EP1797338A1 - Zweistufiges servoventil - Google Patents
Zweistufiges servoventilInfo
- Publication number
- EP1797338A1 EP1797338A1 EP05797287A EP05797287A EP1797338A1 EP 1797338 A1 EP1797338 A1 EP 1797338A1 EP 05797287 A EP05797287 A EP 05797287A EP 05797287 A EP05797287 A EP 05797287A EP 1797338 A1 EP1797338 A1 EP 1797338A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- stage
- servo
- bridge circuit
- switching points
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/006—Hydraulic "Wheatstone bridge" circuits, i.e. with four nodes, P-A-T-B, and on-off or proportional valves in each link
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3144—Directional control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
- F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/355—Pilot pressure control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/526—Pressure control characterised by the type of actuation electrically or electronically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/575—Pilot pressure control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
- F15B2211/8633—Pressure source supply failure
-
- 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
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/86582—Pilot-actuated
-
- 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
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/86582—Pilot-actuated
- Y10T137/8659—Variable orifice-type modulator
-
- 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
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/86582—Pilot-actuated
- Y10T137/86614—Electric
Definitions
- the invention relates to a two-stage servo valve with a first stage in which four flow resistances, of which at least one flow resistance is variable, are arranged in a bridge circuit, wherein twostandlie ⁇ ing circuit points of the bridge circuit are connected to incoming air or exhaust air and between the other two Schal ⁇ points a variable in magnitude and sign pressure difference is ready, and with a second stage in which an ⁇ of the pressure difference operable control piston is arranged an ⁇ , which controls a three-way valve.
- Such a servo valve known from DE 41 35 822 A1 contains, in a first stage, up to four individual piezoelectric valves which are arranged in a bridge circuit all four, or in the case of a lesser number together with fixed resistors. Each piezo valve contains its own controllable piezo element, which forms a controllable flow resistance together with a baffle plate.
- the bridge circuit serves to generate a variable in magnitude and sign Druck ⁇ difference, with the control valve in a further stage of the servo valve and a three-way valve can be adjusted via this, which in turn serves to adjust a Hy ⁇ draulikzylinders.
- DE 42 Ol 442 Al shows an alternative embodiment for the three-way valve that may be constructed consisting, in known manner as a slide valve, rotary valve or individual valves, for ⁇ In game flap valves.
- Servo valves are used in many areas of technology, including electropneumatic positioners, which are used to control the operation of process valves. When the electrical energy fails, it is often required that the drive controlled by the positioner automatically brings the process valve into a safe position, usually "open” or "close”.
- the invention has for its object to enable the simplest means in case of failure of the electrical energy holding the current position of the controlled by the servo valve process valve.
- the object is achieved in that in the servo valve of the type specified, the pressure ⁇ difference providing nodes are connected to each other via a Magnet ⁇ valve, which is closed in the controlled Zu ⁇ and is ge ⁇ opens in non-controlled state while pneumatically connecting the circuit points.
- the two-stage servo valve 1 contains in a first stage 2 four flow resistances 3, 4, 5, 6, which are arranged in a bridge ⁇ circuit 7.
- the flow resistances 5 and 6 are designed as piezo valves and can be changed in opposite directions by an electrical control voltage.
- the bridge circuit 7 is connected to supply air Pz or exhaust air E at two opposite circuit points 8, 9.
- a control piston 13 arranged in a second stage 12 of the servo valve 1 is displaceable and controls a three-way valve 16 lying between the supply and exhaust air Pz, E and the drive 14 of a process valve 15.
- the drive 14 is connected either to the supply air Pz or the exhaust air E and thus adjusts the process valve 15 in the direction "close” or "open".
- the drive 14 is separated from the supply or exhaust air Pz, E and remains in the respective current position.
- the three-way valve 16 In order to achieve that in case of failure of the electrical Energy ⁇ the three-way valve 16 supply occupying the middle position and so the drive 14 or the process valve has 15 grommets into the ak ⁇ position between the circuit points 10 and 11 of the bridge circuit 7 is disposed a solenoid valve 17 , which is driven by the operating voltage U B and is closed. In case of failure of the operating voltage U B opens the solenoid valve 17 and closes the circuit points 10 and 11 pneumatically short. As a result, the three-way valve 16 assumes its middle position.
- the piezo valves 5, 6 and the three-way valve 16 may be formed in different ways from ⁇ , as this is defined in the references cited in the introduction to the bung descrip ⁇ for example.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Servomotors (AREA)
- Fluid-Pressure Circuits (AREA)
- Fluid-Driven Valves (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410048689 DE102004048689B3 (de) | 2004-10-06 | 2004-10-06 | Zweistufiges Servoventil |
PCT/EP2005/055030 WO2006037793A1 (de) | 2004-10-06 | 2005-10-05 | Zweistufiges servoventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1797338A1 true EP1797338A1 (de) | 2007-06-20 |
EP1797338B1 EP1797338B1 (de) | 2008-08-20 |
Family
ID=35034359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20050797287 Not-in-force EP1797338B1 (de) | 2004-10-06 | 2005-10-05 | Zweistufiges servoventil |
Country Status (5)
Country | Link |
---|---|
US (1) | US7757714B2 (de) |
EP (1) | EP1797338B1 (de) |
CN (1) | CN100526659C (de) |
DE (2) | DE102004048689B3 (de) |
WO (1) | WO2006037793A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090283160A1 (en) | 2008-05-02 | 2009-11-19 | James Fishwick | Fluid flow control device and control circuit |
DE102009030888A1 (de) * | 2009-06-29 | 2010-12-30 | Robert Bosch Gmbh | Ventilanordnung |
DE102011007629B3 (de) * | 2011-04-18 | 2012-09-27 | Siemens Aktiengesellschaft | Elektropneumatischer Stellungsregler |
US9644761B2 (en) | 2011-09-30 | 2017-05-09 | General Electric Company | Desalination system with energy recovery and related pumps, valves and controller |
US9387440B2 (en) | 2011-09-30 | 2016-07-12 | General Electric Company | Desalination system with energy recovery and related pumps, valves and controller |
US9897080B2 (en) | 2012-12-04 | 2018-02-20 | General Electric Company | Rotary control valve for reverse osmosis feed water pump with energy recovery |
US9638179B2 (en) | 2012-12-04 | 2017-05-02 | General Electric Company | Hydraulic control system for a reverse osmosis hydraulic pump |
DE102017207414A1 (de) * | 2017-05-03 | 2018-11-08 | Festo Ag & Co. Kg | Pneumatische Steuervorrichtung und damit ausgestattete Prozesssteuervorrichtung |
CN113359559B (zh) * | 2021-06-15 | 2022-03-29 | 威海新北洋技术服务有限公司 | 控制电路及储物装置 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1913516A (en) * | 1929-07-25 | 1933-06-13 | I P Morris And De La Vergne In | Governor system |
US2605079A (en) * | 1946-06-19 | 1952-07-29 | Elliott Bay Mill Co | Piston valve |
US2886009A (en) * | 1955-11-29 | 1959-05-12 | Northrop Aircraft Inc | Electro-hydraulic servo assembly with fail-safe structure |
US2941515A (en) * | 1956-02-13 | 1960-06-21 | Moog Servocontrols Inc | Dual input servo valve |
US2924241A (en) * | 1956-11-30 | 1960-02-09 | Ex Cell O Corp | Electro hydraulic servo valve |
US3282552A (en) * | 1963-08-28 | 1966-11-01 | Sr Julian J Sommese | Hydraulic valve and control means therefor |
CH528693A (de) * | 1970-09-01 | 1972-09-30 | Sulzer Ag | Sicherheitsvorrichtung mit einem Ventil, vorzugsweise Absperrventil |
US3712339A (en) * | 1970-11-10 | 1973-01-23 | Rexroth G Lohrer Eisenwerk Gmb | Regulating apparatus with throttle gaps |
JPS50153321A (de) * | 1974-05-31 | 1975-12-10 | ||
FR2453306B1 (fr) * | 1979-04-06 | 1986-03-14 | Dba | Dispositif d'actionnement hydraulique a cinq positions |
US4852850A (en) * | 1987-05-14 | 1989-08-01 | Westinghouse Electric Corp. | Valve system with adjustable seating force |
JP2532081B2 (ja) * | 1987-01-30 | 1996-09-11 | 日産自動車株式会社 | パワ−ステアリングの油圧制御装置 |
US4883091A (en) * | 1988-12-27 | 1989-11-28 | Ross Operating Valve Company | Multi-port self-regulating proportional pressure control valve |
DE4135822C2 (de) * | 1991-02-14 | 1998-04-09 | Rexroth Mannesmann Gmbh | Vorrichtung zur Erzeugung eines hydraulischen Signals entsprechend einem elektrischen Signal |
DE4201442A1 (de) * | 1992-01-21 | 1995-01-05 | Wolfgang Offenwanger | Elektronisch geregeltes direkt betätigtes 3-Wege-Druckregelventil für gasförmige und flüssige Medien |
AT407432B (de) * | 1998-03-18 | 2001-03-26 | Hygrama Ag | Piezoelektrisches ventil |
US7228781B2 (en) * | 2002-05-24 | 2007-06-12 | Metso Lindemann Gmbh | Hydraulic control in a hydraulic system, especially for the operation of scrap cutters |
JP2007522020A (ja) * | 2004-02-10 | 2007-08-09 | コンティネンタル・テーベス・アクチエンゲゼルシヤフト・ウント・コンパニー・オッフェネ・ハンデルスゲゼルシヤフト | 車両ステアリング装置 |
DE102004035844B3 (de) | 2004-07-23 | 2005-10-20 | Siemens Ag | Servoventil |
DE102004038380B4 (de) * | 2004-08-06 | 2013-04-04 | Bosch Rexroth Aktiengesellschaft | Pilotventil, insbesondere für Servoventile |
-
2004
- 2004-10-06 DE DE200410048689 patent/DE102004048689B3/de not_active Expired - Fee Related
-
2005
- 2005-10-05 DE DE200550005145 patent/DE502005005145D1/de active Active
- 2005-10-05 WO PCT/EP2005/055030 patent/WO2006037793A1/de active IP Right Grant
- 2005-10-05 CN CNB200580033764XA patent/CN100526659C/zh not_active Expired - Fee Related
- 2005-10-05 EP EP20050797287 patent/EP1797338B1/de not_active Not-in-force
- 2005-10-05 US US11/664,740 patent/US7757714B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2006037793A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20080066814A1 (en) | 2008-03-20 |
DE102004048689B3 (de) | 2005-10-20 |
EP1797338B1 (de) | 2008-08-20 |
WO2006037793A1 (de) | 2006-04-13 |
CN100526659C (zh) | 2009-08-12 |
CN101035990A (zh) | 2007-09-12 |
DE502005005145D1 (de) | 2008-10-02 |
US7757714B2 (en) | 2010-07-20 |
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