EP0927826A1 - Liquid pumping system - Google Patents
Liquid pumping system Download PDFInfo
- Publication number
- EP0927826A1 EP0927826A1 EP98460059A EP98460059A EP0927826A1 EP 0927826 A1 EP0927826 A1 EP 0927826A1 EP 98460059 A EP98460059 A EP 98460059A EP 98460059 A EP98460059 A EP 98460059A EP 0927826 A1 EP0927826 A1 EP 0927826A1
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- Prior art keywords
- orifice
- liquid
- chamber
- valve
- introduction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
- F04F1/02—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped using both positively and negatively pressurised fluid medium, e.g. alternating
Definitions
- the present invention relates to a liquid pumping system.
- Such pumping system can work in pump with various liquids.
- An application such a pumping system can consist of a liquid cannon, such as water, can spray a liquid at a long distance at a controllable rate, for example, to watering crops or as a fire or riot water cannon.
- centrifugal pumps which are coupled to a heat engine.
- the downside of such pumps is that they require relatively high power.
- a centrifugal pump which delivers 1300 liters / minute at a pressure of 12 bars requires engine power thermal which drives it by 120 CV.
- the object of the invention is to propose a pumping system for liquids which allows to considerably reduce this power required for a projection of said liquid, for example in a ratio of 8 to 10.
- a liquid pumping system is characterized in that it consists of a chamber provided with an orifice for introduction into said chamber of a liquid from a source, an orifice for the evacuation of said liquid out from said chamber and from an orifice opposite to said orifice for discharging said liquid to the introduction of gas under pressure, each orifice being provided with a valve, said valves being controlled synchronously in two phases, a first so-called filling phase in which the valve associated with the introduction orifice is open while the other two valves are closed allowing filling of the chamber, and a second phase known as expulsion in which the valve associated with the introduction orifice is closed while the other two valves are open, allowing the introduction of pressurized gas into the chamber through the orifice introduction thus expelling the liquid contained in the chamber through the orifice evacuation.
- said chamber is provided with a vent opposite the liquid introduction orifice, said vent itself being provided a valve which opens and closes at the same time as the valve associated with the orifice liquid introduction.
- said chamber is provided with an orifice connected, via a valve, to a vacuum pump, said valve opening and closing at the same time as the valve associated with the inlet some cash.
- valve associated with the orifice introduction is at the end of said chamber which is provided with the orifice outlet, said vent being at the other end.
- the invention includes means for detection of liquid levels in said chamber, the signals of which are supplied to a control unit designed to be able to control opening and closing of said valves.
- said chamber has, on the side of its discharge orifice, a frustoconical part narrowing towards said orifice evacuation.
- the present invention also relates to a set of pumping systems. conform to a pumping system as just described. According to the invention, it is characterized in that each system is controlled so that the phases of each evacuation system follow one after the other, and that while that of a system is in operation, filling phases are implemented works in other systems.
- the number n of systems of evacuation of said assembly is such that n times the evacuation time corresponds to a filling time.
- the installation shown in FIG. 1 essentially consists of a system pumping device according to the invention 100, a source 20 of a liquid and a pump compression 30 intended to supply a gas under relatively high pressure.
- this gas is air.
- the pumping system 100 visible in this FIG. 1 is essentially made up of a body forming inside it a closed chamber 10, for example but not necessarily cylindrical. Said body 10 is provided with an orifice 11 provided for introducing the liquid from the source 20 into said chamber of the body 10 and an orifice 12 for the evacuation from said chamber of the body 10 of the liquid which it contains. In the embodiment shown, the introduction orifice 11 and the orifice 12 are located in the lower part of the body 10, which has its axis longitudinal which is vertical.
- This body 10 is also provided with an orifice 13 which is opposite to said orifice evacuation of said liquid 12 and which is intended to allow introduction into the body chamber 10 of the high pressure gas supplied by the compression 30.
- the body 10 is also provided with a vent 14 which is opposite to the insertion opening 12.
- the pumping system 100 also includes a valve 15 placed on the pipeline between the source 20 and the introduction orifice 11, a valve 16 placed on the discharge orifice 12, a valve 17 placed on the pipe between the pump 30 and the introduction orifice 13 and a valve 18 placed on the vent 14.
- the valves 15 to 18 are controlled synchronously by means of a control unit 40 which receives moreover, the signals, on the one hand, from a low level detector 42 and, on the other hand, from a high level detector 41.
- the operation of the pumping system 100 according to the invention is as follows.
- a first phase called the filling phase
- the filling phase the filling the chamber of the body 10 with a volume of liquid from the source 20.
- the introduction valve 15 and the vent valve 18 open the introduction valve 15 and the vent valve 18, the valve gas introduction 13 and the discharge valve 16 being closed.
- the resulting liquid of the source 20 enters by gravity into the chamber of the body 10, and this via the orifice 11.
- the filling is done until the liquid reaches the level of high detector 41, which transmits a signal to the control unit 40 which triggers the closing of valves 15 and 18.
- vent 14 is used for the evacuation of the air which is expelled from the chamber of the body 10 by its filling with liquid.
- the valve for introducing gas 17 is open as well as the discharge valve 16. This results in the presence at the surface of the liquid which is opposite to the orifice 12, of a gas pressure given by the pump 30 which has the effect of pressing on this surface and allowing the evacuation of the liquid through port 12. The liquid is expelled and projected in the form of a jet of strong power.
- the second phase begins immediately after the end of the first phase. Consequently, the valves 16 and 17 open immediately. closing of valves 15 and 18.
- the opening of the valve 16 may be slightly delayed by relative to the opening of the valve 17.
- the vent 14 is replaced by an orifice 14 connected, via the valve 18, to a suction pump 50.
- the operation is similar to that of the exemplary embodiment shown in FIG. 1, with the difference that the introduction liquid from the source 20 is no longer made by gravity but by creating a vacuum in the body chamber 10 by means of the suction pump 50.
- detectors 41 and 42 could be replaced by a pressure switch which when the pressure in the body 10 reaches by going up a limit value upper, allows the control of the closing of the valves 15 and 18 and which, when the pressure in the body 10 reached while going down a lower limit value, allows the command to close valves 16 and 17.
- FIG. 3 a body 10 of a pumping system according to the invention with its introduction orifices 11 and 13 and its discharge orifice 12 and its vent (or suction port) 14.
- This body 10 has the particularity of understanding in its lower part, a frustoconical part 10a tightening towards the orifice It was shown that this characteristic was interesting for obtain a fine spray at the end of the jet due to the mixture of water and gas which takes place at the end of evacuation.
- FIG. 4 there is shown an installation with n pumping systems 101 to 10n identical to the first embodiment shown in FIG. 1. It will however be noted that said systems could be identical to the second embodiment of FIG. 2. In this Fig. 4, the valves 15 to 18 of each system 101 to 10n have not been shown for reasons of clarity in FIG. 4.
- the source 20 is therefore connected to the n input inputs 11 of the n pumping systems 101 to 10n, and this via n respective valves 15 (see FIG. 1).
- the compression pump 30 is connected to the n pressurized gas introduction inlets 13 of the n pumping systems 10l to 10n, and this via n respective valves 17 (see FIG. 1) and the n discharge orifices. 12 are connected to an outlet S.
- the vents 14 which are also connected to respective valves 18 (see Fig. 1).
- the control unit 40 controls each system 10i (i which can vary from 1 to n ) in the manner indicated above, that is to say according to two phases, a filling phase I and a discharge phase II , phases which are triggered and interrupted after reception of the level signals from the detectors 41 and 42 of each system 10i.
- the duration of the filling phase I is greater than that of the evacuation phase II.
- the system 101 begins to fill, the system 102 evacuates and the system 103 finishes filling up.
- the system 101 is still filling, the system 102 has finished evacuation and begins to fill and system 103 begins evacuation.
- the system 101 finishes filling up and begins evacuation, system 102 is still filling and system 103 has finished evacuation and begins its filling.
- the evacuation phases II follow one after the other, and that while that of one system is in use, filling phases are implemented in the other systems.
- a number n of systems will be chosen such that n times the duration of the discharge phase II correspond to that of the filling phase I.
- the flow rate at the outlet S is substantially constant.
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- Mechanical Engineering (AREA)
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- Jet Pumps And Other Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
La présente invention concerne un système de pompage de liquide. Un tel système de pompage peut travailler en pompe avec divers liquides. Une application d'un tel système de pompage peut consister en un canon à liquide, tel que de l'eau, pouvant projeter à forte distance un liquide à un rythme contrôlable, par exemple, pour l'arrosage de cultures ou comme canon à eau d'incendie ou anti-émeutes.The present invention relates to a liquid pumping system. Such pumping system can work in pump with various liquids. An application such a pumping system can consist of a liquid cannon, such as water, can spray a liquid at a long distance at a controllable rate, for example, to watering crops or as a fire or riot water cannon.
Pour projeter un liquide, on utilise généralement des pompes centrifuges qui sont couplées à un moteur thermique. L'inconvénient de telles pompes est qu'elles nécessitent une relativement forte puissance. Par exemple, une pompe centrifuge qui débite 1300 litres/minute à une pression de 12 bars demande une puissance du moteur thermique qui l'entraíne de 120 CV.To spray a liquid, we generally use centrifugal pumps which are coupled to a heat engine. The downside of such pumps is that they require relatively high power. For example, a centrifugal pump which delivers 1300 liters / minute at a pressure of 12 bars requires engine power thermal which drives it by 120 CV.
Le but de l'invention est de proposer un système de pompage de liquides qui permette de réduire considérablement cette puissance requise pour une projection dudit liquide, par exemple dans un rapport de 8 à 10.The object of the invention is to propose a pumping system for liquids which allows to considerably reduce this power required for a projection of said liquid, for example in a ratio of 8 to 10.
A cet effet, un système de pompage d'un liquide selon l'invention est caractérisé en ce qu'il est constitué d'une chambre pourvue d'un orifice d'introduction dans ladite chambre d'un liquide issu d'une source, d'un orifice pour l'évacuation dudit liquide hors de ladite chambre et d'un orifice opposé audit orifice d'évacuation dudit liquide pour l'introduction de gaz sous pression, chaque orifice étant pourvu d'une vanne, lesdites vannes étant commandées de manière synchronisée selon deux phases, une première phase dite de remplissage dans laquelle la vanne associée à l'orifice d'introduction est ouverte alors que les deux autres vannes sont fermées permettant ainsi le remplissage de la chambre, et une seconde phase dite d'expulsion dans laquelle la vanne associée à l'orifice d'introduction est fermée alors que les deux autres vannes sont ouvertes, permettant l'introduction du gaz sous pression dans la chambre par l'orifice d'introduction expulsant ainsi le liquide contenu dans la chambre par l'orifice d'évacuation.To this end, a liquid pumping system according to the invention is characterized in that it consists of a chamber provided with an orifice for introduction into said chamber of a liquid from a source, an orifice for the evacuation of said liquid out from said chamber and from an orifice opposite to said orifice for discharging said liquid to the introduction of gas under pressure, each orifice being provided with a valve, said valves being controlled synchronously in two phases, a first so-called filling phase in which the valve associated with the introduction orifice is open while the other two valves are closed allowing filling of the chamber, and a second phase known as expulsion in which the valve associated with the introduction orifice is closed while the other two valves are open, allowing the introduction of pressurized gas into the chamber through the orifice introduction thus expelling the liquid contained in the chamber through the orifice evacuation.
Selon une autre caractéristique de l'invention, ladite chambre est pourvue d'un évent à l'opposé de l'orifice d'introduction du liquide, ledit évent étant lui-même pourvu d'une vanne qui s'ouvre et se ferme en même temps que la vanne associée à l'orifice d'introduction du liquide.According to another characteristic of the invention, said chamber is provided with a vent opposite the liquid introduction orifice, said vent itself being provided a valve which opens and closes at the same time as the valve associated with the orifice liquid introduction.
Selon une autre caractéristique de l'invention alternative à la précédente, ladite chambre est pourvue d'un orifice relié, via une vanne, à une pompe à vide, ladite vanne s'ouvrant et se fermant en même temps que la vanne associée à l'orifice d'introduction du liquide.According to another characteristic of the invention, alternative to the previous one, said chamber is provided with an orifice connected, via a valve, to a vacuum pump, said valve opening and closing at the same time as the valve associated with the inlet some cash.
Selon une autre caractéristique de l'invention, la vanne associée à l'orifice d'introduction se trouve à l'extrémité de ladite chambre qui est pourvue de l'orifice d'évacuation, ledit évent se trouvant à l'autre extrémité.According to another characteristic of the invention, the valve associated with the orifice introduction is at the end of said chamber which is provided with the orifice outlet, said vent being at the other end.
Selon une autre caractéristique de l'invention, il comporte des moyens de détection de niveaux de liquide dans ladite chambre dont les signaux sont fournis à une unité de commande prévue pour pouvoir commander l'ouverture et la fermeture desdites vannes.According to another characteristic of the invention, it includes means for detection of liquid levels in said chamber, the signals of which are supplied to a control unit designed to be able to control opening and closing of said valves.
Selon une autre caractéristique de l'invention, ladite chambre présente, côté de son orifice d'évacuation, une partie tronconique se resserrant vers ledit orifice d'évacuation.According to another characteristic of the invention, said chamber has, on the side of its discharge orifice, a frustoconical part narrowing towards said orifice evacuation.
La présente invention concerne également un ensemble de systèmes de pompage conformes à un système de pompage tel qu'il vient d'être décrit. Selon l'invention, il est caractérisé en ce que chaque système est commandé de manière que les phases d'évacuation de chaque système d'évacuation se suivent les unes après les autres, et que pendant que celle d'un système est en oeuvre, des phases de remplissage sont mises en oeuvre dans les autres systèmes. The present invention also relates to a set of pumping systems. conform to a pumping system as just described. According to the invention, it is characterized in that each system is controlled so that the phases of each evacuation system follow one after the other, and that while that of a system is in operation, filling phases are implemented works in other systems.
Selon une autre caractéristique de cet ensemble, le nombre n de systèmes d'évacuation dudit ensemble est tel que n fois le temps d'évacuation correspondent à un temps de remplissage.According to another characteristic of this set, the number n of systems of evacuation of said assembly is such that n times the evacuation time corresponds to a filling time.
Les caractéristiques de l'invention mentionnées ci-dessus, ainsi que d'autres,
apparaítront plus clairement à la lecture de la description suivante d'un exemple de
réalisation, ladite description étant faite en relation avec les dessins joints, parmi
lesquels :
L'installation représentée à la Fig. 1 est essentiellement constituée d'un système
de pompage selon l'invention 100, d'une source 20 d'un liquide et d'une pompe de
compression 30 destinée à fournir un gaz sous relativement haute pression. Par
exemple, ce gaz est de l'air.The installation shown in FIG. 1 essentially consists of a system
pumping device according to the
Le système de pompage 100 visible sur cette Fig. 1 est essentiellement constitué
d'un corps formant en son intérieur une chambre 10 fermée, par exemple mais pas
nécessairement cylindrique. Ledit corps 10 est pourvu d'un orifice 11 prévu pour
l'introduction du liquide de la source 20 dans ladite chambre du corps 10 et d'un orifice
12 pour l'évacuation hors de ladite chambre du corps 10 du liquide qu'elle contient.
Dans l'exemple de réalisation représenté, l'orifice d'introduction 11 et l'orifice
d'évacuation 12 se trouvent dans la partie inférieure du corps 10, lequel a son axe
longitudinal qui est vertical.The
Ce corps 10 est encore pourvu d'un orifice 13 qui est opposé audit orifice
d'évacuation dudit liquide 12 et qui est prévu pour permettre l'introduction dans la
chambre du corps 10 du gaz sous haute pression fourni par la pompe de
compression 30. This
Le corps 10 est également pourvu d'un évent 14 qui se trouve à l'opposé de
l'orifice d'introduction 12.The
Le système de pompage 100 comporte encore une vanne 15 placée sur la
canalisation entre la source 20 et l'orifice d'introduction 11, une vanne 16 placée sur
l'orifice d'évacuation 12, une vanne 17 placée sur la canalisation entre la pompe 30 et
l'orifice d'introduction 13 et une vanne 18 placée sur l'évent 14. Les vannes 15 à 18
sont commandées en synchronisme au moyen d'une unité de commande 40 qui reçoit
par ailleurs les signaux, d'une part, d'un détecteur de niveau bas 42 et, d'autre part, d'un
détecteur de niveau haut 41.The
Le fonctionnement du système de pompage 100 selon l'invention est le suivant.The operation of the
Dans une première phase appelée phase de remplissage, on effectue le
remplissage de la chambre du corps 10 avec un volume de liquide issu de la source 20.
Pour ce faire, on ouvre la vanne d'introduction 15 et la vanne de l'évent 18, la vanne
d'introduction de gaz 13 et la vanne d'évacuation 16 étant elles fermées. Le liquide issu
de la source 20 entre par gravité dans la chambre du corps 10, et ce via l'orifice
d'introduction 11. Le remplissage se fait jusqu'à ce que le liquide atteigne le niveau du
détecteur haut 41, lequel transmet un signal à l'unité de commande 40 qui déclenche la
fermeture des vannes 15 et 18.In a first phase called the filling phase, the
filling the chamber of the
On notera que l'évent 14 sert à l'évacuation de l'air qui est chassé de la chambre
du corps 10 par son remplissage de liquide.It will be noted that the
Dans une seconde phase appelée phase d'évacuation, la vanne d'introduction de
gaz 17 est ouverte ainsi que la vanne d'évacuation 16. Il en résulte la présence à la
surface du liquide qui est opposée à l'orifice 12, d'une pression de gaz donnée par la
pompe 30 qui a pour effet d'appuyer sur cette surface et de permettre l'évacuation du
liquide par l'orifice 12. Le liquide est expulsé et projeté sous la forme d'un jet de forte
puissance.In a second phase called the evacuation phase, the valve for introducing
On notera que, selon un mode préféré, la seconde phase commence aussitôt après
la fin de la première phase. En conséquence, les vannes 16 et 17 s'ouvrent aussitôt la
fermeture des vannes 15 et 18.It will be noted that, according to a preferred mode, the second phase begins immediately after
the end of the first phase. Consequently, the
On notera que l'ouverture de la vanne 16 peut légèrement être retardée par
rapport à l'ouverture de la vanne 17.It will be noted that the opening of the
Lorsque le niveau de liquide correspond à celui du détecteur bas 42, un signal est
transmis à l'unité de commande 40 qui déclenche la fermeture des vannes 16 et 17.
L'unité de commande 40 peut alors déclencher de nouveau la première phase du
processus.When the liquid level corresponds to that of the
Avec un tel système, la puissance consommée nécessaire à son fonctionnement a été de l'ordre de 11 CV alors que, pour avoir des mêmes performances de pression et de débit du jet d'eau obtenu une puissance de 120 CV est nécessaire avec une pompe centrifuge.With such a system, the power consumed necessary for its operation has was around 11 CV whereas, to have the same pressure performance and flow rate of the water jet obtained a power of 120 CV is necessary with a pump centrifugal.
Dans l'exemple de réalisation de la Fig. 2, l'évent 14 est remplacé par un orifice
14 relié, via la vanne 18, à une pompe d'aspiration 50. Le fonctionnement est similaire à
celui de l'exemple de réalisation représenté à la Fig. 1, à la différence que l'introduction
du liquide de la source 20 ne se fait plus par gravité mais en effectuant un vide dans la
chambre du corps 10 au moyen de la pompe d'aspiration 50.In the exemplary embodiment of FIG. 2, the
On notera encore qu'on pourrait remplacer les détecteurs 41 et 42 par un
pressostat qui, lorsque la pression dans le corps 10 atteint en montant une valeur limite
supérieure, permet la commande de la fermeture des vannes 15 et 18 et qui, lorsque la
pression dans le corps 10 atteint en descendant une valeur limite inférieure, permet la
commande de la fermeture des vannes 16 et 17.It will also be noted that
On a représenté à la Fig. 3, un corps 10 d'un système de pompage selon
l'invention avec ses orifices d'introduction 11 et 13 et son orifice d'évacuation 12 et son
évent (ou orifice d'aspiration) 14. Ce corps 10 présente la particularité de comprendre
dans sa partie inférieure, une partie tronconique 10a se resserrant vers l'orifice
d'évacuation 12. On a pu montrer que cette caractéristique était intéressante pour
obtenir une pulvérisation fine en fin de jet du fait du mélange d'eau et de gaz qui a lieu
en fin d'évacuation.There is shown in FIG. 3, a
A la Fig. 4, on a représenté une installation à n systèmes de pompage 101 à 10n
identiques au premier mode de réalisation représenté à la Fig. 1. On notera cependant
que lesdits systèmes pourraient être identiques au second mode de réalisation de la
Fig. 2. Dans cette Fig. 4, les vannes 15 à 18 de chaque système 101 à 10n n'ont pas été
représentées pour des raisons de clarté de la Fig. 4.In Fig. 4, there is shown an installation with
La source 20 est donc reliée aux n entrées d'introduction 11 des n systèmes de
pompage 101 à 10n, et ce via n vannes 15 respectives (voir Fig. 1). De même, la
pompe de compression 30 est reliée aux n entrées d'introduction de gaz sous pression
13 des n systèmes de pompage 10l à 10n, et ce via n vannes 17 respectives (voir
Fig. 1) et les n orifices d'évacuation 12 sont reliés à une sortie S. On remarquera les
évents 14 qui sont eux aussi reliés à des vannes respectives 18 (voir Fig. 1). The
L'unité de commande 40 commande chaque système 10i (i pouvant varier de 1 à
n) de la manière indiquée ci-dessus, c'est-à-dire selon deux phases, une phase de
remplissage I et une phase d'évacuation II, phases qui sont déclenchées et interrompues
après réception des signaux de niveau issus des détecteurs 41 et 42 de chaque système
10i. A la Fig. 5, on a représenté comment ces phases I et II se déroulent dans le temps
pour chaque système de pompage d'une installation qui en comporte 3 (n = 3). On
remarque, sur cette Fig. 5, que la durée de la phase de remplissage I est plus
importante que celle de la phase d'évacuation II.The
Au temps t0, le système 101 commence à se remplir, le système 102 évacue et le
système 103 finit de se remplir. Au temps t1, le système 101 se remplit toujours, le
système 102 a fini l'évacuation et commence à se remplir et le système 103 commence
l'évacuation. Au temps t2, le système 101 finit de se remplir et commence l'évacuation,
le système 102 se remplit toujours et le système 103 a fini l'évacuation et commence
son remplissage.At time t0, the
On constate que les phases d'évacuation II se suivent les unes après les autres, et que pendant que celle d'un système est en oeuvre, des phases de remplissage sont mises en oeuvre dans les autres systèmes. Avantageusement, on choisira un nombre n de systèmes tels que n fois la durée de la phase d'évacuation II correspondent à celle de la phase de remplissage I. En effet, dans ce cas, le débit sur la sortie S est sensiblement constant.It can be seen that the evacuation phases II follow one after the other, and that while that of one system is in use, filling phases are implemented in the other systems. Advantageously, a number n of systems will be chosen such that n times the duration of the discharge phase II correspond to that of the filling phase I. In fact, in this case, the flow rate at the outlet S is substantially constant.
Claims (8)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9716884A FR2774728A1 (en) | 1997-12-31 | 1997-12-31 | Liquid pumping system |
FR9716884 | 1997-12-31 | ||
FR9806130A FR2774729B1 (en) | 1997-12-31 | 1998-05-11 | LIQUID PUMPING SYSTEM |
FR9806130 | 1998-05-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0927826A1 true EP0927826A1 (en) | 1999-07-07 |
EP0927826B1 EP0927826B1 (en) | 2005-03-30 |
Family
ID=26234050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98460059A Expired - Lifetime EP0927826B1 (en) | 1997-12-31 | 1998-12-18 | Liquid pumping system |
Country Status (6)
Country | Link |
---|---|
US (1) | US6213348B1 (en) |
EP (1) | EP0927826B1 (en) |
AT (1) | ATE292245T1 (en) |
DE (1) | DE69829546T2 (en) |
ES (1) | ES2241109T3 (en) |
FR (1) | FR2774729B1 (en) |
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US7194853B1 (en) | 2001-06-12 | 2007-03-27 | Knight Andrew F | Pressurizer for a rocket engine |
US7082750B2 (en) * | 2002-08-09 | 2006-08-01 | Knight Andrew F | Pressurizer for a rocket engine |
US6499288B1 (en) | 2001-06-12 | 2002-12-31 | Andrew F. Knight | Pressurizer for a rocket engine |
US7611333B1 (en) * | 2002-05-07 | 2009-11-03 | Harrington Steven M | Multiple chamber pump and method |
US7007456B2 (en) * | 2002-05-07 | 2006-03-07 | Harrington Steven M | Dual chamber pump and method |
WO2008079202A1 (en) * | 2006-12-19 | 2008-07-03 | Lam Research Corporation | Measuring fluid quantities, blending liquid constituents, and dispensing blends |
US20170016458A1 (en) * | 2015-07-15 | 2017-01-19 | Materials and Technologies, Corp. | Simple Positive Displacement Pump Suitable for Pharmaceutical, Chemical, Biological, Viscous, Dense, Particulate Laden Fluids and Other Demanding Applications |
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Family Cites Families (6)
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---|---|---|---|---|
US4274552A (en) * | 1979-03-26 | 1981-06-23 | Coulter Electronics, Inc. | Liquid dispenser |
DE3430934C2 (en) * | 1984-08-22 | 1986-07-03 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Circuit arrangement for the controlled filling and refilling of containers with liquids |
GB9021094D0 (en) * | 1990-09-27 | 1990-11-07 | Oxford Glycosystems Ltd | Liquid delivery systems |
US5480063A (en) * | 1993-03-05 | 1996-01-02 | Keyes; Denis E. | Volumetric fluid dispensing apparatus |
US5680960A (en) * | 1993-03-05 | 1997-10-28 | Keyes; Denis E. | Volumetric fluid dispensing apparatus |
US5568882A (en) * | 1995-02-03 | 1996-10-29 | Abc Techcorp | Precise volume fluid dispenser |
-
1998
- 1998-05-11 FR FR9806130A patent/FR2774729B1/en not_active Expired - Fee Related
- 1998-12-18 DE DE69829546T patent/DE69829546T2/en not_active Expired - Fee Related
- 1998-12-18 EP EP98460059A patent/EP0927826B1/en not_active Expired - Lifetime
- 1998-12-18 AT AT98460059T patent/ATE292245T1/en not_active IP Right Cessation
- 1998-12-18 ES ES98460059T patent/ES2241109T3/en not_active Expired - Lifetime
- 1998-12-22 US US09/219,094 patent/US6213348B1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6615555A (en) * | 1966-11-03 | 1968-05-06 | ||
WO1980001937A1 (en) * | 1979-03-17 | 1980-09-18 | Saarbergwerke Ag | Process for transferring under high pressure liquid containing solid materials |
FR2597850A1 (en) * | 1986-04-28 | 1987-10-30 | Tecalemit Equip | Liquid-transfer device |
WO1995018685A1 (en) * | 1994-01-06 | 1995-07-13 | Ricom Engineering Limited | Liquid recovery apparatus |
Also Published As
Publication number | Publication date |
---|---|
ATE292245T1 (en) | 2005-04-15 |
FR2774729A1 (en) | 1999-08-13 |
ES2241109T3 (en) | 2005-10-16 |
DE69829546D1 (en) | 2005-05-04 |
EP0927826B1 (en) | 2005-03-30 |
DE69829546T2 (en) | 2006-05-11 |
US6213348B1 (en) | 2001-04-10 |
FR2774729B1 (en) | 2000-03-17 |
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