US20120288381A1 - Modulating liquid pump - Google Patents
Modulating liquid pump Download PDFInfo
- Publication number
- US20120288381A1 US20120288381A1 US13/104,934 US201113104934A US2012288381A1 US 20120288381 A1 US20120288381 A1 US 20120288381A1 US 201113104934 A US201113104934 A US 201113104934A US 2012288381 A1 US2012288381 A1 US 2012288381A1
- Authority
- US
- United States
- Prior art keywords
- pump
- modulating
- liquid
- piston
- regulating
- 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.)
- Abandoned
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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
- Fuel-oil burner manufacturers have long searched for a means of adapting the power of the burners to the actual heating requirements dependent on the variations in the outdoor temperature.
- Burners are known which are capable of operating at two powers referred to as low and high.
- a pump is disclosed in particular by the document EP 0 715 704. It comprises a pump with internal gearing which is connected to a fuel-oil automation unit via a line kept at constant pressure by a pressure regulator and a three-way valve device.
- This device optionally connects the fuel-oil automation unit to either the pressure side or the return side of the pump so as to create a modulated pressure.
- the valve device applies the constant pressure or the modulated pressure to the automation unit, thereby enabling the burner to operate at two power levels.
- Modulating burners are likewise known for medium and high powers, e.g., from 1,000 to 30,000 kW, the fuel-oil spraying power of which is regulated continuously by acting on an adjusting screw of a pressure regulator.
- the document FR 2 241 746 describes such a burner.
- this type of regulation is not suited to low-power burners, due the cost thereof and to the overall dimensions of same.
- An electronically modulating pump is also known, such as the one described in European Patent EP 0 202 714, comprising a pump body with an internal chamber, an intake channel, a discharge line provided with a one-way valve, a coil arranged around a first portion of the pump body and a partially magnetisable piston housed inside said chamber and held in one position by a spring.
- a pump body with an internal chamber, an intake channel, a discharge line provided with a one-way valve, a coil arranged around a first portion of the pump body and a partially magnetisable piston housed inside said chamber and held in one position by a spring.
- the purpose of the invention is to easily enable a modulating pump to be operated continuously between a minimum pressure and a maximum pressure.
- continuous operation it is understood to mean 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 electric control device for regulating the travel of the piston of this electromagnetic pump.
- the object of the invention is a modulating liquid pump comprising a inlet port for receiving a liquid and an outlet port for delivering said liquid, an electromagnetic pump arranged between the inlet port and the outlet port and comprising a piston for pumping said liquid, a means of regulating the pressure of the liquid, said modulating pump being characterised in that said regulating means is of the electric type and is capable of regulating the travel of said piston according to an electrical setpoint signal.
- the piston travel is advantageously controlled by the voltage level of the electrical setpoint signal.
- the regulating means is designed to apply a modulated electrical voltage signal to an excitation winding of the electromagnetic pump.
- the regulating means is designed to receive an alternating electrical voltage signal and may comprise a means of rectifying this signal, e.g., a diode bridge if it is desired to rectify the negative alternations, or a diode if it is desired to simply eliminate the negative alternations.
- a means of rectifying this signal e.g., a diode bridge if it is desired to rectify the negative alternations, or a diode if it is desired to simply eliminate the negative alternations.
- the regulating means is capable of receiving an alternating electrical signal at a frequency of 50 Hz or 60 Hz.
- the modulating pump advantageously comprises an anti-backflow device for the liquid between the inlet port and the outlet port.
- the anti-backflow device can include an intake valve arranged upstream from the electromagnetic pump and a discharge valve arranged downstream from the electromagnetic pump.
- the modulating pump includes an additional pumping means arranged between the inlet port and the electromagnetic pump.
- This additional pumping means is advantageously of the gear pump type.
- the modulating pump can preferably include a means of regulating the minimum pressure and/or the maximum pressure of the liquid.
- the modulating pump 2 includes an inlet port 4 intended to be connected to a fuel-oil tank 6 and an outlet port 8 intended to be connected to a nozzle 10 .
- An electromagnetic pump 12 is arranged between the inlet port and the outlet port.
- This electromagnetic pump 12 conventionally includes an excitation winding 14 , which is intended to be powered by an electrical control signal, a cylindrical armature 16 linked with a pump piston 18 and a compression spring 20 .
- the piston slides inside a cylinder 22 which communicates with the intake via an intake valve 24 and with the discharge via a discharge valve 26 .
- the supply voltage determines the piston travel, and consequently the flow rate of the fuel oil pump by the piston and thus the pressure of the fuel oil at the outlet port 8 .
- This supply voltage is a modulated voltage for driving the piston in a back-and-forth movement. It is provided with a regulating means 28 which receives an electrical setpoint signal Vc.
- the setpoint signal for example, is derived from an alternating voltage signal coming from the electrical network at 50 Hz or 60 Hz, and the voltage of which is adjusted according to the desired fuel-oil pressure.
- the rectifying means 30 is a diode, which eliminates the negative alternations of the signal Vc. It would likewise be possible to rectify the negative alternations by means of a diode bridge. Finally, in certain applications, it is possible to apply the alternating signal directly to the excitation winding, if the frequency of the alternating signal is chosen to be sufficiently low to enable the piston to accomplish its back-and-forth movement thereof with the desired amplitude, despite its inertia.
- the modulating pump likewise further includes a minimum pressure regulator 34 and a maximum pressure regulator 36 , upstream and downstream from the electromagnetic pump, respectively, these regulators also being connected to a discharge line 18 terminating in the tank 6 .
- the electromagnetic pump 12 may further include a pressure sensor 38 , a hydro-pneumatic accumulator 40 , for smoothing out the fluctuations in pressure due to the back-and-forth movement of the piston, and a solenoid safety shut-off valve 42 .
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)
Abstract
The present invention relates to a modulating liquid pump. This pump comprises an inlet port for receiving a liquid and an outlet port for delivering said liquid, an electromagnetic pump placed between the inlet port and the outlet port and comprising a piston for pumping said liquid, said modulating pump further including a regulating means, for regulating the pressure of the liquid. This pump is noteworthy in that said regulating means is of the electric type and is capable of regulating the travel of said piston according to an electrical setpoint signal (Vc). Application to fuel oil burners.
Description
- The present application is a continuation of U.S. patent application Ser. No. 12/670,845, which is the U.S. National Stage of International Patent Application PCT/FR2008/001107, filed on Jul. 24, 2008. Through the '845 application the present application claims priority to French Patent Application 0705462 filed on Jul. 26, 2007. Each of the aforementioned applications are encorporated by reference herein in their entirety.
- This invention relates to a modulating pump for liquid, in particular for fuel oil.
- For illustrative purposes, this text will make reference to a modulating pump intended for use with a fuel-oil burner. However, it is understood that the modulating pump according to the invention is not limited to this particular use.
- Fuel-oil burner manufacturers have long searched for a means of adapting the power of the burners to the actual heating requirements dependent on the variations in the outdoor temperature.
- Burners are known which are capable of operating at two powers referred to as low and high. Such a pump is disclosed in particular by the document EP 0 715 704. It comprises a pump with internal gearing which is connected to a fuel-oil automation unit via a line kept at constant pressure by a pressure regulator and a three-way valve device. This device optionally connects the fuel-oil automation unit to either the pressure side or the return side of the pump so as to create a modulated pressure. The valve device applies the constant pressure or the modulated pressure to the automation unit, thereby enabling the burner to operate at two power levels.
- However, the pumps equipping these burners cannot be operated in an intermediate mode between high power and low power.
- Modulating burners are likewise known for medium and high powers, e.g., from 1,000 to 30,000 kW, the fuel-oil spraying power of which is regulated continuously by acting on an adjusting screw of a pressure regulator. The
document FR 2 241 746 describes such a burner. However, this type of regulation is not suited to low-power burners, due the cost thereof and to the overall dimensions of same. - An electronically modulating pump is also known, such as the one described in European Patent EP 0 202 714, comprising a pump body with an internal chamber, an intake channel, a discharge line provided with a one-way valve, a coil arranged around a first portion of the pump body and a partially magnetisable piston housed inside said chamber and held in one position by a spring. By increasing the voltage at the coil terminals, the piston moves under the effects of the magnetic field, and the fluid is discharged. By controlling the voltage frequency of the coil, the discharge volume of the pump is varied. However, in this case, only the volume of fluid displaced is regulated and not the pressure.
- The purpose of the invention is to easily enable a modulating pump to be operated continuously between a minimum pressure and a maximum pressure. By continuous operation it is understood to mean 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 electric control device for regulating the travel of the piston of this electromagnetic pump.
- The applicant has indeed observed that the pressure of the pressure of the liquid at the outlet of the modulating pump is a nearly linear function of the voltage of the electrical control signal applied to the electromagnetic pump.
- Thus, the object of the invention is a modulating liquid pump comprising a inlet port for receiving a liquid and an outlet port for delivering said liquid, an electromagnetic pump arranged between the inlet port and the outlet port and comprising a piston for pumping said liquid, a means of regulating the pressure of the liquid, said modulating pump being characterised in that said regulating means is of the electric type and is capable of regulating the travel of said piston according to an electrical setpoint signal.
- The piston travel is advantageously controlled by the voltage level of the electrical setpoint signal.
- According to a preferred embodiment, the regulating means is designed to apply a modulated electrical voltage signal to an excitation winding of the electromagnetic pump.
- In particular, the regulating means is designed to receive an alternating electrical voltage signal and may comprise a means of rectifying this signal, e.g., a diode bridge if it is desired to rectify the negative alternations, or a diode if it is desired to simply eliminate the negative alternations.
- According to one particular embodiment, the regulating means is capable of receiving an alternating electrical signal at a frequency of 50 Hz or 60 Hz.
- The modulating pump advantageously comprises an anti-backflow device for the liquid between the inlet port and the outlet port.
- In particular, the anti-backflow device can include an intake valve arranged upstream from the electromagnetic pump and a discharge valve arranged downstream from the electromagnetic pump.
- According to one preferred embodiment, the modulating pump includes an additional pumping means arranged between the inlet port and the electromagnetic pump.
- This additional pumping means is advantageously of the gear pump type.
- The modulating pump can preferably include a means of regulating the minimum pressure and/or the maximum pressure of the liquid.
- The invention will be better understood in light of the following description, which is made for illustrative and non-limiting purposes, with reference to the single appended drawing in which a schematic representation has been shown of a modulating pump according to the invention for supplying a fuel-oil nozzle.
- The modulating
pump 2 includes an inlet port 4 intended to be connected to a fuel-oil tank 6 and an outlet port 8 intended to be connected to anozzle 10. - An
electromagnetic pump 12 is arranged between the inlet port and the outlet port. Thiselectromagnetic pump 12 conventionally includes an excitation winding 14, which is intended to be powered by an electrical control signal, acylindrical armature 16 linked with apump piston 18 and acompression spring 20. The piston slides inside a cylinder 22 which communicates with the intake via anintake valve 24 and with the discharge via adischarge valve 26. - The applicant observed that, when the supply voltage on the excitation winding 14 decreases, thereby resulting in a reduction in the travel of the
piston 18, the pressure of the fuel oil likewise decreases in the modulating pump, and does so almost linearly. - More precisely, the supply voltage determines the piston travel, and consequently the flow rate of the fuel oil pump by the piston and thus the pressure of the fuel oil at the outlet port 8.
- This supply voltage is a modulated voltage for driving the piston in a back-and-forth movement. It is provided with a regulating
means 28 which receives an electrical setpoint signal Vc. The setpoint signal, for example, is derived from an alternating voltage signal coming from the electrical network at 50 Hz or 60 Hz, and the voltage of which is adjusted according to the desired fuel-oil pressure. - In the embodiment shown, the rectifying
means 30 is a diode, which eliminates the negative alternations of the signal Vc. It would likewise be possible to rectify the negative alternations by means of a diode bridge. Finally, in certain applications, it is possible to apply the alternating signal directly to the excitation winding, if the frequency of the alternating signal is chosen to be sufficiently low to enable the piston to accomplish its back-and-forth movement thereof with the desired amplitude, despite its inertia. - In certain applications, the
electromagnetic pump 12 may have intake capacity which alone is insufficient to enable proper operation of the modulatingpump 2, in particular when the fuel-oil tank 6 is distant from the modulatingpump 2, for example, when this distance is several meters. In this case, the modulatingpump 2 advantageously includes anadditional pump 28, e.g., such as a gear pump, which is arranged upstream from the electromagnetic pump and which is intended to supplement the low intake capacity of the electromagnetic pump. - The modulating pump likewise further includes a
minimum pressure regulator 34 and amaximum pressure regulator 36, upstream and downstream from the electromagnetic pump, respectively, these regulators also being connected to adischarge line 18 terminating in thetank 6. - As shown, on the discharge side of the
electromagnetic pump 12, it may further include apressure sensor 38, a hydro-pneumatic accumulator 40, for smoothing out the fluctuations in pressure due to the back-and-forth movement of the piston, and a solenoid safety shut-offvalve 42.
Claims (10)
1. Modulating liquid pump (2) comprising an inlet port (4) receiving a liquid and an outlet port (6) for delivering said liquid, an electromagnetic pump (12) arranged between the inlet port and the outlet port and comprising a piston (18) for pumping said liquid, said modulating pump comprising a means of regulating (28) the pressure of the liquid, characterised in that said regulating means (28) is of the electric type and is capable of regulating the travel of said piston (18) according to an electrical setpoint signal (Vc).
2. Modulating pump of claim 1 , characterised in that the travel of the piston (18) is controlled by the voltage level of the electrical setpoint signal (Vc).
3. Modulating pump as claimed in one of the preceding claims, characterised in that the regulating means (28) is designed to apply a modulated electrical voltage signal to an excitation winding (14) of the electromagnetic pump (12).
4. Modulating pump of claim 3 , characterised in that the regulating means (28) is designed to receive an alternating electrical voltage signal and comprises a means of rectifying (30) this signal.
5. Modulating pump as claimed in one of claims 3 or 4 , characterised in that the regulating means (28) is capable of receiving an alternating electrical signal at a frequency of 50 Hz or 60 Hz.
6. Modulating pump as claimed in one of the preceding claims, characterised in that it comprises an anti-backflow device (24, 26) for the liquid between the inlet port and the outlet port.
7. Modulating pump of claim 6 , characterised in that the anti-backflow device includes an intake valve (24) arranged upstream from the piston (18) of the electromagnetic pump (12) and a discharge valve (26) arranged downstream from the piston (18) of the electromagnetic pump (12).
8. Modulating pump as claimed in one of the preceding claims, characterised in that it includes an additional pumping means (32) arranged between the inlet port (4) and the electromagnetic pump (12).
9. Modulating pump of claim 10 , characterised in that the additional pumping means is of the gear pump type.
10. Pump as claimed in one of the preceding claims, characterised in that it includes a means of regulating (34, 36) the minimum pressure and/or the maximum pressure of the liquid.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/104,934 US20120288381A1 (en) | 2007-07-26 | 2011-05-10 | Modulating liquid pump |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0705462A FR2919356B1 (en) | 2007-07-26 | 2007-07-26 | MODULATING LIQUID PUMP |
FR0705462 | 2007-07-26 | ||
PCT/FR2008/001107 WO2009044016A2 (en) | 2007-07-26 | 2008-07-24 | Modulating liquid pump |
US95171510A | 2010-11-22 | 2010-11-22 | |
US13/104,934 US20120288381A1 (en) | 2007-07-26 | 2011-05-10 | Modulating liquid pump |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US95171510A Continuation | 2007-07-26 | 2010-11-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120288381A1 true US20120288381A1 (en) | 2012-11-15 |
Family
ID=38963133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/104,934 Abandoned US20120288381A1 (en) | 2007-07-26 | 2011-05-10 | 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 |
Citations (12)
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 |
US4830576A (en) * | 1987-11-09 | 1989-05-16 | Dukes, Inc. | Metering fuel pump |
US4928656A (en) * | 1987-12-09 | 1990-05-29 | Weber S.R.L. | Fuel-injection pump with variable cylinder capacity for diesel engine injection systems |
US4965864A (en) * | 1987-12-07 | 1990-10-23 | Roth Paul E | Linear motor |
US5106267A (en) * | 1989-05-16 | 1992-04-21 | Nitto Kohki Co., Ltd. | Outlet pressure control system for electromagnetic reciprocating pump |
US5106268A (en) * | 1989-05-16 | 1992-04-21 | Nitto Kohki Co., Ltd. | Outlet pressure control system for electromagnetic reciprocating pump |
US5797430A (en) * | 1993-06-04 | 1998-08-25 | Mercedes-Benz Ag | Adaptive hydropneumatic pulsation damper |
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 |
US6632076B2 (en) * | 1997-10-15 | 2003-10-14 | Matsushita Refrigeration Company | Oscillation-type compressor |
US6857858B2 (en) * | 2000-01-21 | 2005-02-22 | Lg Electronics Inc. | Device and method for controlling piston position in linear compressor |
US20050160752A1 (en) * | 2004-01-23 | 2005-07-28 | Nanocoolers, Inc. | Apparatus and methodology for cooling of high power density devices by electrically conducting fluids |
US20050254971A1 (en) * | 2002-04-08 | 2005-11-17 | Ikuo Ohya | Electromagnetic vibrating type diaphragm pump |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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. |
JP2002021715A (en) * | 2000-07-10 | 2002-01-23 | Matsushita Electric Ind Co Ltd | Device and method for feeding fluid |
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 |
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
Patent Citations (12)
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 |
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 |
US4928656A (en) * | 1987-12-09 | 1990-05-29 | Weber S.R.L. | Fuel-injection pump with variable cylinder capacity for diesel engine injection systems |
US5106267A (en) * | 1989-05-16 | 1992-04-21 | Nitto Kohki Co., Ltd. | Outlet pressure control system for electromagnetic reciprocating pump |
US5106268A (en) * | 1989-05-16 | 1992-04-21 | Nitto Kohki Co., Ltd. | Outlet pressure control system for electromagnetic reciprocating pump |
US5797430A (en) * | 1993-06-04 | 1998-08-25 | Mercedes-Benz Ag | Adaptive hydropneumatic pulsation damper |
US6632076B2 (en) * | 1997-10-15 | 2003-10-14 | Matsushita Refrigeration Company | Oscillation-type compressor |
US6857858B2 (en) * | 2000-01-21 | 2005-02-22 | Lg Electronics Inc. | Device and method for controlling piston position in linear compressor |
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 |
US20050254971A1 (en) * | 2002-04-08 | 2005-11-17 | Ikuo Ohya | Electromagnetic vibrating type diaphragm pump |
US20050160752A1 (en) * | 2004-01-23 | 2005-07-28 | Nanocoolers, Inc. | Apparatus and methodology for cooling of high power density devices by electrically conducting fluids |
Non-Patent Citations (1)
Title |
---|
DE 10151885 A1 abstract;05-2003;Germany;FRANK, KURT * |
Also Published As
Publication number | Publication date |
---|---|
EP2179180B1 (en) | 2018-11-07 |
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SUNTEC INDUSTRIES FRANCE, FRANCE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GRESARD, PASCAL;REEL/FRAME:038432/0356 Effective date: 19900301 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |