EP1253326A2 - Pneumatikventil - Google Patents
Pneumatikventil Download PDFInfo
- Publication number
- EP1253326A2 EP1253326A2 EP02090158A EP02090158A EP1253326A2 EP 1253326 A2 EP1253326 A2 EP 1253326A2 EP 02090158 A EP02090158 A EP 02090158A EP 02090158 A EP02090158 A EP 02090158A EP 1253326 A2 EP1253326 A2 EP 1253326A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pneumatic valve
- opening
- valve according
- control
- end position
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/008—Throttling member profiles
-
- 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
-
- 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
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/428—Flow control characterised by the type of actuation actuated by fluid 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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
- F15B2211/8855—Compressible fluids, e.g. specific to pneumatics
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7781—With separate connected fluid reactor surface
- Y10T137/7784—Responsive to change in rate of fluid flow
- Y10T137/7787—Expansible chamber subject to differential pressures
- Y10T137/7788—Pressures across fixed choke
Definitions
- the invention relates to a pneumatic valve, in particular for use in a pneumatic linear actuator, according to the preamble of claim 1.
- Pneumatic linear actuators often have the problem that they are connected to a Supply device with a constant supply gas pressure connected pneumatic drives too fast at low loads (Slow) and too slow (fast) lifting (lowering) under heavy loads.
- the reason lies in the compressibility and thus in the energy storage capacity of the Working gas, for example the air.
- an approximation To achieve the same speed of movement of the pneumatic drive is a Pneumatic valve required that the volume flow to and from the pneumatic Keeps drive constant regardless of pressure.
- the known pneumatic valve has the disadvantage that the pneumatic valve with the Variable throttles must be in the power flow, which leads to a heavy weight Construction leads, since this must correspond to the mechanical stress.
- This version has the disadvantage that the volume flow is only in one Flow direction is adjustable. In addition, the design effort is high.
- the object of the invention is to propose a pneumatic valve that the Volume flow almost constant, regardless of pressure.
- the pneumatic valve should be like this be configured such that it can be operated in both flow directions.
- variable throttle runs across the Main connecting line has transverse opening in which between a first and a second end position at least in the direction of the second End position can be moved back and forth against an elastic counterforce is arranged, which has a control opening for the working gas, the more effective Opening cross section starting from the first end position with further movement of the Control steadily decreases that the control is moving seen on the side of the control element facing the first end position the gas pressure in front of the orifice and on the side facing the second end position of the control element is acted upon by the gas pressure after the orifice Opening cross-section depending on the gas pressure difference before and after the orifice Taxes.
- the transverse opening is a cylindrical one Through hole and the control element corresponding to this cylindrical control piston made of plastic, so that an almost friction-free Displacement of the control piston in the through hole is made possible.
- the elastic counterforce is a elastic element, especially a coil spring.
- control piston is expediently located in the absence of a gas pressure difference at a boundary and the control opening faces the largest provided Opening cross-section so that with a linear actuator with a nominal load to be lifted the full lifting force is effective immediately.
- the invention proposed that the main connecting line have two parallel ring channels, which can only be connected to one another via the control opening.
- control opening be in the V-grooves provided along the control piston is formed.
- through grooves of this type can achieve a particularly soft-opening adjusting throttle.
- the effective aperture area can be easily adjusted when through the aperture Control cylinder with tapered tip is inserted.
- the structurally simple solution provides that the control element on the first End position facing side via a first auxiliary connecting line with the part of the main connecting line immediately in front of the panel and on the second end position facing side via a second auxiliary connection line with the part of the main connection line immediately behind the panel connected is.
- switching the first opening to venting causes Switching of the auxiliary connecting lines, for which the changeover valve via a Switch line is connected to the first opening.
- Fig. 1 shows the basic structure of a pneumatic valve in a schematic Presentation. This serves to regulate the volume flow 1 of a working gas from a supply device, not shown, with a supply gas pressure provided.
- the volume flow 1 passes through an adjusting throttle 2 and pneumatic orifice 3, connected in series by volume flow 1 be run through.
- the order of the variable throttle 2 and the diaphragm 3 is included any.
- control element 4 is seen on the one in the direction of movement Side over an auxiliary connection line 6 with the gas pressure in front of the orifice 3 and over an auxiliary connection line 7 is pressurized with the gas pressure after the orifice 3, seen in the flow direction. Consequently, the one occurring at the aperture 3 acts Gas pressure difference on the control element 4 and moves it until the Counterforce 5 is so great that the sum of those acting on the control element 4 Forces is zero.
- the connection 5a between the control element 4 and the Adjusting throttle 2 is intended to schematically indicate an adjustment of the volume flow 1.
- FIG. 2 shows the pneumatic valve according to FIG. 1 additionally with a changeover valve 8, that swaps the auxiliary connecting lines 6, 7 when the pneumatic valve with reverse flow direction is operated.
- Fig. 3 shows a further auxiliary connection line 9, which the switching valve 8 with a Feed line 9a of the volume flow 1 connects, either on gas pressure and on Venting is switchable (not shown in Fig. 3).
- FIG. 4 shows an embodiment of the pneumatic valve according to FIG. 3, which as Metal block 10 is formed from an aluminum alloy and is in a first Operating mode.
- the metal block 10 has a first opening 11, which is shown in FIG. 4 the first operating mode serves as an inlet opening for the volume flow 1 of the working gas.
- a second opening 12 as Outlet opening both openings 11, 12 are via a main connecting line 13 connected with each other.
- the opening 11 leads through a through the metal block 10 and through the Main connecting line 13 transverse opening 14 in the form of a cylindrical Through hole.
- the main connecting line 13 opens in the area of the transverse opening 14 in each case in two ring channels 15, 16 arranged parallel to one another. Both ring channels 15, 16 are connected via the transverse opening 14.
- the control element 4 in the form of a cylindrical control piston inserted, which is made of plastic.
- the control element 4 is almost slidably in the transverse opening 14 and seals the Main connecting line 13 from airtight to the outside.
- the control element 4 is slidable between two end positions within the transverse opening 14, one of the two end positions by a left boundary 17 and the other by one right boundary 18 is formed.
- the control element 4 points in the area of Ring channels 15, 16 in the jacket longitudinally molded recesses 19, the cooperating with a web 19a form the control opening, so that Flow working gas through the recesses 19 from the ring channel 15 into the ring channel 16 can. From there it arrives at a pneumatic diaphragm 20 and through its opening 21 through to the second opening 12, where it exits the pneumatic valve.
- the effective diaphragm surface 21 of the diaphragm 20 can be through a steep cylinder 22 with a conically tapered tip, which by the Aperture 20 is inserted through leaving an annular gap.
- the auxiliary connection line 6 begins before the panel 20 and after the transverse opening 14, is guided over the changeover valve 8 and opens out in relation to FIG. 4 on the left Side in the transverse opening 14. Behind the panel 20, the auxiliary connection line begins 7, runs through the changeover valve 8 to the transverse opening 14, where it is shown in FIG right side opens into the transverse opening 14.
- the transverse opening 14 is through Closure elements 23 are closed gas-tight to the outside.
- control element 4 is in the first end position (limitation 17) facing side via the auxiliary connecting line 6 with the front of the panel 20th located part of the main connecting line 13 on which the second End position (limitation 18) facing side via the main connecting line 13 with the part of the main connecting line 13 located behind the panel 20 missing gas pressure difference before and behind the orifice 20, the control element 4 is present the boundary 17 and the control opening has the largest provided Opening cross-section.
- the control element is used with increasing pressure difference, i.e.
- control element moves along the transverse opening 14 with respect to 4 to the right, namely against the elastic counterforce of the coil spring 4a, which is effective in the direction of the second end position (limitation 18). Thereby reduced the opening cross-section of the control opening.
- the control opening is designed that the effective opening cross-section starting from the first end position (Limitation 17) steadily as control element 4 moves further, here decreases linearly. In this way, the opening cross section becomes dependent on the gas pressure difference and controlled after the aperture 20.
- the volume flow 1 results in a simple manner from the effective aperture area 21, the characteristic of the coil spring 4a and the opening cross section of the Control 4.
- Fig. 5 shows the control element 4 in the form of a cylindrical control piston in one Longitudinal and a cross section. It can be seen from both cuts that the Control opening 19a by means of in the outer surface of the control piston in the Longitudinal direction is formed in the form of V-grooves. In Fig. 5 there are two V-grooves intended; however, a large number of V-grooves 24 can also be used.
- the longitudinal section in Fig. 5 shows that the depth of the V-grooves to the second end position (Limitation 18) increases steadily, namely linearly.
- the side faces of the V-grooves 24 form a right triangle here.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
- Multiple-Way Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
- Fig. 1
- eine schematische Darstellung des Pneumatikventils,
- Fig. 2
- das Pneumatikventil gemäß Fig. 1 mit Umschaltventil,
- Fig. 3
- das Pneumatikventil gemäß Fig. 2 mit selbsttätiger Umschaltung des Umschaltventils,
- Fig. 4
- ein Pneumatikventil gemäß Fig. 3 in einem Querschnitt,
- Fig. 5
- das Steuerelement als Steuerkolben in einem Längs- und einem Querschnitt.
- 1
- Volumenstrom
- 2
- Verstelldrossel
- 3
- Blende
- 4
- Steuerelement
- 4a
- Schraubenfeder
- 5
- Gegenkraft
- 5a
- Verbindung
- 6
- Hilfsverbindungsleitung
- 7
- Hilfsverbindungsleitung
- 8
- Umschaltventil
- 9
- Hilfsverbindungsleitung
- 10
- Metallblock
- 11
- Öffnung
- 12
- Öffnung
- 13
- Hauptverbindungsleitung
- 14
- Queröffnung
- 15
- Ringkanal
- 16
- Ringkanal
- 17
- Begrenzung
- 18
- Begrenzung
- 19
- Vertiefung
- 19a
- Steg
- 20
- Blende
- 21
- Öffnung
- 22
- Stellzylinder
- 23
- Verschlusselement
- 24
- V-Nut
Claims (14)
- Pneumatikventil, insbesondere zur Verwendung in einem pneumatischen Hubantrieb, zur Regelung des Volumenstroms eines Arbeitsgases, das von einer Versorgungseinrichtung mit einem Versorgungsgasdruck bereitgestellt ist, mit einer ersten und einer zweiten Öffnung zum Eintritt und Austritt des Arbeitsgases, die miteinander verbunden sind über eine Hauptverbindungsleitung,
in der sich hintereinandergeschaltet eine Verstelldrossel und eine pneumatische Blende befinden,
dadurch gekennzeichnet, dass die Verstelldrossel (2) eine quer durch die Hauptverbindungsleitung (13) verlaufende Queröffnung (14) aufweist, in der zwischen einer ersten und einer zweiten Endstellung ein zumindest in Richtung der zweiten Endstellung gegen eine elastische Gegenkraft (5) hin- und herbewegbares Steuerelement angeordnet ist, das eine Steueröffnung für das Arbeitsgas aufweist,
deren effektiver Öffnungsquerschnitt ausgehend von der ersten Endstellung mit Weiterbewegung des Steuerelements stetig abnimmt,
dass das Steuerelement (4) in Bewegungsrichtung gesehen auf der der ersten Endstellung zugewandten Seite des Steuerelements mit dem Gasdruck vor der Blende (3) und auf der der zweiten Endstellung zugewandten Seite des Steuerelements mit dem Gasdruck nach der Blende (3) beaufschlagt ist, um den Öffnungsquerschnitt abhängig von der Gasdruckdifferenz vor und nach der Blende (3) zu steuern. - Pneumatikventil nach Anspruch 1,
dadurch gekennzeichnet, dass die Queröffnung (14) eine zylindrische Durchgangsbohrung und das Steuerelement (4) ein zu dieser korrespondierender zylindrischer Steuerkolben aus Kunststoff ist. - Pneumatikventil nach Anspruch 2,
dadurch gekennzeichnet, dass der Steuerkolben nahezu reibungsfrei in der Durchgangsbohrung verschiebbar ist. - Pneumatikventil nach einem der Ansprüche 2 - 3,
dadurch gekennzeichnet, dass die erste Endstellung mittels einer Begrenzung (17) in der Durchgangsbohrung gebildet ist. - Pneumatikventil nach einem der Ansprüche 1 - 4,
dadurch gekennzeichnet, dass die elastische Gegenkraft (5) mittels eines elastischen Elements gebildet ist. - Pneumatikventil nach Anspruch 5,
dadurch gekennzeichnet, dass das elastische Element eine Schraubenfeder (4a) ist. - Pneumatikventil nach einem der Ansprüche 2 -6,
dadurch gekennzeichnet, dass der Steuerkolben bei fehlender Gasdruckdifferenz an der Begrenzung (17) anliegt und die Steueröffnung den größten vorgesehenen Öffnungsquerschnitt aufweist. - Pneumatikventil nach einem der Ansprüche 2 - 7,
dadurch gekennzeichnet, dass die Hauptverbindungsleitung (13) zwei parallele Ringkanäle (15, 16) aufweist, die über die Steueröffnung miteinander verbindbar sind. - Pneumatikventil nach einem der Ansprüche 2 - 8,
dadurch gekennzeichnet, dass die Steueröffnung mittels in der Mantelfläche längs des Steuerkolbens vorgesehene V-Nuten (24) gebildet ist. - Pneumatikventil nach 9,
dadurch gekennzeichnet, dass jede Seitenfläche der V-Nuten (24) ein Dreieck ist. - Pneumatikventil nach einem der Ansprüche 1 - 10,
dadurch gekennzeichnet, dass durch die Blende (3) zur Einstellung der effektiven Blendenfläche ein Stellzylinder (22) mit konisch verjüngter Spitze hindurchgesteckt ist. - Pneumatikventil nach einem der Ansprüche 1 - 11,
dadurch gekennzeichnet, dass das Steuerelement (4) auf der der ersten Endstellung zugewandten Seite über eine erste Hilfsverbindungsleitung (6) mit dem unmittelbar vor der Blende (3) gelegenen Teil der Hauptverbindungsleitung (13) und auf der der zweiten Endstellung zugewandten Seite über eine zweite Hilfsverbindungsleitung (7) mit dem unmittelbar hinter der Blende (3) gelegenen Teil der Hauptverbindungsleitung (13) verbunden ist. - Pneumatikventil nach Anspruch 12,
dadurch gekennzeichnet, dass die Anschlüsse der beiden Hilfsverbindungsleitungen (6, 7) mittels eines Umschaltventils (8) derart umschaltbar sind, dass die erste Hilfsverbindungsleitung (6) mit dem unmittelbar hinter der Blende (3) gelegenen Teil der Hauptverbindungsleitung (13) und die zweite Hilfsverbindungsleitung (7) mit dem unmittelbar vor der Blende (3) gelegenen Teil der Hauptverbindungsleitung (13) verbunden ist, und dass zusätzlich die erste Öffnung (11) vom Versorgungsgasdruck auf Entlüftung umschaltbar ist. - Pneumatikventil nach Anspruch 13,
dadurch gekennzeichnet, dass das Umschaltventil (8) derart geschaltet ist, dass bei Umschaltung der ersten Öffnung (11) auf Entlüftung eine Umschaltung der Hilfsverbindungsleitungen (6, 7) erfolgt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10123157 | 2001-04-27 | ||
DE10123157A DE10123157C1 (de) | 2001-04-27 | 2001-04-27 | Pneumatikventil |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1253326A2 true EP1253326A2 (de) | 2002-10-30 |
EP1253326A3 EP1253326A3 (de) | 2004-02-18 |
EP1253326B1 EP1253326B1 (de) | 2005-08-10 |
Family
ID=7684560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02090158A Expired - Fee Related EP1253326B1 (de) | 2001-04-27 | 2002-04-29 | Pneumatikventil |
Country Status (4)
Country | Link |
---|---|
US (1) | US6729346B2 (de) |
EP (1) | EP1253326B1 (de) |
JP (1) | JP2003035377A (de) |
DE (2) | DE10123157C1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2896833A1 (fr) * | 2006-01-30 | 2007-08-03 | Coval Soc Par Actions Simplifi | Dispositif de commande d'un circuit consommateur de gaz comprime et generateur de vide faisant application |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050183776A1 (en) * | 2004-02-23 | 2005-08-25 | Gerald Matranga | Pressure regulator |
WO2006110128A1 (en) * | 2005-04-08 | 2006-10-19 | Twin Disc, Incorporated | Pressure regulator |
DE102005055894A1 (de) * | 2005-11-22 | 2007-05-31 | Thyssenkrupp Presta Steertec Gmbh | Schwingungsgedämpftes Proportionalventil |
EP2021892B1 (de) | 2006-04-27 | 2013-02-20 | Sko Flo Industries, Inc. | Stromventil |
EP2021744A4 (de) * | 2006-04-28 | 2015-09-02 | Sko Flo Ind Inc | Strömungsmesser |
EP2625579B8 (de) * | 2010-10-05 | 2019-07-10 | Sko Flo Industries, Inc. | Durchflussregler für hohe strömungsraten und hohe druckabfälle |
WO2016178889A1 (en) * | 2015-05-01 | 2016-11-10 | Graco Minnesota Inc. | Pneumatic timing valve |
CN106195327B (zh) * | 2016-08-17 | 2018-07-03 | 浙江利百加泵阀科技有限公司 | 气动截止换向阀 |
EP3597939B1 (de) * | 2018-07-20 | 2022-04-13 | Hamilton Sundstrand Corporation | Servoventil |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29802606U1 (de) | 1998-02-16 | 1998-04-23 | Zasche Fördertechnik GmbH, 86720 Nördlingen | Handgesteuertes Hebegerät mit einem pneumatischen Hubantrieb |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE500790C (de) * | 1929-01-05 | 1930-06-28 | Ludwig Sautter Dr Ing | Membrangasdruckregler |
US2495785A (en) | 1945-01-11 | 1950-01-31 | Hydraulic Equipment Company | Lowering valve |
GB809651A (en) * | 1954-12-22 | 1959-02-25 | Keelavite Co Ltd | Fluid flow control apparatus |
US2990847A (en) | 1959-05-25 | 1961-07-04 | Marquardt Corp | Fluid flow regulator |
DE1206610B (de) * | 1962-05-26 | 1965-12-09 | Karl Marx Stadt Ind Werke | Vorrichtung zur Regelung der Durchflussmenge in entgegengesetzten Stroemungsrichtungen |
GB1001407A (en) * | 1963-01-04 | 1965-08-18 | Pneumatic Components Ltd | Improvements in or relating to apparatus for dispensing air or other gas |
US3554222A (en) | 1968-06-04 | 1971-01-12 | Mitsubishi Heavy Ind Ltd | Automatic flow control valve |
US3773083A (en) * | 1972-03-28 | 1973-11-20 | Kemp Ind Inc | Hydraulic control apparatus |
US3770007A (en) * | 1972-04-21 | 1973-11-06 | Int Harvester Co | Dual direction flow control valve |
US3807443A (en) * | 1972-12-08 | 1974-04-30 | Sperry Rand Corp | Power transmission |
US4422470A (en) * | 1982-07-01 | 1983-12-27 | The Cessna Aircraft Company | Flow limiting valve |
US4694852A (en) * | 1985-01-22 | 1987-09-22 | Fsi Corporation | Flow regulating valve for controlling the flow of corrosive fluids |
US5027919A (en) * | 1989-12-29 | 1991-07-02 | Young & Franklin, Inc. | Fluid friction controller |
US5097863A (en) * | 1991-06-05 | 1992-03-24 | Mccann's Engineering And Manufacturing Co. | Flow control apparatus |
US6098647A (en) | 1996-02-28 | 2000-08-08 | Beringer-Hydraulik Ag | Load-holding brake valve |
US5913328A (en) * | 1997-09-15 | 1999-06-22 | Taube; John D. | Flow control valve with one piece plug/valve tube sleeve assembly |
-
2001
- 2001-04-27 DE DE10123157A patent/DE10123157C1/de not_active Expired - Fee Related
- 2001-07-30 US US09/918,192 patent/US6729346B2/en not_active Expired - Fee Related
-
2002
- 2002-04-29 EP EP02090158A patent/EP1253326B1/de not_active Expired - Fee Related
- 2002-04-29 DE DE50203854T patent/DE50203854D1/de not_active Expired - Lifetime
- 2002-04-30 JP JP2002128078A patent/JP2003035377A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29802606U1 (de) | 1998-02-16 | 1998-04-23 | Zasche Fördertechnik GmbH, 86720 Nördlingen | Handgesteuertes Hebegerät mit einem pneumatischen Hubantrieb |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2896833A1 (fr) * | 2006-01-30 | 2007-08-03 | Coval Soc Par Actions Simplifi | Dispositif de commande d'un circuit consommateur de gaz comprime et generateur de vide faisant application |
WO2007088262A1 (fr) * | 2006-01-30 | 2007-08-09 | Coval | Dispositif de commande d'un circuit consommateur de gaz comprime et generateur de vide faisant application |
Also Published As
Publication number | Publication date |
---|---|
DE10123157C1 (de) | 2002-11-14 |
US6729346B2 (en) | 2004-05-04 |
US20020157709A1 (en) | 2002-10-31 |
JP2003035377A (ja) | 2003-02-07 |
EP1253326A3 (de) | 2004-02-18 |
DE50203854D1 (de) | 2005-09-15 |
EP1253326B1 (de) | 2005-08-10 |
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