EP1277517B1 - Selector valve for a high pressure gun - Google Patents

Selector valve for a high pressure gun Download PDF

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Publication number
EP1277517B1
EP1277517B1 EP02014612A EP02014612A EP1277517B1 EP 1277517 B1 EP1277517 B1 EP 1277517B1 EP 02014612 A EP02014612 A EP 02014612A EP 02014612 A EP02014612 A EP 02014612A EP 1277517 B1 EP1277517 B1 EP 1277517B1
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EP
European Patent Office
Prior art keywords
valve
pressure
spray gun
outlet
selector valve
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.)
Expired - Lifetime
Application number
EP02014612A
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German (de)
French (fr)
Other versions
EP1277517A1 (en
Inventor
Burkhard Helmig
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.)
Paul Hammelmann Maschinenfabrik GmbH
Hammelmann Maschinenfabrik GmbH
Original Assignee
Paul Hammelmann Maschinenfabrik GmbH
Hammelmann Maschinenfabrik GmbH
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Publication date
Application filed by Paul Hammelmann Maschinenfabrik GmbH, Hammelmann Maschinenfabrik GmbH filed Critical Paul Hammelmann Maschinenfabrik GmbH
Publication of EP1277517A1 publication Critical patent/EP1277517A1/en
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Publication of EP1277517B1 publication Critical patent/EP1277517B1/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0423—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material for supplying liquid or other fluent material to several spraying apparatus
    • 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
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust

Definitions

  • the present invention relates to a changeover valve for a high-pressure spray gun.
  • Switching valves of this type are preferably used where there are several High pressure spray guns are connected to a common pump. Since at Switch off one of the connected high pressure spray guns to operate the others the pressure must be maintained is the excess flow of the shutdown To discharge consumer current via a throttle valve.
  • the present invention is therefore based on the object of a changeover valve to develop the absolutely safe operation of the high pressure spray gun all in the non-use position, permanently enabled and its service life essential is improved.
  • This constructive training means that the hand-held can be switched off safely High pressure spray gun, avoiding an unwanted switching on as well as one mutual influence when switching on and off further high pressure spray guns, which are fed by a common pump, guaranteed.
  • the throttle In contrast to the prior art, the throttle consists exclusively of fixed components positioned relative to one another, being stationary by means of a sleeve Pin, which is mounted with play in the sleeve, a throttle gap is formed, through which the input pressure, i.e. the pump pressure, is reduced so much that the medium can be led from the drain practically without pressure.
  • the Pressure energy converted into heat energy, so that the exiting from the drain Medium, usually water, with a temperature of 90 ° and more, at an inlet pressure of around 3000 bar.
  • the drain valve actuated in the sense of opening, wherein a drain channel is opened, both with the throttle and with the high-pressure spray gun and is also operatively connected to the drain.
  • the pressure-reduced medium Since, as mentioned, the pressure-reduced medium has a very high temperature, becomes the pressure hose of the high-pressure spray gun, which is usually made of plastic protected. The lifespan of this pressure hose is thereby significantly increased.
  • Both the check valve and the check valve have a spring-loaded Tappet with which the assigned channel can be blocked.
  • the throttle gap of the throttle as well as the valves are adjustable and the respective Requirements, particularly adaptable to the respective pump pressure.
  • the safety of the changeover valve is achieved by the invention or the operation of the high pressure spray gun significantly improved. This counts also that by slight pressure changes when switching the Multiple connections no significant recoil changes occur as before. This not only increases the service life of the corresponding components of the changeover valve, but also the safety of the operator of the high pressure spray gun.
  • valve 1 shows a changeover valve for a high-pressure spray gun, which has a valve housing 16 on which a pump connection 1 is provided, and a check valve 3, a throttle 4, an outlet 6, a drain 8 and an electric actuatable outlet valve 9.
  • a check valve 5 is also provided in the area of the outlet 6.
  • the throttle 4 is connected to the first section 13 in a liquid-permeable manner, as well as with a drain channel 15 which opens into the drain 8.
  • FIG. 2 shows the function when the high-pressure spray gun is switched off.
  • an electrical switch 7 is turned off, with which a pneumatic Valve 11, which is operatively connected to the outlet valve 9, can be actuated is.
  • the pressurized medium is passed through the throttle 4 while simultaneously Reduction of the pressure Outlet channel 15 and the open outlet valve 9 led to the drain 8.
  • the check valve 5 shuts off the connecting channel 12 and prevents unpressurized, heated by the pressure reduction medium reaches the outlet 6.

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  • Nozzles (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

The switching valve has a pump connector (1), connecting channel (12) with two sections (13, 14) leading to a high-pressure outlet (6), a locking valve (3) between the two sections, a throttle (4) linked to the first section, an outlet channel (15) to a drain (8) and an outlet valve (9), to block the outlet channel when the gun is switched on.

Description

Die vorliegende Erfindung betrifft ein Umschaltventil für eine Hochdruck-Spritzpistole.The present invention relates to a changeover valve for a high-pressure spray gun.

Derartige Umschaltventile finden vorzugsweise dort Verwendung, wo mehrere Hochdruck-Spritzpistolen an eine gemeinsame Pumpe angeschlossen sind. Da beim Ausschalten einer der angeschlossenen Hochdruck-Spritzpistolen zum Betrieb der anderen der Druck erhalten werden muß, ist die überschüssige Fördermenge des abgeschalteten Verbraucherstroms über ein Drosselventil abzuführen.Switching valves of this type are preferably used where there are several High pressure spray guns are connected to a common pump. Since at Switch off one of the connected high pressure spray guns to operate the others the pressure must be maintained is the excess flow of the shutdown To discharge consumer current via a throttle valve.

Um dies zu erreichen, ist es bekannt, in dem Umschaltventil einen Steuerschieber anzuordnen, über den der überschüssige Förderstrom auf das Drosselventil geleitet wird.To achieve this, it is known to have a spool in the changeover valve to arrange, via which the excess flow is directed to the throttle valve becomes.

Aufgrund des hohen Betriebsdrucks, der bis 3000 bar beträgt, und der Schaltbewegungen wird der Steuerschieber äußerst beansprucht, wobei es zu erheblichen Verschleißerscheinungen kommt, beispielsweise dem sogenannten Fressen, was die Funktionsfähigkeit des Steuerschiebers zumindest einschränkt,Because of the high operating pressure, which is up to 3000 bar, and the switching movements the spool is extremely stressed, causing significant signs of wear comes, for example the so-called eating what the Functionality of the control spool is at least restricted,

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein Umschaltventil zu entwickeln, das einen absolut sicheren Betrieb der Hochdruck-Spritzpistole, vor allem in Nichtgebrauchsstellung, dauerhaft ermöglicht und dessen Standzeit wesentlich verbessert ist.The present invention is therefore based on the object of a changeover valve to develop the absolutely safe operation of the high pressure spray gun all in the non-use position, permanently enabled and its service life essential is improved.

Diese Aufgabe wird durch ein Umschaltventil gelöst, das die Merkmale des Anspruchs 1 aufweist.This object is achieved by a changeover valve which has the features of the claim 1 has.

Durch diese konstruktive Ausbildung ist ein sicheres Abschalten der handgeführten Hochdruck-Spritzpistole, ein Vermeiden eines ungewollten Einschaltens sowie einer gegenseitigen Beeinflussung beim Ein- und Ausschalten weiterer Hochdruck-Spritzpistolen, die durch eine gemeinsame Pumpe gespeist werden, garantiert.This constructive training means that the hand-held can be switched off safely High pressure spray gun, avoiding an unwanted switching on as well as one mutual influence when switching on and off further high pressure spray guns, which are fed by a common pump, guaranteed.

Die Drossel besteht im Gegensatz zum Stand der Technik ausschließlich aus fest zueinander positionierten Bauteilen, wobei durch einen gegenüber einer Hülse ortsfesten Zapfen, der mit Spiel in der Hülse gelagert ist, ein Drosselspalt gebildet wird, durch den der Eingangs- also der Pumpendruck so weit reduziert wird, daß das Medium praktisch drucklos aus dem Abflluß geführt werden kann. Dabei wird die Druckenergie in Wärmeenergie umgewandelt, so daß das aus dem Abfluß austretende Medium, üblicherweise Wasser, mit einer Temperatur von 90° und mehr austritt, bei einem Eingangsdruck von etwa 3000 bar.In contrast to the prior art, the throttle consists exclusively of fixed components positioned relative to one another, being stationary by means of a sleeve Pin, which is mounted with play in the sleeve, a throttle gap is formed, through which the input pressure, i.e. the pump pressure, is reduced so much that the medium can be led from the drain practically without pressure. The Pressure energy converted into heat energy, so that the exiting from the drain Medium, usually water, with a temperature of 90 ° and more, at an inlet pressure of around 3000 bar.

Zur Zuführung des unter Eingangsdruck stehenden Mediums in die Drossel wird mittels eines elektrischen Schalters, der üblicherweise am Griff der Hochdruck-Spritzpistole angeordnet ist, das Ablaßventil im Sinne eines Öffnens betätigt, wobei ein Ablaßkanal geöffnet wird, der sowohl mit der Drossel als auch mit der Hochdruck-Spritzpistole als auch mit dem Abfluß in Wirkverbindung steht. To feed the medium under inlet pressure into the throttle by means of an electrical switch, which is usually on the handle of the high-pressure spray gun is arranged, the drain valve actuated in the sense of opening, wherein a drain channel is opened, both with the throttle and with the high-pressure spray gun and is also operatively connected to the drain.

Gleichzeitig mit der Öffnung des Auslaßventiles erfolgt ein Druckabfall des innerhalb des Umschaltventiles geführten Mediums, durch den ein Sperrventil betätigt wird, mit dem eine erste Teilstrecke von einer zweiten Teilstrecke eines Verbindungskanales absperrbar ist, durch den bei geschlossener Stellung des Auslaßventiles das unter Druck stehende Medium vom Pumpenanschluß zur Spritzpistole geführt wird.Simultaneously with the opening of the outlet valve, there is a pressure drop within of the switching valve guided medium through which a check valve is actuated with which a first section of a second section of a connecting channel can be shut off by the when the exhaust valve is in the closed position the pressurized medium is led from the pump connection to the spray gun becomes.

Durch diese Absperrung wird das unter hohem Druck stehende Medium durch die Drossel geführt, sein Druck dort reduziert und über den Abfluß ausgeführt.Through this shut-off, the medium under high pressure is discharged through the Throttle led, its pressure reduced there and executed via the drain.

Um zu verhindern, daß das insoweit drucklose, durch die Drosselung jedoch heiße Medium über die zweite Teilstrecke des Verbindungskanales in die Hochdruck-Spritzpistole gelangt, ist im Bereich dieser zweiten Teilstrecke ein Rückschlagventil angeordnet, das abhängig vom Mediendruck die zweite Teilstrecke verschließt.In order to prevent this from being called unpressurized in this respect, but due to the throttling Medium over the second section of the connecting channel into the high-pressure spray gun arrives, there is a check valve in the area of this second section arranged, which closes the second section depending on the media pressure.

Da, wie erwähnt, das druckreduzierte Medium eine sehr hohe Temperatur aufweist, wird somit der normalerweise aus Kunststoff bestehende Druckschlauch der Hochdruck-Spritzpistole geschützt. Die Lebensdauer dieses Druckschlauches wird dadurch wesentlich erhöht.Since, as mentioned, the pressure-reduced medium has a very high temperature, becomes the pressure hose of the high-pressure spray gun, which is usually made of plastic protected. The lifespan of this pressure hose is thereby significantly increased.

Sowohl das Sperrventil, als auch das Rückschlagventil weisen einen federbelasteten Stößel auf, mit dem der jeweils zugeordnete Kanal absperrbar ist.Both the check valve and the check valve have a spring-loaded Tappet with which the assigned channel can be blocked.

Der Drosselspalt der Drossel ebenso wie die Ventile sind einstellbar und den jeweiligen Erfordernissen, insbesondere hinsichtlich des jeweiligen Pumpendrucks anpaßbar.The throttle gap of the throttle as well as the valves are adjustable and the respective Requirements, particularly adaptable to the respective pump pressure.

Wie beschrieben, wird durch die Erfindung die Sicherheit des Umschaltventiles bzw. der Betrieb der Hochdruck-Spritzpistole wesentlich verbessert. Hierzu zählt auch, daß durch geringe Druckänderungen bei einem Nacheinanderschalten der Mehrfachanschlüsse keine nennenswerten Rückstoßänderungen auftreten wie bisher. Dies erhöht nicht nur die Lebensdauer der entsprechenden Bauteile des Umschaltventiles, sondern auch die Sicherheit des die Hochdruck-Spritzpistole Bedienenden.As described, the safety of the changeover valve is achieved by the invention or the operation of the high pressure spray gun significantly improved. This counts also that by slight pressure changes when switching the Multiple connections no significant recoil changes occur as before. This not only increases the service life of the corresponding components of the changeover valve, but also the safety of the operator of the high pressure spray gun.

Weitere vorteilhafte Ausbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Further advantageous developments of the invention are characterized in the subclaims.

Ein Ausführungsbeispiel sowie die Funktionsweise des erfindungsgemäßen Umschaltventiles wird nachfolgend anhand der beigefügten Zeichnungen beschrieben.An embodiment and the operation of the changeover valve according to the invention will be described below with reference to the accompanying drawings.

Es zeigen:

Figur 1
ein erfindungsgemäßes Umschaltventil in einer Seitenansicht,
Figur 2
einen Schaltplan des Umschaltventiltes.
Show it:
Figure 1
an inventive switching valve in a side view,
Figure 2
a circuit diagram of the switching valve.

In der Figur 1 ist ein Umschaltventil für eine Hochdruck-Spritzpistole dargestellt, das ein Ventilgehäuse 16 aufweist, an dem ein Pumpenanschluß 1 vorgesehen ist, sowie ein Sperrventil 3, eine Drossel 4, ein Auslaß 6, ein Abfluß 8 sowie ein elektrisch betätigbares Auslaßventil 9.1 shows a changeover valve for a high-pressure spray gun, which has a valve housing 16 on which a pump connection 1 is provided, and a check valve 3, a throttle 4, an outlet 6, a drain 8 and an electric actuatable outlet valve 9.

Im Bereich des Auslasses 6 ist überdies ein Rückschlagventil 5 vorgesehen.A check valve 5 is also provided in the area of the outlet 6.

In der Figur 2 ist zu erkennen, daß durch das Sperrventil 3 ein Verbindungskanal 13, über den ein Mediendurchfluß von einer Pumpe 2 über den Pumpenanschluß 1 hin zum Auslaß 6 erfolgt, absperrbar ist, wobei der Verbindungskanal 12 aus einer ersten Teilstrecke 13 und einer zweiten Teilstrecke 14 besteht, zwischen denen das Sperrventil 3 angeordnet ist. Die erste Teilstrecke 13 schließt sich an den Pumpenanschluß 1 an, während die zweite Teilstrecke 14 am Auslaß 6 endet. Bei einem Ausschalten der Hochdruck-Spritzpistole wird der Mediendurchfluß zwischen der ersten Teilstrecke 13 und der zweiten Teilstrecke 14 abgesperrt. In Figure 2 it can be seen that through the check valve 3, a connecting channel 13, via which a media flow from a pump 2 via the pump connection 1 towards the outlet 6, can be shut off, the connecting channel 12 from a first section 13 and a second section 14, between which the Check valve 3 is arranged. The first section 13 connects to the pump connection 1, while the second section 14 ends at the outlet 6. At a Turning off the high pressure spray gun will reduce the media flow between the the first section 13 and the second section 14 cordoned off.

Die Drossel 4 ist mit der ersten Teilstrecke 13 flüssigkeitsdurchlässig verbunden, ebenso wie mit einem Ablaßkanal 15, der in den Abfluß 8 mündet.The throttle 4 is connected to the first section 13 in a liquid-permeable manner, as well as with a drain channel 15 which opens into the drain 8.

Dieser ist bei Einschalten der Hochdruck-Spritzpistole durch das Auslaßventil 9 absperrbar.This can be shut off by the outlet valve 9 when the high-pressure spray gun is switched on.

Die Figur 2 zeigt die Funktion bei ausgeschalteter Hochdruck-Spritzpistole. Dabei ist zu erkennen, daß ein elektrischer Schalter 7 ausgeschaltet ist, mit dem ein pneumatisches Ventil 11, das mit dem Auslaßventil 9 in Wirkverbindung steht, betätigbar ist.FIG. 2 shows the function when the high-pressure spray gun is switched off. there can be seen that an electrical switch 7 is turned off, with which a pneumatic Valve 11, which is operatively connected to the outlet valve 9, can be actuated is.

Durch die in diesem Fall offene Stellung des Auslaßventiles 9 erfolgt ein Schließen des Sperrventiles 3, durch den der Durchfluß des Verbindungskanales 12 unterbrochen wird.Due to the open position of the outlet valve 9 in this case, the valve closes of the check valve 3 through which the flow of the connecting channel 12 is interrupted becomes.

Das unter Druck stehende Medium wird durch die Drossel 4 geführt unter gleichzeitiger Reduzierung des Drucks. Das insoweit drucklose Medium wird über den Abgangskanal 15 und das offene Auslaßventil 9 zum Abfluß 8 geführt.The pressurized medium is passed through the throttle 4 while simultaneously Reduction of the pressure Outlet channel 15 and the open outlet valve 9 led to the drain 8.

Das Rückschlagventil 5 sperrt den Verbindungskanal 12 ab und verhindert, daß druckloses, durch die Druckreduzierung erhitztes Medium in den Auslaß 6 gelangt.The check valve 5 shuts off the connecting channel 12 and prevents unpressurized, heated by the pressure reduction medium reaches the outlet 6.

Bei Betätigung des elektrischen Schalters 7 erfolgt über das Pneumatikventil 11 ein Verschließen des Auslaßventiles 9, wodurch sich in dem dann abgesperrten Abgangskanal 14 ein Druck aufbaut, durch den das Sperrventil 3 im Sinne eines Öffnens betätigt wird, so daß ein Mediendurchfluß durch den Verbindungskanal 12 möglich ist, wobei das Rückschlagventil 5 aufgrund des herrschenden Betriebsdrucks ebenfalls geöffnet sowie die Drossel 4 umgangen wird. When the electrical switch 7 is actuated via the pneumatic valve 11 Closing the outlet valve 9, resulting in the then closed outlet channel 14 builds up a pressure through which the check valve 3 in the sense of opening is actuated so that a media flow through the connecting channel 12th is possible, the check valve 5 due to the prevailing operating pressure is also opened and the throttle 4 is bypassed.

Anstelle einer pneumatischen ist alternativ eine hydraulische, elektromagnetische oder vergleichbare Betätigung des Auslaßventiles 9 denkbar.Instead of a pneumatic one, there is alternatively a hydraulic, electromagnetic one or comparable actuation of the exhaust valve 9 is conceivable.

Claims (6)

  1. Selector valve for a high-pressure spray gun, with a pump connection (1), an adjoining first subsection (13) of a connecting channel (12), the second subsection (14) of which opens out into a high-pressure outlet (6), a shut-off valve (3), with which the passage between the first subsection (13) and the second subsection (14) can be shut off when the high-pressure spray gun is switched off, a restrictor (4), which is connected in a liquid-passing manner to the first subsection (13) of the connecting charnel (12), an adjoining discharge channel (15), which opens out into an outflow (8) and an outlet valve (9), which can be actuated by means of an electrical switch (7) and by which the discharge channel (15) can be shut off when the high-pressure spray gun is switched on.
  2. Selector valve according to Claim 1, characterized in that a non-return valve (5) is provided, by which the second subsection (14) of the connecting channel (12) can be shut off when the high-pressure spray gun is switched off.
  3. Selector valve according to Claim 1, characterized in that the outlet valve (9) can be actuated pneumatically, hydraulically or electromagnetically.
  4. Selector valve according to Claim 1 or 2, characterized in that the shut-off valve (3) and the non-return valve (5) respectively have a spring-loaded tappet, by which the assigned channels can be closed.
  5. Selector valve according to Claim 1, characterized in that the pressure reduction of the restrictor (4) can be set.
  6. Selector valve according to Claim 1 or 2, characterized in that the valves (3, 5, 9) can be set pressure-dependently.
EP02014612A 2001-07-20 2002-07-02 Selector valve for a high pressure gun Expired - Lifetime EP1277517B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10135563A DE10135563A1 (en) 2001-07-20 2001-07-20 Switch valve for a high pressure spray gun
DE10135563 2001-07-20

Publications (2)

Publication Number Publication Date
EP1277517A1 EP1277517A1 (en) 2003-01-22
EP1277517B1 true EP1277517B1 (en) 2003-10-15

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EP02014612A Expired - Lifetime EP1277517B1 (en) 2001-07-20 2002-07-02 Selector valve for a high pressure gun

Country Status (7)

Country Link
US (1) US20030057295A1 (en)
EP (1) EP1277517B1 (en)
JP (1) JP2003175347A (en)
AT (1) ATE251950T1 (en)
DE (2) DE10135563A1 (en)
DK (1) DK1277517T3 (en)
ES (1) ES2204880T3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8904912B2 (en) 2012-08-16 2014-12-09 Omax Corporation Control valves for waterjet systems and related devices, systems, and methods
US9095955B2 (en) 2012-08-16 2015-08-04 Omax Corporation Control valves for waterjet systems and related devices, systems and methods
CN104500793A (en) * 2014-11-28 2015-04-08 四川航空工业川西机器有限责任公司 Three-level pressure relief system of ultra-high pressure vessel
US11554461B1 (en) 2018-02-13 2023-01-17 Omax Corporation Articulating apparatus of a waterjet system and related technology
CN115698507A (en) 2020-03-30 2023-02-03 海别得公司 Cylinder for liquid injection pump with multifunctional interface longitudinal end
CN113926612B (en) * 2021-11-24 2022-09-13 电子科技大学 High-pressure airless sprayer and control method

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US3672575A (en) * 1971-02-01 1972-06-27 Hydro Services Inc Hydro blast saf-t-gun
US3834621A (en) * 1972-10-13 1974-09-10 Partek Corp Of Houston Fluid delivery system
US3986523A (en) * 1974-10-09 1976-10-19 Partek Corporation Of Houston High pressure fluid system
US3977603A (en) * 1975-10-22 1976-08-31 Partek Corporation Of Houston Fluid delivery system
US4061271A (en) * 1976-10-13 1977-12-06 Kimbrough Wade L Control system for high pressure hydraulic system
NL8501365A (en) * 1985-05-13 1986-12-01 Multinorm Bv METHOD AND APPARATUS FOR SPRAYING A LIQUID
US4858828A (en) * 1986-09-15 1989-08-22 Stachowiak J Edward Multi-gun control valve
US4759504A (en) * 1986-12-30 1988-07-26 Weatherford U.S., Inc. Dump control and valve
DE29619975U1 (en) * 1996-11-16 1997-01-16 BM Anlagenbau und Dosiertechnik GmbH, 32760 Detmold Spray device for the flat application of liquids
DE19727729A1 (en) * 1997-06-30 1999-01-07 Amazonen Werke Dreyer H Switching valve
DE19752291C1 (en) * 1997-11-26 1999-03-25 Uraca Pumpen Overflow valve for hydraulic circuit
US5975429A (en) * 1997-12-23 1999-11-02 J. Edward Stachowiak High pressure fluid apparatus for blast cleaning

Also Published As

Publication number Publication date
EP1277517A1 (en) 2003-01-22
DE10135563A1 (en) 2003-02-06
JP2003175347A (en) 2003-06-24
ES2204880T3 (en) 2004-05-01
ATE251950T1 (en) 2003-11-15
US20030057295A1 (en) 2003-03-27
DK1277517T3 (en) 2004-02-16
DE50200074D1 (en) 2003-11-20

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