EP0144337B1 - Druckluftspareinrichtung - Google Patents

Druckluftspareinrichtung Download PDF

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Publication number
EP0144337B1
EP0144337B1 EP84901374A EP84901374A EP0144337B1 EP 0144337 B1 EP0144337 B1 EP 0144337B1 EP 84901374 A EP84901374 A EP 84901374A EP 84901374 A EP84901374 A EP 84901374A EP 0144337 B1 EP0144337 B1 EP 0144337B1
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EP
European Patent Office
Prior art keywords
piston
valve
fluid
conduit
chamber
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84901374A
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English (en)
French (fr)
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EP0144337A1 (de
Inventor
André Legris
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Legris SA
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Legris SA
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Publication of EP0144337A1 publication Critical patent/EP0144337A1/de
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Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/064—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam with devices for saving the compressible medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
    • F15B2211/50581—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves

Definitions

  • the present invention relates to an automatic compressed air saver device.
  • European patent application EP-A-89881 (state of the art as defined in Article 54 (3) EPC) relates to a compressed air saving device making it possible to regulate a pressure lower than that during the duration of the pressure relief valve of the motor of an appliance user in particular of a jack.
  • This document describes a device comprising a means ensuring the passage of the working fluid under pressure during most of the stroke of the movable member of the jack and closing said passage of pressurized fluid before or at the end of the stroke of said movable member.
  • the patent GB-A-2,074,701 also describes a compressed air saving device operating on the principle of a valve opening dependent on the characteristics of a spring which can be adjusted on demand.
  • the present invention relates to an improved economizer device of this type mounted in a simple connector intended to equip a single chamber with a double-acting cylinder.
  • the automatic compressed air saving device consists of a simple connector body comprising a cylindrical part on which is mounted a bushing comprising a fluid supply pipe, this pipe extending perpendicular to the 'axis of the body, the latter containing a valve capable of closing or freeing the passage of the supply fluid, connected by a rod to a piston subjected to the action of an elastic member; said device is intended to be interposed on the one hand between one of the chambers of an actuator and a power distributor of the actuator, this via a conduit connected to the tubing; on the other hand between the other chamber of the jack and the body via another conduit and a tube leading to a chamber of the body situated above the piston and also being connected to a conduit, itself directly connected to the distributor of such so that when the piston of the jack delimiting the two chambers moves in one direction, the fluid escaping by the conduit connecting the other chamber of the jack to the distributor, transform its pressure called exhaust pressure by the other conduit in the chamber of the body, exhaust pressure which acts on a
  • This device makes it possible to stop the supply of fluid to the jack before or at the end of the piston stroke and to adjust the speed of this piston, according to the work to be performed.
  • the control of the valve is obtained either by the drop in pressure of the exhaust fluid or by a pressure signal emitted by a limit switch of the jack.
  • Figure 1 there is shown a cylinder 1 in which is slidably mounted a piston 2 having a rod 3 actuating any member not shown in the drawing.
  • a compressed air saving device 4 mounted between one of the chambers 1a of the jack and a distributor 5 selectively connecting the chamber 1a to a source of compressed air and to the at mosphere, the other chamber 1 of the jack being connected directly by a conduit 6 to the distributor 5, but it would obviously be possible to mount on the conduit 6 an economizer device identical to the economizer device 4.
  • the economizer device 4 comprises a body 7 of tubular shape having at its lower part a threaded part 8 for its mounting in a tapped hole of a support member and a cylindrical part on which is rotatably mounted a bushing 9 comprising a tubing 10 of outlet of the fluid towards a conduit 11 and the chamber 1a of the jack, said tube 10 extending perpendicular to the axis of the body 7.
  • the body 7 contains a valve 12 which is connected by a rod 14 to a piston 13 and which is capable of closing the passage between the conduit 15 and the conduit of the tube 10, coming to bear against a seat 16 formed in the body 7. Above the seat 16, a tubular space is in communication through orifices 17 with a conduit 18 formed in the tubing 10 and opening into the conduit 11.
  • the conduit 18 has orifices 19 which are closed outside of said conduit by a deformable sleeve 20 fixed at one of its ends and the other end of which is free to open to allow the fluid coming from the conduits to pass 11 and 18 towards a tubular part 21 which opens into the conduit 15 and short-circuits the seat 16 of the valve 12.
  • This sleeve 20 constitutes a one-way valve allowing the passage of the fluid only in the direction of the chamber 1a towards the distripter 5 .
  • a threaded part into which is screwed a plug 22 which has in its central part a housing 24 in which is mounted a spring 23 bearing against the face of large cross section of the piston 13, so as to adjust the pressure of the spring 23 on the piston and on the valve 12 to adjust the flow rate of the fluid and the speed of the piston 2.
  • the housing 24 extends to the upper part of the plug 22 and opens out through orifices 25 in a tube 26 which is integral with a socket 27 engaged on the upper external part of the plug 22 and which extends perpendicular to the axis of the body 7.
  • the tubing 26 is connected by a conduit 28 for taking the pressure to the conduit 6 for the exhaust fluid coming from the chamber 1b of the jack 1.
  • the fluid can escape to the annular space 21 and the conduit 15 to the distributor 5. via the one-way valve 20, which increases the flow rate at the exhaust.
  • the plug 22 is acted on which can be more or less screwed, in order to modify the tension on the spring 23 and the orifice for passage of the fluid between the seat 16 and the valve 12.
  • FIG 2 there is shown an economizer device identical to that of Figure 1, however in this embodiment a valve is used which alone ensures the passage of fluid to the intake and exhaust.
  • valve 30 has a rod 31 which is slidably mounted in a blind hole 32 formed in the lower part of the piston 13, this valve 30 being subjected to the action of a spring 33 acting in the closing direction. valve 30.
  • Tubing 10 has only one conduit 18 and the unidirectional valve 20 has been removed.
  • the chamber 1a of the jack is supplied with working fluid, the exhaust fluid flowing from the chamber 1b of the jack, the piston 13 is held in the low position under the combined action of the spring 23 and the pressure of the fluid d 'exhaust coming from the duct 28, so that the valve 30 remains in the open position allowing passage of the working fluid towards the duct 11.
  • the speed of the piston 2 is adjusted in the same way as above by acting on the plug 22 and compressing the spring 23 more or less so as to allow a greater or lesser passage between the valve 30 and its seat 16.
  • FIG. 3 there is shown an economizer device which is similar to that of Figure 1, however the plug 22 is fixed and is not a means of adjusting the tension of the spring 23 as in FIG. 1 in order to control the orifice for the passage of the fluid and the speed of movement of the piston 2 in the jack.
  • the device comprises a main body 7 which has at its base a threaded part 34 engaged in a tapped hole of a secondary body made up of two inlet pipes 35 and outlet 36 for the fluid which are arranged in extension of one another along the same axis perpendicular to the axis of the main body 7.
  • the control means of the valve 30 is identical to that having the object of the embodiment of FIG. 2.
  • the economizer device shown in Figure 5 is identical to that of Figure 3, but it comprises as before a secondary body consisting of two tubes 35, 36 arranged in the extension of one another along the same axis.
  • the control means of the valve 12 and the unidirectional valve 20 are identical to those forming the subject of FIG. 3 which do not include any means for adjusting the tension of the spring 23.
  • an economizer device comprising a body 37 which has a flat face 38 by which it is fixed to a corresponding face of an apparatus including a distributor 39 whose orifices 40, 40a, 40b are located opposite the supply and exhaust ports of the economizer.
  • the valve 30 is controlled by a piston 13 in the same manner as described above with regard to the device in FIG. 2.
  • Figure 7 there is shown a device identical to that of Figure 6 but sandwiched between two devices 41 and 42.
  • the body 37 of the device has two plane faces 37a, 37b which are in contact with corresponding faces of the two devices.
  • Ports 43a, b, c of the devices provide direct communication with the orifices of the body 37 of the economizer device.
  • FIG. 8 shows an economizer device in which the body 7 contains a piston 44 which has a blind hole 32 in which the rod 31 of the valve 30 is slidably mounted.
  • the body 7 is closed by a plug 45 against which is supported by one of its ends a spring 46 which acts by its other end on the piston 44.
  • a plug 45 against which is supported by one of its ends a spring 46 which acts by its other end on the piston 44.
  • a tapped hole in which is engaged a screw comprising at one of its ends a pin 48 bearing against members 49 integral with the piston 44.
  • This arrangement makes it possible to more or less compress the spring 46 by acting on the screw 47 and on the piston 44 to adjust the air flow and consequently the speed of the piston 2 of the jack.
  • the tube 10 is mounted on the body 7 by its sleeve 27 a tube 26 connected by the conduit 28 to the exhaust of the chamber 1b of the jack.
  • the tubing 26 has an inclined conduit 50 which opens into an annular space 51 in communication through an orifice 52 of the body 7 and a conduit 53 formed in the central part of the piston 44 with a chamber 54 disposed above the piston 44.
  • the part of the chamber 54 located under the piston is connected to the atmosphere by a conduit 55 in the body 7, an annular space 56 separated from the annular space 51 by an O-ring 57, and an orifice 58 formed in the socket. 27.
  • FIG. 9 there is shown a device in which a piston 59 is connected to a valve 60 by a rod 61, said valve being held in its seat in the closed position by a spring 62 disposed in a housing 63 of a plug 64 engaged in the body 7 and having a threaded part 65 which is engaged in a corresponding tapped hole of a ring 66 mounted rotatably and captive by a rib 67 engaged in a groove on the body 7.
  • This arrangement allows by acting by rotation on the ring 66 to move the plug 64 axially and more or less compress the spring 62 to adjust the fluid flow and the speed of the piston of the jack.
  • a unidirectional ball valve 68 making it possible to vent the space located above the valve 60.
  • valve 60 When the chamber 1a of the jack 1 (FIG. 1) is supplied with fluid, the valve 60 is in the open position, the piston 59 being raised against the action of the spring 62 by the pressure of the escaping fluid from chamber 1 of the jack which enters chamber 69 via the tubing 26.
  • the unidirectional valve 20 makes it possible to short-circuit the valve 60 to allow the passage of the fluid in the opposite direction when the chamber 1 a of the jack is in the exhaust phase.
  • the device shown in Figure 10 is similar to that of Figure 9 except for the body 70 which is in one piece and has two pipes 71, 72 which are located in the extension of one another along the same axis for mounting on a conduit.
  • connection with the fluid exhaust duct is carried out by means of a duct 73 opening into the chamber 69 of the body 70.
  • FIG. 11 another embodiment of an economizer device is shown, the valve of which is controlled on closing by a pressure signal emitted by an end-of-stroke detector of the piston 2 of the jack 1 or any other means emitting a pressure signal.
  • This device comprises a plug 22 having a threaded portion 74 by which it is screwed into the body 7 on which is mounted at right angles by means of a socket 9 a tube 10 containing a one-way valve 20.
  • the plug 22 has a housing 75 in which a piston 76 is slidably mounted subjected to the action of a spring 77 and having one of its ends a shutter member 78 constituting the valve bearing against a seat 79 formed in the body between the conduits 15 and 18.
  • conduit 80 connected to a means emitting a pressure signal, in particular at the end of the stroke of the jack piston.
  • FIG 12 there is shown an economizer device whose valve is also controlled by a pressure signal.
  • a piston 81 secured to a valve 82 held in the open position by a spring 83.
  • a plug 84 having a threaded part 85 by which it is engaged in a tapped hole of an adjustment ring 86 having a circular rib 87 engaged in a groove of the body 7, said ring being thus kept rotating on the body 7.
  • the plug 84 has a conduit 88 through which a pressure signal can be transmitted to the piston 81 to effect the closing of the valve 82 against the action of the spring 83 at a determined time, notably during the end position of cylinder stroke.
  • FIG. 13 shows a device identical to that of FIG. 12, however, this does not include a spring 83, owing to the fact that the chamber 89 is connected to the atmosphere by a conduit 90.
  • FIG. 14 shows a device similar to that of FIG. 12 but in which the input of the pressure signal takes place laterally.
  • the device comprises above the tubing 10 another tubing 91 which comprises a sleeve 92 engaged on the body 7 and comprising seals 92a 92b so as to isolate an annular space between the body 7 and the sleeve 92, said annular space connecting the conduit 93 through an orifice 94 to a chamber 95 located above the piston 81.
  • the pressurized fluid corresponding to a signal can therefore propagate from the conduit 93 to the chamber 95 where it acts on the piston 81 against the action of the spring 83 and ensures the closing of the valve 82 normally open.
  • the device represented in FIG. 15 is identical to that of FIG. 14 except with regard to the arrangement of the body 96 which comprises two tubes 96a, 96b situated along a same axis in the extension of one another, said tubes ensuring in one direction the passage of the fluid through the valve 82 or in the other direction by means of the one-way valve 20.
  • FIG 16 The device shown in Figure 16 is identical to that of Figure 8, however it is used in the case of a piston operating under the action of a pressure signal.
  • the sleeve 27 is turned over so that the inclined conduit 50 opens into the annular space 56 and through the orifice 55 in the chamber 54a located under the piston 44. Furthermore, the space 51 being connected to the atmosphere through the orifice 58 of the socket 27, it is thus possible to connect the space 54 to the atmosphere through the conduit 53 which opens into the annular space 51.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Driven Valves (AREA)
  • Check Valves (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (10)

1. Automatische Druckluftspareinrichtung (4), die aus einem einfachen Anschlußkörper (7) mit einem zylindrischen Teil besteht, auf welchem eine ein Röhrchen (10) zur Versorgung mit einem fluiden Medium umfassende Buchse (9) gelagert ist, wobei dieses Röhrchen (10) sich senkrecht zu der Körperachse (7) erstreckt, und dieser Körper ein Ventil (12, 30, 82) enthält, das den Durchgang des Versorgungsfluids verschließen oder freigeben kann und über eine Stange (14) mit einem der Wirkung eines elastischen Elementes (23) unterworfenen Kolben (13, 81) verbunden ist; die obengenannte Einrichtung (4) ist dazu bestimmt, einerseits zwischen einer der Kammern (1a) eines Arbeitszylinders (1) und einem Verteiler (5) zur Versorgung des Arbeitszylinders (1) eingefügt zu werden, und dies über eine mit dem Röhrchen (10) verbundene Leitung (11); und andererseits zwischen der anderen Kammer (1b) des Arbeitszylinders (1) und dem Körper (7) über eine andere Leitung (28) und ein Röhrchen (26, 91), das in eine Kammer (29) des Körpers (7) mündet, die sich über dem Kolben (13) befindet, und ebenfalls mit einer Leitung (6) verbunden ist, die ihrerseits unmittelbar mit dem Verteiler (5) verbunden ist, so, daß wenn der Kolben (2) des Arbeitszylinders (1), der die zwei Kammern (1a und 1b) begrenzt, sich in eine Richtung (Pfeil F) verlagert, das fluide Medium, das aus der Leitung (6) ausfließt, welche die andere Kammer (1b) des Arbeitszylinders (1) mit dem Verteiler (5) verbindet, ihren sogenannten Ausfließdruck über die andere Leitung (28) in die Kammer (29) des Körpers (7) weiterleitet, wobei dieser Ausfließdruck auf einer großen Fläche (13a) des Kolbens (13) wirkt, so daß das Ventil (12) in seine Öffnungslage gebracht wird, bis zu dem Zeitpunkt wo, am Hubende des Arbeitszylinders (1) und wenn der Ausfließdruck verschwindet, der Antriebsdruck der einzige ist, der auf eine kleine Fläche (13b) des Differentialkolbens (13) weiterhin ausgeübt wird und so das Verschließen des Ventils (12) bewirkt; wobei ein Rückschlagventil (20) vorgesehen ist, um das Ventil (12) kurzzuschließen, wenn der Kolben (2) des Arbeitszylinders (1) sich in umgekehrter Richtung (dem Pfeil F entgegen) verlagert und wenn das obengenannte Ventil (12) sich dann in seiner geöffneten Lage befindet, unter der Wirkung des elastischen Elementes (23).
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Körper (7) auf seinem unteren Teil ein Röhrchen (15) zum Durchgang des fluiden Mediums aufweist, das mit einem Gewinde versehen ist und das auf ein Trägerelement aufgeschraubt werden kann.
3. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Körper (7) auf seinem unteren Teil zwei Röhrchen (35, 96a; 36, 96b) zum unmittelbaren Durchgang des fluiden Mediums aufweist, die sich in gegenseitiger Verlängerung entlang einer selben Achse befinden, wobei die obengenannten Röhrchen (35, 96a; 36, 96b) eine durchquerende Leitung aufweisen, wovon die Öffnung durch das Ventil (12,30,82) gesteuert wird, wobei der obengenannte Körper (7) auf seinem oberen Teil mit einer Buchse (27, 92) versehen ist, die ein Röhrchen (26, 91) aufweist, das einen sich über oder unter dem Kolben befindlichen Raum mit einer Drucksignalabnahme in Verbindung setzt, wobei das obengenannte Röhrchen (26, 91) senkrecht zu seiner Achse in den Körper (7) ausmündet.
4. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie eine Klappe (30) vom offenen Typ umfaßt, die den Durchgang des Antriebs- und des Ausfließfluids steuert, wobei diese obengenannte Klappe der Wirkung einer Feder (33) unterworfen ist und eine Stange (31), welche in einem Sackloch (32) des Differentialkolbens (13) gleitend gelagert ist, aufweist.
5. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Kolben (44) eine zentrale Leitung (53) aufweist, die über der Fläche des Kolbens (44) mit großem Querschnitt und seitlich gegenüber einer in dem Buchsenröhrchen (26) vorgesehenen Leitung (50) mündet, wobei dieses Buchsenröhrchen mit einer Druckenlastungsleitung verbunden ist und umgesteuert werden kann, um eine unter dem Kolben auf der dem elastischen Element (46) entgegengesetzten Seite vorgesehene Kammer (54a) zu versorgen, wenn das Röhrchen (26) mit einem Sender für ein Fluiddrucksignal verbunden ist.
6. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie eine Klappe (60) umfasst, die normalerweise geschlossen ist unter der Wirkung einer Feder (62), welche auf eine der Flächen des Steuerkolbens (59) wirkt, wovon die andere Fläche dem Fluidausfließdruck der anderen Kammer des Arbeitszylinders (1) unterworfen ist.
7. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie eine Klappe (78) umfaßt, die normalerweise geschlossen ist und die einen Kolben (75) bildet, welcher auf einer seiner Flächen der kombinierten Wirkung einer Feder (77) und eines Drucksignals unterworfen ist und der auf seiner anderen Fläche der Wirkung des Antriebsfluids unterworfen ist.
8. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie eine Klappe (82) umfaßt, die normalerweise unter der Wirkung eines elastischen Elementes (83) geöffnet ist, welches auf eine der Flächen des Kolbens (81) wirkt, dessen andere Fläche der Wirkung eines Drucksignals unterworfen ist.
9. Einrichtung nach den Ansprüchen 1 oder 4, dadurch gekennzeichnet, daß der Anschlußkörper (37) eine ebene Oberfläche (38) aufweist, die in Kontakt mit einer entsprechenden Fläche eines Geräts (39) steht, auf welchem er gelagert ist, wobei Geräteleitungen (40,40a, 40b) mit den Leitungen der Spareinrichtung verbunden sind.
10. Einrichtung nach den Ansprüchen 1 oder 4, dadurch gekennzeichnet, daß der Anschlußkörper (37) zwischen einem Fluidverteiler (42) und einem Sockel (41) angeordnet ist, mit welchen er in Kontakt über zwei seiner Flächen (37a, 37b) steht, wobei der obengenannte Sockel integrierte Kanäle aufweist, die einerseits die Verbindung mit den auf einer der Flächen des obengenannten Körpers (37) ausmündenden Leitungen und andererseits mit dem Arbeitszylinder und den Leitungen des Einlaß- und des Auslaßfluids herstellen, wobei der obengenannte Körper (37) auf einer anderen Fläche Leitungsöffnungen aufweist, die gegenüber den Öffnungen der Verteilerleitungen gelegen sind.
EP84901374A 1983-04-12 1984-04-11 Druckluftspareinrichtung Expired EP0144337B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8305965 1983-04-12
FR8305965A FR2544403B1 (fr) 1983-04-12 1983-04-12 Dispositif economiseur automatique d'air comprime

Publications (2)

Publication Number Publication Date
EP0144337A1 EP0144337A1 (de) 1985-06-19
EP0144337B1 true EP0144337B1 (de) 1988-08-03

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EP84901374A Expired EP0144337B1 (de) 1983-04-12 1984-04-11 Druckluftspareinrichtung

Country Status (8)

Country Link
US (1) US4741249A (de)
EP (1) EP0144337B1 (de)
JP (1) JPS60501512A (de)
DE (1) DE3473171D1 (de)
ES (1) ES531442A0 (de)
FR (1) FR2544403B1 (de)
IT (2) IT8453257V0 (de)
WO (1) WO1984004138A1 (de)

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DE20106511U1 (de) * 2001-04-14 2001-08-02 Festo Ag & Co Ventileinheit mit entsperrbarem Rückschlagventil und damit ausgestatteter fluidbetätigter Antrieb
FR2915787B1 (fr) * 2007-05-03 2012-05-18 Legris Sa Raccord de type bloqueur a clapet et moyens d'equilibrage de pression
FR2915786B1 (fr) * 2007-05-03 2009-07-17 Legris Sa Raccord de type bloqueur a clapet et purge
JP6551740B2 (ja) * 2015-10-28 2019-07-31 Smc株式会社 流体制御弁
US10927858B2 (en) 2016-06-22 2021-02-23 Aladdin Engineering And Manufacturing, Inc. Valve system for pneumatic cylinders
US10480542B2 (en) * 2016-06-22 2019-11-19 Aladdin Engineering And Manufacturing, Inc. Valve system for pneumatic cylinders

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FR2542043B2 (fr) * 1983-03-03 1986-08-08 Legris Dispositif economiseur d'air comprime

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089881A2 (de) * 1982-03-19 1983-09-28 Legris-Société Anonyme dite Druckluftspareinrichtung

Also Published As

Publication number Publication date
JPS60501512A (ja) 1985-09-12
FR2544403B1 (fr) 1985-08-09
IT8467368A0 (it) 1984-04-12
EP0144337A1 (de) 1985-06-19
IT1180055B (it) 1987-09-23
ES8502220A1 (es) 1984-12-16
FR2544403A1 (fr) 1984-10-19
IT8467368A1 (it) 1985-10-12
DE3473171D1 (en) 1988-09-08
US4741249A (en) 1988-05-03
ES531442A0 (es) 1984-12-16
IT8453257V0 (it) 1984-04-12
WO1984004138A1 (fr) 1984-10-25

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