WO2004025094A1 - Systeme de refroidissement pour vehicule et vehicule comprenant ledit systeme de refroidissement - Google Patents

Systeme de refroidissement pour vehicule et vehicule comprenant ledit systeme de refroidissement Download PDF

Info

Publication number
WO2004025094A1
WO2004025094A1 PCT/SE2003/001158 SE0301158W WO2004025094A1 WO 2004025094 A1 WO2004025094 A1 WO 2004025094A1 SE 0301158 W SE0301158 W SE 0301158W WO 2004025094 A1 WO2004025094 A1 WO 2004025094A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
circuit
cooling circuit
cooling system
vehicle
Prior art date
Application number
PCT/SE2003/001158
Other languages
English (en)
Inventor
Magnus Bergström
Fredrik Grop
Pontus Evertsson
Original Assignee
Volvo Construction Equipment Holding Sweden Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volvo Construction Equipment Holding Sweden Ab filed Critical Volvo Construction Equipment Holding Sweden Ab
Priority to AU2003244290A priority Critical patent/AU2003244290A1/en
Priority to BR0314260-4A priority patent/BR0314260A/pt
Priority to EP03795514A priority patent/EP1552122A1/fr
Priority to JP2004535312A priority patent/JP2005539169A/ja
Publication of WO2004025094A1 publication Critical patent/WO2004025094A1/fr
Priority to US10/906,943 priority patent/US6945200B2/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler
    • F01P2060/045—Lubricant cooler for transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F01P7/044—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using hydraulic drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control

Definitions

  • Cooling system for a vehicle and vehicle comprising the cooling system
  • the present invention relates to a cooling system for a vehicle, the system comprising a first cooling circuit coupled to the vehicle engine for cooling the latter, a pump arranged in the first cooling circuit for pumping a coolant to the engine, a second cooling circuit for cooling at least one other component in the vehicle, and means of coupling the second cooling circuit into the first cooling circuit in order to also supply the second cooling circuit with coolant from the pump.
  • Such a cooling system may be used, for example, in a work vehicle, such as a wheel loader, which comprises hydraulic components in the form of working cylinders, for example, for maneuvering/moving an implement.
  • a work vehicle such as a wheel loader
  • hydraulic components in the form of working cylinders, for example, for maneuvering/moving an implement.
  • the hydraulics it is primarily the hydraulic oil and gaskets, seals, etc. which are temperature- sensitive.
  • the coupling means consists of a thermostat, which is operatively controlled by the engine temperature to cut in automatically when the engine temperature exceeds a certain value.
  • the cooling system may furthermore be designed to cool transmission components in the form of gears and shafts in the vehicle axle housings, for example, via the second cooling circuit.
  • a problem with this system is that under certain operating conditions the thermostat will not cut in, with the result that the transmission components do not receive the necessary cooling.
  • An example of this is in so-called leveling, when a mass of earth is pushed ahead of the vehicle. In this application the transmission becomes hot, whilst the engine is cold.
  • a further problem with the previously known system is that if the thermostat fails and does not or is not open, there is no cooling at all of the hydraulic or transmission components.
  • the temperature limit at which the thermostat cuts in is controlled by the engine exhaust. Owing to the ever more stringent requirements governing vehicle exhaust emissions, this temperature limit is also increasing. It is therefore not just simply a matter of adjusting the temperature limit for a specific vehicle to a lower value in order to also provide the second circuit with coolant.
  • the invention will be described below in its application to a work vehicle in the form of a wheel loader. This is to be regarded as a preferred application but is in no way limitative.
  • the invention can be realized, for example in other types of work vehicle, such as a dumper truck or excavator-loader, for example.
  • the invention is furthermore not confined to work vehicles, but could also be applied to other types of vehicle, such as industrial trucks.
  • An object of the invention is to provide a cooling system for a vehicle, which will remedy at least one of the aforementioned problems .
  • the cooling system comprises a line coupled from the first cooling circuit to the second cooling circuit bypassing the coupling means, so that the second cooling circuit is supplied with coolant from the pump via the bypass line even when the coupling means is set to the disconnected position.
  • the term disconnected position signifies that the coupling means is not set to connect the first and second circuits .
  • the coupling means is operatively controlled by the engine temperature in such a way that when the engine temperature exceeds a certain value the coupling means cuts in and connects the second cooling circuit to the first cooling circuit.
  • the coupling means in this case consists of a thermostat.
  • said component consists of a hydraulic component in the form, for example, of a working cylinder.
  • said component consists of a transmission component, such as a gear or shaft arranged in the vehicle transmission.
  • FIG 1 shows a side view of a wheel loader
  • FIG 2 shows a schematic diagram of the cooling system according to the invention.
  • FIG. 1 shows a wheel loader 1.
  • the body of the wheel loader 1 comprises a front body part 2 and a rear body part 3, these parts being joined to one another by an articulated connection.
  • the body parts 2,3 can be rotated in relation to one another about an articulated joint by means of two hydraulic components in the form of working cylinders 4,5 arranged between the two parts.
  • the working cylinders 4,5 are therefore designed for turning the wheel loader 1.
  • the wheel loader 1 furthermore has a load unit 6 and an implement in the form of a shovel 7 arranged on the load unit.
  • the load unit 6 can be raised and lowered in relation to the front part 2 of the vehicle by means of two hydraulic components in the form of two working cylinders 8,9, each of which is connected at one end to the front part of the vehicle 2 and at its other end to the load unit 6.
  • the shovel 7 can be tilted in relation to the load unit 6 by means of a further hydraulic component in the form of a working cylinder 10, which is connected by one end to the front part of the vehicle 2 and by its other end to the shovel 7.
  • Fig. 2 shows a schematic diagram of a cooling system 11 for the wheel loader 1.
  • the wheel loader 1 has an engine 12, which is designed to drive at least one rear drive axle 13.
  • the engine 12 consists of an internal combustion engine in the form of a diesel engine.
  • the cooling system 11 comprises a first cooling circuit 14 coupled to the vehicle engine 12 for cooling the latter.
  • the first cooling circuit 14 here consists of a type of internal circuit in the engine.
  • a pump 15 is arranged in the first cooling circuit 14 for pumping a coolant to the engine 12.
  • the cooling system 11 further comprises a second cooling circuit 16 for increased cooling of the engine 12 and for cooling the vehicle hydraulic components 4,5,8,9,10.
  • the cooling system 11 comprises a radiator 22 arranged in the second cooling circuit 16 for increased cooling of the engine 12.
  • a hydraulic motor 26 is connected to the hydraulic circuit 18 and designed to drive a fan in order to produce an air flow through the radiator 22.
  • a first heat-exchanger 27 is arranged in the second circuit 16 for an exchange of heat between the hydraulic oil in a first hydraulic circuit 18, which is in turn coupled to said hydraulic components (not shown in Fig. 2), and the coolant in the second cooling circuit 16. Cooling of the engine and the hydraulic components is therefore integrated into a single system, with a single pump.
  • the cooling system 11 comprises a second heat-exchanger 28, which is integrated with the first heat exchanger 27 in a single component 17.
  • the second heat exchanger is designed for an exchange of heat between transmission oil in a second hydraulic circuit 19, which is in turn coupled to a transmission component (not shown in Fig. 2), and the coolant in the second cooling circuit 16.
  • the transmission component may consist, for example, of a part that is intended to rotate, such as a shaft and/or a gear in a gearbox in the vehicle. Alternatively or in addition, the transmission component may consist of a part in one of the vehicle wheel axles . Cooling of the engine, the hydraulic components and the transmission components is therefore integrated in a single system, with a single pump.
  • the cooling system 11 further comprises means 20 for coupling the second cooling circuit 16 into the first cooling circuit 14 in order to also provide the second cooling circuit with coolant from the pump 15.
  • the coupling means 20 here consists of a thermostat.
  • the thermostat is controlled by the engine temperature, and more specifically by the coolant temperature.
  • the thermostat is designed to cut in, thereby bringing the second cooling circuit 16 into operation when the engine temperature exceeds a certain value .
  • the cooling system 11 further comprises a line 21 coupled from the first cooling circuit 14 to the second cooling circuit 16 bypassing the thermostat 20 and the engine 12, so that the second cooling circuit is supplied with coolant from the pump via the bypass line 21 even when the thermostat is in the disconnected position.
  • the bypass line 21 is therefore arranged in parallel with the thermostat 20 and the engine 12.
  • the bypass line 21 is designed for a substantially smaller flow than the first cooling circuit, with the object of ensuring that the second circuit 16 is supplied with a certain quantity of coolant even if the engine temperature does not reach the said value at which the thermostat cuts in.
  • the bypass line 21 is therefore designed for a smaller flow than the main line
  • the said hydraulic component may also consist, for example, of a hydraulic motor or a hydraulic pump.
  • the cooling system 11 comprises a further heat-exchanger 23, which can be connected to the first hydraulic circuit 18 for an exchange of heat with air.
  • a means 24 is designed for automatically bringing the further heat exchanger into operation when the hydraulic oil temperature exceeds a specific value.
  • the coupling means 24 consists of a temperature-controlled valve. This coupling means 24 is intended to cut in before the engine thermostat 20 cuts in.
  • cooling system 11 which is designed for cooling/heating multiple different sub-systems (engine, hydraulics, transmission) is that heat differentials can be utilized in order to cool a specific sub-system or to heat another sub- system.
  • the coolant consists at least substantially of water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Details Of Gearings (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

La présente invention concerne un système de refroidissement (11) destiné à un véhicule. Ledit système comprend un premier circuit de refroidissement (14) accouplé au moteur de véhicule (12) permettant le refroidissement de ce dernier et une pompe (15) placée dans le premier circuit de refroidissement (14) permettant le pompage d'un liquide de refroidissement vers le moteur. Ledit système comprend également un second circuit de refroidissement (16) permettant le refroidissement d'au moins un autre élément du véhicule, et un moyen (20) permettant l'accouplement du second circuit de refroidissement (16) au premier circuit de refroidissement (14) de manière à alimenter également le second circuit de refroidissement en liquide de refroidissement par la pompe (15). Le système de refroidissement comprend également un conduit (21) accouplé s'étendant du premier circuit de refroidissement au second circuit de refroidissement monté en dérivation par rapport au moyen d'accouplement (20) de sorte que le second circuit de refroidissement est alimenté en liquide de refroidissement par la pompe via le conduit de dérivation même lorsque le moyen d'accouplement est placé en position désaccouplée.
PCT/SE2003/001158 2002-09-13 2003-07-02 Systeme de refroidissement pour vehicule et vehicule comprenant ledit systeme de refroidissement WO2004025094A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU2003244290A AU2003244290A1 (en) 2002-09-13 2003-07-02 Cooling system for a vehicle and vehicle comprising the cooling system
BR0314260-4A BR0314260A (pt) 2002-09-13 2003-07-02 Sistema de refrigeração para um veìculo e veìculo compreendendo o sistema de refrigeração
EP03795514A EP1552122A1 (fr) 2002-09-13 2003-07-02 Systeme de refroidissement pour vehicule et vehicule comprenant ledit systeme de refroidissement
JP2004535312A JP2005539169A (ja) 2002-09-13 2003-07-02 車両用の冷却装置並びにその冷却装置を含む車両
US10/906,943 US6945200B2 (en) 2002-09-13 2005-03-14 Cooling system for a vehicle and a vehicle comprising the cooling system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0202724A SE523669C2 (sv) 2002-09-13 2002-09-13 Kylsystem till ett fordon och fordon innefattande kylsystemet
SE0202724-1 2002-09-13

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/906,943 Continuation US6945200B2 (en) 2002-09-13 2005-03-14 Cooling system for a vehicle and a vehicle comprising the cooling system

Publications (1)

Publication Number Publication Date
WO2004025094A1 true WO2004025094A1 (fr) 2004-03-25

Family

ID=20288987

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2003/001158 WO2004025094A1 (fr) 2002-09-13 2003-07-02 Systeme de refroidissement pour vehicule et vehicule comprenant ledit systeme de refroidissement

Country Status (9)

Country Link
EP (1) EP1552122A1 (fr)
JP (1) JP2005539169A (fr)
KR (1) KR20050075334A (fr)
CN (1) CN100346064C (fr)
AU (1) AU2003244290A1 (fr)
BR (1) BR0314260A (fr)
SE (1) SE523669C2 (fr)
WO (1) WO2004025094A1 (fr)
ZA (1) ZA200501388B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657416A1 (fr) * 2004-11-10 2006-05-17 AGCO GmbH Système de rafroidissement pour tracteurs
FR2890430A1 (fr) * 2005-09-05 2007-03-09 Peugeot Citroen Automobiles Sa Circuit de refroidissement de l'huile d'une boite de vitesses
EP2843243A1 (fr) * 2013-07-09 2015-03-04 The Boeing Company Systèmes et procédés pour l'équilibre et le transport thermique des systèmes hydrauliques d'aéronefs
US9644898B2 (en) 2013-07-09 2017-05-09 The Boeing Company Systems and methods for heat balance and transport for aircraft hydraulic systems

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4755572B2 (ja) * 2006-11-28 2011-08-24 カルソニックカンセイ株式会社 車両用蓄熱システム
FR2954405B1 (fr) * 2009-12-22 2012-01-13 Renault Sa Dispositif de refroidissement pour vehicule automobile
DE102010034484B4 (de) * 2010-08-17 2014-03-20 Schaeffler Technologies AG & Co. KG Kühlsystem mit einem Thermomanagementmodul
CN103562514B (zh) * 2011-05-20 2016-03-30 丰田自动车株式会社 流体控制系统
SE536283C2 (sv) * 2011-12-23 2013-07-30 Scania Cv Ab Arrangemang och förfarande för att kyla kylvätska i ett kylsystem i ett fordon
US8683854B2 (en) * 2012-03-30 2014-04-01 Ford Global Technologies, Llc Engine cooling system control

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682160A1 (fr) * 1991-10-07 1993-04-09 Renault Vehicules Ind Systeme de refroidissement pour moteur a combustion interne comportant deux parties distinctes de radiateur.
US5669338A (en) * 1996-04-15 1997-09-23 Caterpillar Inc. Dual circuit cooling systems
WO1999043931A1 (fr) * 1998-02-27 1999-09-02 Volvo Wheel Loaders Ab Systeme de refroidissement et de chauffage pour machine
WO2002062624A1 (fr) * 2001-02-07 2002-08-15 Volvo Construction Equipment Components Ab Systeme regulateur de temperature

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682160A1 (fr) * 1991-10-07 1993-04-09 Renault Vehicules Ind Systeme de refroidissement pour moteur a combustion interne comportant deux parties distinctes de radiateur.
US5669338A (en) * 1996-04-15 1997-09-23 Caterpillar Inc. Dual circuit cooling systems
WO1999043931A1 (fr) * 1998-02-27 1999-09-02 Volvo Wheel Loaders Ab Systeme de refroidissement et de chauffage pour machine
WO2002062624A1 (fr) * 2001-02-07 2002-08-15 Volvo Construction Equipment Components Ab Systeme regulateur de temperature

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657416A1 (fr) * 2004-11-10 2006-05-17 AGCO GmbH Système de rafroidissement pour tracteurs
GB2420175B (en) * 2004-11-10 2009-10-28 Agco Gmbh & Co Cooling system for farming tractors
FR2890430A1 (fr) * 2005-09-05 2007-03-09 Peugeot Citroen Automobiles Sa Circuit de refroidissement de l'huile d'une boite de vitesses
EP2843243A1 (fr) * 2013-07-09 2015-03-04 The Boeing Company Systèmes et procédés pour l'équilibre et le transport thermique des systèmes hydrauliques d'aéronefs
US9644648B2 (en) 2013-07-09 2017-05-09 The Boeing Company Systems and methods for heat balance and transport for aircraft hydraulic systems
US9644898B2 (en) 2013-07-09 2017-05-09 The Boeing Company Systems and methods for heat balance and transport for aircraft hydraulic systems
US10294967B2 (en) 2013-07-09 2019-05-21 The Boeing Company Systems and methods for heat balance and transport for aircraft hydraulic systems

Also Published As

Publication number Publication date
SE523669C2 (sv) 2004-05-11
JP2005539169A (ja) 2005-12-22
BR0314260A (pt) 2005-07-19
AU2003244290A1 (en) 2004-04-30
ZA200501388B (en) 2006-07-26
CN1682019A (zh) 2005-10-12
KR20050075334A (ko) 2005-07-20
CN100346064C (zh) 2007-10-31
SE0202724L (sv) 2004-03-14
SE0202724D0 (sv) 2002-09-13
EP1552122A1 (fr) 2005-07-13

Similar Documents

Publication Publication Date Title
ZA200501388B (en) Cooling system for a vehicle and vehicle comprising the cooling system
EP1058775B1 (fr) Systeme de refroidissement et de chauffage pour machine
US6945200B2 (en) Cooling system for a vehicle and a vehicle comprising the cooling system
US5056601A (en) Air compressor cooling system
AU2018206712B2 (en) Temperature control system for machine and method of operating same
KR101079796B1 (ko) 유체의 점도를 제어하기 위한 시스템 및 방법 그리고 이시스템을 포함하는 작업차량
US20130153180A1 (en) Cooling System With Dual Reversing Fans
US10436084B2 (en) Utility vehicle fluid cooling
US4069972A (en) Heat systems for vehicles
US4529061A (en) Fluid level control system
DE102019105893A1 (de) Wärmemanagementsystem und -verfahren für ein Fahrzeugantriebssystem
CN1993242A (zh) 冷却方法和装置
EP1657416B1 (fr) Système de rafroidissement pour tracteurs
EP1941165B1 (fr) Systeme de refroidissement pour engin de chantier
US6929087B1 (en) Hydraulic power steering system utilizing fuel as a working fluid
US5501184A (en) Motor vehicle having a common liquid supply for a liquid-cooled drive engine and hydraulic power steering
RU2374116C2 (ru) Система охлаждения гидравлического рулевого усилителя транспортного средства
US5810110A (en) Tandem power steering system with heat sink
JP5037297B2 (ja) 作業車両
JPS6282220A (ja) 車両用冷却システム
NL1028122C1 (nl) Verwarmingssysteem voor een voertuig.
JPH04183979A (ja) 車載用油圧装置
Boelter et al. Packaged Hydraulics for Productivity Improvement-Case History: ASV Inc. All Terrain Vehicle
PL125543B1 (en) Heating system for facilitating diesel engine start at low temperatures

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2003795514

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2005/01388

Country of ref document: ZA

Ref document number: 200501388

Country of ref document: ZA

WWE Wipo information: entry into national phase

Ref document number: 2004535312

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 1020057003820

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 10906943

Country of ref document: US

Ref document number: 2003821752X

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 2003795514

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1020057003820

Country of ref document: KR