EP0937675A1 - Überwachungseinrichtung für Motor-Unterwassergreifer - Google Patents
Überwachungseinrichtung für Motor-Unterwassergreifer Download PDFInfo
- Publication number
- EP0937675A1 EP0937675A1 EP99101180A EP99101180A EP0937675A1 EP 0937675 A1 EP0937675 A1 EP 0937675A1 EP 99101180 A EP99101180 A EP 99101180A EP 99101180 A EP99101180 A EP 99101180A EP 0937675 A1 EP0937675 A1 EP 0937675A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gripper
- sensor
- motor
- computer
- data transmission
- 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
Links
- 238000012806 monitoring device Methods 0.000 title claims description 3
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract 1
- 238000011109 contamination Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- HYIMSNHJOBLJNT-UHFFFAOYSA-N nifedipine Chemical compound COC(=O)C1=C(C)NC(C)=C(C(=O)OC)C1C1=CC=CC=C1[N+]([O-])=O HYIMSNHJOBLJNT-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
- E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
- E02F3/4131—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device mounted on a floating substructure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/10—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for preventing cable slack
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
- B66C3/14—Grabs opened or closed by driving motors thereon
- B66C3/16—Grabs opened or closed by driving motors thereon by fluid motors
Definitions
- the invention relates to a monitoring device for motor underwater grippers according to the in the preamble of claim 1 specified features.
- the invention is based on the object Continuing training device to the extent that a reliable monitoring and control of the operating status of the Gripper is guaranteed.
- the crane system should, even under rough Use and operating conditions, a safe function and a long Have lifespan.
- the proposed facility is characterized by a functional Build up from and allows even the most difficult Conditions of safe operation.
- the gripper is at least a sensor is assigned, whose signals to a data transmission system to be passed to a via a bus line Control system to be transferred.
- the bus line is in expediently integrated into the rope and / or a supply cable and the control system is particularly programmable Tax system trained.
- the control system By means of the control system the signals or data from the sensor or sensors are evaluated and processed in particular in a control program.
- the control device expediently contains a frequency converter.
- a computer is preferably with the control system and / or a monitor for visualizing the relevant data.
- the proposed facility enables accurate at any time Knowledge of the operating status and quick recognition of possible malfunctions. If predefined limit values are exceeded can avoid a quick and purposeful response of damage. Furthermore, through trend detection unplanned, expensive downtimes of the crane system avoided and one timely planning of maintenance measures is made possible. In front everything is a safe protection of rough wood with underwater grabs enables.
- the speed control via the frequency converter mentioned ensures protection of the mechanics.
- the adjustment of the Motor speed and thus the cycle times and the delivery rate are dependent on the variable speed in a preferred manner of the material to be dredged can be carried out without any problems.
- By the Use of the tilt sensor is preferably tipping over of the gripper safely prevented.
- By means of the frequency converter also avoided current peaks when starting the motor and a Energy saving achieved. Finally, a Defined switch-off of the motor in predefinable end positions Gripper shells and, as a result, protection of the mechanics.
- Fig. 1 shows the gripper 4 suspended on a rope 2, which as Rope grabs or motor grabs, especially as motor hydraulic grabs, is trained.
- the gripper 4 contains two in a known manner Swiveling gripper shells 6, 7, one not shown here Hydraulic motor and a control box 8 with electronic components.
- a special cable is used to supply energy to the gripper 4 or a supply cable 5, which the gripper 4 in the lifting and Lowering movements over guide rollers is tracked.
- About these Line 5 is the supply of the built in the gripper Transducers and their evaluation electronics in the switch box 8.
- the measured values are transmitted via a line 5 Integrated, especially two-wire, bus cable.
- the integrated bus line data is transferred in one freely programmed control system 10 evaluated and subsequently on a computer 12, in particular an industrial PC 12 with a screen 14 transferred.
- the computer 12 contains a visualization program for the preparation of the data, in clear symbols to be displayed on the screen 14.
- Limit values can be specified and deviations from permissible values are immediately displayed to the operator optically or acoustically and at If necessary, the limit is exceeded immediately Switch off the drive.
- the computer 12 is also a printer 16 assigned to optionally connect every measured value, every message to be able to output with date and time.
- a control device 18 For the preferably in Gripper 4 arranged motor, by means of which the movement of the Gripper shells 6, 7 can be carried out, a control device 18 intended.
- This control device 18 contains appropriately a frequency converter, with a speed control Protection of the mechanics and adaptation of the engine speed enables and due to the variable speed cycle times and delivery rate are adaptable depending on the material.
- Fig. 2 shows a block diagram of the gripper 4 with an integrated data transmission system 20 with PROFIBUS.
- Via special line 5, which is preferably designed as a CORDAFLEX cable and in which the bus line is integrated will be connected to the data transmission system 20 transferred data or measured values of the following to the programmable sensor to be explained in detail Control system 10 transmitted.
- the oil pan 21 and the electronic control box 8 is in expediently provided a number of sensors.
- a sensor 23 for the oil temperature In the oil pan 21 is a sensor 23 for the oil temperature.
- a sensor 24 in the gripper is used for filter monitoring and in the oil pan 21 there is also a sensor 25 for the oil level intended.
- the degree of contamination of the Oil filter permanently recorded by means of differential pressure monitoring and further displayed by means of the computer 12 and / or screen. So the need to replace the oil filter can be recognized in good time and the filter must only be replaced when the predeterminable degree of pollution has been reached. In comparison with a filter exchange after predetermined time intervals achieved a significant improvement in operation.
- the gripper 4 also contains a transmitter 26 for the position indicator of the Gripper shells. Furthermore, there is a sensor 27 for the engine temperature, especially for the detection of an engine overtemperature intended.
- the screen can display the current position or inclination of the gripper 4 are monitored and in practice This can prevent a gripper from tipping over become.
- a predeterminable limit value of the inclination in particular the drive for lowering the gripper is switched off and / or the Motor for lifting the gripper can be switched on.
- the gripper shells are switched off.
- sensors 29 for detecting the closing pressure there are sensors 29 for detecting the closing pressure and a transmitter 30 for detecting the opening pressure is provided.
- the signals or data of the or the transmitter 23 to 30 to the data transmission system 20 handed over and into the supply cable or the special line 5 integrated bus lines to the programmable logic control system 10 transferred.
- the transducer 26 for the detection of the gripper shell position is preferably as an angle encoder and / or absolute encoder educated. Above all, the limit values for the delivery and delivery are adjustable by means of the computer 12, so that a setting on The gripper 4 itself is only required when the sensor is replaced is.
- the position of the gripper shells is always up to date on the Screen 14 of the computer 12 displayed and as a result of the exact Knowledge of the position of the gripper shells 6, 7 is a defined one Shutdown in the end positions and reliable detection of heavy wood enables.
- the sensor 25 for the oil level is preferred as a level sensor to record the oil level in the oil pan of the Hydraulic system trained.
- the limit values for warning, minimum level and maximum level can be directly on the screen of the computer 10 be changed so that a setting on the gripper 4 itself is not is required. Since the level of the oil pan 21 is always up to date Screen 14 of calculator 10 is displayed, both a Oil loss as well as a possible penetration of water into the Oil pan 21 can be recognized very early.
- the transmitter 23 for measuring the oil temperature is particularly designed as a PT 100 sensor and the so detected Temperature is displayed as an absolute value on the screen 14 of the computer 10 is displayed.
- the limit values for the oil temperature can also be set directly can be set via the computer 10, so that in turn a complex adjustment on the encoder or gripper itself is not necessary is.
- the transducers 29 and 30 for the closing pressure and Opening pressure of the gripper shells are particularly on the respective Cylinders of the gripper motor are arranged and are preferably over Pressure transmitter detected and as absolute values on the screen 14 of the computer 12 brought to the display. Also for the closing pressure and the opening pressure are the limit values by means of the computer 10 adjustable, without intervention on the gripper.
- the limit indicator 28 for the inclination of the gripper in expediently its inclination uniaxially across the cable suspension recorded and monitored and always up to date on the screen 14 of the Calculator 10 displayed.
- the limits for the allowable incline are likewise adjustable by means of the computer 10. If exceeded the allowable angle of inclination is within the scope of the invention the lowering movement of the gripper is switched off and thus with a high degree of safety a tilting of the gripper 4 is prevented. There will also be damage the traverse on which the gripper can be suspended is, the ropes 2, the special line or the supply cable 5 as a result prevent the gripper from tipping over with a high degree of certainty.
- the sensor 24 is used for filter monitoring and detection the degree of contamination of the oil filter, preferably by means of differential pressure monitoring. Via the computer 12 takes place on the Screen 14 a display, and a possibly necessary replacement of the Filters can be recognized in time. The filter must be replaced can only be carried out when the specified degree of contamination is reached. This will result in significant operational Advantages compared to a routine exchange according to specified Time intervals reached.
- the computer 12 connected to the control system 10 with a screen 14 and printer 16 enables visualization and if necessary Output of the data or measured values recorded in this way.
- the setting the limit values for the named measured values are given in expediently by means of the computer 12, without the gripper 4th interventions in this regard would be required.
- the changed limit values are immediately transferred to the control program.
- the calculator 12 contains a limit point 33 for the oil temperature, a limit point 34 for filter monitoring, a limit value point 35 for the Oil level.
- the respective limit values are on the Screen 14 can be displayed and by means of an input unit, in particular the keyboard or mouse of the computer in the required Enterable accordingly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Control And Safety Of Cranes (AREA)
- Earth Drilling (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
Description
- Fig. 1
- eine Prinzipdarstellung,
- Fig. 2
- eine Darstellung nach Art eines Blockschaltbildes.
- 2
- Seil
- 4
- Greifer
- 5
- Kabel / Spezialleitung
- 6, 7
- Greiferschale
- 8
- Schaltkasten
- 10
- Steuerungssystem
- 12
- Rechner
- 14
- Bildschirm
- 16
- Drucker
- 18
- Steuereinrichtung/Frequenzumformer
- 20
- Datenübertragungssystem
- 21
- Ölwanne
- 23 bis 30
- Meßwertgeber
- 33 bis 39
- Grenzwertstellen
Claims (11)
- Überwachungseinrichtung für Motor-Unterwassergreifer, wobei der Motor-Unterwassergreifer an einem Seil aufgehängt ist, dadurch gekennzeichnet,
daß wenigstens ein dem Greifer (4) zugeordneter Meßwertgeber (23 bis 30) vorgesehen ist und daß mittels eines Rechners (12) wenigstens ein Meßwert darstellbar ist. - Einrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß mittels des Rechners (12) ein Grenzwert für die Meßgröße vorgebbar ist, welche mittels des Meßwertgebers (23 bis 30) erfaßbar ist. - Einrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß ein Datenübertragungssystem (20) mit dem Meßwertgeber (23 bis 30) verbunden ist, welches insbesondere einen PROFIBUS enthält. - Einrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß das Datenübertragungssystem (20) bevorzugt auf dem Greifer (4) angeordnet und/oder in diesem integriert ist und/oder in einem Schaltkasten (8) des Greifers (4) angeordnet ist. - Einrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß ein speicherprogrammierbares Steuersystem (10) vorgesehen ist, welches mit dem Datenübertragungssystem (20) und/oder dem Meßwertgeber (23 bis 30) verbunden ist, wobei die Datenübertragung bevorzugt über eine Busleitung, insbesondere eine zweidrähtige Busleitung erfolgt. - Einrichtung nach Anspruch 5,
dadurch gekennzeichnet,
daß die Busleitung in ein Kabel oder eine Spezialleitung (5) integriert ist, über welche gleichfalls die Energieversorgung des Motors des Motorgreifers (4) erfolgt. - Einrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
daß das Steuersystem (10) mit einer Steuereinrichtung (18) für den Motor des Greifers (4) verbunden ist und/oder daß die Steuereinrichtung (18) einen Frequenzumformer enthält. - Einrichtung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
daß vorzugsweise der Rechner (12) Grenzwertstellen (33 bis 39) zur Vorgabe von Grenzwerten der mittels der Meßgeber (23 bis 30) erfaßbaren Meßgrößen aufweist. - Einrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
daß mittels des Meßwertgebers (28) die Neigung des Greifers (4) erfaßbar ist und/oder daß mittels des Meßwertgebers (26) die Stellung der Greiferschalen (6, 7) erfaßbar ist. - Einrichtung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet,
daß in einer Ölwanne (21) des Greifers (4) der Meßwertgeber (23) für die Öltemperatur und/oder der Meßwertgeber (24) für die Filterüberwachung und/oder der Meßwertgeber (25) für den Ölstand angeordnet sind. - Einrichtung nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet,
daß der Greifer (4) den Meßwertgeber (25) für die Überwachung des Ölstandes und/oder den Meßwertgeber (27) für die Erfassung der Motortemperatur und/oder den Meßwertgeber (29) für den Schließdruck und/oder den Meßwertgeber (30) für die Erfassung des Öffnungsdrucks der Greiferschalen (6, 7) enthält.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19806816 | 1998-02-18 | ||
| DE19806816A DE19806816B4 (de) | 1998-02-18 | 1998-02-18 | Motor-Unterwassergreifer mit Überwachungseinrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0937675A1 true EP0937675A1 (de) | 1999-08-25 |
| EP0937675B1 EP0937675B1 (de) | 2003-04-16 |
Family
ID=7858196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99101180A Expired - Lifetime EP0937675B1 (de) | 1998-02-18 | 1999-01-22 | Überwachungseinrichtung für Motor-Unterwassergreifer |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6134815A (de) |
| EP (1) | EP0937675B1 (de) |
| DE (2) | DE19806816B4 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7207127B2 (en) | 2003-07-03 | 2007-04-24 | Wolfgang Rohr Gmbh & Co. Kg | Hook-on grab bucket, in particular motor-driven underwater grab bucket |
| CN106586823A (zh) * | 2016-12-09 | 2017-04-26 | 长沙桑铼特农业机械设备有限公司 | 一种组合式抓斗及拖拉机 |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19900279C1 (de) * | 1999-01-07 | 2001-02-01 | Wolfgang Rohr | Verfahren und Vorrichtung zur Rückgewinnung von Feinsand von einem schwimmenden Gewinnungsgerät |
| DE10025603A1 (de) * | 2000-05-24 | 2001-11-29 | Pat Gmbh | Überwachungs- und Steuereinrichtung für Bau- oder Industriefahrzeuge |
| FR2953862B1 (fr) * | 2009-12-11 | 2011-12-16 | Ecl | Dispositif destine a collecter des debris solides dans une cuve d'electrolyse destinee a la production d'aluminium |
| WO2014169029A1 (en) * | 2013-04-09 | 2014-10-16 | Anvil Attachments | Monitoring a grabbing mechanism |
| EP2952634B1 (de) * | 2014-06-03 | 2019-03-13 | Enel Produzione S.p.A. | Greifereinrichtung mit einem schliessüberwachungssystem |
| NL2014296B1 (nl) * | 2015-02-13 | 2016-10-13 | Hendricus Liet Cornelis | Inrichting voor het losmaken van veevoer. |
| CN105438976B (zh) * | 2015-12-30 | 2017-06-30 | 上海佩纳沙士吉打机械有限公司 | 液压抓斗智能监测系统 |
| CN106741647B (zh) * | 2017-02-08 | 2018-10-26 | 哈尔滨工程大学 | 一种uuv海底驻留的锚泊装置及方法 |
| DE102017117637A1 (de) * | 2017-08-03 | 2019-02-07 | Turck Holding Gmbh | Sensorgerät und Verfahren zur Generierung eines Zustandssignals |
| JP6869510B2 (ja) * | 2017-11-30 | 2021-05-12 | ダイハツディーゼル株式会社 | 浚渫船用エンジンの過給システム |
| ES2929747T3 (es) | 2019-04-18 | 2022-12-01 | Bauer Maschinen Gmbh | Cuchara de muro pantalla y procedimiento para practicar una zanja en el suelo |
| NL2025060B1 (en) * | 2020-03-05 | 2021-10-14 | Verstegen Grijpers B V | Grab monitoring device |
| CN112663715B (zh) * | 2020-12-28 | 2022-11-04 | 中国三峡建设管理有限公司 | 一种水下清淤系统及方法 |
| FR3120096A1 (fr) * | 2021-02-24 | 2022-08-26 | Safran Aircraft Engines | Procédé et dispositif de génération d’alarme pour la surveillance d’un filtre à huile dans un aéronef |
| CN119850046B (zh) * | 2025-03-20 | 2025-06-20 | 中港疏浚有限公司 | 一种抓斗船施工质量分析智能管理系统 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2110352A1 (de) * | 1971-03-04 | 1972-09-14 | Demag Ag | Hydraulikgreifer mit einem elektrisch gesteuerten Motor |
| EP0219007A2 (de) * | 1985-10-12 | 1987-04-22 | Rohr GmbH | Abschaltvorrichtung für Krananlagen |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5189605A (en) * | 1989-10-10 | 1993-02-23 | The Manitowoc Company, Inc. | Control and hydraulic system for a liftcrane |
| US5297019A (en) * | 1989-10-10 | 1994-03-22 | The Manitowoc Company, Inc. | Control and hydraulic system for liftcrane |
| US5964256A (en) * | 1990-04-27 | 1999-10-12 | K.J. Manufacturing | Apparatus and method for changing oil in an internal combustion engine and simultaneously determining engine oil consumption and wear |
| DE4215739C2 (de) * | 1992-05-13 | 1995-11-30 | Kleinewefers Gmbh | Verfahren und Vorrichtung zum Beschicken und Entnehmen von mit einer Materialbahn bewickelten Rollen in einer einen Rollenträger mit mehreren Rollenplätzen aufweisenden Maschine zum Verarbeiten der Materialbahn, insbesondere einer Druckmaschine |
| US5443294A (en) * | 1993-09-22 | 1995-08-22 | Hawco Manufacturing Co. | Single-line clamshell bucket |
| US5553404A (en) * | 1994-05-17 | 1996-09-10 | Bergeron; Raymond C. | Power bucket |
| DE19514050C2 (de) * | 1995-04-13 | 1999-06-02 | Bruger & Fischer Krananlagen U | Verfahren und Vorrichtung zum Erfassen von Belastungen von Hub- und Zugeinrichtungen |
| US5995916A (en) * | 1996-04-12 | 1999-11-30 | Fisher-Rosemount Systems, Inc. | Process control system for monitoring and displaying diagnostic information of multiple distributed devices |
| US6024145A (en) * | 1998-04-08 | 2000-02-15 | Ackles; Gary | Articulated boom and head for manipulating objects under water |
-
1998
- 1998-02-18 DE DE19806816A patent/DE19806816B4/de not_active Expired - Lifetime
-
1999
- 1999-01-22 EP EP99101180A patent/EP0937675B1/de not_active Expired - Lifetime
- 1999-01-22 DE DE59905026T patent/DE59905026D1/de not_active Expired - Lifetime
- 1999-02-11 US US09/248,344 patent/US6134815A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2110352A1 (de) * | 1971-03-04 | 1972-09-14 | Demag Ag | Hydraulikgreifer mit einem elektrisch gesteuerten Motor |
| EP0219007A2 (de) * | 1985-10-12 | 1987-04-22 | Rohr GmbH | Abschaltvorrichtung für Krananlagen |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7207127B2 (en) | 2003-07-03 | 2007-04-24 | Wolfgang Rohr Gmbh & Co. Kg | Hook-on grab bucket, in particular motor-driven underwater grab bucket |
| CN106586823A (zh) * | 2016-12-09 | 2017-04-26 | 长沙桑铼特农业机械设备有限公司 | 一种组合式抓斗及拖拉机 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19806816B4 (de) | 2005-04-14 |
| DE59905026D1 (de) | 2003-05-22 |
| DE19806816A1 (de) | 1999-08-26 |
| US6134815A (en) | 2000-10-24 |
| EP0937675B1 (de) | 2003-04-16 |
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