an arrangement with at least one differentially controlled double-action working cylinder, which piston-side working chamber may be connected to a pressure source via a switching valve or possibly a check valve arrangement, the object of the invention is achieved in that the pressure relief line originates at a location if front of the switching valve and possibly in front of the check valve arrangement. Thereby there is no danger of negative influence on the drive of the working cylinder by the system component that is necessary for emergency operation, and there is also no distinct structural separation of the individual subordinate systems, which simplifies the installation and maintenance of the entire unit.
- The latter advantage does also exist if an arrangement with a pressure source is provided with at least one single-action pump, a tank for the working medium, and possibly auxiliary components such as a check valve arrangement and/or a pressure relief valve and/or a throttle, whereby the check valve is disposed in the pressure line behind the auxiliary components of the pressure source, and whereby the pressure relief line is connected to the tank so that no working medium can escape or can negatively impact the environment.
- The invention will be better understood by reference to accompanying drawings taken in conjunction with the following discussion.
- FIG. 1 shows a schematic hydraulic circuit of an exemplary hydraulic arrangement according to the invention.
- FIG. 2 shows a schematic illustration of the functioning of a hydraulically blocking check valve used as a shut-off element.
- The arrangement for hydraulic actuation of a vehicle top, a cover, a trunk lid or any other movable vehicle component (illustrated in FIG. 1), is provided with two double-action hydraulic cylinders1, for example, which are joined on one side to the vehicle and on the other side to a vehicle component, for instance the vehicle top or an interconnected lever arrangement. The working cylinders 1 are differentially driven whereby the piston-side working chambers and the rod-side working chambers of the working cylinder 1 are connected via
lines hydraulic unit 5, which serves as a pressure source and which advantageously communicates with the electric circuit of the vehicle for the supply of energy. - The
hydraulic unit 5 includes a single-action pump 6 having a drive motor, a check valve arrangement 7, apressure relief valve 8 for adjustment of the maximum system pressure, and atank 9 for the working medium—the hydraulic oil. Athrottle 10 may also be installed in thehydraulic unit 5 just before the line exit. - A
control valve 11 having acheck valve arrangement 12 is provided for the differential drive of the working cylinders 1 inline 2 leading to the piston-side working chamber. Thecontrol valve 11 alternately connects this working chamber with thepressure line 4 and asecondary line 13, possibly via an inserted throttle, to thetank 9 while the rod-side working chamber of one or each working cylinder 1 continually remains in communication with thepressure line 4. - Finally,
connections 15 may also be provided for additional hydraulic working units, such as additional working cylinders. - A
check valve 16, blocking in the direction of thehydraulic unit 5, is inserted in thepressure line 4 that leads from thehydraulic unit 5 to the working cylinder 1, preferably in front of thecontrol valve 11 and/or thecheck valve arrangement 12. Thecheck valve 16 mainly maintains the operating pressure in the following system section in case of failure of thehydraulic unit 5. Apressure relief line 17 branches off from the pressure line behind thecheck valve 16 and leads to thetank 9. A shut-offvalve 19, which is advantageously hydraulic and which may be switched via thecontrol line 18, is inserted in thepressure relief line 17, and subsequently athrottle 20 may be inserted to prevent an excessively rapid pressure drop in the system. Since thecontrol line 18 for the shut-offvalve 19 originates at the location between thehydraulic unit 5 and thecheck valve 16, an immediate controlling effect for the shut-offvalve 19 is guaranteed, depending on the pressure supplied by thehydraulic unit 5. The shut-offvalve 19 is designed in itself in a manner whereby moving in the shut-off direction is achieved by means of aclosing spring 21, but which movement may be counteracted by a pressure increase in the system behind thecheck valve 16 through asecond control line 22 or through functionally equivalent components or designs of the shut-offvalve 19 itself. - In FIG. 2 there is shown in a schematic illustration, an advantageous embodiment of the shut-off
valve 19 in the form of a hydraulically blocking check valve. Avalve seat 23 is designed in the housing of thecheck valve 19 whereby thevalve seat 23 may be closed by avalve element 24. Thevalve element 24 has preferably a conical shape and the cross section of theseat 23 is smaller than the cross section of acontrol piston 25, which is biased by pressure via thecontrol line 18 that is in front of thecheck valve 16. Thevalve element 14 and thecontrol piston 25 are preferably designed as one piece having a circumferential groove to receive aseal 26. Thereby, the closingspring 21 also acts directly upon thevalve element 24 via thecontrol piston 25 to move thevalve element 24. At normal operating pressure in thepressure line 4, secure closing of the shut-offvalve 19 is guaranteed based on the surface cross section of thecontrol piston 25 that is larger than the one of thevalve seat 23. During a pressure drop in front of thecheck valve 16, the pressure in thecontrol line 18 also drops to that value so that the opening pressure of the shut-offvalve 19 substantially depends now more on the force of theclosing spring 21. As long as this opening pressure is met or is exceeded in the pressure line section, which is arranged behind thecheck valve 16, thevalve element 14 is lifted from thevalve seat 23 against the force of theclosing spring 21 and the working medium can thus escape through thepressure relief line 17 into thetank 9 of thehydraulic system 5.
Claims (9)
1. An arrangement for hydraulic actuation of a movable component on vehicles, particularly a vehicle top, trunk lid, a cover or the like, comprising at least one double-action working cylinder (1) whose working chambers are connected to a pressure source (5) via a pressure line (4) or which working chambers are at least temporarily connectable thereto through a switching valve (11), characterized in that a check valve (16) is inserted into said pressure line (4) blocking in the direction of said pressure source (5) whereby a pressure relief line (17) originates at a location between said check valve (16) and the switching valve arrangement for the working cylinder (1, 11), and whereby a shut-off element (19) is inserted in said pressure relief line that opens when the pressure of the pressure source drops.
2. An arrangement according to , wherein a throttle (20) is provided in the pressure relief line (17) behind said shut-off element (19).
claim 1
3. An arrangement according to , wherein said shut-off element (19) is a hydraulically blocking valve.
claim 1
4. An arrangement according to , wherein said shut-off element (19) is a hydraulically switchable check valve.
claim 3
5. An arrangement according to , wherein the valve element (24) of the hydraulically blocking check valve (19) may block hydraulic medium via a hydraulic operated control piston (25) having a larger surface than the valve seat (23).
claim 4
6. An arrangement according to , wherein said control piston (25) is designed in one piece together with said valve element (24).
claim 5
7. An arrangement according to , wherein the control line (18) for the hydraulically switchable valve (19) originates at a location in front of said check valve (16) of said pressure line (4).
claim 6
8. An arrangement according to , including at least one differentially controlled double-action working cylinder (1) whose piston-side working chamber may be connected to a pressure source (5) via a switching valve (11) and possibly a check valve arrangement (12), wherein the pressure relief line (17) originates at a location in front of said switching valve (11) and possibly in front of said check valve arrangement (12).
claim 1
9. An arrangement according to , comprising a pressure source that is provided with at least one single-action pump (6), a tank (9) for the working medium and possibly auxiliary components such as a check valve arrangement (7) and/or a pressure relief valve (8) and/or a throttle (10), wherein said check valve (16) is disposed in the pressure line (4) behind all auxiliary components (6 through 10) of the pressure source (5), and wherein the pressure relief line (17) is connected to the tank (9).
claim 1
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT277/00 | 2000-02-22 | ||
AT0027700A AT408208B (en) | 2000-02-22 | 2000-02-22 | ARRANGEMENT FOR HYDRAULICALLY OPERATING A MOVING PART ON VEHICLES, IN PARTICULAR A COVER, A REAR COVER, A HATCH, OR THE LIKE. |
ATA277/2000 | 2000-02-22 |
Publications (2)
Publication Number | Publication Date |
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US20010015127A1 true US20010015127A1 (en) | 2001-08-23 |
US6446538B2 US6446538B2 (en) | 2002-09-10 |
Family
ID=3670657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/785,566 Expired - Fee Related US6446538B2 (en) | 2000-02-22 | 2001-02-20 | Arrangement for hydraulic actuation of a movable component on vehicles |
Country Status (4)
Country | Link |
---|---|
US (1) | US6446538B2 (en) |
JP (1) | JP2001263312A (en) |
AT (1) | AT408208B (en) |
DE (1) | DE10100652C5 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1311168C (en) * | 2001-12-31 | 2007-04-18 | 中国水利水电第四工程局 | Automatic opening and closing control method for hydraulic energy-accumulating gig unloading system |
WO2007076768A1 (en) * | 2005-12-09 | 2007-07-12 | Webasto Ag | Device and method for actuating an openable vehicle roof system |
CN103670116A (en) * | 2013-12-06 | 2014-03-26 | 镇江市高等专科学校 | Device for controlling hydraulic automobile trunk to be opened and closed automatically |
Families Citing this family (9)
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US7326023B2 (en) * | 2002-02-25 | 2008-02-05 | Hagenbuch Leroy G | Rear eject body for off-highway haulage units |
US20050105993A1 (en) * | 2003-02-25 | 2005-05-19 | Hagenbuch Leroy | Rear eject body for haulage units |
US20080298941A1 (en) * | 2003-02-25 | 2008-12-04 | Hagenbuch Leroy G | Charge Bucket Loading for Electric ARC Furnace Production |
DE102008059560B4 (en) | 2008-11-28 | 2014-11-20 | Rapa Rausch & Pausch Gmbh | Hydraulic system for operating a convertible top device |
US8711361B2 (en) * | 2009-11-05 | 2014-04-29 | Qualcomm, Incorporated | Methods and devices for detecting and measuring environmental conditions in high performance device packages |
DE102010038315B4 (en) | 2010-07-23 | 2015-09-24 | Rausch & Pausch Gmbh | Hydraulic system for moving a top part of a convertible top |
CN105133988B (en) * | 2015-07-31 | 2017-03-29 | 兖州煤业股份有限公司 | A kind of safety gate emergency operation device |
DE102017121499B3 (en) | 2017-09-15 | 2018-08-16 | Hoerbiger Automotive Komfortsysteme Gmbh | motor vehicle |
DE102017121501B3 (en) | 2017-09-15 | 2018-08-23 | Hoerbiger Automotive Komfortsysteme Gmbh | motor vehicle |
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GB1513171A (en) * | 1976-01-12 | 1978-06-07 | Hall Automation Ltd | Hydraulic control systems |
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DE2943642A1 (en) * | 1979-10-29 | 1981-05-07 | G.L. Rexroth Gmbh, 8770 Lohr | DEVICE FOR CONTROLLING A SIMPLY WORKING CYLINDER, IN PARTICULAR A PRESS WORKING CYLINDER |
DE3536219A1 (en) * | 1985-10-10 | 1987-04-16 | Heilmeier & Weinlein | HYDRAULIC CONTROL DEVICE |
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DE4106845A1 (en) * | 1991-03-04 | 1992-09-24 | Deere & Co | HYDRAULIC SYSTEM FOR CONTROLLING A POWER MOVING A CONSUMER |
AT396613B (en) * | 1992-05-15 | 1993-10-25 | Hoerbiger Fluidtechnik Gmbh | HYDRAULIC OPERATING ARRANGEMENT FOR A VEHICLE TAIL |
US5474138A (en) * | 1993-12-08 | 1995-12-12 | J & M Hydraulics, Inc. | Hydraulic control circuit for pile driver |
DE19641428C1 (en) * | 1996-10-08 | 1998-02-26 | Bayerische Motoren Werke Ag | Device for pivoting lid of car boot |
NL1011852C2 (en) * | 1999-04-21 | 2000-10-24 | Applied Power Inc | Hydraulic control device for a vehicle cover cap assembly. |
-
2000
- 2000-02-22 AT AT0027700A patent/AT408208B/en not_active IP Right Cessation
-
2001
- 2001-01-09 DE DE10100652A patent/DE10100652C5/en not_active Expired - Fee Related
- 2001-02-20 US US09/785,566 patent/US6446538B2/en not_active Expired - Fee Related
- 2001-02-21 JP JP2001045639A patent/JP2001263312A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1311168C (en) * | 2001-12-31 | 2007-04-18 | 中国水利水电第四工程局 | Automatic opening and closing control method for hydraulic energy-accumulating gig unloading system |
WO2007076768A1 (en) * | 2005-12-09 | 2007-07-12 | Webasto Ag | Device and method for actuating an openable vehicle roof system |
US20080315633A1 (en) * | 2005-12-09 | 2008-12-25 | Michael Antreich | Device and Method For Actuating an Openable Vehicle Roof System |
US7997636B2 (en) | 2005-12-09 | 2011-08-16 | Webasto Ag | Device and method for actuating an openable vehicle roof system |
CN103670116A (en) * | 2013-12-06 | 2014-03-26 | 镇江市高等专科学校 | Device for controlling hydraulic automobile trunk to be opened and closed automatically |
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Publication number | Publication date |
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ATA2772000A (en) | 2001-02-15 |
AT408208B (en) | 2001-09-25 |
US6446538B2 (en) | 2002-09-10 |
JP2001263312A (en) | 2001-09-26 |
DE10100652A1 (en) | 2001-08-23 |
DE10100652C5 (en) | 2010-04-15 |
DE10100652B4 (en) | 2005-05-25 |
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