WO1987004850A1 - Multi-chamber magnetic distributing valve - Google Patents

Multi-chamber magnetic distributing valve Download PDF

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Publication number
WO1987004850A1
WO1987004850A1 PCT/CH1987/000011 CH8700011W WO8704850A1 WO 1987004850 A1 WO1987004850 A1 WO 1987004850A1 CH 8700011 W CH8700011 W CH 8700011W WO 8704850 A1 WO8704850 A1 WO 8704850A1
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WO
WIPO (PCT)
Prior art keywords
armature
tube
valve according
directional control
control valve
Prior art date
Application number
PCT/CH1987/000011
Other languages
German (de)
French (fr)
Inventor
Jakob Rothenberger
Original Assignee
Jakob Rothenberger
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jakob Rothenberger filed Critical Jakob Rothenberger
Publication of WO1987004850A1 publication Critical patent/WO1987004850A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding

Definitions

  • Figure 1 shows a longitudinal section through the multi-chamber directional valve with the valve body 1, therein recessed pressure chamber 2 acted upon by the pump of the hydraulic system, via the control piston 6 connected to the consumer chamber 4 and the consumer chamber 3 connected to the return chambers 5 via control piston, and a magnet system screwed to the valve body 1 in a pressure-tight manner.
  • the axially movable control piston 5 is reduced in weight and length in comparison with the conventional designs in such a way that forces are saved for its displacement and the return chamber 5 are freed from oil swirling baffles, dynamic pressure surges and high flow resistances.
  • a conical spring 7 with a strongly progressively increasing characteristic curve is installed. It sits with the ground turn on the central piston end pin 10 and in the recess 8 of the pressure-tight screwed plug 9.
  • the recess 8 also serves to increase the spring tension and thus its shutdown force and the performance of the valve.
  • Both of the approximately ellipsoidal shaped areas of the anchor tube cutout and the magnet are such that when the magnet armature 14 falls off the anchor counterpart 19, the anchor apex 13 strikes the anchor tube bottom 11 with oil pressure damping and the displacement of oil from the curved and cylindrical space 23 - thanks to the groove-free and hole-free surfaces of the tube and anchor, the oil space narrowing to the crown of the anchor, the circular section spaces 23, which are generously proportioned to the amount of oil, all around the cylindrical anchor part and not least as a result the precise anchor guidance through the six ground guide edges 22 - without oil swirling and backflow occurs quickly and smoothly. Oies has a positive effect on a smooth and clean shift, shorter shift times and less effort. Design and manufacture of anchor pipe, anchor and anchor counterpart are simplified and cheaper compared to previous designs.
  • the pole closing surfaces 18 of the armature and armature counterpart are flat, and in order to prevent the risk of so-called "welding" of both surfaces, that of the armature counterpart is advantageously provided with a diagonally running groove.
  • the air gap between the two pole faces is relatively small in short-stroke high-speed runners and is generally between 10 and 30 mm.
  • the switching pin 15 must also be guided in a centrically clean manner and still ensure sufficient oil passage through the switching pin bore, ie that this switching pin is also expediently made from a prismatic rod.
  • the pole disks 31 and 32 can be exchanged for this purpose or replaced by new ones.
  • the copper winding 29 is applied to a plastic coil carrier 24 with lateral flanges and the armature tube connected to the armature counterpart is inserted into its axial round opening.
  • the round coil 24 can be rotated a full 360 degrees on the anchor tube 12.
  • the coil is held by a nut 33.
  • the axial round opening of the coil carrier 24 has recesses on both sides that extend over the entire circumference and are axially separated from one another for receiving magnetic field-strengthening tubular rivets 25, the flanges of which end on the outside on the pole disks 31 and 32 lie tight.
  • a ring-shaped injection molded plastic bead 27 is used for further sealing between pole disks 31 and 32.
  • Recesses 26 on the outer circumference of the plastic flanges allow the passage of cold-curing casting resin from the jacket space 28 into the intermediate spaces 34.

Abstract

This distributing valve has a compression chamber (2), operating chambers (3 and 4) and return chambers (5). The distributing piston (6), depending on its position, connects the compression chamber (2) with one of the operating chambers (3+4) and the other operating chamber with the return chambers (5). The distributing piston (6) is connected to an operating rod (15) of the armature (14) of a DC electromagnetic system located in a pressure-resistant enclosure. The armature (14), guided virtually without friction, is located in an armature tube (12), whose end, facing away from the distributing piston has the shape of an ellipsoid. The end of the armature is shaped at its corresponding end in the form of the inner space of the armature tube; in this way the top (13) of the armature rests on the bottom (11) of the armature tube when the magnetic system is not excited, and during excitation of the latter, the level surface of the armature (14) presses against the flat surface of an opposed element (19) of the armature. The return of the distributing piston (6) to the ''off'' position is effected by the pressure spring (7).

Description

Magnetisch betätigtes Mehrkammer - WegeventilMagnetically operated multi-chamber directional valve
Bekannt. sind Mehrkammer - Wegeventile mit stossenden und druckdichten Gleichstrommagneten, mit aussen und innen zylindrischen, aus verschiedenen Metallen zusammengesetzten Ankerrαhren und darin beweglichen, mit Oruckausgleichsnuten und Bohrungen versehenen Rundankern, wobei der Arbeitsluftspalt mit dem Kolbenweg nicht identisch ist.Known. are multi-chamber directional valves with shock-absorbing and pressure-tight direct current magnets, with outside and inside cylindrical armature tubes composed of different metals and movable round anchors with pressure compensation grooves and bores, whereby the working air gap is not identical to the piston path.
Innen gekrümmt geformte Ankerrαhre und dementsprechend geformte Flachanker mit allseitig ebener Oberfläche sind nicht bekannt. Bei den bekannten Wegeventilen reichen die Steuerkolben in die und über die Rücklaufkammern, wodurch die Kblbeπgewichte, die Verwirbelung der Oelstrome, deren Ourchfliesswiderstände, SchaltStörungen und Schaltschläge erhöht werden. Bei den bekannten Ventilen sind die Rücklaufkammern über einen Querkanal miteinander und mit mit dem Abflusskanal verbunden, wobei in deren Bereichen Oruckausgleichsmittel und Strömuπgsschikanen gegen unausgeglichene am Steuerkolben wirksame Kräfte erforderlich sind. Die Federkräfte dieser Ventile sind im allgemeinen und im besonderen im Verhältnis zur Magnetkraft zu schwach, so dass Magnet- und Federkraft-Kennlinie bei kleiner werdendem Schaltweg stark auseinanderdriften und daher bei kurzhubigen Magneten zu einem Leistungsabfall magnet- und ventilseitig führen. Obschon bekannt ist, dass kennlinienbeeinflusste Topfmagnete für kurzhubige Schnellläufer - auch wegen der restmagnetischeπ Ankerhaftung - ungeeignet sind, sind die bekannten Mehrkammer - Wegeventile durchwegs damit ausgerüstet. Oie beeinflusste Magnetkraft-Kennlinie kann ihre Aufgabe einer Anpassung an die Federkraft-kennlinie bei kurzhubigen Magneten nie erfüllen. Es ist die Aufgabe der Erfindung, ein Mehrkammer- Wegeveπtil in kurzhubiger Bauweise und mit hoher SchalthäuFigkeit ventil- und magπetseitig leistungsmässig zu verbessern, konstruktiv zu vereinfachen und preisgünstiger herzustellen.Internally curved anchor tubes and correspondingly shaped flat anchors with a flat surface on all sides are not known. In the known directional control valves, the control pistons extend into and over the return chambers, as a result of which the Kblbeπweights, the swirling of the oil flows, their flow resistance, switching disturbances and switching shocks are increased. In the known valves, the return chambers are connected to one another and to the outflow channel via a transverse channel, wherein pressure compensation means and flow baffles against unbalanced forces acting on the control piston are required in their areas. The spring forces of these valves are generally too weak, especially in relation to the magnetic force, so that the magnetic and spring force characteristics drift apart as the switching travel becomes shorter and therefore lead to a drop in performance on the solenoid and valve side in the case of short-stroke magnets. Although it is known that characteristic-influenced pot magnets are unsuitable for short-stroke high-speed runners - also because of the residual magnetic armature adhesion - the well-known multi-chamber directional valves are consistently equipped with them. The magnetic force characteristic that is influenced by it can never fulfill its task of adapting to the spring force characteristic for short-stroke magnets. It is the object of the invention to improve a multi-chamber way valve in a short-stroke design and with a high switching frequency in terms of performance on the valve and magnet side, to simplify the design and to produce less expensively.
Die wesentlichen Merkmale des Erfinduπgsgegeπstandes ergebn sich aus dem Patentanspruch 1.The essential features of the subject matter of the invention result from patent claim 1.
Anhand der Zeichnung wird ein Ausführungsbeispiel des Erfindungsgegenstandes näher erläutert.An embodiment of the subject matter of the invention is explained in more detail with reference to the drawing.
Figur 1 zeigt einen Längsschnitt durch das Mehrkammer- Wegeventil mit dem Ventilkörper 1, darin ausgesparter, von der Pumpe des Hydrauliksystems beaufschlagter Druckkammer 2, über den Steuerkolben 6 damit verbundener Verbraucherkammer 4 und die mit den Rücklaufkammern 5 via Steuerkolben in Verbindung stehende Verbraucherkammer 3, sowie ein mit dem Ventilkörper 1 druckdicht verschraubtes Magnetsystem. Oer achsial bewegliche Steuerkolben 5 ist gegenüber, den üblichen Ausführungen gewichts- und längen- mässig so reduziert, dass für dessen Verschiebung Kräfte eingespart und die Rücklaufkammerπ 5 von Oelverwirbelungsschikanen, Staudruckschlagen und hohen Ourchfliesswiderständen befreit sind. Bleiches gilt für die stark verkürzten, gradlinig und glattwandig ausgeführten und querschnittsmässig vergrösserten Abflussbohrungen 20, wodurch sich der Ourchfluss erhöht und die Kolbenschaitungen weicher w erden.Figure 1 shows a longitudinal section through the multi-chamber directional valve with the valve body 1, therein recessed pressure chamber 2 acted upon by the pump of the hydraulic system, via the control piston 6 connected to the consumer chamber 4 and the consumer chamber 3 connected to the return chambers 5 via control piston, and a magnet system screwed to the valve body 1 in a pressure-tight manner. The axially movable control piston 5 is reduced in weight and length in comparison with the conventional designs in such a way that forces are saved for its displacement and the return chamber 5 are freed from oil swirling baffles, dynamic pressure surges and high flow resistances. The same applies to the drastically shortened, straight-line and smooth-walled drain holes 20 which are enlarged in cross section, as a result of which the flow increases and the piston strings become softer.
Um eine bessere Anpassung der beiden Kennlinien der Magnet- und Federkraft zu erzielen, ist eine konische Feder 7 mit stark progressiv ansteigender Kennlinie eingebaut. Sie sitzt mit der geschliffenen Windung auf dem zentrischen Kolbenendezapfen 10 und in der Aussparung 8 des druckdicht verschraubten Stopfens 9. Oie Aussparung 8 dient auch dazu, die Federvαrspannung und damit ihre Abschaltkraft und die Leistung des Ventils zu erhöhen. Oer im Längsschnitt etwa elliptisch ausgefräste Teil des aus einem einzigen Stück bestehenden Ankerrohres 12 liegt ausserhalb des Bereiches der Kupferdrahtwicklung 29 des Magneten 16. Oie beiden etwa ell ipsoidähnlich geformten Bereiche der Ankerrohrausfräsung und des Magneten sind derart, dass beim Abfallen des Magnetankers 14 vom Ankergegenstück 19 der Ankerscheitel 13 auf dem Ankerrohrboden 11 oeldruckgedämpft aufschlägt und die Oelverdrängung aus dem gekrümmten und zylindrischen Raumbereich 23 - dank den rillen- und lochfreien Flächen von Rohr und Anker, des sich gekrümmt bis zum Ankerscheitel verengenden Oelraumes , der im Verhältni s zur Oelmenge reichlich bemessenen Kreisabschnittsräume 23 ringsum den zylindrischen Ankerteil und nicht zuletzt infolge der genauen Ankerführung durch die sechs geschliffenen Führungskanten 22 - ohne Oelverwirbelung und Rückstaus schnell und schlaglos vor sich geht. Oies wirkt sich positiv auf eine weiche und saubere Schaltung, kürzere Schaltzeiten und einen geringeren Kraftaufwand aus. Konstruktion und Herstellung von Ankerrohr, Anker und Ankergegenstück sind gegenüber bisherigen Ausführungen vereinfacht und kostengünstiger.In order to achieve a better adaptation of the two characteristic curves of the magnetic and spring force, a conical spring 7 with a strongly progressively increasing characteristic curve is installed. It sits with the ground turn on the central piston end pin 10 and in the recess 8 of the pressure-tight screwed plug 9. The recess 8 also serves to increase the spring tension and thus its shutdown force and the performance of the valve. Oer in the longitudinal section approximately elliptically milled part of the A single piece of existing anchor tube 12 lies outside the area of the copper wire winding 29 of the magnet 16. Both of the approximately ellipsoidal shaped areas of the anchor tube cutout and the magnet are such that when the magnet armature 14 falls off the anchor counterpart 19, the anchor apex 13 strikes the anchor tube bottom 11 with oil pressure damping and the displacement of oil from the curved and cylindrical space 23 - thanks to the groove-free and hole-free surfaces of the tube and anchor, the oil space narrowing to the crown of the anchor, the circular section spaces 23, which are generously proportioned to the amount of oil, all around the cylindrical anchor part and not least as a result the precise anchor guidance through the six ground guide edges 22 - without oil swirling and backflow occurs quickly and smoothly. Oies has a positive effect on a smooth and clean shift, shorter shift times and less effort. Design and manufacture of anchor pipe, anchor and anchor counterpart are simplified and cheaper compared to previous designs.
Die Polschliessflachen 18 von Anker und Ankergegenstück sind eben, und um der Gefahr einer sogenannten "Verschweissung" beider Flächen vorzubeugen, ist diejenige des Ankergegenstückes vorteilhafterweise mit einer diagonal verlaufenden Rille versehen. Oer Luftspalt zwischen den beiden Polflächen ist bei kurzhubigen Schnell-Läufern relativ klein und liegt im allgemeinen zwischen 10 und 30 mm. Wie der Anker muss auch der Schaltstift 15 zentrisch sauber geführt sein und trotzdem noch einen genügenden Oeldurchgang durch die Schaltstiftbohrung gewährleisten, d.h. dass auch dieser Schaltstift zweckmässigerweise aus einem prismatischen Stab gefertigt ist. Je nach den Anforderungen und den vorhandenen Parametern eines Mehrkammer - Wegeventils kann es von Vorteil sein, die elektromagnetischen Kräfte zu modifizieren. Beim dargestellten Magneten können zu diesem Zweck die Polscheiben 31 und 32 gegenseitig ausgetauscht oder durch neue ersetzt werden. Gleiches gilt für die Rohrmiete 25 und den Magnetmaπtel 30. Alle Einzelteile des Magneten sind so konstruiert und bearbeitet, dass sie ohne maschinelle Hilfsmittel zu einer kompakten Magnetspule zusammengefügt werden können.The pole closing surfaces 18 of the armature and armature counterpart are flat, and in order to prevent the risk of so-called "welding" of both surfaces, that of the armature counterpart is advantageously provided with a diagonally running groove. The air gap between the two pole faces is relatively small in short-stroke high-speed runners and is generally between 10 and 30 mm. Like the armature, the switching pin 15 must also be guided in a centrically clean manner and still ensure sufficient oil passage through the switching pin bore, ie that this switching pin is also expediently made from a prismatic rod. Depending on the requirements and the existing parameters of a multi-chamber directional valve, it can be advantageous to modify the electromagnetic forces. In the magnet shown, the pole disks 31 and 32 can be exchanged for this purpose or replaced by new ones. The same applies to the tube rental 25 and the Magnetmaπtel 30. All individual parts of the magnet are designed and processed so that they can be assembled into a compact solenoid coil without mechanical aids.
Auf einen Kunststoff-Spulenträger 24 mit seitlichen Flanschen ist die Kupferwickluπg 29 aufgebracht und in seine achsiale Rundöffnung ist das mit dem Ankergegenstück verbundene Aπkerrohr eingeführt. Die Rundspule 24 ist auf dem Ankerrohr 12 volle 360 Grad drehbar. Gehalten wird, die Spule durch eine Mutter 33. Die achsiale Rundöffnung des Spulenträgers 24 besitzt auf beiden Seiten über den ganzen Umfang sich erstreckende, achsial voneinander getrennte Aussparungen für die Aufnahme von magnetfeldverstärkenden Rohrnieten 25, deren Aufbördelungen am Ende auf der Aussenseite auf den Polscheiben 31 und 32 dicht aufliegen. Zur weiteren Abdichtung zwischen Polscheiben 31 und 32 dient ein ringförmig gespritzter Kunststoffwulst 27. Aussparungen 26 am äusseren Umfang der Kunststoff-Flansche ermöglichen den Durchgang von kalt aushärtendem Giessharz aus dem Mantelraum 28 in die stirnseitigen Zwischenräume 34. The copper winding 29 is applied to a plastic coil carrier 24 with lateral flanges and the armature tube connected to the armature counterpart is inserted into its axial round opening. The round coil 24 can be rotated a full 360 degrees on the anchor tube 12. The coil is held by a nut 33. The axial round opening of the coil carrier 24 has recesses on both sides that extend over the entire circumference and are axially separated from one another for receiving magnetic field-strengthening tubular rivets 25, the flanges of which end on the outside on the pole disks 31 and 32 lie tight. A ring-shaped injection molded plastic bead 27 is used for further sealing between pole disks 31 and 32. Recesses 26 on the outer circumference of the plastic flanges allow the passage of cold-curing casting resin from the jacket space 28 into the intermediate spaces 34.

Claims

PATENTANSPRUECHE PATENT CLAIMS
Magnetisch betätigtes WEGEVENTIL mit Federrückführung [7], Verbraucher- [3+4], Druck- (2) und Rücklaufkammern [5], druckdichtem Gleichstrommagnet(16), Ankergegenstück [19], Ankerrohr [12], Flachanker [14] und über Schaltstift [15] verschiebbarem Steuerschieber C1S3 dadurch gekennzeichnet,Magnetically operated WAY VALVE with spring return [7], consumer [3 + 4], pressure (2) and return chambers [5], pressure-tight DC magnet (16), armature counterpart [19], armature tube [12], flat armature [14] and above Switch pin [15] sliding control slide C1S3 characterized in
dass der Iππenraurn des aus einem Stück gefertigten Ankerrohres [12] gegen das geschlossene dem Ankergegenstück [19] abgekehrten Ende [11] hin ellipsoid-kegelstumpfähnlich geformt und der darin bewegliche polygonale Flachanker [14] dieser Form angepasst ist.that the inner space of the one-piece anchor tube [12] is shaped like an ellipsoidal truncated cone towards the closed end [11] facing away from the anchor counterpart [19] and the polygonal flat anchor [14] movable therein is adapted to this shape.
Wegeventil nach Anspruch 1 dadurch gekennzeichnet, dass eine der Magnetschliessebenen [18] durch eine diametrale Nut unterbrochen ist und die Druckfeder [7] eine progressivsteigende Belastungskennlinie aufweist.Directional control valve according to claim 1, characterized in that one of the magnetic closing planes [18] is interrupted by a diametrical groove and the compression spring [7] has a progressively increasing load characteristic.
Wegeventil nach Anspruch 1 dadurch gekennzeichnet, dass die Rücklaufkammern [5], an deren tiefster Stelle eine direkt zum Abfluss [21] führende Bohrung [2] mündet, steuerschieberfrei sind.Directional control valve according to claim 1, characterized in that the return chambers [5], at the lowest point of which a bore [2] which leads directly to the drain [21], are free of control spools.
Wegeventil nach Anspruch 1 dadurch gekennzeichnet, dass der Gleichstrommagnet [16] mit unterschiedlich starken, den Rohrmantel [30] stirnseitig schliessenden Polscheiben [31+32] versehen ist, die den Innenraum der Rohrπieten [25] -vom Giessharzraum [28+34] durch eine Ringwulst [27] abdichten. Wegeventil nach Anspruch 1, dadurch gekennzeichnetDirectional control valve according to claim 1, characterized in that the direct current magnet [16] is provided with pole disks [31 + 32] which close the tube jacket [30] at the front and which pass through the interior of the tube rivets [25] from the casting resin chamber [28 + 34] seal an annular bead [27]. Directional control valve according to claim 1, characterized
dass von den Rücklaufkammern [5] zum Ausfluss aus dem Ventilkörper [21] gradlinig ve^lsu^ende Bohrungen [20] vorgesehen sind, die an der tiefstliegenden Stelle der Rücklaufkammern münden.that from the return chambers [5] to the outlet from the valve body [21] there are straight bores [20] which open at the lowest point of the return chambers.
Wegeventil nach Anspruch 1, dadurch gekennzeichnetDirectional control valve according to claim 1, characterized
dass die Gegenkraftseite des Ventils mit einer Druckfeder [7] ausgerüstet ist, die auf dem . Steuerkolbenende und in der Ausbohrung [B] eines Verschluss-Stopfens [9] durch die FedervorSpannung verankert ist.that the counterforce side of the valve is equipped with a compression spring [7], which on the. Control piston end and in the bore [B] of a sealing plug [9] is anchored by the spring preload.
Wegeventil nach Anspruch 6, dadurch gekennzeichnet, dass die Druckfeder [ 7] eine progressivsteigende Belastungskennlinie aufweist. Directional control valve according to claim 6, characterized in that the compression spring [7] has a progressively increasing load characteristic.
PCT/CH1987/000011 1986-01-31 1987-01-27 Multi-chamber magnetic distributing valve WO1987004850A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH36286 1986-01-31
CH0362/86-4 1986-01-31

Publications (1)

Publication Number Publication Date
WO1987004850A1 true WO1987004850A1 (en) 1987-08-13

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ID=4185292

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1987/000011 WO1987004850A1 (en) 1986-01-31 1987-01-27 Multi-chamber magnetic distributing valve

Country Status (2)

Country Link
EP (1) EP0259356A1 (en)
WO (1) WO1987004850A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3844411A1 (en) * 1988-12-30 1990-07-05 Rexroth Mannesmann Gmbh Proportional valve activated on one side and having a centring position
DE4111987A1 (en) * 1991-04-12 1992-10-15 Bosch Gmbh Robert EM valve for fluid power directional operation - has cylindrical armature with increased cross=section near to pole surface to reduce air gap resistance and increase magnetic force
DE19711289A1 (en) * 1997-03-18 1998-09-24 Itt Mfg Enterprises Inc Valve for e.g. vehicle braking system
FR2957131A1 (en) * 2010-03-05 2011-09-09 Bosch Gmbh Robert SOLENOID VALVE FOR CONTROLLING A FLUID
DE102010063727B4 (en) 2010-12-21 2019-05-23 Robert Bosch Gmbh magnetic valve
DE102020132192A1 (en) 2020-12-03 2022-06-09 Arnold Umformtechnik Gmbh & Co. Kg Method for manufacturing a valve armature of a solenoid valve, valve armature and solenoid valve
DE102021208274A1 (en) 2021-07-30 2023-02-02 Festo Se & Co. Kg diaphragm valve
US11959563B2 (en) 2022-07-27 2024-04-16 Festo Se & Co. Kg Membrane valve

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909713A (en) * 1957-11-18 1959-10-20 Thompson Ramo Wooldridge Inc High temperature solenoid
DE2117579A1 (en) * 1970-04-20 1971-11-04 Lisk Co G W Electromagnet
DE2636284A1 (en) * 1975-08-15 1977-03-03 Fujikoshi Kk Solenoid cylindrical coil with non-magnetic armature guide cylinder - has thin magnetic sheets wound round outer guide cylinder surface
EP0027404A1 (en) * 1979-10-16 1981-04-22 Merlin Gerin Miniature electric circuit breaker in moulded case
EP0038128A1 (en) * 1980-04-04 1981-10-21 General Signal Corporation Electro-hydraulic servo activator system
DE3201718A1 (en) * 1982-01-21 1983-07-28 Binder Magnete GmbH, 7730 Villingen-Schwenningen Lifting magnet

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909713A (en) * 1957-11-18 1959-10-20 Thompson Ramo Wooldridge Inc High temperature solenoid
DE2117579A1 (en) * 1970-04-20 1971-11-04 Lisk Co G W Electromagnet
DE2636284A1 (en) * 1975-08-15 1977-03-03 Fujikoshi Kk Solenoid cylindrical coil with non-magnetic armature guide cylinder - has thin magnetic sheets wound round outer guide cylinder surface
EP0027404A1 (en) * 1979-10-16 1981-04-22 Merlin Gerin Miniature electric circuit breaker in moulded case
EP0038128A1 (en) * 1980-04-04 1981-10-21 General Signal Corporation Electro-hydraulic servo activator system
DE3201718A1 (en) * 1982-01-21 1983-07-28 Binder Magnete GmbH, 7730 Villingen-Schwenningen Lifting magnet

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3844411A1 (en) * 1988-12-30 1990-07-05 Rexroth Mannesmann Gmbh Proportional valve activated on one side and having a centring position
DE4111987A1 (en) * 1991-04-12 1992-10-15 Bosch Gmbh Robert EM valve for fluid power directional operation - has cylindrical armature with increased cross=section near to pole surface to reduce air gap resistance and increase magnetic force
DE19711289A1 (en) * 1997-03-18 1998-09-24 Itt Mfg Enterprises Inc Valve for e.g. vehicle braking system
FR2957131A1 (en) * 2010-03-05 2011-09-09 Bosch Gmbh Robert SOLENOID VALVE FOR CONTROLLING A FLUID
DE102010063727B4 (en) 2010-12-21 2019-05-23 Robert Bosch Gmbh magnetic valve
DE102020132192A1 (en) 2020-12-03 2022-06-09 Arnold Umformtechnik Gmbh & Co. Kg Method for manufacturing a valve armature of a solenoid valve, valve armature and solenoid valve
US11788629B2 (en) 2020-12-03 2023-10-17 Bürkert Werke GmbH & Co. KG Method of manufacturing a valve armature of a solenoid valve, valve armature and solenoid valve
DE102021208274A1 (en) 2021-07-30 2023-02-02 Festo Se & Co. Kg diaphragm valve
US11959563B2 (en) 2022-07-27 2024-04-16 Festo Se & Co. Kg Membrane valve

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Publication number Publication date
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