EP1565905A2 - Method and device for cooling ultrasonic transducers - Google Patents
Method and device for cooling ultrasonic transducersInfo
- Publication number
- EP1565905A2 EP1565905A2 EP03767582A EP03767582A EP1565905A2 EP 1565905 A2 EP1565905 A2 EP 1565905A2 EP 03767582 A EP03767582 A EP 03767582A EP 03767582 A EP03767582 A EP 03767582A EP 1565905 A2 EP1565905 A2 EP 1565905A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow
- coolant
- transducer
- cooling liquid
- cooling
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 21
- 239000002826 coolant Substances 0.000 claims description 49
- 239000000110 cooling liquid Substances 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 6
- 230000009969 flowable effect Effects 0.000 claims 1
- 239000012809 cooling fluid Substances 0.000 abstract 2
- 230000017525 heat dissipation Effects 0.000 description 14
- 238000002604 ultrasonography Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
- B06B1/0611—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements in a pile
Definitions
- the invention relates to a method and a device for cooling ultrasonic transducers with the features mentioned in the preambles of claims 1 and 6.
- EP 0553804 A2 discloses a cooling system for a high-frequency ultrasound transducer, which is based on the principle of heat conduction.
- a heat sink in the form of a heat sink is located behind the ultrasound transducer.
- the heat sink is in turn connected to a housing by means of a thermally conductive resin.
- the heat is first transferred from the converter into the heat sink and from there via the resin into the surrounding housing, where the heat is ultimately released into the surrounding air.
- This type of cooling is inadequate for high outputs and cannot be used for high amplitudes of several micrometers, because this results in a high energy input into the resin.
- cooling systems for ultrasonic transducers are based only on heat dissipation through the openings of a housing surrounding the transducer by means of convection (e.g. SONOPULS HD 60, BANDELIN electronic GmbH & Co. KG). This type of cooling is also not sufficient for high outputs.
- the heat pipe as a channel is wholly or partially molded into the material surrounding the transducer in order to achieve the largest possible contact surface.
- the coolant does not flow through the transducer, but through a cooling system in contact with the transducer.
- heat dissipation is insufficient for high performance.
- WO 0008630 AI an arrangement for heat dissipation, in particular for ultrasonic transducers of high power, is known from WO 0008630 AI.
- the heat dissipation is based on the combination of heat conduction and convection.
- the surface of the transducer body is provided with a vibration-absorbing layer, which reduces the mechanical friction losses during heat transfer.
- a heat sink is arranged on this layer, from which the heat can be removed by means of a coolant by convection.
- the disadvantage of this arrangement is that the temperature gradients created by the layer transitions reduce the efficiency in heat dissipation.
- the invention has for its object to provide a method and a device for cooling ultrasonic transducers, which are characterized by a more effective heat dissipation of the heat generated by power losses than previously known and thus reliably and economically ensure the continuous operation of ultrasonic transducers at high power.
- this object is achieved by a method having the features mentioned in claim 1 and a device having the features mentioned in claim 8.
- the method according to the invention for cooling ultrasonic transducers is characterized in that a cooling liquid introduced under pressure flows through and / or flows around the body of the ultrasonic transducer.
- a cooling liquid introduced under pressure flows through and / or flows around the body of the ultrasonic transducer.
- the heat generated in the transducers is dissipated directly by convection. No heat conduction via cooling elements is required.
- the heat dissipation achieved is considerably more effective than in the known methods, so that the continuous operation of ultrasonic transducers of high power can be guaranteed with the means according to the invention.
- the pressure of the cooling liquid is dimensioned such that the cavitation is reduced or avoided.
- the pressure is preferably set in a range from 2 to 20 bar. 5 bar is particularly preferably provided. This advantageously has the effect that the risk of damage to the device due to cavitation is significantly reduced and that an additional power input through cavitation generation is reduced or avoided.
- the pressure of the cooling liquid can be generated by the dimensioning of flow channels and / or by gas pressure.
- the flow through the body of the ultrasound transducer from the inner region to the outer region, the liquid pressure being built up in the inner region and the cooling liquid flowing off via the housing, or from the outer region to the inner region, the pressure being built up in the outer region and the coolant flows out over the interior, is realized.
- the throughflow takes place in such a way that pressure is built up both inside and outside in order to avoid cavitation, a pressure gradient between the inside and outside being necessary for the flow of the cooling liquid.
- the body of the ultrasound transducer is flowed around in the interior and / or in the exterior, since this removes heat from the transducer surface by convection.
- the interior is in particular the cavity between the tension rod and the converter body, the exterior, in particular the space between the converter body and the housing.
- the cooling liquid is an electrically non-conductive liquid, since this avoids electrical short circuits.
- the device according to the invention for cooling ultrasonic transducers is characterized in that the device consists of at least one piezo package and at least two cylindrical transducer bodies, which together with the piezo package form a ⁇ / 2 oscillator, with two transducer bodies in each case in the case of multiple arrangements of transducers common transducer bodies can be combined and wherein at least one of the at least two transducer bodies has at least one through-flow channel, through which cooling liquid introduced under pressure can flow.
- the heat generated in the transducers can be dissipated directly by convection. No heat conduction via cooling elements is required.
- a large common contact surface between transducers and coolant can be realized with the means according to the invention.
- the heat dissipation achieved is considerably more effective than in the known methods, so that the continuous operation of ultrasonic transducers of high power can be guaranteed with the means according to the invention.
- the pressure of the cooling liquid is dimensioned such that the cavitation can be reduced or avoided.
- the pressure is preferably set in a range from 2 to 20 bar. 5 bar is particularly preferably provided. This is advantageous achieved that the risk of damage to the device by cavitation is significantly reduced and that an additional power input by cavitation generation is reduced or avoided.
- At least one through-flow channel is slot-shaped, since this enables a large common contact surface between the converter body and the coolant to be achieved. This leads to a higher efficiency in heat dissipation.
- the device comprises a tension rod arranged in a cavity of the at least two transducer bodies with at least two openings and at least one guide channel through which the cooling liquid introduced under pressure can flow. In this way, a particularly simple to implement and even supply of the coolant into the cavity is achieved.
- the cooling liquid can be supplied via the at least one guide channel and can be removed via the at least one flow channel. It is also preferably provided that the cooling liquid can be supplied via the at least one flow channel and can be removed via the at least one guide channel in the tensioning rod. In this way, there is a particularly easy-to-use and implementable possibility of flowing through the converter body from the inside to the outside or from the outside to the inside.
- the device comprises a liquid-tight housing. The housing serves on the one hand to protect the active elements of the converter and furthermore offers a particularly favorable possibility of taking up and guiding the coolant.
- the device comprises a flange which is connected to the housing and / or a horn and / or a final mass.
- the flange enables the housing to be fastened in a particularly simple manner.
- the horn provides a particularly favorable connection possibility with a sonotrode.
- the device has at least one connection device for a coolant line, through which the coolant can flow into the cavity of the converter body and / or can be removed from the cavity.
- the device has at least one connection device for a coolant line, through which the coolant can flow into the at least one guide channel and / or can be removed from the at least one guide channel.
- connection device for a coolant line through which the coolant can flow into the at least one guide channel and / or can be removed from the at least one guide channel.
- At least one of the at least two transducer bodies can flow around the cooling liquid at least partially on the inner surface and / or at least partially on the outer surface. In this way, effective heat dissipation from the converter bodies is achieved by convection.
- the converter bodies have no throughflow channels.
- the converter bodies are only flowed around, the interior being connected to the exterior by a connecting channel.
- Figure 1 is a schematic sectional view of an ultrasonic transducer with a device for cooling with an axially arranged inlet for coolant
- Figure 2 is a schematic sectional view of an ultrasonic transducer with a device for cooling with two radially arranged inlets for coolant
- Figure 3 is a schematic sectional view of an ultrasonic transducer with a device for cooling without flow channels and with a connecting channel.
- FIG. 1 schematically shows the longitudinal section of an ultrasound transducer with an embodiment of the device according to the invention for cooling the ultrasound transducer.
- the ultrasound transducer is constructed from cylindrical transducer bodies 5, 6, each with piezo packs 4 arranged on the end face between two transducer bodies 5, 6, some of the transducer bodies 5, 6 being designed as common transducer bodies 6, each having a piezo pack 4 arranged on the end faces thereof.
- Each piezo pack 4 forms a ⁇ / 2 oscillator with one of the transducer bodies 5 and half of one of the common transducer bodies 6 or with each half of two common transducer bodies 6.
- the converter bodies 5, 6 have flow channels 7 in the radial direction.
- Transducer bodies 5, 6 and piezo packs 4 are alternately lined up on a tie rod 3 with end threads.
- the arrangement is fixed and tensioned with the aid of two threaded end masses 10 which are arranged on opposite ends of the tensioning bar 3 and which are each screwed onto an end thread of the tensioning bar 3.
- the tie rod 3 has a guide channel 13 for coolant, at one end of which there is a connection device for a coolant line 1, which forms the inlet 1 for the coolant.
- the tie rod has an outlet opening for the cooling liquid flowing out of the guide channel into the cavity 11 of the converter body.
- the opposite end mass 10 is connected to a horn 8 which connects the offers the possibility of a sonotrode and is used to transmit the mechanical vibrations generated by the transducer.
- the device is provided with a liquid-tight housing 12 for receiving the cooling liquid, which is connected to a flange 9, which offers a possibility for mounting in an external system.
- the flange 9 is connected to the horn 8.
- the flange 9 has a connection device for a coolant line 2, which forms the outlet 2 for the coolant from the housing 12.
- the coolant line for the inlet 1 is guided through the housing 12.
- the coolant is introduced under pressure into the guide channel 13 of the tie rod 3 via the inlet 1.
- the cooling liquid is fed to the cavity 11 of the converter body via the guide channel 13, where. the coolant flows through the converter bodies in order to ultimately flow through the flow channels 7 of the converter bodies 5, 6. In this way, the heat generated by the transducers is transferred directly to the coolant by convection.
- the cooling liquid emerging from the flow channels 7 is collected in the housing 12 and discharged from the device via the outlet 2. In this way, a more effective cooling of the ultrasonic transducer is achieved than in the known methods. With the aid of the means according to the invention, the continuous operation of ultrasonic transducers of high power is also guaranteed.
- Openings for example circular bores, can be provided at the ends of the flow channels 7 in order to increase the service life of the converter bodies and / or to achieve an effective flow through the flow channels 7 designed as slots.
- the diameter of the bores is advantageously larger than the width of the slots.
- Figure 2 shows schematically the longitudinal section of the structure of an ultrasonic transducer with a further embodiment of the device according to the invention for cooling the ultrasonic transducer, which corresponds essentially to that shown in Figure 1.
- there are two inlets 1 for the cooling liquid each of which is arranged radially and is guided from the outside through the housing 12 and the end masses 10 into the cavity 11 between the tension rod 3 and converter body 5, 6.
- connection devices 1 for connecting the coolant lines to the cavity 11 are thus arranged at the opposite ends of the converter. In this way, the cooling liquid is introduced from the opposite ends under pressure into the cavity 11 and discharged through the flow channels 7. This advantageously results in a more uniform heat dissipation over the entire length of the device than in FIG. 1. An even more effective cooling of the ultrasound transducer is thus achieved than with the exemplary embodiment shown in FIG.
- FIG. 3 shows a further embodiment variant of the invention, in which the converter bodies 5, 6 have no through-flow channels 7. However, the interior 11 is connected to the exterior 14 via a connecting duct 15.
- the cooling liquid is supplied via the inlet 1, enters the interior 11 via the guide channel 13, flows around and cools the transducer bodies 5, 6, leaves the interior 11 via the connecting channel 15 and becomes via the exterior 14 and the outlet 2 dissipated.
- the inside of the converter bodies 5, 6 is cooled.
- the gas pressure nozzle 6 in the housing is used 12 generates a gas pressure, which in this embodiment is 6 bar.
- connection device for coolant lines inlet housing inlet Connection device for coolant lines, outlet tie rod piezo package transducer body common transducer body flow channel Hörn flange final mass cavity, interior liquid-tight housing guide channel outer space connecting channel gas pressure connector ring line
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Surgical Instruments (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10254894A DE10254894B3 (en) | 2002-11-20 | 2002-11-20 | Cooling device for ultrasonic transducers has cooling fluid passed through flow channels at defined pressure for reducing or preventing cavitation |
DE10254894 | 2002-11-20 | ||
PCT/EP2003/013003 WO2004047073A2 (en) | 2002-11-20 | 2003-11-19 | Method and device for cooling ultrasonic transducers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1565905A2 true EP1565905A2 (en) | 2005-08-24 |
EP1565905B1 EP1565905B1 (en) | 2011-10-05 |
Family
ID=32185938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03767582A Expired - Lifetime EP1565905B1 (en) | 2002-11-20 | 2003-11-19 | Method and device for cooling ultrasonic transducers |
Country Status (9)
Country | Link |
---|---|
US (1) | US8004158B2 (en) |
EP (1) | EP1565905B1 (en) |
JP (1) | JP4739759B2 (en) |
KR (1) | KR101248716B1 (en) |
CN (1) | CN1739137A (en) |
AT (1) | ATE527651T1 (en) |
AU (1) | AU2003292052A1 (en) |
DE (1) | DE10254894B3 (en) |
WO (1) | WO2004047073A2 (en) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
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DE10254894B3 (en) * | 2002-11-20 | 2004-05-27 | Dr. Hielscher Gmbh | Cooling device for ultrasonic transducers has cooling fluid passed through flow channels at defined pressure for reducing or preventing cavitation |
EP1868182A1 (en) * | 2006-06-14 | 2007-12-19 | Telsonic Holding AG | Ultrasonic generator with cooling-fluid, a welding system, and a method for operating an ultrasonic generator |
US8475375B2 (en) * | 2006-12-15 | 2013-07-02 | General Electric Company | System and method for actively cooling an ultrasound probe |
US7879200B2 (en) * | 2007-07-05 | 2011-02-01 | Nevada Heat Treating, Inc. | Ultrasonic transducer and horn used in oxidative desulfurization of fossil fuels |
US7790002B2 (en) * | 2007-07-05 | 2010-09-07 | Nevada Heat Treating, Inc. | Ultrasonic transducer and horn used in oxidative desulfurization of fossil fuels |
FR2929040B1 (en) * | 2008-03-18 | 2010-04-23 | Super Sonic Imagine | INSONIFYING DEVICE HAVING AN INTERNAL COOLING CHAMBER |
US20100191113A1 (en) * | 2009-01-28 | 2010-07-29 | General Electric Company | Systems and methods for ultrasound imaging with reduced thermal dose |
RU2452872C2 (en) | 2010-07-15 | 2012-06-10 | Андрей Леонидович Кузнецов | Piezoelectric pump |
CN104620374A (en) * | 2012-04-03 | 2015-05-13 | 西门子公司 | Cooling device |
DE102012014892A1 (en) * | 2012-07-27 | 2014-01-30 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Actuator and method for reheating a Festkörperaktors housed in an actuator with an actuator |
CN106661535B (en) * | 2014-01-21 | 2021-03-02 | 普罗美迪卡生物电子学公司 | Apparatus for ultrasonic testing |
RU2665744C2 (en) * | 2014-03-31 | 2018-09-04 | Общество С Ограниченной Ответственностью "Рэнк" | Device for the mechanical vibrations creating |
CN104148270A (en) * | 2014-08-05 | 2014-11-19 | 曹学良 | Energy converter connecting mode suitable for anti-explosion environment |
CN106139426A (en) * | 2015-04-16 | 2016-11-23 | 金相植 | There is ultrasonic operation handpiece and the device of liquid-cooling system |
US11039814B2 (en) | 2016-12-04 | 2021-06-22 | Exo Imaging, Inc. | Imaging devices having piezoelectric transducers |
RU2667476C2 (en) * | 2016-12-05 | 2018-09-20 | Общество с Ограниченной Ответственностью "РЭНК" ООО "РЭНК" | Stepper piezoelectric motor |
CN108333574B (en) * | 2017-12-22 | 2022-09-06 | 中国船舶重工集团公司第七一五研究所 | Underwater acoustic transducer covered by special space |
US10648852B2 (en) | 2018-04-11 | 2020-05-12 | Exo Imaging Inc. | Imaging devices having piezoelectric transceivers |
US10656007B2 (en) | 2018-04-11 | 2020-05-19 | Exo Imaging Inc. | Asymmetrical ultrasound transducer array |
JP2022500094A (en) | 2018-09-25 | 2022-01-04 | エクソ イメージング,インコーポレイテッド | Imaging device with selectively changeable characteristics |
CN109513598B (en) * | 2018-12-28 | 2023-09-19 | 深圳先进技术研究院 | Backing structure, manufacturing method of backing structure and ultrasonic transducer |
CN110479687B (en) * | 2019-08-01 | 2022-04-15 | 合肥国轩高科动力能源有限公司 | Ultrasonic cleaning device for power battery aluminum shell |
JP2023511802A (en) | 2019-09-12 | 2023-03-23 | エコー イメージング,インク. | Increased MUT Coupling Efficiency and Bandwidth Via End Grooves, Virtual Pivots, and Unconstrained Boundaries |
WO2021068064A1 (en) | 2019-10-10 | 2021-04-15 | Sunnybrook Research Institute | Systems and methods for cooling ultrasound transducers and ultrasound transducer arrays |
CN111111583A (en) * | 2019-12-17 | 2020-05-08 | 湖州师范学院 | Multi-ultrasonic coupling reinforced high-viscosity organic waste pyrolysis carbonization device |
IL311310A (en) | 2020-03-05 | 2024-05-01 | Exo Imaging Inc | Ultrasonic imaging device with programmable anatomy and flow imaging |
CN112370595B (en) * | 2020-11-13 | 2023-04-14 | 武汉盛大康成医药科技有限公司 | Multifunctional debridement instrument |
US11819881B2 (en) | 2021-03-31 | 2023-11-21 | Exo Imaging, Inc. | Imaging devices having piezoelectric transceivers with harmonic characteristics |
US11951512B2 (en) | 2021-03-31 | 2024-04-09 | Exo Imaging, Inc. | Imaging devices having piezoelectric transceivers with harmonic characteristics |
DE102021123704A1 (en) | 2021-09-14 | 2023-03-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | ULTRASOUND TRANSDUCER, METHOD OF MANUFACTURE OF ULTRASOUND TRANSDUCER AND DEVICE FOR MEDICAL THERAPY WITH HIGH INTENSITY FOCUSED ULTRASOUND |
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FR2665844B1 (en) * | 1990-08-20 | 1996-02-09 | Cogema | TREATMENT OF AGGLOMERATES OF SOLID PARTICLES SUSPENDED IN A LIQUID IN ORDER TO OBTAIN A CIRCULATING MIXTURE WITHOUT DEPOSITS. |
JPH04181041A (en) * | 1990-11-16 | 1992-06-29 | Toyota Motor Corp | Vibration reduction device for vehicle |
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US5955823A (en) | 1998-05-12 | 1999-09-21 | Ultra Sonus Ab | High power ultrasonic transducer |
US5936163A (en) * | 1998-05-13 | 1999-08-10 | Greathouse; John D. | Portable high temperature ultrasonic testing (UT) piezo probe with cooling apparatus |
DE19836229C1 (en) | 1998-08-04 | 2000-03-23 | Hielscher Gmbh | Arrangement for heat dissipation, especially for high-power ultrasonic transducers |
DE19837262A1 (en) | 1998-08-17 | 2000-03-09 | Kari Richter | Combined ultrasound and X-ray device for breast examination; has maximum ultrasonic coupling liquid depth at ultrasonic transducer height, where liquid may be remove for X-ray investigation |
DE10027264C5 (en) * | 2000-05-31 | 2004-10-28 | Dr. Hielscher Gmbh | ultrasound transducer |
DE10254894B3 (en) * | 2002-11-20 | 2004-05-27 | Dr. Hielscher Gmbh | Cooling device for ultrasonic transducers has cooling fluid passed through flow channels at defined pressure for reducing or preventing cavitation |
-
2002
- 2002-11-20 DE DE10254894A patent/DE10254894B3/en not_active Expired - Fee Related
-
2003
- 2003-11-19 JP JP2004552670A patent/JP4739759B2/en not_active Expired - Fee Related
- 2003-11-19 AT AT03767582T patent/ATE527651T1/en active
- 2003-11-19 CN CNA2003801086103A patent/CN1739137A/en active Pending
- 2003-11-19 US US10/535,868 patent/US8004158B2/en active Active
- 2003-11-19 EP EP03767582A patent/EP1565905B1/en not_active Expired - Lifetime
- 2003-11-19 WO PCT/EP2003/013003 patent/WO2004047073A2/en active Application Filing
- 2003-11-19 KR KR1020057009107A patent/KR101248716B1/en active IP Right Grant
- 2003-11-19 AU AU2003292052A patent/AU2003292052A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2004047073A2 * |
Also Published As
Publication number | Publication date |
---|---|
KR20050075035A (en) | 2005-07-19 |
WO2004047073A2 (en) | 2004-06-03 |
JP4739759B2 (en) | 2011-08-03 |
CN1739137A (en) | 2006-02-22 |
JP2006506633A (en) | 2006-02-23 |
WO2004047073A3 (en) | 2004-09-10 |
DE10254894B3 (en) | 2004-05-27 |
ATE527651T1 (en) | 2011-10-15 |
EP1565905B1 (en) | 2011-10-05 |
US20060126884A1 (en) | 2006-06-15 |
AU2003292052A1 (en) | 2004-06-15 |
US8004158B2 (en) | 2011-08-23 |
KR101248716B1 (en) | 2013-03-28 |
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