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EP0090746A1 - Magnetic device, particularly for handling - Google Patents

Magnetic device, particularly for handling Download PDF

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Publication number
EP0090746A1
EP0090746A1 EP83420038A EP83420038A EP0090746A1 EP 0090746 A1 EP0090746 A1 EP 0090746A1 EP 83420038 A EP83420038 A EP 83420038A EP 83420038 A EP83420038 A EP 83420038A EP 0090746 A1 EP0090746 A1 EP 0090746A1
Authority
EP
European Patent Office
Prior art keywords
stator
rotor
magnetic
carrier
air gap
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
Application number
EP83420038A
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German (de)
French (fr)
Other versions
EP0090746B1 (en
Inventor
Philibert Maurice Braillon
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.)
Braillon et Cie SA
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Braillon et Cie SA
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Filing date
Publication date
Application filed by Braillon et Cie SA filed Critical Braillon et Cie SA
Priority to AT83420038T priority Critical patent/ATE20660T1/en
Publication of EP0090746A1 publication Critical patent/EP0090746A1/en
Application granted granted Critical
Publication of EP0090746B1 publication Critical patent/EP0090746B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0231—Magnetic circuits with PM for power or force generation
    • H01F7/0252—PM holding devices
    • H01F7/0257—Lifting, pick-up magnetic objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/04—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by magnetic means

Definitions

  • the subject of the invention is a magnetic device, the applications of which can be multiple, but the arrangement and characteristics of which make it more particularly intended for handling loads.
  • FIG. 1 These two positions are represented the first by FIG. 1 and the second by FIG. 2, in which (A1) and (A2) denote the magnets of the stator and of the rotor respectively and in which the lines of force of the magnetic field are visible.
  • the invention aims to simplify the manufacture of this type of magnetic device. It relates to an assembly whose rotor has a magnetic mass greater than that of the stator and whose rotor is positioned in the stator with a clearance allowing the formation of an air gap compensating for the imbalance between the magnetic masses of the stator and the rotor.
  • Figure 3 is a principle view
  • Figures 4, 5 and 6 are views in longitudinal section, in cross section and partial in elevation.
  • FIG. 3 The principle serving as a basis for the arrangement and operation of this magnetic carrier is illustrated in FIG. 3.
  • the stator and the rotor of the carrier are designated respectively by (1) and by (2).
  • the stator (1) consists of a cage comprising two pole pieces (3), two magnets (4) and a pole closure plate (5).
  • the rotor (2) consists of a magnet (6) and two pole pieces (7); it is movable in rotation about an axis (X).
  • the correct functioning of the magnetic carrier therefore only requires determining the magnetic masses of the magnets of the stator and of the rotor as a function of the air gap resulting from the clearance voluntarily left between them; and thanks to this game it is possible to manufacture the carrier without requiring expensive machining of its stator and its rotor.
  • Figures 4 and 5 show an embodiment of such a magnetic carrier. It comprises a cage delimited by two lateral ferromagnetic plates (8), by two non-magnetic flanges (9), by a non-magnetic base (10) and by three ferromagnetic plates (12) of which the two lower ones are isolated from one another and between which are positioned three magnets (13).
  • a ring (14) is attached to this cage for suspending the carrier from a lifting member, and a handle (15) for moving it when it is suspended.
  • This cage constitutes the stator inside which is housed the rotor which can occupy two positions corresponding respectively to the stop and the walk.
  • This rotor which revolves in the flanges (9) of the stator is constituted by magnets (16) and pole plates (17).
  • a handle (18) allows it to be rotated to move the carrier from the "off” position to the "on” position and vice versa; and a finger (19) allows it to be locked in the "on” position.
  • the invention is not limited to the only embodiment of this magnetic carrier which has been described above by way of example, on the contrary it embraces all the variant embodiments within the framework of the claims below, regardless in particular of the type of magnets used and the arrangement of these magnets in the stator.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Jigs For Machine Tools (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Soft Magnetic Materials (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

A magnetic holder has a permanent magnet stator and a permanent magnet rotor, the magnetic mass of the latter being greater than that of the form and a play defining an air gap being provided between them so that the losses in the air gap compensate for the magnetic mass by which the rotor permanent magnet exceeds the stator permanent magnet.

Description

L'invention a pour objet un appareil magnétique dont les applications peuvent être multiples, mais dont l'agencement et les caractéristiques le destinent plus particulièrement à la manutention de charges.The subject of the invention is a magnetic device, the applications of which can be multiple, but the arrangement and characteristics of which make it more particularly intended for handling loads.

C'est donc dans le cas particulier de cette application en porteur magnétique, c'est-à-dire en appareil de levage que l'invention sera ci-après décrite, sans qu'il en résulte cependant une limitation de son étendue.It is therefore in the particular case of this application in magnetic carrier, that is to say in lifting device that the invention will be described below, without however resulting in a limitation of its scope.

Les appareils porteurs magnétiques comportent deux éléments essentiels : un stator et un rotor ; et considérant un porteur tel que celui illustré schématiquement par les figures 1 et 2 du dessin annexé, c'est-à-dire un plateau équipé d'aimants permanents à grande force coercitive, par exemple d'aimants en ferrite, le stator (1) et le rotor (2) possèdent des masses magnétiques égales afin qu'en faisant tourner le rotor de 180° il soit possible soit d'annuler les effets d'un champ magnétique créé par la masse magnétique du stator en la mettant en série et dans le même sens qu'un autre champ créé par la masse magnétique équivalente du rotor, soit d'additionner les effets des deux champs. Si M est la masse magnétique d'une part du stator et d'autre part du rotor, le fonctionnement du porteur peut être ainsi schématisé :

  • - position arrêt :
    Figure imgb0001
  • - position marche :
    Figure imgb0002
Magnetic carriers have two essential components: a stator and a rotor; and considering a carrier such as that illustrated diagrammatically by FIGS. 1 and 2 of the appended drawing, that is to say a plate equipped with permanent magnets with great coercive force, for example ferrite magnets, the stator (1 ) and the rotor (2) have equal magnetic masses so that by rotating the rotor 180 ° it is possible either to cancel the effects of a magnetic field created by the magnetic mass of the stator by putting it in series and in the same sense as another field created by the equivalent magnetic mass of the rotor, is to add the effects of the two fields. If M is the magnetic mass on the one hand of the stator and on the other hand of the rotor, the operation of the carrier can be schematized as follows:
  • - off position:
    Figure imgb0001
  • - on position:
    Figure imgb0002

Ces deux positions sont représentées la première par la figure 1 et la seconde par la figure 2, dans lesquelles (A1) et (A2) désignent les aimants respectivement du stator et du rotor et dans lesquelles sont visibles les lignes de force du champ magnétique.These two positions are represented the first by FIG. 1 and the second by FIG. 2, in which (A1) and (A2) denote the magnets of the stator and of the rotor respectively and in which the lines of force of the magnetic field are visible.

Divers aménagements sont possibles pour la mise en oeuvre de ce principe, notamment en ce qui concerne la position du ou des aimants faisant partie du stator. Quelle que soit la solution adoptée, le bon fonctionnement de ce type de porteurs est toutefois subordonné sinon à l'absence, du moins à une réduction maximale de l'entrefer entre le stator et le rotor, afin d'éliminer les pertes magnétiques et de permettre ainsi la suppression de tout champ à l'extérieur du porteur en position d'arrêt.Various arrangements are possible for the implementation of this principle, in particular as regards the position of the magnet or magnets forming part of the stator. Whatever solution is adopted, proper functioning of this type of carrier is however subject, if not to the absence, at least to a maximum reduction of the air gap between the stator and the rotor, in order to eliminate the magnetic losses and thus allow the suppression of any field at outside of carrier in stop position.

Cette condition impérative nécessite que le rotor soit parfaitement ajusté dans le stator ; cela exige un usinage précis de ces deux organes et conduit à un coût élevé.This imperative condition requires that the rotor be perfectly adjusted in the stator; this requires precise machining of these two members and leads to a high cost.

L'invention vise à simplifier la fabrication de ce type d'appareils magnétiques. Elle a pour objet un ensemble dont le rotor possède une masse magnétique supérieure à celle du stator et dont le rotor est positionné dans le stator avec un jeu permettant la formation d'un entrefer compensant le déséquilibre entre les masses magnétiques du stator et du rotor.The invention aims to simplify the manufacture of this type of magnetic device. It relates to an assembly whose rotor has a magnetic mass greater than that of the stator and whose rotor is positioned in the stator with a clearance allowing the formation of an air gap compensating for the imbalance between the magnetic masses of the stator and the rotor.

Si M désigne la masse magnétique du stator, si M1 désigne la masse magnétique du rotor, M1 étant supérieur à M, et si P désigne les pertes résultant de l'entrefer créé par le montage du rotor avec jeu dans le stator et si P est égal à la différence entre M1 et M, le fonctionnement d'un appareil magnétique conforme à l'invention se traduit comme suit :

  • - position arrêt
  • Figure imgb0003
    - position marche
    Figure imgb0004
If M denotes the magnetic mass of the stator, if M1 denotes the magnetic mass of the rotor, M1 being greater than M, and if P denotes the losses resulting from the air gap created by the mounting of the rotor with clearance in the stator and if P is equal to the difference between M1 and M, the operation of a magnetic device according to the invention is expressed as follows:
  • - off position
  • Figure imgb0003
     - on position
    Figure imgb0004

L'invention sera bien comprise d'ailleurs à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple non limitatif, une forme d'exécution de cet appareil magnétique dans le cas d'un porteur :The invention will be understood moreover with the aid of the description which follows, with reference to the appended schematic drawing representing, by way of nonlimiting example, an embodiment of this magnetic device in the case of a carrier :

Figure 3 en est une vue de principeFigure 3 is a principle view

Figures.4, 5 et 6 en sont des vues en coupe longitudinale, en coupe transversale et partielle en élévation.Figures 4, 5 and 6 are views in longitudinal section, in cross section and partial in elevation.

Le principe servant de base à l'agencement et au fonctionnement de ce porteur magnétique est illustré par la figure 3.The principle serving as a basis for the arrangement and operation of this magnetic carrier is illustrated in FIG. 3.

Le stator et le rotor du porteur sont désignés respectivement par (1) et par (2). Le stator (1) est constitué par une cage comprenant deux pièces polaires (3), deux aimants (4) et une plaque polaire de fermeture (5). Le rotor (2) est constitué par un aimant (6) et deux pièces polaires (7) ; il est mobile en rotation autour d'un axe (X).The stator and the rotor of the carrier are designated respectively by (1) and by (2). The stator (1) consists of a cage comprising two pole pieces (3), two magnets (4) and a pole closure plate (5). The rotor (2) consists of a magnet (6) and two pole pieces (7); it is movable in rotation about an axis (X).

Comme le montre la figure 3, les faces intérieures des deux pièces polaires (3) du stator sont planes, et il existe entre elles et les pièces polaires (7) du rotor un jeu (A-B) suffisant pour permettre la rotation de celui- ci. Ce jeu donne lieu à la formation d'un entrefer conduisant à des pertes magnétiques.As shown in Figure 3, the inner faces of the two pole pieces (3) of the stator are flat, and there is between them and the pole pieces (7) of the rotor a clearance (AB) sufficient to allow rotation of the latter . This play gives rise to the formation of an air gap leading to magnetic losses.

Ces pertes sont compensées par un déséquilibre volontairement donné aux masses magnétiques des aimants (4) du stator par rapport à celle (6) du rotor. Comme il ressort de la figure 3, la masse de l'aimant (6) du rotor est très supérieure à celle totale des deux aimants (4) du stator.These losses are compensated for by an imbalance voluntarily given to the magnetic masses of the magnets (4) of the stator with respect to that (6) of the rotor. As can be seen in FIG. 3, the mass of the magnet (6) of the rotor is much greater than that of the two magnets (4) of the stator.

Le bon fonctionnement du porteur magnétique nécessite donc seulement de déterminer les masses magnétiques des aimants du stator et du rotor en fonction de l'entrefer résultant du jeu laissé volontairement entre eux ; et grâce à ce jeu il est possible de fabriquer le porteur sans nécessiter un usinage onéreux de son stator et de son rotor.The correct functioning of the magnetic carrier therefore only requires determining the magnetic masses of the magnets of the stator and of the rotor as a function of the air gap resulting from the clearance voluntarily left between them; and thanks to this game it is possible to manufacture the carrier without requiring expensive machining of its stator and its rotor.

Les figures 4 et 5 représentent une forme d'exécution d'un tel porteur magnétique. Il comprend une cage délimitée par deux plaques ferromagnétiques latérales (8), par deux flasques amagnétiques (9), par une semelle amagnétique (10) et par trois plaques ferromagnétiques (12) dont les deux inférieures sont isolées l'une de l'autre et entre lesquelles sont positionnés trois aimants (13). De cette cage sont solidaires un anneau (14) permettant de suspendre le porteur à un organe de levage, et une poignée (15) permettant de le déplacer lorsqu'il est suspendu.Figures 4 and 5 show an embodiment of such a magnetic carrier. It comprises a cage delimited by two lateral ferromagnetic plates (8), by two non-magnetic flanges (9), by a non-magnetic base (10) and by three ferromagnetic plates (12) of which the two lower ones are isolated from one another and between which are positioned three magnets (13). A ring (14) is attached to this cage for suspending the carrier from a lifting member, and a handle (15) for moving it when it is suspended.

Cette cage constitue le stator à l'intérieur duquel est logé le rotor qui peut occuper deux positions correspondant respectivement à l'arrêt et à la marche. Ce rotor qui tourillonne dans les flasques (9) du stator est constitué par des aimants (16) et des plaques polaires (17). Une manette (18) permet de le faire tourner pour faire passer le porteur de la position "arrêt" à la position "marche" et vice-versa ; et un doigt (19) permet de la verrouiller en position "marche".This cage constitutes the stator inside which is housed the rotor which can occupy two positions corresponding respectively to the stop and the walk. This rotor which revolves in the flanges (9) of the stator is constituted by magnets (16) and pole plates (17). A handle (18) allows it to be rotated to move the carrier from the "off" position to the "on" position and vice versa; and a finger (19) allows it to be locked in the "on" position.

Comme il va de soi, l'invention ne se limite pas à la seule forme d'exécution de ce porteur magnétique qui a été ci-dessus décrite à titre d'exemple, elle en embrasse au contraire toutes les variantes de réalisation dans le cadre des revendications ci-après, quels que soient notamment le type d'aimants utilisés et la disposition de ces aimants dans le stator.As it goes without saying, the invention is not limited to the only embodiment of this magnetic carrier which has been described above by way of example, on the contrary it embraces all the variant embodiments within the framework of the claims below, regardless in particular of the type of magnets used and the arrangement of these magnets in the stator.

Claims (2)

1. Appareil magnétique, notamment porteur magnétique, du type de ceux comportant un stator (1) et un rotor (2), caractérisé en ce que le rotor (2) possède une masse magnétique (6,16) supérieure à celle (4,13) du stator (1) et est positionné dans le stator avec un jeu constituant un entrefer (A-B) générateur de pertes compensant le déséquilibre entre les masses magnétiques du stator (1) et du rotor (2).1. Magnetic device, in particular magnetic carrier, of the type of those comprising a stator (1) and a rotor (2), characterized in that the rotor (2) has a magnetic mass (6.16) greater than that (4, 13) of the stator (1) and is positioned in the stator with a clearance constituting an air gap (AB) generating losses compensating for the imbalance between the magnetic masses of the stator (1) and the rotor (2). 2. Appareil magnétique selon la revendication 1, caractérisé en ce que M désignant la masse magnétique de son stator (1), M1 désignant la masse magnétique de son rotor (2), M1 est supérieur à M et entre le stator (1) et le rotor (2) est laissé un jeu ou entrefer entraînant des pertes telles que : - en position arrêt
Figure imgb0005
- et en position marche
Figure imgb0006
 2. Magnetic device according to claim 1, characterized in that M designating the magnetic mass of its stator (1), M1 designating the magnetic mass of its rotor (2), M1 is greater than M and between the stator (1) and the rotor (2) is left with a clearance or air gap causing losses such as: - in stop position
Figure imgb0005
 - and in the on position
Figure imgb0006
EP83420038A 1982-03-25 1983-03-09 Magnetic device, particularly for handling Expired EP0090746B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83420038T ATE20660T1 (en) 1982-03-25 1983-03-09 MAGNETIC DEVICE, ESPECIALLY FOR LOADING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8205681A FR2523940A1 (en) 1982-03-25 1982-03-25 MAGNETIC APPARATUS, IN PARTICULAR FOR HANDLING
FR8205681 1982-03-25

Publications (2)

Publication Number Publication Date
EP0090746A1 true EP0090746A1 (en) 1983-10-05
EP0090746B1 EP0090746B1 (en) 1986-07-09

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Family Applications (1)

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EP83420038A Expired EP0090746B1 (en) 1982-03-25 1983-03-09 Magnetic device, particularly for handling

Country Status (7)

Country Link
US (1) US4465993A (en)
EP (1) EP0090746B1 (en)
JP (1) JPS58175808A (en)
AT (1) ATE20660T1 (en)
DE (1) DE3364406D1 (en)
ES (1) ES8401910A1 (en)
FR (1) FR2523940A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5166654A (en) * 1991-04-10 1992-11-24 Braillon Magnetique, Societe Anonyme Permanent-magnet grab

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* Cited by examiner, † Cited by third party
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US4921292A (en) * 1988-09-23 1990-05-01 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Magnetic attachment mechanism
DE4102102C2 (en) * 1991-01-25 1995-09-07 Leybold Ag Magnet arrangement with at least two permanent magnets and their use
FR2706881B1 (en) * 1993-06-24 1995-07-28 Braillon Magnetique Sa
KR100288245B1 (en) * 1998-07-24 2001-05-02 정형 Automatic magnetism switchgear of magnetic adsorber
AUPQ446699A0 (en) 1999-12-06 2000-01-06 Kocijan, Franz Switchable (variable) permanent magnet device
DE20015391U1 (en) * 2000-09-06 2002-01-17 MV Marketing und Vertriebs-GmbH & Co. KG Wieländer + Schill, 78054 Villingen-Schwenningen Bracket device in particular for fixing and / or loosening attachments
ITMI20011394A1 (en) * 2001-06-29 2002-12-29 Claudio Vicentelli MAFNETIC ANCHORAGE MODULE WITH ACTIVATION / DEACTIVATION SYSTEM AND REGULATION OF THE MAGNETIC FORCE OF ANCHOR AND RELATED ASSEMBLIES
GB0302001D0 (en) * 2003-01-29 2003-02-26 Neil Holdings Ltd James Magnetic anchoring means
US8757689B2 (en) * 2010-02-12 2014-06-24 Soph Magnetics (Shanghai) Co., Ltd. Permanent magnetic lifting device
US8183965B2 (en) 2010-04-09 2012-05-22 Creative Engineering Solutions, Inc. Switchable core element-based permanent magnet apparatus
CN205218121U (en) 2013-04-19 2016-05-11 米沃奇电动工具公司 Magnetic force drilling machine
US9078510B2 (en) * 2014-09-04 2015-07-14 Yu-Wen LIAO Easily taken and carried holder for boots
CN106586801B (en) * 2016-11-03 2018-08-14 上海电气电站设备有限公司 A kind of inner stator hoisting and overturning structure
US11097401B2 (en) 2017-04-27 2021-08-24 Magswitch Technology Worldwide Pty Ltd. Magnetic coupling device with at least one of a sensor arrangement and a degauss capability
US10903030B2 (en) 2017-04-27 2021-01-26 Magswitch Technology Worldwide Pty Ltd. Variable field magnetic couplers and methods for engaging a ferromagnetic workpiece
US12023770B2 (en) 2017-04-27 2024-07-02 Magswitch Technology, Inc. Magnetic coupling device with at least one of a sensor arrangement and a degauss capability
JP7303753B2 (en) 2017-06-08 2023-07-05 マグスウィッチ テクノロジー ワールドワイド プロプライエタリー リミテッド Electromagnetic Switchable Permanent Magnetic Device
IT201800006207A1 (en) * 2018-06-11 2019-12-11 Magnetic module with anchoring surfaces that can be activated and deactivated magnetically

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3452310A (en) * 1966-11-14 1969-06-24 Eriez Mfg Co Turn-off permanent magnet
GB1471025A (en) * 1974-05-10 1977-04-21 Inst Manipulacnich Dopravnich Magnetic apparatus for suspension and handling of ferro magnetic materials
DE2704118A1 (en) * 1976-04-29 1977-11-10 Walker Hagou Bv Permanent hoisting magnet with parallel pole shoes - has armature which can be manually rotated from neutral to working position (NL 1.11.77)
FR2441577A1 (en) * 1978-11-17 1980-06-13 Cardone Tecnomagnetica MANUAL CONTROL MAGNETIC ELEVATOR

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184654A (en) * 1962-06-14 1965-05-18 Ahmet K Bey Magnetic holding device
DE2517364A1 (en) * 1975-04-19 1976-10-28 Max Baermann SWITCHABLE, PERMANENT MAGNETIC HOLDING DEVICE
US4122922A (en) * 1977-08-17 1978-10-31 Max Baermann Infinitely variable wear-free eddy current and/or hysteresis brake, preferably for track-bound vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3452310A (en) * 1966-11-14 1969-06-24 Eriez Mfg Co Turn-off permanent magnet
GB1471025A (en) * 1974-05-10 1977-04-21 Inst Manipulacnich Dopravnich Magnetic apparatus for suspension and handling of ferro magnetic materials
DE2704118A1 (en) * 1976-04-29 1977-11-10 Walker Hagou Bv Permanent hoisting magnet with parallel pole shoes - has armature which can be manually rotated from neutral to working position (NL 1.11.77)
FR2441577A1 (en) * 1978-11-17 1980-06-13 Cardone Tecnomagnetica MANUAL CONTROL MAGNETIC ELEVATOR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5166654A (en) * 1991-04-10 1992-11-24 Braillon Magnetique, Societe Anonyme Permanent-magnet grab

Also Published As

Publication number Publication date
EP0090746B1 (en) 1986-07-09
FR2523940A1 (en) 1983-09-30
FR2523940B1 (en) 1984-06-29
DE3364406D1 (en) 1986-08-14
ES520946A0 (en) 1984-01-16
ATE20660T1 (en) 1986-07-15
JPS58175808A (en) 1983-10-15
ES8401910A1 (en) 1984-01-16
US4465993A (en) 1984-08-14

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