EP1726761A1 - Dispositif lève-vitre pneumatique - Google Patents

Dispositif lève-vitre pneumatique Download PDF

Info

Publication number
EP1726761A1
EP1726761A1 EP05381024A EP05381024A EP1726761A1 EP 1726761 A1 EP1726761 A1 EP 1726761A1 EP 05381024 A EP05381024 A EP 05381024A EP 05381024 A EP05381024 A EP 05381024A EP 1726761 A1 EP1726761 A1 EP 1726761A1
Authority
EP
European Patent Office
Prior art keywords
window
pneumatic
lift according
window lift
valve
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Withdrawn
Application number
EP05381024A
Other languages
German (de)
English (en)
Inventor
José Emilio España Corral
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.)
Grupo Antolin Ingenieria SA
Original Assignee
Grupo Antolin Ingenieria SA
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 Grupo Antolin Ingenieria SA filed Critical Grupo Antolin Ingenieria SA
Priority to EP05381024A priority Critical patent/EP1726761A1/fr
Publication of EP1726761A1 publication Critical patent/EP1726761A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/50—Power-operated mechanisms for wings using fluid-pressure actuators
    • E05F15/57—Power-operated mechanisms for wings using fluid-pressure actuators for vertically-sliding wings
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Type of wing
    • E05Y2900/55—Windows
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40584—Assemblies of multiple valves the flow control means arranged in parallel with a check valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/76—Control of force or torque of the output member

Definitions

  • the present invention relates to a pneumatic window lift meant to be installed on vehicle doors.
  • the window lift has at least two basic functions performed by specific pneumatic circuits, namely: regulation of the position and control of the overload pinching during the window motion; secondarily, it also provides control of the speed and braking when the window is in a certain position without being actuated.
  • the regulation of the position allows to establish intermediate points at which the window stops in order to determine degrees of partial opening.
  • Control of the speed allows the upward and downward speed to be identical despite the action of gravity, which favours the downward motion.
  • the clipping function allows a partial descent and elimination of the upward force on the window when it is detected that the elevation movement is hindered.
  • the clearest example of this is when a person's hand is caught by the window while it is being raised.
  • Cable electrical window lifts are heavy and bulky. Their weight increases the inertia, so that when the door is closed this greater inertia requires stronger supports and retaining means. It also requires a greater area of the door to be moisture resistant. Lastly, the presence of numerous cables is also reduced by the use of pneumatic circuits, which also implies a considerable decrease in the cost of the window lift.
  • Pneumatic actuation to raise and lower windows is already known in specific solutions that in principle require a large volume, due to the use of the actuators, the control and the space reserved to the various elements involved in driving the window.
  • Japanese patent with publication number JP11050742 describes a window raising and lowering mechanism for automobile doors that incorporates a pneumatic motor whose output drives a worm gear. The displacement produced by the action of the worm gear is used in the angular motion of a set of arms that act as levers to move the window.
  • patent with publication number DE3103238 does not require any hinged arms nor pneumatic motors; instead, it provides an indirect drive from a pneumatic cylinder using guided cables.
  • the double action is achieved by using drive and descent cables that reach both ends of the double-action cylinder.
  • the present invention consists of a pneumatic window lift that incorporates the functions of position control, speed control, pinching and brake, providing a high integration and minimum space requirements.
  • the present invention consists of a pneumatic window lift that uses a circuit with a design that can incorporate and in turn integrate other pneumatic circuits that can perform four functions:
  • the upward and downward movements are performed by rod-less actuators, which unite the drive and guide functions of the window anchor point.
  • the transmission is linear and is direct, as there are no additional means such as cables or arms for transmitting the movement to the window, instead being connected directly to the actuator through a carriage guided by the actuator casing.
  • a detail of interest is that the rod-less construction of the pneumatic piston reduces the weight and volume compared to conventional rod pistons. This configuration allows to unite the drive and guide functions in a single component.
  • the window lift is very compact, reducing the weight and volume compared to a conventional electrical system.
  • the door volume required for moisture-sensitive elements is smaller. This increased compactness also implies a greater ease of assembly compared to the conventional system.
  • This window lift also allows to locate the electronics in the control buttons and to locate the valve actuation electromagnets near it.
  • Figure 1 is a schematic representation of the pneumatic circuit of an example of embodiment of the invention when it acts on the window lift.
  • Figure 2 is a schematic representation of the pneumatic circuit of the invention when it acts to lower the window.
  • Figure 3 is a schematic representation of the pneumatic circuit of the invention in a static situation.
  • Figures 4A, 4B, and 4C are schematic representations of a slide valve by way of example of the embodiment used for the detailed description of the invention.
  • Figure 4A represents only the casing with the set of openings allowing the entry and exit of fluid, while figures 4B and 4C show to end positions of the slide valve.
  • Figure 5 is a schematic representation of the assembly formed by the window and the rod-less linear actuator.
  • Figure 1 shows, on the left side in a dotted-line box, the set of devices constituting the fluid conditioning system.
  • the circuit starts at the pressurised fluid intake (1) from a deposit placed after a drive pump; neither is shown in the figure.
  • the fluid passes through a filter (2) after which a pressure regulator (3) sets the maximum working pressure of the entire pneumatic circuit.
  • a pressure gauge (4) provides the signal that indicates when the drive pump must be turned on to fill the deposit in order to reach a higher pressure.
  • the moving elements When operating at low temperatures, the moving elements may lock due to condensation and formation of ice inside the circuit. This requires working with dry air. To obtain this dry air, the system may use a membrane dryer (not shown). To prevent these situations it is convenient to incorporate this air drying system.
  • the ways are represented by lines joined to the box that represents the resting or initial position. When the way is closed and there are no communications two lines forming a T-shape are shown.
  • the positions are represented by the adjacent squares. Each square is a possible position.
  • the pilot signal input that selects each position. This selection can be performed, for example, by electrically exciting solenoids that impel a core which changes the valve position.
  • the zigzag line indicates the presence of a spring that determines a preferred position when there is no pilot signal.
  • figures 4A, 4B and 4C show an example of a slide valve.
  • Figure 4A is the casing with the five ways consisting of orifices that communicate to a common internal cavity.
  • This internal cavity is a slide formed by four pistons separated by a common rod, so that a chamber is defined between the pistons.
  • Figure 1 shows the direction of flow of the fluid in the window lift operation.
  • the types of arrow used to represent the flow object of the description are as follows:
  • the window lowering operation is shown in figure 2.
  • Activation of the solenoid on the upper part causes a downwards displacement of the valve slide, so that the ways 1 (V.1) and 4 (V.4) and the ways 2 (V.2) and 3 (V.3) are connected.
  • the fluid After passing through the main valve (5), the fluid is led to the second unidirectional regulator (B).
  • the check valve (10) allows the flow, so that it will not pass through the strangling (9), which offers a greater resistance.
  • the fluid impels the piston (6.1) of the piston (6) that drives the window (15) in a downward sense, so that it forces the other chamber to discharge.
  • the discharge fluid passes through the first regulator (A) and, as its check valve (8) prevents its passage, it is forced to pass through the strangling (7).
  • the flow After passing the first unidirectional regulator (A), the flow reaches and passes the main distribution valve (5) and reaches the atmosphere.
  • the fluid does not only change its direction of flow after it passes the main valve (5), but also in either direction it interchanges the flow through the check valve (8, 10) or through the strangulation (7, 9). Although one strangulation is always passed, allowing to adjust the fluid flow and therefore the speed of displacement of the window (15), this adjustment is different: in the raising operation the strangulation (9) is used, and in the lowering operation a different strangulation (7) is used.
  • the differentiated adjustment of the two strangulations (7, 9) allows to make the displacement speeds in the two directions the same, compensating for example the effect of gravity.
  • Figures 1, 2 and 3 shows an auxiliary line (11) that begins at the supply line and reaches a differential pressostat (12).
  • the differential pressostat (12) is located between the input at the upper cylinder chamber and the main pressure line.
  • the mission of the differential pressostat (12) is to detect an excessively low pressure in the cylinder discharge.
  • the pressure in the discharge chamber is understood to be below the reference value corresponding to a predetermined criterion that determines the existence of pinching.
  • the pinching pressostat produces a state change in a switch, a button, used as a pinching input signal for the electronic system.
  • Pinching can also be detected by the pressure difference between the inlet and outlet of the discharge strangler (9), as a reduced pressure difference will be due to a slower speed of the piston (6.1).
  • figures 1, 2 and 3 show on their bottom part a second distribution valve (13) that acts with a pressure piston (14) on a brake.
  • the distribution valve (13) consists of a three-way, three-position valve piloted by the pilot lines of the main valve (5). This means that each position of the main valve (5) corresponds to a position of the brake distribution valve (13).
  • the brake is a friction element that rubs directly or indirectly against the window (15) or an element joined to the window (15). The brake must be released to allow any movement of the window (15), whether up or down.
  • the rest position is the central position of the valve, as shown in figure 3. In this rest position the pressure line is internally closed, while the cylinder line is in discharge. At this position the brake cylinder or piston (14) is retracted by the action of the spring (14.1), braking the window (15) by a clamp that is activated by the spring (14.1).
  • any of the raising or lowering positions corresponding to he end positions of the distribution valve (13) establish a similar configuration of communication between lines: the pressurised fluid inlet occurs in way 1 (W.1), the outlet occurs in way 2 (W.2) with a direct connection to the brake piston (14) and the way 3 (W.3) is used for discharge.
  • the brake distributor acts as a three-way, two-position (cylinder at rest and actuated) valve. It is provided with three positions because the physical execution of the system with a two-position piloted valve would require an element to detect any of the possible activations of the main valve (5) keeping separate the two pilot lines.
  • Another possible embodiment consists of making the brake valve (13) a three-way, two-position valve with electric activation. This possibility would imply the need for a third solenoid and its activation electrical line, as well as requiring an electrical output of the electronic circuit activated whenever any of the outputs is activated corresponding to the raising or lowering operations of the window (15).
  • All the pneumatic components, except the actuators, can be constructed on a single casing: distribution valves (5, 13), strangulators (7, 9) and check valves (8, 10), as well as the pinching pressostat (13).
  • the stranglers (7, 9) and the check valves (8, 10) can be integrated in the same device.
  • the configuration is based on hollow cylinders inserted in the valve block, so that their behaviour as stranglers is determined by their length and the difference in diameter between the cylinder and the sleeve.
  • One example of the embodiment of the differential pressostat (12) is that constituted by a membrane that divides and the two chambers and seals them from each other.
  • the pressure difference between the two chambers causes the deformation of the membrane towards one side, where a sensor can be installed.
  • the adjustment of the relative position between the membrane and the sensor using a button will determine the pressure difference value that triggers the output signal. This adjustment can be performed with an externally driven screw.
  • the pressure difference that triggers the pressostat is defined by the membrane rigidity and the distance between the button and the membrane surface in its rest position.
  • the actuator construction selected is a rod-less piston.
  • Figure 5 shows a schematic representation of an embodiment. This solution has the special characteristic that the free length required for implementation in the system is slightly larger than the piston race, which allows a direct coupling to the window (15) and avoids the need for an additional transmission system.
  • This actuator will perform the drive function and the guide function: the carriage (16) to which the window (15) is connected is guided along the actuator casing (18). In figure 5 the carriage (16) is guided as it slides along a groove (17), allowing the mechanical dependence of the carriage (16) on the outside and the piston that moves on the inside of the casing (18).
  • the piston is coupled to the carriage (16) by the magnetic attraction between them.
  • the piston comprises a non-magnetic sleeve that acts as a casing (18). This sleeve is externally surrounded by magnetic elements joined to the carriage (16) that slides on it. Inside it is the plunger, constituted by sealing elements and a sealing elements and a set of magnetic elements.
  • the casing (18) together with its bases constitutes a sealed and rigid vessel.
  • the casing (18) is grooved (17) along its entire length and a sheet closes the groove (17) on the inside. This sheet is deformed at the level of the plunger and follows its shape to allow passage of the coupling of the carriage (16) to the inside of the casing 818).
  • the displacement of the carriage (16) is forced by coupling the shapes of the plunger and the coupling of the carriage (16).
  • a disadvantage of this type of pistons compared to those with a magnetic coupling is that they show greater mechanical losses and a greater likelihood of leaks. Their advantage is that they provide a mechanically robust link between the plunger and the carriage (16).
  • a specific embodiment of a piston with mechanical coupling has an actuator with two independent, sealed flexible chambers separated by a plunger inside a rigid casing (18). In it two elastic bellows are used as the independent sealed chambers.
  • the logic system consists of an electronic system with two outputs, corresponding to the actuation signals of the main valve of the pneumatic circuit.
  • the system inputs are all digital and correspond to:
  • the electronic system outputs correspond to the activation of the valve piloting solenoids, acting on the previously described circuit according to the aforementioned input signals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
EP05381024A 2005-05-24 2005-05-24 Dispositif lève-vitre pneumatique Withdrawn EP1726761A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05381024A EP1726761A1 (fr) 2005-05-24 2005-05-24 Dispositif lève-vitre pneumatique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05381024A EP1726761A1 (fr) 2005-05-24 2005-05-24 Dispositif lève-vitre pneumatique

Publications (1)

Publication Number Publication Date
EP1726761A1 true EP1726761A1 (fr) 2006-11-29

Family

ID=35058956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05381024A Withdrawn EP1726761A1 (fr) 2005-05-24 2005-05-24 Dispositif lève-vitre pneumatique

Country Status (1)

Country Link
EP (1) EP1726761A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8493081B2 (en) 2009-12-08 2013-07-23 Magna Closures Inc. Wide activation angle pinch sensor section and sensor hook-on attachment principle
US9234979B2 (en) 2009-12-08 2016-01-12 Magna Closures Inc. Wide activation angle pinch sensor section

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223404A (en) * 1959-12-30 1965-12-14 Daimler Benz Ag Auxiliary installation for actuation of movable body parts of motor vehicles
US4827415A (en) * 1982-02-12 1989-05-02 Wabco Fahrzeugbremsen Gmbh Electropneumatic door control system
DE19952591A1 (de) * 1999-11-02 2001-05-10 Daimler Chrysler Ag Hydrauliksystem

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223404A (en) * 1959-12-30 1965-12-14 Daimler Benz Ag Auxiliary installation for actuation of movable body parts of motor vehicles
US4827415A (en) * 1982-02-12 1989-05-02 Wabco Fahrzeugbremsen Gmbh Electropneumatic door control system
DE19952591A1 (de) * 1999-11-02 2001-05-10 Daimler Chrysler Ag Hydrauliksystem

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8493081B2 (en) 2009-12-08 2013-07-23 Magna Closures Inc. Wide activation angle pinch sensor section and sensor hook-on attachment principle
US9234979B2 (en) 2009-12-08 2016-01-12 Magna Closures Inc. Wide activation angle pinch sensor section
US9417099B2 (en) 2009-12-08 2016-08-16 Magna Closures Inc. Wide activation angle pinch sensor section

Similar Documents

Publication Publication Date Title
US4746093A (en) Piloted valve
US5118169A (en) Control valve device
WO1999061827A1 (fr) Vanne a commande electrique
US4966194A (en) Four-way switching valve device
GB2171754A (en) A control mechanism for a door of a motor vehicle
RU99112128A (ru) Устройство фиксирования штока гидравлического домкрата
US20020029811A1 (en) Pneumatic volume booster for valve positioner
US6592095B2 (en) Electromagnetic valve motion control
US6330798B1 (en) Hydraulic system with shadow poppet valve
US7147006B2 (en) Pilot operated valve
US2633871A (en) Electromagnetic control valve device for fluid pressure systems or the like
JPH09512329A (ja) 自己の媒体によって作動するバルブ
EP1726761A1 (fr) Dispositif lève-vitre pneumatique
US4391296A (en) By-pass pilot operated hydraulic check valve
ATE274631T1 (de) Hydraulische betätigungsvorrichtung für verschlussanordnung
PL166561B1 (pl) Zespól do sterowania ruchem w góre i w dól hydraulicznego podnosnika PL
KR20020030792A (ko) 유압식 승강기를 위한 제어밸브유닛
HU209981B (en) Door actuating device
US5174189A (en) Fluid control apparatus
JPH01502840A (ja) 手動操作用油圧単ピストンポンプ
US5044399A (en) Switch valve
EP0310733B1 (fr) Actionneur hydropneumatique pour véhicules automobiles
WO2003031855A1 (fr) Soupape pilotee
HU195290B (en) Control valve for double-acting pneumatic working cylinders
JP2974457B2 (ja) パイロット作動式電動弁

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR LV MK YU

17P Request for examination filed

Effective date: 20070418

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20071105

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20090420