EP0040387A2 - Crane - Google Patents
Crane Download PDFInfo
- Publication number
- EP0040387A2 EP0040387A2 EP81103629A EP81103629A EP0040387A2 EP 0040387 A2 EP0040387 A2 EP 0040387A2 EP 81103629 A EP81103629 A EP 81103629A EP 81103629 A EP81103629 A EP 81103629A EP 0040387 A2 EP0040387 A2 EP 0040387A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- mast
- boom
- jacket
- crane
- attached
- 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- Withdrawn
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/16—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
- B66C23/163—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements where only part of the column rotates, i.e. at least the bottom part is fixed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/16—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
- B66C23/48—Manually-movable jib cranes for use in workshops
Definitions
- the invention relates to a crane which is intended for the rapid lifting and transfer of loads, in particular for assembling and laying bulky, heavy elements on construction sites, in workshops or the like, in continuous use.
- Such devices are intended to make it easier and easier for people to constantly fiddle with loads that could lead to health damage, so that they do not have to carry them, but only have to conduct them.
- Previously known gripping constructions which are used for masonry, grip the stones on the long sides and come into the enclosure when the stones are set down on the masonry.
- the gripping structure is separated from the electrical control element, so that two men are needed to place the stone in the final position on the mortar bed.
- One man operates the "raise / lower" switching function, while the other directs and aligns the stone.
- the invention has for its object to fill a gap, namely to create an inexpensive crane that can handle loads in everyday construction site use and that fulfills the requirement to be easier to use and more flexible in use.
- the gripping structure should place the bricks on the masonry without affecting the guide line.
- the gripping construction and the operating element are combined so that the operator has both hands free to direct and set down the load.
- Achievable advantages of the new crane and grab construction are: time reduction of the work processes, personnel and cost savings in the masonry and scaffolding.
- the crane according to the invention consists of a basic arrangement which can serve both as a trolley or as a stand frame.
- the mast (fixed or variable in length) is rotatably mounted in the basic arrangement.
- a boom is attached to the top of the mast, along the longer side of which the load handler can be moved manually or by motor using a trolley.
- a balance weight and a cable pull device are attached to the shorter side of the boom.
- the boom can be swiveled endlessly, operated manually or by motor and can be locked.
- the crane according to the invention is designed so that it can easily follow the speed of the person operating it. It should relieve people in the workplace of constantly lifting components (e.g. bricks, lintels, beams, beams, mortar sacks, mixers, etc.) and handling them, so that they can only use or control the loads using the control switch Direction of installation must. This effectively saves time and labor. (Humanization of technology: machines serve people, machines follow people)
- the weight of the crane can be designed so that it can be used on bare ceilings (also for house building). It is also designed so that loads can be lifted from the ground to the respective floor or vice versa. The use of a larger crane or mobile crane is only occasionally necessary.
- the crane Since the crane is very easy to use according to the solution, it can be operated by anyone - after brief instructions.
- the crane itself is inexpensive to manufacture and easy to assemble. It has a low weight and can be dismantled in just a few steps, so that it can also be transported in a van or car trailer.
- the design of the crane opens up new dimensioning options for the components, e.g. B. in the production of bricks in much larger formats than before.
- the stones have so far been kept in sizes that a worker can just lift. This limit is broken by the newly developed crane.
- the z. Largest stones weigh about 36 kg and are bricked in by two bricklayers.
- the crane according to the invention saves the second man from bricking up large-sized stones.
- the gripping construction grips the stone from the front and sets it down in the final position on the masonry without affecting the guide line.
- the stone then lies horizontally, over the entire surface and not tilted on the mortar bed. There is no need to knock the stone in the correct position.
- the crane according to the invention consists of the following parts: a base assembly (1) consisting of mast holder and preferably 5 supporting feet (20) on which wheels (21) are mounted so that the base assembly g both as driving or as a stand can serve estell .
- the support feet can be extended as required (telescope 22). This increases the footprint and thus the moment of standing.
- Spindles (23) are attached to the ends of the extension and are cranked down until the wheels lift off the ground. This protects the crane against slipping.
- the mast (1) which can have a fixed or variable length (telescope), is rotatably mounted with the base arrangement in a holder.
- a boom (3) is attached to the top of the mast (1) and can be pivoted endlessly, manually or by motor (by remote control).
- a balance weight (5) and a cable pulling device (5) are attached to the shorter side of the boom.
- the load handler can be moved manually or by a motor using a trolley (4).
- a gripper (Fig. 5) can be fastened. on which the control element is located.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
Description
Die Erfindung betrifft einen Kran, der zum schnellen Heben und Umsetzen von Lasten, insbesondere zum Montieren und Verlegen von unhandlichen, schweren Elementen auf Baustellen, in Werkstätten oder ähnlichem, bei kontinuierlichem Einsatz bestimmt ist.The invention relates to a crane which is intended for the rapid lifting and transfer of loads, in particular for assembling and laying bulky, heavy elements on construction sites, in workshops or the like, in continuous use.
Derartige Geräte sollen dem Menschen das dauernde Hantieren _mitLasten, die für ihn zu gesundheitlichen Schäden führen könnten, ermöglichen und erleichtern, so daß er sie nicht tragen, sondern nur noch dirigieren muß.Such devices are intended to make it easier and easier for people to constantly fiddle with loads that could lead to health damage, so that they do not have to carry them, but only have to conduct them.
Die bisher bekannten Kranausführungen sind - durch ihre Konzeption bedingt - träge und engen oft den ohnehin knappen Bewegungsfreiraum auf der Baustelle ein. Sie helfen, die menschliche Kraftanstrengung zu verringern, sie brinqen aber keine wesentliche Zeitverkürzung der Arbeitsgänge und damit wenig Kostenersparnis.The previously known crane designs are - due to their design - sluggish and often restrict the already scarce freedom of movement on the construction site. They help to reduce the human effort, but they do not bring about a significant reduction in the time required for the work processes and therefore little cost savings.
Bei kleinen Hebegeräten muß man für den Transport der Last das ganze Gerät und die daran hängende Last bewegen. Große Hebegeräte (Krane und Kranführer) werden dagegen die meiste Zeit für verhältnismäßig kleine Lasten, die ein Mensch nicht mehr heben kann, in Anspruch genommen. Das Resultat ist, daß die Gesamtkosten eines Bauwerkes, z. B. bei Ein- und Mehrfamilienhäusern, unnötig in die Höhe getrieben werden, weil zu teures Gerät und Personal zum Heben von Kleinstlasten eingesetzt werden. Als Hubgerät für größere Lasten, z. B. für das Verlegen von Deckenplatten oder ähnl., kann für den gelegentlichen Bedarf viel billiger ein Autokran eingesetzt werden.In the case of small lifting devices, the entire device and the load attached to it must be moved to transport the load. Large lifting devices (cranes and crane operators), on the other hand, are used most of the time for relatively small loads that a person can no longer lift. The result is that the total cost of a building, e.g. B. in single and multi-family houses, unnecessarily driven upwards, because too expensive equipment and personnel are used to lift very small loads. As a lifting device for larger loads, e.g. B. for the laying of ceiling tiles or the like, a truck crane can be used much cheaper for occasional needs.
Bisher bekannte Greifkonstruktionen, die für das Mauern verwendet werden, greifen die Steine an den Längsseiten und kommen beim Absetzen der Steine auf dem Mauerwerk mit der Richtschnur ins Gehege. Die Greifkonstruktion ist von dem elektrischen Bedienungselement getrennt, so daß zwei Mann benötigt werden, um den Stein in endgültiger Lage auf dem Mörtelbett abzusetzen. Ein Mann bedient die Schaltfunktion "Heben/Senken", während der andere den Stein dirigiert und plan ausrichtet.Previously known gripping constructions, which are used for masonry, grip the stones on the long sides and come into the enclosure when the stones are set down on the masonry. The gripping structure is separated from the electrical control element, so that two men are needed to place the stone in the final position on the mortar bed. One man operates the "raise / lower" switching function, while the other directs and aligns the stone.
Die bisher bekannten Kran- und Greifkonstruktionen bringen somit keine wesentliche Zeitverkürzung der Arbeitsgänge und wenig Kostenersparnis.The previously known crane and grab constructions therefore do not result in a significant reduction in the time required for the operations and little cost savings.
Der Erfindung liegt die Aufgabe zugrunde, eine Lücke zu füllen, nämlich einen preisgünstigen Kran, der Lasten im Baustellenalltag bewältigt, zu schaffen und der die Forderung erfüllt, leichter in der Handhabung und flexibler im Einsatz zu sein. Beim Vermauern von Steinen soll die Greifkonstruktion die Steine ohne Beeinträchtigung der Richtschnur auf dem Mauerwerk absetzen. Die Greifkonstruktion und das Bedienungselement sind kombiniert, so daß der Bedienende beide Hände zum Dirigieren und Absetzen der Last frei hat. Erzielbare Vorteile der neuen Kran- und Greifkonstruktion sind: Zeitverkürzung der Arbeitsvorgänge, personelle und Kosteneinsparung beim Mauerwerks-und Gerüstbau.The invention has for its object to fill a gap, namely to create an inexpensive crane that can handle loads in everyday construction site use and that fulfills the requirement to be easier to use and more flexible in use. When bricking bricks, the gripping structure should place the bricks on the masonry without affecting the guide line. The gripping construction and the operating element are combined so that the operator has both hands free to direct and set down the load. Achievable advantages of the new crane and grab construction are: time reduction of the work processes, personnel and cost savings in the masonry and scaffolding.
Lösungsgemäß besteht der erfindungsgemäße Kran aus einer Basisanordnung, die sowohl als Fahr- oder auch als Standgestell dienen kann. Der Mast (fest oder variabel in der Länge) ist drehbar in der Basisanordnung gelagert. An der Spitze des Mastes ist ein Ausleger angebracht, entlang dessen längerer Seite das Lastaufnahmemittel über eine Laufkatze manuell oder motorisch bewegt werden kann. An der kürzeren Seite des Auslegers ist ein Ausgleichsgewicht und eine Seilzugeinrichtung angebracht. Der Ausleger ist rundum endlos schwenkbar, manuell oder motorisch zu betätigen und kann arretiert werden.According to the solution, the crane according to the invention consists of a basic arrangement which can serve both as a trolley or as a stand frame. The mast (fixed or variable in length) is rotatably mounted in the basic arrangement. A boom is attached to the top of the mast, along the longer side of which the load handler can be moved manually or by motor using a trolley. A balance weight and a cable pull device are attached to the shorter side of the boom. The boom can be swiveled endlessly, operated manually or by motor and can be locked.
Der erfindungsgemäße Kran ist so konzipiert, daß er der Schnelligkeit des ihn bedienenden Menschen ohne weiteres folgen kann. Er soll dem Menschen am Arbeitsplatz das dauernde Heben von Bauteilen (z. B. Mauersteinen, Fensterstürzen, Trägern, Balken, Mörtelsäcken, Mischer usw.) und das Hantieren mit denselben abnehmen, so daß er die Lasten nur noch mittels Steuerschalter zum Einsatz- oder Einbauort dirigieren muß. Dadurch wird effektiv Zeit- und Arbeitskraft eingespart. (Humanisierung der Technik: Maschine dient dem Menschen, Maschine folgt dem Menschen) Der Kran kann vom Gewicht her so ausgelegt werden, daß er auf Rohdecken (auch für den Wohnungsbau) einsetzbar ist. Ferner ist er so konzipiert, daß man auch Lasten vom Erdboden auf das jeweilige Geschoß oder umgekehrt heben kann. Der Einsatz eines größeren Kranes oder Autokranes ist nur noch gelegentlich erforderlich. Da der Kran lösungsgemäß sehr einfach in der Handhabung ist, kann er von jedem - nach kurzer Anleitung - bedient werden. Außerdem ist der Kran selbst preisgünstig herzustellen und einfach montierbar. Er hat ein geringes Eigengewicht und ist mit wenigen Handgriffen zerlegbar, so daß er auch in einem Kleintransporter oder Pkw-Anhänger transportiert werden kann.The crane according to the invention is designed so that it can easily follow the speed of the person operating it. It should relieve people in the workplace of constantly lifting components (e.g. bricks, lintels, beams, beams, mortar sacks, mixers, etc.) and handling them, so that they can only use or control the loads using the control switch Direction of installation must. This effectively saves time and labor. (Humanization of technology: machines serve people, machines follow people) The weight of the crane can be designed so that it can be used on bare ceilings (also for house building). It is also designed so that loads can be lifted from the ground to the respective floor or vice versa. The use of a larger crane or mobile crane is only occasionally necessary. Since the crane is very easy to use according to the solution, it can be operated by anyone - after brief instructions. In addition, the crane itself is inexpensive to manufacture and easy to assemble. It has a low weight and can be dismantled in just a few steps, so that it can also be transported in a van or car trailer.
Durch die Konzeption des Kranes eröffnen sich neue Dimensionierungsmöglichkeiten der Bauteile, z. B. bei der Herstellung von Mauersteinen in weitaus größeren Formaten als bisher. Die Steine wurden bis jetzt in Größen gehalten, die ein Arbeiter gerade noch heben kann. Diese Grenze wird durch den neu entwickelten Kran gesprengt. Die z. Z. größten Steine haben ein Gewicht von ca. 36 kg und werden von zwei Maurern eingemauert. Durch den erfindungsgemäßen Kran wird der zweite Mann beim Vermauern großformatiger Steine eingespart. Die Greifkonstruktion greift den Stein von der Stirnseite und setzt ihn ohne Beeinträchtigung der Richtschnur in endgültiger Lage auf dem Mauerwerk ab. Der Stein liegt dann waagerecht, vollflächig und nicht verkantet auf dem Mörtelbett. Das Klopfen des. Steines in die richtige Lage entfällt völlig.The design of the crane opens up new dimensioning options for the components, e.g. B. in the production of bricks in much larger formats than before. The stones have so far been kept in sizes that a worker can just lift. This limit is broken by the newly developed crane. The z. Largest stones weigh about 36 kg and are bricked in by two bricklayers. The crane according to the invention saves the second man from bricking up large-sized stones. The gripping construction grips the stone from the front and sets it down in the final position on the masonry without affecting the guide line. The stone then lies horizontally, over the entire surface and not tilted on the mortar bed. There is no need to knock the stone in the correct position.
Wenn der Kran im Mauerwerksbau verwendet wird, kann vom Boden weg fast bis 'zur Augenhöhe gemauert werden. Danach wird nur einmal ein Gerüst/Arbeitsbühne aufgestellt und mit Hilfe des Kranes bis zur Decke (Augenhöhe) gemauert. Die Größe oder das Gewicht der Steine spielen bei diesem Mauerverfahren-keine Rolle. Im Schwenkbereich des Kranes können die Wände in mehrere Richtungen gemauert werden. Ein Gerüstbau an den Außenwänden ist nicht mehr erforderlich.When the crane is used for masonry, away from the ground almost up 'can be emauert g to eye level. Thereafter, a scaffold / work platform is once set up and bricked using the crane to the ceiling (Au g enhöhe). The size or weight of the stones play in this wall process - none Role. In the slewing range of the crane, the walls can be bricked in several directions. Scaffolding on the outer walls is no longer necessary.
In den Zeichnungen ist ein Ausführungsbeispiel der Erfindung wie folgt dargestellt:
- Fig. 1: Seitenansicht des erfindungsgemäßen Krans
- Fig. 2: Draufsicht der Basisanordnung
- Fig. 3: Schnittzeichnung der Masthalterung
- Fig. 4: Schnittzeichnung der Auslegerhalterung
- Fig. 5: Abb. des Greifers
- Fi g . 1: side view of the crane according to the invention
- Fig. 2: top view of the base assembly
- Fig. 3: Sectional drawing of the mast bracket
- Fig. 4: Sectional view of the interpretation g preserver Terung
- Fig. 5: Fig. Of the gripper
Der erfindungsgemäße Kran besteht aus folgenden Teilen: Einer Basisanordnung (1) , bestehend aus Masthalterung und vorzugsweise 5 Stützfüßen (20), an denen Räder (21) angebracht sind, so daß die Basisanordnung sowohl als Fahr-oder auch als Standgestell dienen kann. Die Stützfüße können nach Bedarf verlängert werden (Teleskop 22). Dadurch wird die Standfläche vergrößert und damit das Standmoment. An den Enden der Verlängerung sind Spindeln (23) angebracht, die soweit heruntergekurbelt werden, bis die Räder vom Boden abheben. Damit wird der Kran gegen Verrutschung abgesichert. Der Mast (1) , der eine feste oder veränderliche Länge (Teleskop) haben kann, ist mit der Basisanordnung in einer Halterung drehbar gelagert. An der Spitze des Mastes (1) ist ein Ausleger (3) angebracht, der rundum endlos schwenkbar, manuell oder motorisch (per Fernbedienung) zu betätigen ist. Ferner kann er mittels.einer Spindel arretiert werden. An der kürzeren Seite des Auslegers ist ein Ausgleichsgewicht (5) und eine Seilzugeinrichtung (5) angebracht. Entlang der längeren Seite des Auslegers kann das Lastaufnahmemittel über eine Laufkatze (4) manuell oder motorisch bewept werden. Am Lastaufnahmemittel kann z. B. ein Greifer (Fia. 5) befestiat werden. an dem sich das Bedienunaselement befindet.The crane according to the invention consists of the following parts: a base assembly (1) consisting of mast holder and preferably 5 supporting feet (20) on which wheels (21) are mounted so that the base assembly g both as driving or as a stand can serve estell . The support feet can be extended as required (telescope 22). This increases the footprint and thus the moment of standing. Spindles (23) are attached to the ends of the extension and are cranked down until the wheels lift off the ground. This protects the crane against slipping. The mast (1), which can have a fixed or variable length (telescope), is rotatably mounted with the base arrangement in a holder. A boom (3) is attached to the top of the mast (1) and can be pivoted endlessly, manually or by motor (by remote control). It can also be locked using a spindle. A balance weight (5) and a cable pulling device (5) are attached to the shorter side of the boom. Along the longer side of the jib, the load handler can be moved manually or by a motor using a trolley (4). On the load suspension device, for. B. a gripper (Fig. 5) can be fastened. on which the control element is located.
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3019196 | 1980-05-16 | ||
DE3019196 | 1980-05-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0040387A2 true EP0040387A2 (en) | 1981-11-25 |
EP0040387A3 EP0040387A3 (en) | 1982-03-31 |
Family
ID=6102846
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81103629A Withdrawn EP0040387A3 (en) | 1980-05-16 | 1981-05-12 | Crane |
Country Status (1)
Country | Link |
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EP (1) | EP0040387A3 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2512795A1 (en) * | 1981-09-11 | 1983-03-18 | Mauer Blitz Bau Service Gmbh | LIGHT CRANE FOR LAYERED MASONRY, IN PARTICULAR IN LARGE-FORMED MOELLONS OR STONES |
CN102786005A (en) * | 2012-08-24 | 2012-11-21 | 安徽理工大学 | Combined winding lifting steering device |
CN103922249A (en) * | 2013-01-14 | 2014-07-16 | 国家电网公司 | Hanger |
CN104016226A (en) * | 2014-06-17 | 2014-09-03 | 新兴铸管股份有限公司 | Roller ring transportation tool |
CN104891354A (en) * | 2015-07-03 | 2015-09-09 | 杨海良 | Crane with balance adjustment device |
CN105923550A (en) * | 2016-06-29 | 2016-09-07 | 中国石油化工股份有限公司 | Lifting device for gas extraction tree or oil extraction tree |
CN105923532A (en) * | 2016-07-07 | 2016-09-07 | 安庆宜源石油机械配件制造有限责任公司 | Oil pipe hoisting device |
CN106144910A (en) * | 2015-03-26 | 2016-11-23 | 中际联合(北京)科技股份有限公司 | A kind of marine loop wheel machine |
CN107140560A (en) * | 2017-06-15 | 2017-09-08 | 无锡集安自动化科技有限公司 | A kind of new convenient type building construction hoisting machine |
CN108083138A (en) * | 2017-12-08 | 2018-05-29 | 北京卫星环境工程研究所 | The general unloading stent of hung antenna |
CN109292640A (en) * | 2018-10-16 | 2019-02-01 | 中国葛洲坝集团第工程有限公司 | A kind of side slope protection prefabricated section semi-automation mounting device and construction method |
CN111362151A (en) * | 2020-04-01 | 2020-07-03 | 南京宝驰金属设备有限公司 | Chlorine washing tower installation is with lifting by crane mechanism |
CN111747330A (en) * | 2020-06-15 | 2020-10-09 | 武汉理工大学 | Cantilever crane |
CN112027936A (en) * | 2020-08-27 | 2020-12-04 | 崔维华 | Hoist for high-speed rail prefabricated box girder construction |
CN113772566A (en) * | 2021-11-15 | 2021-12-10 | 山东柏远复合材料科技股份有限公司 | Mechanical equipment for ship lifting |
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1981
- 1981-05-12 EP EP81103629A patent/EP0040387A3/en not_active Withdrawn
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DE7436265U (en) * | 1975-03-06 | Vetter A Kg | Pillar slewing crane | |
FR1007777A (en) * | 1948-03-30 | 1952-05-09 | Building construction installation | |
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FR1408794A (en) * | 1964-07-06 | 1965-08-20 | Swivel jib crane | |
US3358849A (en) * | 1966-02-02 | 1967-12-19 | Parks Cramer Co | Jib crane |
CH462421A (en) * | 1966-06-21 | 1968-09-15 | Halter Roger | Process for the erection of a partition in prefabricated elements and installation for its implementation |
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