EP2179180B1 - Modulating liquid pump - Google Patents
Modulating liquid pump Download PDFInfo
- Publication number
- EP2179180B1 EP2179180B1 EP08836584.6A EP08836584A EP2179180B1 EP 2179180 B1 EP2179180 B1 EP 2179180B1 EP 08836584 A EP08836584 A EP 08836584A EP 2179180 B1 EP2179180 B1 EP 2179180B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- modulating
- liquid
- piston
- pressure
- 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.)
- Active
Links
- 239000007788 liquid Substances 0.000 title claims description 18
- 238000005086 pumping Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000033228 biological regulation Effects 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
- F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
- F04B23/08—Combinations of two or more pumps the pumps being of different types
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
Definitions
- the present invention relates to a modulating pump liquid, especially oil.
- the present text will refer to a modulating pump intended to be used with an oil burner.
- the modulating pump according to the invention is not limited to this particular use.
- Such a pump comprises an internal gear pump which is connected to a fuel atomization unit by a line maintained at constant pressure by means of a pressure regulator and a three-way valve device.
- This device optionally connects the oil atomization unit to either the pressure side of the pump or the return side of the pump to create a modulated pressure.
- the valve device applies the constant pressure or modulated pressure to the atomizer unit which allows the burner to operate at two power levels.
- the pumps equipping these burners can not however be controlled in an intermediate mode, between the high power and the low power.
- EP 0 202 714 comprising a pump body with an internal chamber, a suction pipe, a discharge pipe provided with a one-way valve, a coil disposed around a first portion of the pump body and a partially magnetisable piston, housed in said chamber and held in a position by a spring.
- a pump body with an internal chamber
- a suction pipe a suction pipe
- a discharge pipe provided with a one-way valve
- a coil disposed around a first portion of the pump body and a partially magnetisable piston, housed in said chamber and held in a position by a spring.
- the object of the invention is to enable a continuous control of a modulating pump between a minimum pressure and a maximum pressure.
- continuous control it is meant that the outlet pressure of the liquid can be controlled at any set pressure between the minimum pressure and the maximum pressure.
- the invention is based on the use of an electromagnetic pump arranged in a modulating pump and on an electrical control device for adjusting the piston stroke of this electromagnetic pump.
- the invention thus relates to a modulating liquid pump comprising an input port for receiving a liquid and an outlet port for dispensing said liquid, an electromagnetic pump disposed between the input port and the output port comprising a piston for pumping said liquid, said modulating pump comprising an electric-type liquid pressure regulating means and able to regulate the stroke of said piston as a function of an electrical reference signal, and additional pumping means arranged between the input port and the electromagnetic pump, the additional pumping means being of the gear pump type.
- the stroke of the piston is controlled by the voltage level of the electrical reference signal.
- the regulating means is adapted to apply a modulated voltage signal to an excitation winding of the electromagnetic pump.
- the regulating means is designed to receive an AC voltage signal and may comprise a means for rectifying this signal, for example a diode bridge if it is desired to rectify the negative half-waves or a diode if one simply want to remove negative alternations.
- the regulation means is adapted to receive an alternating electrical signal at a frequency of 50 Hz or 60 Hz.
- the modulating pump comprises a liquid anti-backflow device between the input port and the output port.
- the backflow prevention device may comprise a suction valve arranged upstream of the electromagnetic pump and a discharge valve arranged downstream of the electromagnetic pump.
- the modulating pump includes additional pumping means disposed between the input port and the electromagnetic pump.
- This additional pumping means is of the gear pump type.
- the modulating pump may comprise means for regulating the minimum pressure and / or the maximum pressure of the liquid.
- the modulating pump 2 comprises an inlet port 4 intended to be connected to an oil tank 6 and an outlet port 8 intended to be connected to a nozzle 10.
- An electromagnetic pump 12 is disposed between the input port and the output port.
- This electromagnetic pump 12 comprises, in a conventional manner, an excitation winding 14 which is intended to be powered by an electrical control signal, a cylindrical armature 16 connected to a pump piston 18 and a compression spring 20.
- the piston slides in a cylinder 22 which communicates with the suction by a suction valve 24 and with the discharge by a discharge valve 26.
- the supply voltage defines the stroke of the piston, and consequently the flow rate of the oil pumped by the piston and thus the oil pressure at the outlet port 8.
- This supply voltage is a modulated voltage for driving the piston in a back and forth motion. It is provided by a regulation means 28 which receives an electrical reference signal Vc.
- the setpoint signal is derived for example from an AC voltage signal from the electrical network at 50 Hz or 60 Hz and whose voltage is adjusted according to the desired fuel pressure.
- the rectifying means 30 is a diode, which eliminates the negative half waves of the signal Vc. Negative alternations could also be straightened by means of a diode bridge. Finally, in some applications, it is possible to directly apply the alternating signal to the excitation winding, if the frequency of the alternating signal is chosen low enough to allow the piston to perform its movement back and forth with the desired amplitude, despite its inertia.
- the electromagnetic pump 12 may have insufficient suction capacity to allow only the correct operation of the modulating pump 2, especially when the fuel tank 6 is away from the modulating pump 2, for example when this distance is from several meters.
- the modulating pump 2 advantageously comprises an additional gear pump, which is arranged upstream of the electromagnetic pump and which is intended to supplement the low suction capacity of the electromagnetic pump.
- the modulating pump furthermore generally comprises a minimum pressure regulator 34 and a maximum pressure regulator 36 respectively upstream and downstream of the electromagnetic pump, these regulators being moreover connected to a discharge pipe 18 opening into the reservoir 6.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
- Feeding And Controlling Fuel (AREA)
Description
La présente invention concerne une pompe modulante à liquide, notamment à fioul.The present invention relates to a modulating pump liquid, especially oil.
A titre d'exemple, le présent texte fera référence à une pompe modulante destinée à être utilisée avec un brûleur à fioul. On comprend cependant que la pompe modulante selon l'invention n'est pas limitée à cette utilisation particulière.By way of example, the present text will refer to a modulating pump intended to be used with an oil burner. However, it is understood that the modulating pump according to the invention is not limited to this particular use.
Depuis longtemps, les fabricants de brûleurs à fioul cherchent un moyen d'adapter la puissance des brûleurs aux besoins réels en chauffage au gré des variations de température extérieure.For a long time, oil burner manufacturers have been looking for ways to adapt the burner capacity to the actual heating needs as outdoor temperatures change.
On connaît des brûleurs pouvant fonctionner à deux puissances, dites basse et haute. Une telle pompe est divulguée notamment par le document
Les pompes équipant ces brûleurs ne peuvent cependant pas être commandées dans un mode intermédiaire, entre la puissance haute et la puissance basse.The pumps equipping these burners can not however be controlled in an intermediate mode, between the high power and the low power.
On connaît également des brûleurs à modulation pour des moyennes et grandes puissances, par exemple de 1000 à 30 000 kW, dont la pression de pulvérisation du fioul est réglée de façon continue par action sur une vis de réglage d'un régulateur de pression. Le document
On connaît aussi une pompe modulante de façon électronique, telle que celle décrite dans le brevet européen
L'invention a pour but de permettre de façon simple la commande de manière continue d'une pompe modulante entre une pression minimale et une pression maximale. Par commande en continu, on entend que la pression de sortie du liquide peut être commandée à une pression de consigne quelconque entre la pression minimale et la pression maximale.The object of the invention is to enable a continuous control of a modulating pump between a minimum pressure and a maximum pressure. By continuous control, it is meant that the outlet pressure of the liquid can be controlled at any set pressure between the minimum pressure and the maximum pressure.
L'invention repose sur l'utilisation d'une pompe électromagnétique agencée dans une pompe modulante et sur un dispositif de commande électrique pour régler la course du piston de cette pompe électromagnétique.The invention is based on the use of an electromagnetic pump arranged in a modulating pump and on an electrical control device for adjusting the piston stroke of this electromagnetic pump.
Le Demandeur a en effet constaté que la pression du liquide en sortie de la pompe modulante est une fonction pratiquement linéaire de la tension du signal de commande électrique appliqué à la pompe électromagnétique.The Applicant has indeed found that the pressure of the liquid output of the modulating pump is a virtually linear function of the voltage of the electrical control signal applied to the electromagnetic pump.
L'invention a ainsi pour objet une pompe modulante à liquide comprenant un port d'entrée pour recevoir un liquide et un port de sortie pour distribuer ledit liquide, une pompe électromagnétique disposée entre le port d'entrée et le port de sortie comprenant un piston pour pomper ledit liquide, ladite pompe modulante comprenant un moyen de régulation de la pression du liquide de type électrique et apte à réguler la course dudit piston en fonction d'un signal électrique de consigne, et un moyen de pompage supplémentaire disposé entre le port d'entrée et la pompe électromagnétique, le moyen de pompage supplémentaire étant de type pompe à engrenage.The invention thus relates to a modulating liquid pump comprising an input port for receiving a liquid and an outlet port for dispensing said liquid, an electromagnetic pump disposed between the input port and the output port comprising a piston for pumping said liquid, said modulating pump comprising an electric-type liquid pressure regulating means and able to regulate the stroke of said piston as a function of an electrical reference signal, and additional pumping means arranged between the input port and the electromagnetic pump, the additional pumping means being of the gear pump type.
De manière avantageuse, la course du piston est commandée par le niveau de tension du signal électrique de consigne.Advantageously, the stroke of the piston is controlled by the voltage level of the electrical reference signal.
Selon un mode de réalisation préféré, le moyen de régulation est conçu pour appliquer sur un enroulement d'excitation de la pompe électromagnétique un signal de tension électrique modulé.According to a preferred embodiment, the regulating means is adapted to apply a modulated voltage signal to an excitation winding of the electromagnetic pump.
En particulier, le moyen de régulation est conçu pour recevoir un signal électrique de tension alternatif et peut comporter un moyen de redressement de ce signal, par exemple un pont de diodes si l'on souhaite redresser les alternances négatives ou une diode si l'on souhaite simplement supprimer les alternances négatives.In particular, the regulating means is designed to receive an AC voltage signal and may comprise a means for rectifying this signal, for example a diode bridge if it is desired to rectify the negative half-waves or a diode if one simply want to remove negative alternations.
Selon un mode de réalisation particulier, le moyen de régulation est apte à recevoir un signal électrique alternatif à une fréquence de 50 Hz ou 60 Hz.According to a particular embodiment, the regulation means is adapted to receive an alternating electrical signal at a frequency of 50 Hz or 60 Hz.
De manière avantageuse, la pompe modulante comporte un dispositif anti-refoulement du liquide entre le port d'entrée et le port de sortie.Advantageously, the modulating pump comprises a liquid anti-backflow device between the input port and the output port.
En particulier, le dispositif anti-refoulement peut comprendre une soupape d'aspiration disposée en amont de la pompe électromagnétique et une soupape de refoulement disposée en aval de la pompe électromagnétique.In particular, the backflow prevention device may comprise a suction valve arranged upstream of the electromagnetic pump and a discharge valve arranged downstream of the electromagnetic pump.
La pompe modulante comprend un moyen de pompage supplémentaire disposé entre le port d'entrée et la pompe électromagnétique.The modulating pump includes additional pumping means disposed between the input port and the electromagnetic pump.
Ce moyen de pompage supplémentaire est de type pompe à engrenage.This additional pumping means is of the gear pump type.
De manière préférée, la pompe modulante peut comprendre un moyen de régulation de la pression minimale et/ou de la pression maximale du liquide.Preferably, the modulating pump may comprise means for regulating the minimum pressure and / or the maximum pressure of the liquid.
L'invention sera mieux comprise à la lumière de la description qui va suivre, faite à titre illustratif et non limitatif, en référence au dessin unique annexé sur lequel on a représenté schématiquement une pompe modulante selon l'invention pour alimenter un gicleur à fioul.The invention will be better understood in the light of the description which follows, made by way of illustration and not limitation, with reference to the accompanying single drawing which schematically shows a modulating pump according to the invention for supplying a fuel nozzle.
La pompe modulante 2 comprend un port d'entrée 4 destiné à être relié à un réservoir de fioul 6 et un port de sortie 8 destiné à être relié à un gicleur 10.The modulating
Une pompe électromagnétique 12 est disposée entre le port d'entrée et le port de sortie. Cette pompe électromagnétique 12 comprend, de manière classique, un enroulement d'excitation 14 qui est destiné à être alimenté par un signal électrique de commande, une armature cylindrique 16 liée à un piston de pompe 18 et un ressort 20 de compression. Le piston coulisse dans un cylindre 22 qui communique avec l'aspiration par une soupape d'aspiration 24 et avec le refoulement par une soupape de refoulement 26.An
Le Demandeur a constaté que lorsque la tension d'alimentation sur l'enroulement d'excitation 14 décroît, ce qui entraîne une réduction de la course du piston 18, la pression du fioul décroît également dans la pompe modulante, et ce de façon presque linéaire.The Applicant has found that when the supply voltage on the excitation winding 14 decreases, which leads to a reduction in the stroke of the
Plus exactement, la tension d'alimentation définit la course du piston, et par suite le débit du fioul pompé par le piston et ainsi la pression du fioul au niveau du port de sortie 8.More exactly, the supply voltage defines the stroke of the piston, and consequently the flow rate of the oil pumped by the piston and thus the oil pressure at the outlet port 8.
Cette tension d'alimentation est une tension modulée, pour entraîner le piston dans un mouvement de va-et-vient. Elle est fournie par un moyen de régulation 28 qui reçoit un signal électrique de consigne Vc. Le signal de consigne est dérivé par exemple d'un signal de tension alternative issu du réseau électrique à 50 Hz ou 60 Hz et dont la tension est ajustée en fonction de la pression de fioul désirée.This supply voltage is a modulated voltage for driving the piston in a back and forth motion. It is provided by a regulation means 28 which receives an electrical reference signal Vc. The setpoint signal is derived for example from an AC voltage signal from the electrical network at 50 Hz or 60 Hz and whose voltage is adjusted according to the desired fuel pressure.
Dans le mode de réalisation représenté, le moyen de redressement 30 est une diode, ce qui supprime les alternances négatives du signal Vc. On pourrait également redresser les alternances négatives au moyen d'un pont de diodes. Enfin, dans certaines applications, il est possible d'appliquer directement le signal alternatif à l'enroulement d'excitation, si la fréquence du signal alternatif est choisie suffisamment faible pour permettre au piston d'accomplir son mouvement de va-et-vient avec l'amplitude désirée, malgré son inertie.In the embodiment shown, the rectifying
Dans certaines applications, la pompe électromagnétique 12 peut avoir une capacité d'aspiration insuffisante pour permettre seule le fonctionnement correct de la pompe modulante 2, notamment lorsque le réservoir de fioul 6 est éloigné de la pompe modulante 2, par exemple lorsque cette distance est de plusieurs mètres. Dans ce cas, la pompe modulante 2 comprend avantageusement une pompe supplémentaire à engrenage, qui est disposée en amont de la pompe électromagnétique et qui est destinée à suppléer la faible capacité d'aspiration de la pompe électromagnétique.In some applications, the
La pompe modulante comprend en outre généralement un régulateur de pression minimale 34 et un régulateur de pression maximale 36 respectivement en amont et en aval de la pompe électromagnétique, ces régulateurs étant par ailleurs reliés à une canalisation de refoulement 18 débouchant dans le réservoir 6.The modulating pump furthermore generally comprises a
Elle peut comprendre encore du côté du refoulement de la pompe électromagnétique 12, comme représenté, un capteur de pression 38, un accumulateur hydropneumatique 40, pour effectuer un lissage des fluctuations de pression dues au mouvement de va-et-vient du piston, et une électrovanne de coupure de sécurité 42.It may further comprise on the discharge side of the
Claims (8)
- Modulating liquid pump (2) comprising an inlet port (4) to receive a liquid and an outlet port (6) to distributed said liquid, an electromagnetic pump (12) located between the inlet port and the outlet port and comprising a piston (18) to pump said liquid, said modulating pump comprising an electrical means (28) of regulating the pressure of the liquid capable of regulating the stroke of said piston (18) as a function of an electrical control signal (Vc), said modulating pump being characterised by a supplementary pumping means (32) located between the inlet port (4) and the electromagnetic pump (12), the supplementary pumping means being of the geared pump type.
- Modulating pump according to claim 1, characterised in that the stroke of the piston (18) is controlled by the voltage amplitude of the electrical control signal (Vc).
- Modulating pump according to one of the preceding claims, characterised in that the regulation means (28) is designed to apply a modulated electrical voltage signal on an excitation winding (14) of the electromagnetic pump (12).
- Modulating pump according to claim 3, characterised in that the regulation means (28) is designed to receive an alternating electrical voltage signal and comprises a means (30) of rectifying this signal.
- Modulating pump according to claim 3 or 4, characterised in that the regulation means (28) is capable of receiving an alternating electrical signal at a frequency of 50 Hz or 60 Hz.
- Modulating pump according to one of the preceding claims, characterised in that it comprises a liquid backflow prevention device (24, 26) between the inlet port and the outlet port.
- Modulating pump according to claim 6, characterised in that the backflow prevention device comprises an intake valve (24) located upstream from the piston (18) of the electromagnetic pump (12) and a discharge valve (26) located downstream from the piston (18) of the electromagnetic pump (12).
- Pump according to one of the preceding claims, characterised in that it comprises a means (34, 36) of regulating the minimum pressure and/or the maximum pressure of the liquid.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0705462A FR2919356B1 (en) | 2007-07-26 | 2007-07-26 | MODULATING LIQUID PUMP |
PCT/FR2008/001107 WO2009044016A2 (en) | 2007-07-26 | 2008-07-24 | Modulating liquid pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2179180A2 EP2179180A2 (en) | 2010-04-28 |
EP2179180B1 true EP2179180B1 (en) | 2018-11-07 |
Family
ID=38963133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08836584.6A Active EP2179180B1 (en) | 2007-07-26 | 2008-07-24 | Modulating liquid pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120288381A1 (en) |
EP (1) | EP2179180B1 (en) |
CA (1) | CA2694607A1 (en) |
FR (1) | FR2919356B1 (en) |
WO (1) | WO2009044016A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITBO20120128A1 (en) | 2012-03-13 | 2013-09-14 | Riello Spa | COMBUSTION EQUIPMENT OF LIQUID FUELS AND ITS METHOD TO MODULATE THE POWER OF SUCH EQUIPMENT |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3852315A (en) * | 1967-07-14 | 1974-12-03 | Lever Brothers Ltd | Process of interesterification of glyceride oils |
GB2034806B (en) * | 1978-11-17 | 1982-12-08 | Taisan Industrial Co | Electromagnetic plunger pump |
NL8501402A (en) * | 1985-05-15 | 1986-12-01 | Euratom | PUMP WITH ELECTRONICALLY ADJUSTABLE IMPACT VOLUME. |
US4830576A (en) * | 1987-11-09 | 1989-05-16 | Dukes, Inc. | Metering fuel pump |
US4965864A (en) * | 1987-12-07 | 1990-10-23 | Roth Paul E | Linear motor |
IT1221912B (en) * | 1987-12-09 | 1990-07-12 | Weber Srl | VARIABLE DISPLACEMENT FUEL INJECTION PUMP FOR DIESEL ENGINE INJECTION EQUIPMENT |
JPH02145678U (en) * | 1989-05-16 | 1990-12-11 | ||
JPH02145679U (en) * | 1989-05-16 | 1990-12-11 | ||
DE4318553C2 (en) * | 1993-06-04 | 1995-05-18 | Daimler Benz Ag | Adaptive hydropneumatic pulsation damper |
US6203292B1 (en) * | 1997-04-20 | 2001-03-20 | Matsushita Refrigeration Company | Oscillation-type compressor |
KR100317301B1 (en) * | 2000-01-21 | 2001-12-22 | 구자홍 | apparatus and method for sensing position of piston in linear compressor |
JP2002021715A (en) * | 2000-07-10 | 2002-01-23 | Matsushita Electric Ind Co Ltd | Device and method for feeding fluid |
DE10151885A1 (en) * | 2001-10-20 | 2003-05-08 | Bosch Gmbh Robert | Fuel injection system has gear pump to supply fuel at medium pressure before booster |
JP4365558B2 (en) * | 2002-04-08 | 2009-11-18 | 株式会社テクノ高槻 | Electromagnetic vibration type diaphragm pump |
JP2006506571A (en) * | 2002-11-19 | 2006-02-23 | エンプレサ・ブラジレイラ・ディ・コンプレッソレス・ソシエダッド・アノニマ・エンブラコ | Piston operation control system and method for fluid pump device and fluid pump device |
US20050160752A1 (en) * | 2004-01-23 | 2005-07-28 | Nanocoolers, Inc. | Apparatus and methodology for cooling of high power density devices by electrically conducting fluids |
ITRM20040371A1 (en) * | 2004-07-21 | 2004-10-21 | Seko Italia S P A | DRIVING DEVICE FOR AN ELECTROMAGNET, IN PARTICULAR FOR THE OPERATION OF PUMPS. |
-
2007
- 2007-07-26 FR FR0705462A patent/FR2919356B1/en not_active Expired - Fee Related
-
2008
- 2008-07-24 EP EP08836584.6A patent/EP2179180B1/en active Active
- 2008-07-24 CA CA2694607A patent/CA2694607A1/en not_active Abandoned
- 2008-07-24 WO PCT/FR2008/001107 patent/WO2009044016A2/en active Application Filing
-
2011
- 2011-05-10 US US13/104,934 patent/US20120288381A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
US20120288381A1 (en) | 2012-11-15 |
CA2694607A1 (en) | 2009-04-09 |
FR2919356B1 (en) | 2009-10-30 |
WO2009044016A2 (en) | 2009-04-09 |
WO2009044016A3 (en) | 2009-06-11 |
EP2179180A2 (en) | 2010-04-28 |
FR2919356A1 (en) | 2009-01-30 |
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