[go: up one dir, main page]

WO1999034062A1 - Dispositif electrohydraulique permettant d'actionner une barriere de passage a niveau - Google Patents

Dispositif electrohydraulique permettant d'actionner une barriere de passage a niveau Download PDF

Info

Publication number
WO1999034062A1
WO1999034062A1 PCT/HU1997/000088 HU9700088W WO9934062A1 WO 1999034062 A1 WO1999034062 A1 WO 1999034062A1 HU 9700088 W HU9700088 W HU 9700088W WO 9934062 A1 WO9934062 A1 WO 9934062A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
electrohydraulic
hydraulic
connection
router
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.)
Ceased
Application number
PCT/HU1997/000088
Other languages
English (en)
Inventor
József Horváth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU56754/98A priority Critical patent/AU5675498A/en
Priority to PCT/HU1997/000088 priority patent/WO1999034062A1/fr
Publication of WO1999034062A1 publication Critical patent/WO1999034062A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L29/00—Safety means for rail/road crossing traffic
    • B61L29/08—Operation of gates; Combined operation of gates and signals
    • B61L29/12—Manual operation
    • B61L29/16—Manual operation electrically
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
    • E01F13/04—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions movable to allow or prevent passage
    • E01F13/06—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions movable to allow or prevent passage by swinging into open position about a vertical or horizontal axis parallel to the road direction, i.e. swinging gates
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
    • E01F13/04—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions movable to allow or prevent passage
    • E01F13/08—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions movable to allow or prevent passage by swinging into closed position about a transverse axis situated in the road surface, e.g. tiltable sections of the road surface, tiltable parking posts

Definitions

  • the object of the invention is an electrohydraulic barrier operating device, which is a solution to be primarily used outdoors to operate rail barriers placed at crossings of roads and railways.
  • Patent No. DE 3743347 describes such an electric driven barrier that is supplied with a hydraulic breaker drum.
  • the accidental failure of power supply leads to trouble of operation, uncertain position of the barrier and as a result, it causes danger of accident.
  • a common shortage of all the known barrier-operating devices is that the duration of the opening and closing periods can not be varied, or can be varied only within a small range.
  • My intention was to eliminate the shortages of the known barrier operating devices, that is, to construct a device that operates on a much more reliable way than the solutions described above, which is able to operate on safely for a certain time in case of failure of the power supply required for the operation the device, able to complete the opening or closing cycle that has been started in case of fault of operation. Further, the device is able to close the barrier automatically if necessary in case if the fault takes place in the open position, or to keep the closed position of the barrier in case if the fault takes place in the closed position.
  • the basic idea of the invention is that if we construct an electrohydraulic barrier operating device comprising an electrohydraulic control unit connected to an hydraulic power package that is provided with an hydraulic accumulator, the operation of the device becomes safe.
  • this hydraulic accumulator can be charged continuously by the hydraulic power package preferably through a baroswitch (primarily in the resting - open or closed - position of the railing bar) , so that the energy stored in the accumulator can be driven to the hydraulic appliance even in case of current failure, this hydraulic appliance is in torque transmission connection with the railing bar, so the railing bar can be brought into the required position by the operation of this hydraulic appliance initiated this way.
  • a baroswitch primarily in the resting - open or closed - position of the railing bar
  • this hydraulic appliance is in torque transmission connection with the railing bar, so the railing bar can be brought into the required position by the operation of this hydraulic appliance initiated this way.
  • an electromagnetic valve that opens in case of current failure is to be inserted in the tube connecting the hydraulic accumulator with the hydraulic appliance operating the railing bar.
  • the device being the object of the present invention also comprises a code-sender imaging the actual position of the railing bar.
  • the invention relates to an electrohydraulic barrier operating device comprising an electrohydraulic control unit coupled to a hydraulic power package connected to the drive unit housing moving the closing bar connected to the railing bar having a counterbalance mounted on it.
  • the essence of the invention is that it comprises a code-sender imaging the actual position of the railing bar, the code-sender is connected directly and/or indirectly to the electrohydraulic control unit.
  • a hydraulic transmission unit that is in torque transmission connection with the railing bar is situated in the drive unit housing, the first operating input of the hydraulic transmission unit is connected to the first control output of the electrohydraulic control unit, the second operating input of the hydraulic transmission unit is connected to the second control output of the electrohydraulic control unit.
  • the device comprises a hydraulic accumulator that is connected directly or indirectly to the feed pump of the hydraulic power package through a baroswitch and also connected directly or indirectly to the third operating input of the hydraulic transmission unit through a router valve operated by an electromagnet opening in case of current failure.
  • the hydraulic transmission unit being in torque transmission connection with the railing bar is constructed as a double-operated twin-piston hydraulic rotatory cylinder.
  • the hydraulic accumulator is a steel vessel divided into two parts by an elastic membrane with compressed nitrogen gas in one part of it, the other part is formed so as to act as an oil space.
  • a first back-pressure valve is inserted between the router valve operated by an electromagnet opening in case of current failure and the third operating input of the hydraulic transmission unit, and a third back-pressure valve is inserted between the other part of the hydraulic accumulator and the router valve operated by an electromagnet opening in case of current failure.
  • a fourth back-pressure valve is inserted between the hydraulic power package and the electrohydraulic control unit.
  • the electrohydraulic control unit preferably comprises a second router valve controlled by electromagnets, one connection of the second router valve is connected to the fourth backpressure valve, the other connection of the second router valve is connected to one connection of a third router valve.
  • the third and fourth connections of the second router valve serve as the first and second control outputs of the electrohydraulic control unit.
  • the third router valve is operated by an electromagnet.
  • the third connection of the third router valve is connected to the second connection of the router valve operated by an electromagnet opening in case of current failure, and it is also connected to the oil filter of the hydraulic power package.
  • the third connection of the third router valve is also connected to the fourth connection of the third router valve through a further reduction valve.
  • the second connection of the third router valve is fed back before the further reduction valve and, on the other hand, through the pressure limiting unit, it is connected directly or indirectly to the feed pump of the hydraulic power package and to the other part of the hydraulic accumulator.
  • Fig. 1 is a block diagram of the electrohydraulic barrier operating device
  • Fig. 2 shows the schematic structure of the hydraulic control system.
  • the electrohydraulic barrier operating device of Figure 1 comprises an electrohydraulic control unit 5 coupled to a hydraulic power package 4 connected to the drive unit housing 1 moving the closing bar 3 connected to the railing bar 2 having a counterbalance E mounted on it.
  • the device comprises a code- sender 9 imaging the actual position of the railing bar 2, the code-sender 9 is connected directly and/or indirectly to the electrohydraulic control unit 5.
  • a hydraulic transmission unit 8 that is in torque transmission connection with the railing bar 2 is situated in the drive unit housing 1, the first operating input A of the hydraulic transmission unit 8 is connected to the first control output VA of the electrohydraulic control unit 5, the second operating input B of the hydraulic transmission unit 8 is connected to the second control output VB of the electrohydraulic control unit 5.
  • the invention comprises a hydraulic accumulator 6 that is connected directly or indirectly to the hydraulic power package 4 through a baroswitch 5.6 and also connected directly or indirectly to the third operating input B' of the hydraulic transmission unit 8 directly or indirectly through a router valve 7 operated by an electromagnet opening in case of current failure.
  • the electric control and sent-back system R and the power supply T supplying the device with electricity is also indicated.
  • the electric power supply T can be a separate unit as well, but it can also be connected to the known mains of the station AH.
  • the electric control and sent-back system R receives the usual input commands BU used at railways, and produces and forwards the required output check-back signals KV.
  • FIG. 2 shows the schematic structure of the hydraulic control system.
  • the hydraulic transmission unit 8 is constructed as a double-operated twin- piston hydraulic rotatory cylinder.
  • the hydraulic accumulator 6 is a steel vessel divided into two parts 6.2 and 6.3 by an elastic membrane 6.1. Compressed nitrogen gas can be found in one part 6.2 of it, the other part 6.3 is formed so as to act as an oil space.
  • a first back-pressure valve VI is inserted between the fourth connection of the router valve 7 operated by an electromagnet opening in case of current failure and the third operating input B' of the hydraulic transmission unit 8
  • a second back-pressure valve V2 is inserted between the third connection of the router valve 7 and the first operating input A of the hydraulic transmission unit 8
  • a third backpressure valve V3 is inserted between the other part 6.3 of the hydraulic accumulator 6 and the first connection of the router valve 7 operated by an electromagnet opening in case of current failure.
  • a fourth back-pressure valve V4 is inserted between the hydraulic power package 4 and the electrohydraulic control unit 5.
  • the electrohydraulic control unit 5 shown on Figure 2 comprises a second router valve 5.2 controlled by electromagnets Ml and M2, one connection of the second router valve 5.2 is connected to the fourth back-pressure valve V4, the other connection of the second router valve 5.2 is connected to one connection of a third router valve 5.3.
  • the third and fourth connections of the second router valve 5.2 serve as the first and second control outputs VA and VB of the electrohydraulic control unit 5.
  • the third router valve 5.3 is operated by the electromagnet M3.
  • a reduction valve 5.5 the third connection of the third router valve 5.3 is connected to the second connection of the router valve 7 operated by an electromagnet opening in case of current failure, and it is also connected to the oil filter 4.4 of the hydraulic power package 4.
  • the third connection of the third router valve 5.3 is also connected to the fourth connection of the third router valve 5.3 through a further reduction valve 5.4, the second connection of the third router valve 5.3 is fed back before the further reduction valve 5.4.
  • the third connection of the third router valve 5.3 is connected directly or indirectly to the feed pump 4.2 of the hydraulic power package 4 and to the other part 6.3 of the hydraulic accumulator 6.
  • the feed pump 4.2 driven by an electric motor 4.3 is sinking in the oil tank 4.1 of the hydraulic power package 4.
  • the oil tank 4.1 can be filled up through the oil-filler unit 4.5.
  • the electrohydraulic barrier operating device according to the invention is described in detail in the following. As it is shown on Figure 2, where the hydraulic transmission unit 8 is constructed as a double-operated twin- piston hydraulic rotatory cylinder, this rotatory cylinder is built in the drive unit housing 1 in vertical position.
  • the railing bar 2 with the closing bar 3 connected to it is mounted on the driving axle stub of this rotatory cylinder.
  • the two pistons Dl and D2 of the rotatory cylinder being mounted on one axle are connected by a toothed rack F positioned in the axle line, this toothed rack F is connected to the cogged wheel FK mounted on an axle perpendicular to the toothed rack F.
  • the linear motion of the pistons Dl and D2 results in the rotational movement of the driving axle.
  • the quantity of oil of appropriate pressure as determined by the stroke length (90° turn of axle) and speed of the pistons Dl and D2 required for the linear motion of the pair of pistons Dl and D2 is provided by the hydraulic power package 4 through the electrohydraulic control unit 5.
  • the initial position, that is the open or closed position of the railing bar 2 is generated by an input command BU corresponding to the traffic situation with the help of the internal electric control and sent-back system R. It is also this system R that sends output check-back signals KV relating to the movement and the actual position of the railing bar 2 to the known railway control centre.
  • an input command BU (which is an electric signal) is valid until another command (electric signal) with opposite meaning is received.
  • the input command BU generates an electric connection through the code cylinder situated in the code-sender 9, which results in moving the railing bar 2 into the opposite position and it is kept there until the next command of opposite meaning.
  • the input command BU In agreement with the usual basic railway system the input command BU generating and maintaining the open or closed position of the railing bar 2 holds continuously.
  • the setting of the railing bar 2 from open (vertical) to closed (horizontal) position takes place as the following, while the hydraulic working fluid is let in through the operating input B, and it is conducted away through the operating input A of the rotatory cylinder.
  • the external input command BU energizes the electromagnet Ml of the second router valve 5.2 and the electromagnet M3 of the third router valve 5.3. In this position the first connection and the third connection of the second router valve 5.2 are connected, so the working fluid of the required operating pressure arrives to the operating input B through the control output VB and moves the piston D2 of the ratatory cylinder.
  • connection between the toothed rack F and the cogged wheel FK transmits the torque to the driving axle.
  • working fluid of the same amount as it was let in through the first operating input A is let out through the first and fourth connection of the third router valve 5.3 and through the reduction valve 5.4 and the oil filter 4.4 to the oil tank 4.1.
  • the code sender 9 makes the current of electromagnet M3 stop, so the spring R3 of the third router valve 5.3 switches the returning oil to the reduction valve 5.5 so the oil gets to the oil tank 4.1.
  • the hydraulic resistance of reduction valve 5.5 is preferably much larger than the hydraulic resistance of reduction valve 5.4, so it damps the movement of the railing bar 2 that has been accelerated up to this moment, so the "arriving velocity" of the closing bar 3 is reduced. This velocity can be adjusted by the appropriate calibration of the reduction valves 5.4 and 5.5.
  • the hydraulic system is protected against excess pressure by the pressure limiting unit 5.1.
  • the electromagnet M2 of the second router valve 5.2 is inactive, so spring R2 closes the way between control output VB and the second connection of router valve 5.2, while the first back-pressure valve VI closes the way to router valve 7, so no unauthorised person can move the barrier manually. So in our solution this automatic safety blocking is established by the operating trouble, that is, the current failure. This blocked position can be released only by an authorised operating person preferably with a special tool.
  • the electromagnet M4 of the router valve 7 pulls and restores the normal position.
  • the third and first connections of router valve 7 is open through the second back-pressure valve V2, in this case it is the third back-pressure valve V3 that prevents backflow.
  • the back-pressure valve V4 disconnects the hydraulic power package 4 from the electrohydraulic control unit 5, in this case the operating role of the hydraulic power package 4 is entirely taken over by the hydraulic accumulator 6.
  • the capacity of the hydraulic accumulator 6 is enough to complete the possible cycle to be performed as mentioned above, and also, the device is capable to perform further cycles from resting position corresponding to two-four input commands BU.
  • the capacity of the hydraulic accumulator 6 can be varied if necessary, and the security can be further improved by doubling the hydraulic accumulator 6.
  • the railway control centre (dispatch office) can deliberately stop the current supply of the electrohydraulic barrier operating device initiating this way the above mentioned situation resulting in the blocked closed position of the barrier until the failure is eliminated. In this case only an authorised operating person can operate the barrier manually making temporary crossing possible depending on the actual traffic situation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Unité de commande électrohydraulique (5) couplée à un groupe de puissance hydraulique (4) connecté au châssis (1) de l'unité d'entraînement, ladite unité d'entraînement déplaçant la barre de fermeture (3) reliée à la barrière (2) de passage à niveau, qui porte un contrepoids (E). Un émetteur (9) de signaux d'appel est connecté directement et/ou indirectement à l'unité de commande électrohydraulique (5). Une unité de transmission hydraulique (8), connectée à la barrière (2) de façon à transmettre un couple, est disposée dans le châssis (1) de l'unité d'entraînement. La première entrée (A) de l'unité de transmission hydraulique (8) est connectée à la première sortie (VA) de l'unité de commande (5), tandis que la seconde entrée (B) de l'unité de transmission hydraulique (8) est connectée à la seconde sortie (VB) de ladite unité (5). Le dispositif comporte un accumulateur hydraulique (6), qui est connecté à la pompe d'alimentation (4.2) de l'entrée (B) du groupe de puissance hydraulique (4), directement ou bien indirectement par l'intermédiaire d'un barocontacteur (5, 6). L'accumulateur est également connecté à la troisième entrée (B') de l'unité de transmission hydraulique (8), directement ou bien indirectement par l'intermédiaire d'un clapet répartiteur (7) qui est actionné par l'ouverture d'un électro-aimant en cas de panne de courant.
PCT/HU1997/000088 1997-12-29 1997-12-29 Dispositif electrohydraulique permettant d'actionner une barriere de passage a niveau Ceased WO1999034062A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU56754/98A AU5675498A (en) 1997-12-29 1997-12-29 Electrohydraulic barrier operating device
PCT/HU1997/000088 WO1999034062A1 (fr) 1997-12-29 1997-12-29 Dispositif electrohydraulique permettant d'actionner une barriere de passage a niveau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/HU1997/000088 WO1999034062A1 (fr) 1997-12-29 1997-12-29 Dispositif electrohydraulique permettant d'actionner une barriere de passage a niveau

Publications (1)

Publication Number Publication Date
WO1999034062A1 true WO1999034062A1 (fr) 1999-07-08

Family

ID=10988977

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HU1997/000088 Ceased WO1999034062A1 (fr) 1997-12-29 1997-12-29 Dispositif electrohydraulique permettant d'actionner une barriere de passage a niveau

Country Status (2)

Country Link
AU (1) AU5675498A (fr)
WO (1) WO1999034062A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073119A1 (fr) 1999-06-01 2000-12-07 Horváth, József Commande d'aiguilles
CN101994298A (zh) * 2010-09-30 2011-03-30 深圳市威捷机电技术有限公司 一种具有防撞自动保护装置的道闸杆

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237741A (en) * 1977-05-05 1980-12-09 Huf Franz Joseph Mechanical transmission arrangement
FR2560902A1 (fr) * 1984-03-09 1985-09-13 Petit Edouard Dispositif pour l'immobilisation temporaire de vehicules sur une aire de distribution et de vente de carburant
US4818136A (en) * 1987-04-29 1989-04-04 Nasatka Ralph G Hydraulic vehicle barricade and method
DE3743347A1 (de) * 1987-12-21 1989-06-29 Vdo Schindling Schranke
FR2627200A1 (fr) * 1988-02-11 1989-08-18 Alfa Colombes Barriere pour interdire le passage des vehicules sur une voie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237741A (en) * 1977-05-05 1980-12-09 Huf Franz Joseph Mechanical transmission arrangement
FR2560902A1 (fr) * 1984-03-09 1985-09-13 Petit Edouard Dispositif pour l'immobilisation temporaire de vehicules sur une aire de distribution et de vente de carburant
US4818136A (en) * 1987-04-29 1989-04-04 Nasatka Ralph G Hydraulic vehicle barricade and method
DE3743347A1 (de) * 1987-12-21 1989-06-29 Vdo Schindling Schranke
FR2627200A1 (fr) * 1988-02-11 1989-08-18 Alfa Colombes Barriere pour interdire le passage des vehicules sur une voie

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073119A1 (fr) 1999-06-01 2000-12-07 Horváth, József Commande d'aiguilles
CN101994298A (zh) * 2010-09-30 2011-03-30 深圳市威捷机电技术有限公司 一种具有防撞自动保护装置的道闸杆
CN101994298B (zh) * 2010-09-30 2012-03-14 深圳市威捷机电技术有限公司 一种具有防撞自动保护装置的道闸杆

Also Published As

Publication number Publication date
AU5675498A (en) 1999-07-19

Similar Documents

Publication Publication Date Title
EP0751853B1 (fr) Circuit de commande hydraulique pour engin de battage
EP2626474B1 (fr) Machine de construction hybride avec controle de freins de la superstructure
US6378301B2 (en) Pressurized fluid recovery/reutilization system
US4762473A (en) Pumping unit drive system
US4818136A (en) Hydraulic vehicle barricade and method
EP0900888A4 (fr) Dispositif de commande destine a un engin de construction
EP0982207A3 (fr) Dispositif d'augmentation de la pression dans les cylindres de frein par commande du moteur de la pompe et de diminution de la pression par le contrôle de l' énergie électrique alimentant une valve de commande
US5526885A (en) Hydraulic device for driving piles
CN112689695A (zh) 从作业机具释放的能量的再生系统和方法
US5775647A (en) Hydraulic switch stand
WO1999034062A1 (fr) Dispositif electrohydraulique permettant d'actionner une barriere de passage a niveau
US4780638A (en) Method and system for the production of electrical energy by means of a pressure medium
RU2025440C1 (ru) Устройство для открывания и закрывания дверей
EP1912845B1 (fr) Système de renvoi pour grue
CN113638943A (zh) 一种冲击液压控制系统及凿岩台车
EP0881349A2 (fr) Porte roulante verticale
KR20170093278A (ko) 건설기계의 에너지 회생 시스템
JPH09147696A (ja) ガス遮断器及びそれに用いられる流体圧駆動装置
EP0572362B1 (fr) Dispositif hydraulique pour contrÔler l'actionnement d'une barrière
KR920000340B1 (ko) 펌프수차의 제어장치
CN222795049U (zh) 一种实现矿井提升机以载荷随变制动的系统
SU1267073A1 (ru) Гидравлическа система
US20250101711A1 (en) Electric breaker attachment
CA1255154A (fr) Systeme d'actionnement pour unite de pompage
SU1355180A1 (ru) Устройство управлени и защиты многоопорной дождевальной машины

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH HU IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
NENP Non-entry into the national phase

Ref country code: KR

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA