EP1632453B1 - Device for emergency lowering of a load support on a fork lift - Google Patents

Device for emergency lowering of a load support on a fork lift Download PDF

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Publication number
EP1632453B1
EP1632453B1 EP05016958A EP05016958A EP1632453B1 EP 1632453 B1 EP1632453 B1 EP 1632453B1 EP 05016958 A EP05016958 A EP 05016958A EP 05016958 A EP05016958 A EP 05016958A EP 1632453 B1 EP1632453 B1 EP 1632453B1
Authority
EP
European Patent Office
Prior art keywords
cable
bypass
handle
valve block
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.)
Expired - Lifetime
Application number
EP05016958A
Other languages
German (de)
French (fr)
Other versions
EP1632453A3 (en
EP1632453A2 (en
Inventor
Thomas Dipl.-Ing. Stolten
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.)
Jungheinrich AG
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Jungheinrich AG
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
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Publication of EP1632453A2 publication Critical patent/EP1632453A2/en
Publication of EP1632453A3 publication Critical patent/EP1632453A3/en
Application granted granted Critical
Publication of EP1632453B1 publication Critical patent/EP1632453B1/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • 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
    • F15B20/002—Electrical failure
    • 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 a device for emergency lowering of a load-bearing means in a stacker according to the preamble of patent claim 1.
  • the load carrying means is raised and lowered by means of at least one hydraulic cylinder.
  • a control valve is connected to selectively hold a load in a raised position, to raise or lower the load. It may be the case that when the load is raised, a failure or failure of the electrical or hydraulic supply occurs, and the operator is unable to lower the load by operating the control valve. In this case, a device is required to initiate a so-called emergency lowering.
  • shut-off valve is manually operable and can be opened in an emergency, which safely lowers the lifted load and places the vehicle in a safe condition.
  • the manual valve is located in an area of the vehicle that can be reached by the operator without the risk of being involuntarily actuated.
  • the invention has for its object to provide a device for emergency lowering of a load-bearing means in a truck, which is easy to install, requires very little space and can be realized by simple means.
  • the bypass is formed by a bypass branch in the valve block.
  • a screw-shaped locking element with an externally threaded portion is screwed into a threaded bore of the valve block.
  • a torque transmitting cable is rotatably connected to the end of the locking element.
  • a handle for the rotation of the rope is attached.
  • the blocking element is designed in the manner of a grub screw, which is known to have a tip which engages in a correspondingly shaped recess at the bottom of the threaded bore when the blocking element is in the shut-off position.
  • the blocking element may itself comprise an element, e.g. Press a ball against a seat to lock the bypass branch.
  • the cable or the flexible shaft is rotatably mounted near the handle in a stationary opening.
  • the handle for example, a hexagon, is arranged so that it can be reached by the operator in an emergency, without the risk that it will be operated unintentionally.
  • the solution according to the invention has several advantages.
  • the required components for the realization of the device are extremely simple and small in number.
  • the operating cable or the flexible shaft can be laid very easily.
  • the assembly costs are extremely low.
  • the entire device requires a small footprint.
  • Fig. 1 shown hydraulic circuit is used to operate a reach truck.
  • Three hydraulic cylinders 10 are used in stages for raising and lowering a load fork 12, which is shown adjacent in some operating positions.
  • Two hydraulic cylinders 14 are used to tilt the fork 12, a double cylinder 16 is used to move the fork according to arrow 18, another hydraulic cylinder 20 is used to advance the mast, not shown.
  • the side thrust cylinder 16 is at the right end of Fig. 1 once again exposed.
  • the control valve arrangement for actuating the individual hydraulic cylinders is accommodated in a valve block 22. It also contains a control valve 24 for actuating the hydraulic cylinders 10.
  • the hydraulic cylinders 10 are supplied via a pump 26, which draws hydraulic medium from a tank 28.
  • the control valve 24 has three positions, namely a first position for lifting the cylinder 10, a neutral position in which the hydraulic cylinders are shut off from the hydraulic supply and a lowering position, in which the hydraulic medium from the cylinder 10 is fed back into the tank 28. This is not described in detail and for the invention also immaterial.
  • Another control valve 28a is for actuating the hydraulic cylinders 14 to tilt.
  • a control valve 30 serves to actuate the hydraulic cylinder for pushing the mast.
  • a control valve 32 serves to displace the fork 12.
  • Valve block 22 is a block-like, solid housing that forms a plurality of channels and valves. Of the cylinders 10 leads a line 38 via the terminal A in the Block 22, in which a channel 40 is formed, which is guided via the control valve 24 to the port P for the pump 26. From the control valve 24, a second channel 40 leads to the port T for the tank 28.
  • the other channels and valve arrangements in the valve block 22 will not be further described as they are generally state of the art.
  • a bypass channel 42 is provided, which opens at 44 in the channel 40 and at 46 in the return flow 40.
  • a threaded bore 48 is formed, into which a locking element 50 is screwed from the outside in the form of a grub screw.
  • the grub screw which has a pointed end, closes the channel 42 in the fully screwed-in position so that the flow of a medium in both directions is blocked.
  • the locking member 50 is unscrewed slightly, the passage is free, and the hydraulic medium can flow back from the cylinders 10 to the tank 28.
  • a flexible shaft or a cable 52 is rotatably connected, via which a torque can be transmitted.
  • the other end of the rope 52 is shown as it is rotatably mounted in an opening 54 of a bearing member 56.
  • a hex 58 is rotatably connected in the form of an external hexagon or a hexagon socket. With the aid of the hexagon 58, a torque can be exerted on the blocking element 50 in order to rotate the blocking element 50 from the closed state into the open state.
  • the handle 58 is for example housed in the driver's cab (not shown) in such a way that it can not be involuntarily actuated, but on the other hand is operable in any operating condition of the vehicle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Combustion & Propulsion (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur Notabsenkung eines Lasttragmittels bei einem Stapler nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for emergency lowering of a load-bearing means in a stacker according to the preamble of patent claim 1.

Üblicherweise wird das Lasttragmittel, zumeist eine Lastgabel, mit Hilfe mindestens eines hydraulischen Zylinders angehoben und abgesenkt. In der Zuleitung zum hydraulischen Zylinder ist ein Steuerventil geschaltet, um wahlweise eine Last in einer angehobenen Stellung zu halten, die Last anzuheben oder diese abzusenken. Es kann der Fall eintreten, dass bei angehobener Last ein Fehler oder ein Ausfall der elektrischen bzw. der hydraulischen Versorgung auftritt, und der Bediener durch Betätigung des Steuerventils nicht in der Lage ist, die Last abzusenken. Für diesen Fall ist eine Vorrichtung erforderlich, um eine sogenannte Notabsenkung einzuleiten.Usually, the load carrying means, usually a fork, is raised and lowered by means of at least one hydraulic cylinder. In the supply line to the hydraulic cylinder, a control valve is connected to selectively hold a load in a raised position, to raise or lower the load. It may be the case that when the load is raised, a failure or failure of the electrical or hydraulic supply occurs, and the operator is unable to lower the load by operating the control valve. In this case, a device is required to initiate a so-called emergency lowering.

Es ist allgemein bekannt, zwischen dem hydraulischen Zylinder und einem Tank für das Hydraulikmedium eine Leitung anzuordnen und in dieser ein Sperrventil zu schalten, das normalerweise die Leitung absperrt. Das Absperrventil ist von Hand betätigbar und kann im Notfall geöffnet werden, wodurch die angehobene Last sicher gesenkt und das Fahrzeug in einen sicheren Zustand gebracht wird. Das Handventil liegt in einem Bereich des Fahrzeugs, der vom Bediener zu erreichen ist, ohne dass die Gefahr besteht, dass es unwillkürlich betätigt wird.It is well known to arrange a line between the hydraulic cylinder and a tank for the hydraulic medium and to switch in this a check valve, which normally shuts off the line. The shut-off valve is manually operable and can be opened in an emergency, which safely lowers the lifted load and places the vehicle in a safe condition. The manual valve is located in an area of the vehicle that can be reached by the operator without the risk of being involuntarily actuated.

Aus DE 199 16 056 A1 ist bekannt geworden, in einer Leitung ein Nadelventil anzuordnen, das federvorgespannt in die Sperrstellung gebracht ist. Ein in der Fahrerkabine in einem separaten Kasten angeordneter Betätigungshebel wirkt über ein Zugseil (Bowdenzug) auf ein Hebelgestänge, das seinerseits mit dem Nadelventil in Verbindung steht. Durch die Betätigung des Hebels kann das Nadelventil in den Öffnungszustand gebracht werden, um die Notabsenkung zu bewerkstelligen.Out DE 199 16 056 A1 It has become known to arrange a needle valve in a line which is spring-biased brought into the blocking position. An operating lever arranged in the driver's cab in a separate box acts via a pull cable (Bowden cable) on a lever linkage, which in turn is connected to the needle valve. By operating the lever, the needle valve can be brought into the open state to accomplish the emergency lowering.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Notabsenkung eines Lasttragmittels bei einem Stapler zu schaffen, die einfach montierbar ist, sehr wenig Raum benötigt und mit einfachen Mitteln verwirklicht werden kann.The invention has for its object to provide a device for emergency lowering of a load-bearing means in a truck, which is easy to install, requires very little space and can be realized by simple means.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is solved by the features of patent claim 1.

Bei der erfindungsgemäßen Vorrichtung ist der Bypass von einem Bypasszweig im Ventilblock gebildet. In dem Bypasszweig ist ein schraubenförmiges Sperrelement mit einem Außengewindeabschnitt in eine Gewindebohrung des Ventilblocks eingeschraubt. In der vollständig eingeschraubten Stellung wird dadurch der Bypasszweig abgesperrt. Ein ein Drehmoment übertragendes Seil ist drehfest mit dem Ende des Sperrelements verbunden. Am anderen Ende des Seils ist eine Handhabe für die Drehung des Seils angebracht.In the device according to the invention, the bypass is formed by a bypass branch in the valve block. In the bypass branch, a screw-shaped locking element with an externally threaded portion is screwed into a threaded bore of the valve block. In the fully screwed position thereby the bypass branch is shut off. A torque transmitting cable is rotatably connected to the end of the locking element. At the other end of the rope a handle for the rotation of the rope is attached.

Nach der Erfindung ist das Sperrelement nach Art einer Madenschraube ausgebildet, welche bekanntlich eine Spitze aufweist, die in eine entsprechend geformte Ausnehmung am Boden der Gewindebohrung eingreift, wenn das Sperrelement in der Absperrstellung ist. Das Sperrelement kann seinerseits ein Element, z.B. eine Kugel, gegen einen Sitz drücken, um den Bypasszweig zu sperren.According to the invention, the blocking element is designed in the manner of a grub screw, which is known to have a tip which engages in a correspondingly shaped recess at the bottom of the threaded bore when the blocking element is in the shut-off position. The blocking element may itself comprise an element, e.g. Press a ball against a seat to lock the bypass branch.

Das Seil oder die flexible Welle ist nahe der Handhabe in einer stationären Öffnung drehbar gelagert. Die Handhabe, zum Beispiel ein Sechskant, ist so angeordnet, dass sie vom Bediener im Notfall erreicht werden kann, ohne dass Gefahr besteht, dass sie unabsichtlich betätigt wird.The cable or the flexible shaft is rotatably mounted near the handle in a stationary opening. The handle, for example, a hexagon, is arranged so that it can be reached by the operator in an emergency, without the risk that it will be operated unintentionally.

Die erfindungsgemäße Lösung weist mehrere Vorteile auf. Die erforderlichen Bauteile zur Verwirklichung der Vorrichtung sind äußerst einfach und gering in ihrer Anzahl. Das Betätigungsseil oder die flexible Welle kann sehr einfach verlegt werden. Die Montageaufwendungen sind äußerst gering. Die gesamte Vorrichtung erfordert einen geringen Platzbedarf.The solution according to the invention has several advantages. The required components for the realization of the device are extremely simple and small in number. The operating cable or the flexible shaft can be laid very easily. The assembly costs are extremely low. The entire device requires a small footprint.

Die Erfindung soll nachfolgend anhand eines in Zeichnungen dargestellten Ausführungsbeispiels näher erläutert werden.

Fig. 1
zeigt einen schematischen Schaltplan für einen Schubmaststapler mit einer Vorrichtung nach der Erfindung
Fig. 2
zeigt äußerst schematisch eine Handhabe für die Vorrichtung nach der Erfindung.
The invention will be explained in more detail with reference to an embodiment shown in the drawings.
Fig. 1
shows a schematic circuit diagram for a reach truck with a device according to the invention
Fig. 2
shows very schematically a handle for the device according to the invention.

Die in Fig. 1 dargestellte hydraulische Schaltung dient zum Betrieb eines Schubmaststaplers. Drei Hydraulikzylinder 10 dienen stufenweise zum Anheben und zum Absenken einer Lastgabel 12, die nebenstehend in einigen Betriebspositionen gezeigt ist. Zwei Hydraulikzylinder 14 dienen zum Neigen der Lastgabel 12, ein Doppelzylinder 16 dient zum Verschieben der Lastgabel gemäß Pfeil 18, ein weiterer Hydraulikzylinder 20 dient dem Vorschub des nicht gezeigten Mastes. Der Seitenschubzylinder 16 ist am rechten Ende von Fig. 1 noch einmal herausgestellt.In the Fig. 1 shown hydraulic circuit is used to operate a reach truck. Three hydraulic cylinders 10 are used in stages for raising and lowering a load fork 12, which is shown adjacent in some operating positions. Two hydraulic cylinders 14 are used to tilt the fork 12, a double cylinder 16 is used to move the fork according to arrow 18, another hydraulic cylinder 20 is used to advance the mast, not shown. The side thrust cylinder 16 is at the right end of Fig. 1 once again exposed.

Die Steuerventilanordnung zur Betätigung der einzelnen Hydraulikzylinder ist in einem Ventilblock 22 untergebracht. Er enthält auch ein Steuerventil 24 zur Betätigung der Hydraulikzylinder 10. Die Versorgung der Hydraulikzylinder 10 erfolgt über eine Pumpe 26, die Hydraulikmedium aus einem Tank 28 ansaugt. Das Steuerventil 24 hat drei Stellungen, nämlich eine erste Stellung zum Anheben der Zylinder 10, eine Neutralstellung, in der die Hydraulikzylinder von der Hydraulikversorgung abgesperrt sind und eine Senkenstellung, in der das Hydraulikmedium aus dem Zylinder 10 in den Tank 28 zurückgefördert wird. Dies ist im einzelnen nicht beschrieben und für die Erfindung auch unwesentlich.The control valve arrangement for actuating the individual hydraulic cylinders is accommodated in a valve block 22. It also contains a control valve 24 for actuating the hydraulic cylinders 10. The hydraulic cylinders 10 are supplied via a pump 26, which draws hydraulic medium from a tank 28. The control valve 24 has three positions, namely a first position for lifting the cylinder 10, a neutral position in which the hydraulic cylinders are shut off from the hydraulic supply and a lowering position, in which the hydraulic medium from the cylinder 10 is fed back into the tank 28. This is not described in detail and for the invention also immaterial.

Ein weiteres Steuerventil 28a dient zur Betätigung der Hydraulikzylinder 14 zum Neigen. Ein Steuerventil 30 dient zu Betätigung des Hydraulikzylinders zum Schieben des Mastes. Ein Steuerventil 32 dient zur Verschiebung der Lastgabel 12.Another control valve 28a is for actuating the hydraulic cylinders 14 to tilt. A control valve 30 serves to actuate the hydraulic cylinder for pushing the mast. A control valve 32 serves to displace the fork 12.

Die Betätigung der Steuerventile 24, 28a, 30 und 32 ist elektromagnetisch, wie an sich bekannt. Die Steuerventile 24 bis 32 sowie eine weitere Ventilanordnung 36 sind in dem Ventilblock 22 untergebracht. Der Ventilblock 22 ist ein blockartiges, massives Gehäuse, das eine Vielzahl von Kanälen und Ventilen ausbildet bzw. enthält. Von den Zylindern 10 führt eine Leitung 38 über den Anschluss A in den Block 22, in dem ein Kanal 40 ausgebildet ist, der über das Steuerventil 24 zum Anschluss P für die Pumpe 26 geführt ist. Von dem Steuerventil 24 führt ein zweiter Kanal 40 zum Anschluss T für den Tank 28. Die anderen Kanäle und Ventilanordnungen im Ventilblock 22 werden nicht weiter beschrieben, da sie allgemein zum Stand der Technik gehören.The actuation of the control valves 24, 28a, 30 and 32 is electromagnetic as known per se. The control valves 24 to 32 and a further valve arrangement 36 are accommodated in the valve block 22. Valve block 22 is a block-like, solid housing that forms a plurality of channels and valves. Of the cylinders 10 leads a line 38 via the terminal A in the Block 22, in which a channel 40 is formed, which is guided via the control valve 24 to the port P for the pump 26. From the control valve 24, a second channel 40 leads to the port T for the tank 28. The other channels and valve arrangements in the valve block 22 will not be further described as they are generally state of the art.

Im Ventilblock 22 ist ein Bypasskanal 42 vorgesehen, der bei 44 in den Kanal 40 mündet und bei 46 in den Rückströmkanal 40. In den Ventilblock 22 ist eine Gewindebohrung 48 geformt, in die von außen ein Sperrelement 50 in Form einer Madenschraube eingeschraubt ist. Die Madenschraube, die ein spitzes Ende aufweist, schließt in der vollständig eingeschraubten Stellung den Kanal 42 ab, so dass der Durchfluss eines Mediums in beiden Richtungen gesperrt ist. Wird das Sperrelement 50 jedoch etwas herausgeschraubt, wird der Durchgang frei, und das Hydraulikmedium kann aus den Zylindern 10 zum Tank 28 zurückfließen.In the valve block 22, a bypass channel 42 is provided, which opens at 44 in the channel 40 and at 46 in the return flow 40. In the valve block 22, a threaded bore 48 is formed, into which a locking element 50 is screwed from the outside in the form of a grub screw. The grub screw, which has a pointed end, closes the channel 42 in the fully screwed-in position so that the flow of a medium in both directions is blocked. However, if the locking member 50 is unscrewed slightly, the passage is free, and the hydraulic medium can flow back from the cylinders 10 to the tank 28.

Mit dem äußeren Ende des Sperrelements 50 ist eine flexible Welle oder ein Seil 52 drehfest verbunden, über das ein Drehmoment übertragen werden kann. In Fig. 2 ist das andere Ende des Seils 52 dargestellt, wie es in einer Öffnung 54 eines Lagerbauteils 56 drehbar gelagert ist. Am Ende des Seils 52 ist ein Sechskant 58 in Form eines Außensechskants oder eines Innensechskants drehfest verbunden. Mit Hilfe des Sechskant 58 kann auf das Sperrelement 50 ein Drehmoment ausgeübt werden, um das Sperrelement 50 aus dem Schließzustand in den Öffnungszustand zu drehen.With the outer end of the locking element 50, a flexible shaft or a cable 52 is rotatably connected, via which a torque can be transmitted. In Fig. 2 the other end of the rope 52 is shown as it is rotatably mounted in an opening 54 of a bearing member 56. At the end of the rope 52, a hex 58 is rotatably connected in the form of an external hexagon or a hexagon socket. With the aid of the hexagon 58, a torque can be exerted on the blocking element 50 in order to rotate the blocking element 50 from the closed state into the open state.

Die Handhabe 58 ist zum Beispiel in der Fahrerkabine (nicht gezeigt) untergebracht und zwar in der Weise, dass sie nicht unwillkürlich betätigt werden kann, andererseits aber in jedem Betriebszustand des Fahrzeugs bedienbar ist.The handle 58 is for example housed in the driver's cab (not shown) in such a way that it can not be involuntarily actuated, but on the other hand is operable in any operating condition of the vehicle.

Claims (4)

  1. Device for the emergency lowering of a load carrying means for a stacker truck, in particular a reach-type forklift truck, with a valve arrangement accommodated in a valve block, via which the inflow and outflow of a hydraulic means is regulated to and from a lift cylinder for the load carrying means, with a bypass between the lift cylinder and a tank, with a barrier element in the bypass and an actuating device containing a cable which may be actuated by an operator and by means of which the barrier element may be brought into the open position, characterised in that the bypass is formed by a bypass branch (42) in the valve block (22), in that a screw-shaped barrier element (50) configured as a type of grub screw with its male thread portion is screwed into a threaded bore (48) of the valve block (22) and, in the fully screwed-in position, closes off the bypass branch (42), a cable (52) transmitting a torque is rotationally fixedly connected with one end to the grub screw (50) and a handle for turning the cable (52) is attached to the other end of the cable (52).
  2. Device according to claim 1, characterised in that the grub screw in turn actuates a shut-off element which is pressed against a seat in the closed position.
  3. Device according to claim 1 or 2, characterised in that the handle is formed by a hexagon (58).
  4. Device according to any one of claims 1 to 3, characterised in that the cable (52) is rotatably mounted in the vicinity of the handle (58) in a fixed aperture (54).
EP05016958A 2004-09-04 2005-08-04 Device for emergency lowering of a load support on a fork lift Expired - Lifetime EP1632453B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004042881A DE102004042881A1 (en) 2004-09-04 2004-09-04 Device for emergency lowering of a load-bearing means in a forklift

Publications (3)

Publication Number Publication Date
EP1632453A2 EP1632453A2 (en) 2006-03-08
EP1632453A3 EP1632453A3 (en) 2008-01-16
EP1632453B1 true EP1632453B1 (en) 2010-07-21

Family

ID=35457795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05016958A Expired - Lifetime EP1632453B1 (en) 2004-09-04 2005-08-04 Device for emergency lowering of a load support on a fork lift

Country Status (4)

Country Link
US (1) US7562616B2 (en)
EP (1) EP1632453B1 (en)
CN (1) CN100439231C (en)
DE (2) DE102004042881A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9902559B2 (en) * 2014-02-17 2018-02-27 The Curotto-Can, Llc Scale based load limiting mechanism for refuse vehicles with an intermediate container
US10183852B2 (en) 2015-07-30 2019-01-22 Danfoss Power Solutions Gmbh & Co Ohg Load dependent electronic valve actuator regulation and pressure compensation
CN112591674B (en) * 2020-08-21 2024-11-26 合肥紫均科技有限公司 A novel plug-in handle installation structure and installation method for electric handling equipment

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3598361A (en) * 1969-06-02 1971-08-10 Raymond W Crowe Apparatus for remotely operating drain valves
US3623698A (en) * 1970-01-30 1971-11-30 Ez Serve Inc Remote controlled oil and liquid drain valve
DE3120890A1 (en) * 1981-05-26 1983-01-05 Gustav Magenwirth Gmbh & Co, 7432 Urach Remote control system for valves
US4630629A (en) * 1986-03-07 1986-12-23 General Screw Products Company Valve with compressible valve stem and valve body seals
CN2058178U (en) * 1989-04-29 1990-06-13 彭昌宗 Static-hydraulic driving and eontrol system for fork lift truck
US5065983A (en) * 1990-04-03 1991-11-19 Safe-T-Jack, Inc. Hydraulic power unit for jack system
US5577876A (en) * 1994-02-22 1996-11-26 Clark Equipment Company Hydraulic interblock system
CN2218734Y (en) * 1994-11-04 1996-01-31 洪茂雄 Hydraulic jack with handle pipe resetting and locking device
DE19804398A1 (en) * 1998-02-04 1999-08-05 Linde Ag Control valve arrangement for a hydraulically powered vehicle
JP3900665B2 (en) * 1998-04-10 2007-04-04 株式会社豊田自動織機 Hydraulic control device for industrial vehicle
US5975496A (en) * 1998-05-29 1999-11-02 Norco Industries, Inc. Multiple pump transmission jack
SE512652C2 (en) * 1999-04-20 2000-04-17 Bt Ind Ab Apparatus for, and method of, movement of load carriers of industrial trucks
US6086047A (en) * 1999-07-07 2000-07-11 Lee; Steven Hydraulic jack
DE20208577U1 (en) * 2002-06-03 2003-12-11 Hawe Hydraulik Gmbh & Co. Kg Electro-hydraulic lift control device for industrial trucks
US6991216B1 (en) * 2003-06-12 2006-01-31 Inferno Manufacturing Corporation Valve

Also Published As

Publication number Publication date
DE102004042881A1 (en) 2006-03-09
US20060049688A1 (en) 2006-03-09
EP1632453A3 (en) 2008-01-16
CN100439231C (en) 2008-12-03
DE502005009936D1 (en) 2010-09-02
US7562616B2 (en) 2009-07-21
CN1746102A (en) 2006-03-15
EP1632453A2 (en) 2006-03-08

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