baber/WOPTO huggingface dataset:
Patent KR-20090022281-A (KR)
Title: Method for leaving igmp group in multicast network and host device implementing the same
Inventor: PARK SUNG KWON
IPC: H04L12/26
Filed: 2007-08-30
Abstract: A method for withdrawing from a group in a multicast transmission environment and a host device for supporting the method are provided to enable a router to automatically withdraw from an IGMP group in case contents is not used by making a set-top box monitor whether multicast data is actually used in real time. When a driving voltage is fed back from a display unit, a set-top box determines the driving voltage value of the display unit by using a digital voltage meter(S500). The set-top box periodically measures the driving voltage value of the display unit to compare the measured value with a reference voltage value stored in a memory(S510). If the measured driving voltage becomes lower than the reference voltage(S520), the set-top box determines that the display unit is changed into a stand-by on mode due to the termination of the display unit(S530). If the measured driving voltage becomes higher than the reference voltage(S520), the set-top box determines that the display unit is changed into a stand-by off mode due to the activation of the display unit(S540).
Patent KR-20090025619-A (KR)
Title: Device for compensating zero crossing to prevent fusion of relay contact
Inventor: CHUNG JE YUN
IPC: H01H50/00
Filed: 2007-09-06
Abstract: A device for compensating zero-crossing is provided to perform the zero-crossing control according to a relay by compensating the zero-crossing of relay. An AC voltage measurement part(61) measures both ends voltage of the relay switch in a constant cycle. The AC voltage measurement part performs the operation of deciding the time for starting the control. A time delay part(62) performs the operation of delaying the time from the actuating time of relay to the contact point time of the relay switch. A relay control part(63) performs the operation of running the relay. A relay contact voltage measurement part(64) measures the load voltage connected to the relay switch. A contact point delay time detection unit(65) determines the time from the output time point of the relay driving signal to the load voltage of 0V. A delay time correction(66) performs the operation of amending the time delay.
Patent KR-20090025741-A (KR)
Title: Apparatus for treating sludge
Inventor: NA YU SANG
IPC: C02F11/00
Filed: 2007-09-07
Abstract: An apparatus for treating sludge is provided to prevent a safety accident and leakage of toxic gas using rollers having an abrasion resistance property and a durability improved driving chain. An apparatus for treating sludge comprises the following units. A plurality of scrapers pushes sludge located inside a tank to a processing unit. A driving unit(20) installed on both sides of the scraper connects plural scrapers. A cover unit is positioned in an upper part of the tank to confirm the scrapers. The driving unit has rollers having an abrasion resistance property which are inserted into each connection pin(24). The connection pin combines two line members(22) which is formed at some distance from each other.
Patent KR-20090029483-A (KR)
Title: Solar cell module for construction material
Inventor: KANG SEUNG MOON
IPC: H02S40/00
Filed: 2007-09-18
Abstract: An insulating glass type solar cell module is provided to sustain the product quality by simplifying the manufacturing process. An insulating glass type solar cell module comprises a solar cell module(105), a glass plate(107), a spacer(109), and a thiokol(111). The glass plate is arranged in order to face the solar cell module. The spacer is positioned between the glass plate and the solar cell module. The spacer comprises an insulation layer(117) with the glass plate and the solar cell module. The spacer is formed of the thermoplastic resin composite. The thermoplastic resin composite has the thermoplastic resin, the unvulcanized rubber and an absorber. The thiokol is positioned between the glass plate and the solar cell module to surround the spacer.
Patent KR-20090031034-A (KR)
Title: 듀얼 폴리 게이트 형성 방법
Inventor: KIM YOUNG HOON
IPC: H01L21/336
Filed: 2007-09-21
Abstract: 본 발명에 따른 듀얼 폴리 게이트 형성 방법은, PMOS 및 NMOS 영역을 갖는 반도체 기판 상에 게이트절연막을 형성하는 단계; 상기 게이트절연막 상에 폴리실리콘막을 형성하는 단계; 상기 폴리실리콘막 상에 질화막을 형성하는 단계; 상기 질화막 상에 상기 NMOS 영역을 가리는 마스크패턴을 형성하는 단계; 상기 노출된 PMOS 영역의 폴리실리콘막 내에 P형 불순물을 이온주입 하는 단계; 상기 마스크패턴을 제거하는 단계; 상기 마스크 패턴이 제거된 반도체 기판을 열처리하여 PMOS 영역의 폴리실리콘막 내에 이온 주입된 P형 불순물을 활성화시키는 단계; 및 상기 질화막을 제거하는 단계를 포함한다.
Patent KR-20090032751-A (KR)
Title: Sox-absorbent for flue gas desulfurization system
Inventor: KIM MIN TAE
IPC: F23J1/02
Filed: 2007-09-28
Abstract: A desulfurization agent for a wet flue-gas desulfurization system is provided to improve the heat exchange efficiency of facilities and prevent damage to a thermal device in high pressure washing by easily washing scales generated in an enamel coating layer with water of high temperature and high pressure. A desulfurization agent for a wet flue-gas desulfurization system easily removes scales on a thermal device surface of a gas-gas heater. A different desulfurization agent with limestone is mixed with the limestone used as the desulfurization agent of the flue-gas desulfurization system to react with SOx in an absorptive tower of the flue-gas desulfurization system. A portion of a solid content including the generated gypsum is not removed and is transferred to the gas-gas heater. The scales piled on the thermal device surface of the gas-gas heater is easily washed with the hot water.
Patent KR-20090035845-A (KR)
Title: Heat pipe type dissipating device
Inventor: I SANG CHEOL
IPC: F28D15/02
Filed: 2007-10-08
Abstract: A heat pipe type radiator is provided to obtain radiating area without restriction of distance between a heat absorbing unit and a heat radiating unit and reduce noise and obtain high structural stability at thin thickness. A heat pipe type radiator comprises a plurality of unit heat pipe loops(20) radially arranged around a heat source. The unit heat pipe loop comprises: a heat absorbing pipe part(21) arranged near a heat source; and a heat emitting pipe part(23) being connected to the heat absorbing pipe part and emitting the heat transferred from the heat absorbing pipe part. The working fluid is injected in the heat absorbing pipe part and the heat emitting pipe part. A part of the unit heat pipe loop is connected to the adjacent unit heat pipe loop.
Patent KR-20090035977-A (KR)
Title: Method of manufacturing liquid crystal display device
Inventor: KANG YOUNG KWON
IPC: G02F1/1343
Filed: 2007-10-08
Abstract: A method of manufacturing a liquid crystal display device is provided to have a pixel electrode and a common electrode having a fine line width, thereby improving an aperture ratio and a contrast ratio of the liquid crystal display device. A conductive film(130a) is formed on a substrate(100). A mask layer is formed on the conductive film. The mask layer has an etching selection ratio different from the conductive film. A photoresist pattern(150b) having a fixed pattern is formed on the mask layer. A mask pattern(140b) having an undercut shape about the photoresist pattern is formed by dry-etching the mask layer. The photoresist pattern is removed. At least one of the pixel electrode or the common electrode is formed by wet-etching the conductive film by the etching mask.
Patent KR-20080034084-A (KR)
Title: A private network system and method
Inventor: DEVONSHIRE KARYN
IPC: H04L12/22
Filed: 2007-10-15
Abstract: A private network system and a method for implementing the same are provided to share data stored in an individual device on the Internet by using a special security partition using selective ciphering. A cloud(H) separately exists and includes a secret search point(105). Entities of clouds(E,F,G) use a shared search point(104) An entity of the cloud uses the secret search point. If an arbitrary device is combined with the cloud, it should recognize the secret search point and should be registered to the secret search point. If all the entities within a cloud(114) share the search point, it is believed that the cloud is centrally managed. Four entities, which may be clouds or devices formed together with the centrally managed cloud, exist. Every kind of traffic among entities is selectively coded. At least every entity should be authenticated. If coding is used, the coding is unique to the cloud and the entities.
Patent KR-20090003101-A (KR)
Title: Automatic teller device
Inventor: KAWASE HIROYUKI
IPC: G06Q40/00
Filed: 2007-10-17
Abstract: An automated transaction apparatus is provided to confirm a client using bio information without using an IC(Integrated Circuit) card and compare bio information to eliminate a burden of confirming the bio information according to an upper device. An automated transaction apparatus(1) includes a bio information acquisition unit(6) for acquiring bio information of a client, a card reader for reading information of a transaction card of the client, and an input unit through which the client inputs a password or transaction information. The password or the transaction information is transmitted to an upper device. The upper device identifies the client through the password.
Patent KR-20090042626-A (KR)
Title: Baffle, substrate supporting apparatus and plasma processing apparatus having the same
Inventor: JANG CHUL HEE
IPC: H01L21/02
Filed: 2007-10-26
Abstract: A plasma processing device for enhancing an etching uniformity of a substrate is provided to improve an exhaust flow of a gas by changing a shape of a slit formed in a baffle. A plasma processing device comprises a chamber(100), a shielding member(200), and a supporting device(300). The chamber has a predetermined space in order to process a substrate(S). The shielding member is formed on a top inside the chamber, and prevents generation of plasma in a top surface and a side surface of the substrate. A groove(210) is formed on a bottom surface of the shielding member, and surrounds the top surface and the side surface of the substrate. The supporting device is faced with the shielding member, supports the substrate, and includes an electrode(310), a substrate supporting part(320), and a baffle(400).
Patent KR-20090047191-A (KR)
Inventor: CHOI KWON SICK
IPC: F02B37/22
Filed: 2007-11-07
Abstract: 본 발명은 액츄에이터를 구동하는 데에 필요한 스프링상수를 다양하게 제공할 수 있어서, 차량의 저속 저부하의 비교적 안정되고 일정한 운전조건뿐만 아니라, 차량의 발진 및 가속조건과 같은 고속 고부하 상태에서도 적절한 액츄에이터의 응답성을 확보할 수 있도록 함으로써, VGT가 탑재된 차량의 운전특성을 차량의 전 운전범위에서 크게 향상시킬 수 있도록 한다. 
       
     진공실, 키홈, 나사홈, 과급압력, VGT
Patent KR-20080042030-A (KR)
Title: Producing apparatus of silver ion water mixing low and high voltage and its producing method therefor
Inventor: HWANG MYUNG WHAN
IPC: C02F1/461
Filed: 2007-11-08
Abstract: An apparatus and a method for the production of silver ion water are provided to solve a problem that an increase in current makes it difficult to mass-produce silver ion water and prevent deterioration in quality of silver ion water by adopting a method using low voltage together with high voltage. An apparatus for the production of silver ion water using low voltage together with high voltage comprises: a pair of right silver plate(10) and left silver plate(10') to which electrodes(11) are connected; an electrolyzer(20) which contains the right and left silver plates and water, and which contains silver ion water generated by electrolysis of the right and left silver plates; and a power supply part(30) for sequentially applying a low voltage and a high voltage to the right silver plate and the left silver plate through the electrodes. The apparatus further comprises: a pump part(40) for pumping water from a water tank(90) containing raw water to inject water into the electrolyzer through a water supply pipe(60); a storage tank(100) for collecting silver ion water contained in the electrolyzer through a discharge pipe(70); and a filter part(50) for removing impurities of water injected into the electrolyzer. Further, an outputting voltage of a low voltage of the power supply part is 60 to 100V, and an outputting current of the low voltage is 10 to 50 mA.
Patent KR-20090048001-A (KR)
Inventor: UHM HYUN DUK
IPC: G11B7/0055
Filed: 2007-11-09
Abstract: 본 발명은 소자(消磁)장치인 저장매체의 데이터 소거장치에 관한 것으로, 더욱 상세하게는 자기 테이프, HDD 등의 저장 데이터를 소거하기 위해 28mm 전후의 좁은 공간사이로 강력한 자력의 영구자석을 상하측에 배치하여, HDD등의 저장매체를 통과시켜 영구자석의 강한 자기력으로 HDD 등의 저장매체에 기록되어 있는 정보를 지우게 된다. 데이터를 소거하기 위해 HDD 등의 저장매체를 영구자석의 자기력선의 가로방향 및 세로방향으로 각기 90도씩 위치를 변경하여 통과할 수 있도록 하면 완벽하게 지울 수 있다. 
     이를 위한 장치로 HDD등의 저장 매체를 고정하여 놓는 판을 28mm 전후의 좁은 공간에 배치된 영구자석군 사이로 통과하기 위해 이동 베이스 위에 낮은 높이의 원형기어 회전판을 구성하고, 원형기어 회전판 안에 저장매체를 놓을 수 있는 공간을 두며, 원형기어 회전판을 회전시키기 위한 동력원인 롤러부가 이동베이스 상에 4개로 구성되어 사각 위치 점에서 이동 베이스와 고정시키는 구조로 하여 원형기어 회전판을 롤러부의 롤러와 연결되게 하여 회전동력을 전달시켜 원형기어 회전판을 회전시켜 저장매체를 지우고자 하는 방향에 맞게 원형기어 회전판을 90도 또는 임의 각도로 설정하여 회전시킬 수 있고 데이터가 소거된 HDD 등의 저장매체는 원 위치로 복귀한 후에 자동으로 배출할 수 있는 구조를 구비한 저장매체의 데이터 소거장치를 제공하는 데 있다. 
       
     자기 테이프, HDD, 소거장치, 디가우저, 파괴장치, 기록매체, 저장매체
Patent KR-20090048947-A (KR)
Inventor: CHO SEI HOON
IPC: H01R9/05
Filed: 2007-11-12
Abstract: 본 발명은 판형 접속단자와 하우징의 결합을 안정적으로 유지할 수 있는 구조의 케이블 커넥터에 관한 것이다. 
     본 발명에 따르면, 내부에 판형단자가 삽입될 수 있도록 공간이 마련되며 상기 공간의 내주면에 삽입 장착된 단자의 후퇴를 방지하는 안착홈이 구비된 커넥터 하우징; 및 판상형 탭 형태로 이루어지며, 후단에 케이블이 조립되는 케이블 조립부와, 전단에는 다른 단자와 접점을 이루는 접점부와, 상기 커넥터 하우징에 삽입 장착시 상기 안착홈에 계지 되도록 일 측면이 돌출된 돌기부를 구비하는 판형단자;를 포함하는 케이블 커넥터가 개시된다. 
       
     커넥터, 판형단자, 케이블
Patent KR-20090050628-A (KR)
Inventor: LEE DONG HYUN
IPC: H04L12/28
Filed: 2007-11-16
Abstract: 본 발명은, 복수의 호스트들과, 상기 복수의 호스트들에 게이트웨이(gateway)를 지원하는 이동국과, 상기 이동국과 연결된 무선 접속국(RAS: Radio Access Station)을 통해 상기 이동국을 제어하는 접속 제어 라우터(ACR: Access Control Router)와, 상기 접속 제어 라우터로 데이터를 송신하는 홈 에이젼트(HA: Home Agent)를 포함하는 통신 시스템에서 상기 이동국이 상기 호스트들과 동적 호스트 구성 프로토콜(DHCP: Dynamic Host Configuration Protocol)을 각각 처리하고, 상기 호스트들과의 동적 호스트 구성 프로토콜 처리 횟수와 동일한 횟수로 상기 접속 제어 라우터가 상기 이동국과 상기 동적 호스트 구성 프로토콜을 반복적으로 처리하고, 상기 호스트들과의 동적 호스트 구성 프로토콜 처리 횟수와 동일한 횟수로 상기 홈 에이젼트가 상기 접속 제어 라우터와 프록시 이동 인터넷 프로토콜(PMIP: Proxy Mobile Internet Protocol)을 반복적으로 처리하며, 상기 호스트들이 상기 이동국으로 각각 접속된다.
Patent KR-20090051793-A (KR)
Title: 금속산화물이 함유된 복합나노섬유 제조방법
Inventor: KIM SOON HYUN
IPC: D01F9/12
Filed: 2007-11-20
Abstract: 본 발명은 금속산화물이 함유 된 복합나노섬유 제조방법에 관한 것으로서, 탄소섬유전구체 재료, 금속산화물 및 용매를 혼합하여 방사용액을 제조하는 단계, 상기 제조한 방사용액을 전기 방사하여 상기 금속산화물이 포함된 복합나노섬유를 얻는 단계, 상기 복합나노섬유를 공기 중에서 가열시켜 안정화 시키는 산화안정화 단계, 상기 산화안정화 된 복합나노섬유를 불활성 분위기 내에서 가열하는 탄화 단계 및 상기 탄화 된 복합나노섬유를 다시 산화시키기 위해 가열하는 후 산화 단계를 포함함으로써, 휘발성 유기화합물인 아세트알데히드를 효과적으로 광분해 시킬 수 있는 기술적 장점이 있다. 
       
     탄소나노섬유, 금속산화물, 산화, 광활성
Patent KR-20090053584-A (KR)
Inventor: KIM YOUNG JAE
IPC: H05K3/46
Filed: 2007-11-23
Abstract: 본 발명은 복수 개의 절연층과 복수 개의 도체층을 서로 적층하여 형성된 다층 인쇄 회로 기판에 있어서, 상기 복수의 절연층 중 선정된 절연층 위에 스트립 형상으로 패턴 형성되어 도통홀을 통해 입출력 단자와 연결된 저항, 상기 복수 개의 도체층 중에서 선정된 도체층에 스파이럴 형상으로 코일 패턴이 형성되고 상기 코일의 입출력 단자는 도통홀을 통해 연결되도록 형성된 인덕터, 및 상기 복수 개의 도체층 중 선정된 두 도체층에 각각 상부 전극과 하부 전극을 패턴 형성하여 그 사이에 층간 절연체가 형성되도록 하고, 상기 상부 전극과 하부 전극은 도통홀을 통해 입출력 단자와 연결되도록 형성된 캐패시터를 조합하여 구현한 수동 소자 회로를 내장한 다층 인쇄 회로 기판을 제공한다.  
       
     내장형 인덕터, 내장형 캐패시터, 내장형 공진기, 유전체 기판, 시스템 온 패키지, SOP, 다층 인쇄 회로 기판.
Patent KR-20090055082-A (KR)
Title: Heat pipe unit and heating system for korean hypocaust using thereof
Inventor: KWON TAE YUN
IPC: F24D3/10
Filed: 2007-11-28
Abstract: A heat pipe unit and a heating apparatus for ondol using the same are provided to improve productivity greatly and save production costs since an electric heat pipe, a perpendicular heat radiation pipe and a horizontal heat radiation pipe are integrated with the heating source pipe. A heat pipe unit and a heating apparatus for ondol using the same comprise a heat source pipe(10) which is made of synthetic resin and wherein the heating source steam vapor or warm water flows, an electric heat pipe(21) which is formed in the outer circumference of the heating source pipe, and wherein a nozzle(22) is formed, whereof both end are closed, a plurality of perpendicular heat radiation pipes(23) which is integrated and connected with the electric heat pipe, a horizontal heat radiation pipe(24) of which both ends are closed and which is connected to a plurality of perpendicular heat radiation pipes, and a thermal medium path which is injected into the electric heat pipe through the nozzle and is vacuum sealed.
Patent KR-20090055403-A (KR)
Title: Contrast improvement apparatus and method
Inventor: KIM SU HYUNG
IPC: H04N5/57
Filed: 2007-11-28
Abstract: A contrast improving apparatus and a method thereof are provided to minimize gradation agglomeration by setting inclination of a corresponding gray curve so as to be closer to 1 in a gradation area where plural image pixels are distributed. A contrast improving apparatus comprises an average brightness level input unit(31), a contrast curve generating unit(32), and a mapping part(33). The average brightness level input unit is inputted with an average brightness level value of a previous frame. The contrast curve generating unit produces low, middle, and high gray curves based on the average brightness level value of the previous frame and a set value of a user. In a gray area where plural image pixels are distributed, inclination of a corresponding gray curve is set to be closer to 1. Inclination of a gray curve of a corresponding gray area is set to be closer to zero. The mapping part outputs a brightness signal with an improved contrast by mapping the brightness signal to the contrast curve.
Patent KR-20090058971-A (KR)
Title: Driving apparatus for plasma display panel
Inventor: YOUN HEE JUNG
IPC: H03K4/64
Filed: 2007-12-05
Abstract: A driving apparatus for a plasma display panel is provided to increase the reliability of the display by preventing thermal and electrical deterioration of a switching device through a diode. A sustain voltage feed port(430) supplies a sustain voltage to an electrode of a plasma display panel. A base voltage supply unit(440) supplies a base voltage to an electrode, and an energy recovery unit(420) stores electrical energy in the energy storage(400). An energy source(410) supplies the energy stored in the energy storage to the electrode, and an inductor(450) is arranged at the energy storage, the energy recovery unit and between the electrodes. A diode(480) is arranged between the inductor unit, the energy recovery unit, and the sustain voltage source generating the sustain voltage.
Patent KR-20090061487-A (KR)
Title: Washing machine
Inventor: HA DONG SOO
IPC: D06F37/26
Filed: 2007-12-11
Abstract: A laundry treatment apparatus is provided to prevent the damage of switch despite of adding action force by comprising a solid switch. The laundry treatment apparatus(100) comprises a case, inner switch part, body part, and contact part. The inner switch part operates a switch by being placed inside of the case. The body part is supported by the case. The contact part is extended from the body part, and adds the action force to the inner switch part and applies the signal to the switch. The body part and contact part is formed in a body.
Patent KR-20090062197-A (KR)
Title: Clamp for leaf spring
Inventor: LA MIN HWAN
IPC: B62D24/04
Filed: 2007-12-12
Abstract: A clamp for a leaf spring is provided to guide 'U'-shaped bolts and to minimize the deformation of a clamp caused by the load delivered through the leaf spring by employing a reinforcing plate with a guide unit. A clamp for a leaf spring comprises the following units. A reinforcing plate(110) is installed on the outer surface of the clamp in a longitudinal direction. A guide unit(112) reinforces the rigidity of the clamp and allows a 'U'-shaped bolt to be inserted. The guide unit is located on both ends of the reinforcing plate and protruded outward. In the reinforcing plate, a welding hole(114) is positioned between guide units. The reinforcing plate is welded on the outer circumference of the clamp through the welding hole.
Patent KR-20090063388-A (KR)
Title: A rocksalt
Inventor: YU DONG SU
IPC: F21V33/00
Filed: 2007-12-14
Abstract: A rocksalt decoration device is provided to obtain an antifungal effect and a deodorization effect by emitting negative ions through a piece of rocksalt stored in a case. A plurality of insertion holes are formed at a case(10,20) for storing pieces of rocksalt having a constant size. A halogen lamp and a light emitting diode are installed in the insertion holes. The halogen lamp and the light emitting diode are installed on a printed circuit board. The halogen lamp and the light emitting diode are turned on by a controller. A heating unit is inserted into the insertion hole of the case in order to express various kinds of interior atmosphere. An extrusive piece is formed at a rim of a lower part of the case into which a supporting plate is inserted. A combination projection and a combination groove are formed at one side of the extrusive piece. A combination piece is downwardly formed at a rim of an upper part of the case. A combination projection and a combination groove are formed at the combination piece. The extrusive piece and the combination piece are coupled with each other in order to receive the pieces of rocksalt.
Patent KR-20090063613-A (KR)
Title: Magnetic thin film structure, magnetic recording media and method of manufacturing the magnetic recording media
Inventor: LEE MYUNG BOK
IPC: G11B5/68
Filed: 2007-12-14
Abstract: A magnetic thin film structure, a magnetic recording medium and a method of manufacturing the magnetic recording medium are provided to obtain a structure in which a magnetic layer having high magnetic anisotropy is formed on an v underlying layer by using transition metal nitride as the underlying layer. A magnetic thin film structure comprises: a substrate(10); an underlying layer(16) formed on the substrate of transition metal nitride; a plurality of dots(22) consisting of magnetic materials having the magnetic anisotropy on the underlying layer; and a magnetic recording layer(24) having a non-magnetic area made of the different heterogeneous materials with the magnetic materials isolating the dots. The magnetic materials forming the dots have an L1o structure.
Patent KR-20090064045-A (KR)
Title: Vehicle equipped with one way clutch
Inventor: CHO HANG CHEOL
IPC: F16D41/061
Filed: 2007-12-14
Abstract: A vehicle equipped with a one-way clutch is provided to control a vehicle in different manners when the vehicle is pushed backward and when the vehicle is not pushed backward on a sloped way. A vehicle equipped with a one-way clutch includes an inner race shaft(200), an outer race(210), a sprag, a fork(215), and a gear(230). The inner race shaft has a sloped face formed on one side of the outer face thereof. The inner race shaft penetrates the outer race. The inner face of the outer race is located apart from the sloped face. The sprag is interposed between the sloped face and the inner face of the outer race. The fork moves the outer race. The gear is connected with the outer race.
Patent KR-20090064646-A (KR)
Title: Rattle noise preventing type motor driven powersteering system in vehicle
Inventor: CHO SUNG SHIK
IPC: B62D5/04
Filed: 2007-12-17
Abstract: A rattle noise preventing type motor driven power steering system in a vehicle is provided to make a worm wheel freely slide in the axial direction for stable engagement with a worm shaft, thereby preventing the generation of rattle noise. A rattle noise preventing type motor driven power steering system in a vehicle includes stoppers(50) mounted at upper and lower parts of a worm shaft(20), which is coupled with a worm wheel(30), by a predetermined distance, and springs(60) mounted between the worm wheel and the stoppers, so that the worm wheel engaged with the worm shaft stably for absorbing shock transmitted to the worm wheel.