baber/WOPTO huggingface dataset:
Patent KR-20000045596-A (KR)
Title: Transceiving device of wireless video signals in wwl
Inventor: SEO HO IL
IPC: H04B1/48
Filed: 1998-12-30
Abstract: PURPOSE: A transceiving device of wireless video signals in WWL(Wireless Local Loop) is provided to reproduce video signals through a TV connected to a RIU(radio interface unit) in which video signals from a video server system has been stored if video signal service is requested. CONSTITUTION: A transceiving device of wireless video signals in WWL comprises a RIU(200) , a RP(300; radio port) and a RPC(400; radio port controller). The RIU(200) transfers video service request signals from a TV and a remote controller to the RP and provides video service data from the RP through the TV. The RP(300) transfers the video service request signals from the RIU to the RPC and transfers the video service signals from the RPC to the RIU as public signals. The RPC(400) performs an internet access function and a video server system access function by routing the service request signals from the RP.
Patent KR-20000045962-A (KR)
Title: Working device of a spacer damper of a transmission line
Inventor: YOU JE CHEOL
IPC: H02G7/06
Filed: 1998-12-30
Abstract: PURPOSE: A working device of a spacer damper of a transmission line is provided to easily repair the transmission line and the spacer damper by safely passing the spacer damper. CONSTITUTION: A wording device of a spacer damper of a transmission comprises a fixing plate(2), a body frame(1), a support frame(7), a roller(12), and a braking device(20). A pedal(3) to which a first sprocket(1) is mounted is rotatably attached to the fixing plate(2). The fixing plate(2) is attached to the body frame(1). A rotary shaft(8) to which a third sprocket(c) for transmitting the power of the first sprocket(a) is mounted is installed in the body frame(1). The braking device adheres a transmission wire from the lower side to the upper side.
Patent KR-19990067032-A (KR)
Title: 축방향 피스톤 펌프 또는 모터
IPC: F01B3/00
Filed: 1997-08-26
Abstract: 향상된 축방향 피스톤 에너지 전환 장치는 기부 캠 플레이트 지지 구조체의 기부 지지면에 대기압에 의해 고정된 캠 표면으로서, 두께가 약 0.005 내지 0.040 inch인 얇은 세라믹 마모 플레이트 삽입체를 제공한다.  캠 플레이트 지지면으로의 마모 플레이트의 부착은 캠 플레이트의 지지면과 마모 플레이트의 결합면 모두를 매우 평활한 마무리면으로 연마하며, 마모 플레이트를 지지면에 배치하기 전에 연마된 표면중 하나에 오일과 같은 얇은 유체막을 칠함으로써 달성된다.  엷은 기름막과 함께 이 고도로 연마된 표면은 밀폐 상태의 이음부를 초래한다.  마모 플레이트의 캠 표면에 작용하는 대기압은 고도로 연마된 표면이 결합된 경우 한 쌍의 존슨 블록이 함께 유지되는 바와 동일한 방식으로 지지면의 적소에 마모 플레이트를 꽉 유지하도록 작용한다.
Patent KR-19990076869-A (KR)
Title: 정합된 화상을 갖는 1회용 흡수 물품 및그 제조 방법
IPC: B65H23/00
Filed: 1996-12-11
Abstract: 본 발명에 따르면 두 개의 연속 이동하는 재료층(54, 66)을 제어 가능하게 정합하기 위한 방법이 제공된다.  하나의 재료층(66)은 복수의 분리 개별 구성 요소를 나타내는 복수의 기준 표시(74)를 가지며 다른 연속 이동층(54)은 각각의 복수의 다른 구성 요소를 갖는다.  상기 방법은 소정의 거리로 기준 표시 사이의 거리를 제어하며 연속 이동하는 제2층의 각각의 구성 요소에 각각의 기준 표시를 제어 가능하게 정합한다.  물품의 지정 영역 내에 화상이 제어 가능하게 정합된 물품이 제공된다.
Patent KR-19990077252-A (KR)
Title: 바로 사용할 수 있는 금속선 및 이의 제조방법
IPC: C22C38/00
Filed: 1997-01-08
Abstract: 본 발명은 구조가 대부분 경화되고 어닐링된 마르텐사이트 구조로 이루어진 미세합금 강을 포함하는 바로 사용할 수 있는 금속선에 관한 것이다.  당해 선의 직경은 0.10 내지 0.50mm이고, 선의 최종 인장 강도는 2800MPa 이상이다.  당해 선의 제조방법은, 연신한 원래 선을 성형하고, 성형된 선에 조절된 열처리를 수행하고, 이를 어닐링 온도로 가열하여 대부분 어닐링된 마르텐사이트로 이루어진 구조를 형성함을 포함한다.  이어서 선을 냉각시키고 성형한다.  본 발명은 또한 하나 이상의 이러한 선을 포함하는 어셈블리, 및 특히 타이어 케이싱(casings)을 강화시키는 데 사용되는 선 또는 어셈블리에 관한 것이다.
Patent KR-19990082312-A (KR)
IPC: F02M55/00
Filed: 1997-03-14
Abstract: An injection system for diesel engines with a nozzle holder (1), the pressure channel (2) of which is connected on one side to the injection pump and on the other, comprises a nozzle body (3) secured to the nozzle holder (1) by a tensioning nut (10). To provide a seal, there is an intermediate disc (13) between the nozzle holder (1) and the nozzle body (3). To seal the high-pressure connection in the region of the pressure channels (2, 4) there is a deformable metal seal which bears on a sealing surface and is fitted in a conical seat (19) in the region of the outlet of the pressure channel (2) of the nozzle holder (1).
Patent KR-19990087681-A (KR)
Title: 밀폐 덮개용 로킹 조임쇠
IPC: H05K5/03
Filed: 1997-03-12
Abstract: 밀폐 커버용 로킹 조임쇠는 베이스 및 커버 부품을 포함한다. 상기 베이스는 상기 베이스의 내부 표면상에 배치된 한 쌍의 L형 플랜지 및 상기 베이스의 내부 표면에 형성된 노치를 포함한다. 상기 커버는 상기 커버가 베이스에 조립될 때 상기 베이스의 L형 플랜지를 연동하는 단을 갖는 평판 빔을 포함한다. 또한, 상기 평판 빔은 상기 커버가 상기 베이스에 조립될 때 상기 베이스의 노치를 강제로 연동하는 탭을 포함한다. 상기 로킹 커버 배치는 커버를 구멍상에 영구적으로 고정하기 위하여 경제적이고 효율적인 배치를 제공한다.
Patent KR-19990064411-A (KR)
Title: 시클로헥산디메타놀의 제조방법
IPC: C07C31/27
Filed: 1997-06-25
Abstract: 본 발명은 시클로헥산디카르본산 알킬 에스테르를 고정상 연속반응에 의해, 동 함유 성형촉매의 존재 하에, 반응온도 200∼280℃, 수소압력 185∼300kgf/㎠, 및 수소가스의 공급속도가 공탑선속도로 1∼40㎝/초의 조건 하에서, 수소화하는 것을 포함하는 시클로헥산디메타놀의 제조방법을 제공하고, 원료인 상기 시클로헥산디카르본산 알킬 에스테르는 전형적으로는, 고정상 연속반응에 의해 방향족 디카르본산 디알킬 에스테르를 루테니움지지 성형촉매의 존재 하에 핵수소화하여 제조된다.
Patent KR-20000050404-A (KR)
Inventor: BAEK SEUNG BEOM
IPC: H03M1/74
Filed: 1999-01-08
Abstract: PURPOSE: A digital analog converter is provided to increasing an output range from a ground voltage to a voltage source level by constructing a DAC current source circuit using first and second current source circuits. CONSTITUTION: A bias circuit(100) generates first to fourth bias voltages of the same level. A first current source circuit(260) generates a first output voltage in response to the first and second bias voltage and first and second clock signals. A second current source circuit(270) generates a second output voltage in response to the third and fourth bias voltages and third and fourth clock signals. A decoding logic unit(210) generates the first to fourth clock signals and an output selection signal for selecting an output voltage when digital data to be converted is inputted.
Patent KR-19990072786-A (KR)
Title: 플라즈마어드레스표시장치
IPC: G02F1/133
Filed: 1999-02-19
Abstract: 복수개의 주사 전극이 각 방전 채널 내에 형성되어 있는 것을 특징으로 하는 플라즈마 어드레스 표시 장치로서, 각 방전 채널에 할당된 복수개의 주사 전극에 선택적 펄스를 순차 인가함으로써 방전이 발생하여, 종래 기술의 플라즈마 어드레스 표시 장치에 비해, 주사 전극 수와 격벽 수 각각이 적어도 반으로 감소되므로써 개구율을 증가시킨다.
Patent KR-20000059563-A (KR)
Inventor: JUNG IN CHAE
IPC: H05K3/06
Filed: 1999-03-05
Abstract: PURPOSE: An etching depth control apparatus is provided to coat the etching layer with distinct depth respectively on both sides of a PCB. CONSTITUTION: An etching depth control apparatus comprises a reel(100) supplying the sheet type PCB(110) to an etching chamber(170) which performs the etching process, a number of upper and lower nozzles(140) spraying etchant(150) on both sides of the carried PCB, a number of conductive rollers(130) carrying the PCB sheet, etchant shielding plates(200) cutting off the crossing etchant sprayed from upper and lower nozzles, and a reel(110) winding the processed PCBs. The spray pressures of the upper and lower nozzles are different from each other according desired coating depth. The etchant shielding plates with a number of hole(190) are placed on both sides of the etching chamber.
Patent KR-20000060288-A (KR)
Inventor: AHN SANG PIL
IPC: G06K9/00
Filed: 1999-03-13
Abstract: PURPOSE: A contact luminescence element's fixture is provided to prevent the focus errors of the light image that has been generated by the contact luminescence element by fixing the element to prevent contact pressure movements caused during a finger print contact. CONSTITUTION: A contact luminescence element's fixture is composed of protection, connection, and insertion. The fixture is composed of a clear glass plate(31) that safely protects the contact luminescence element(10). The clear glass plate and the hinge(33) are connected to form an operation surface(32a), which is designed to induce finger print seals. A non-electric conduction plate's(32) hook(32b) is inserted to both sides of the clear glass plate for contact stabilization of the contact luminescence element.
Patent KR-20000061291-A (KR)
Inventor: KIM BYEONG NO
IPC: H05K3/34
Filed: 1999-03-25
Abstract: PURPOSE: A finger correction apparatus and a method thereof are provided to prevent soldering defects in soldering circuit boards by permitting to detect and judge bending degree of fingers to correct the same. CONSTITUTION: A finger(3) is mounted on each of body chains(2) rolling in response to the drive of a rotation motor(1). The finger(3) functions to secure a circuit board(4) from trembling on movement. A flux bath(5) applies flux on the bottom of the circuit board(4) in an overflow or spray manner. A preheater(5) heats the flux applied on the bottom of the circuit board(4) in a suitable temperature to activate the same. A solder bath(7) loads solders on the bottom of the circuit board after passing over the preheater(5) so that automatic soldering can be performed.
Patent KR-19990078407-A (KR)
Title: 무선 호출기의 디렉토리 및 일정 달력의 외부 컴파일 장치
IPC: H04W92/08
Filed: 1999-03-30
Abstract: 본 발명은 무선 호출기의 디렉토리 및 일정 달력(schedule calendar)의 외부 컴파일 장치에 관한 것으로, 무선 호출기의 통신 포트가 확장되거나, 외부 데이터 변환 및 검출 회로에 연결하기 위해 통신 포트를 더 추가하므로, 그 통신 포트는 일반 컴퓨터의 통신 포트와의 연결에 사용되고, 따라서 일정 달력, 디렉토리 등에 관한 개별 데이터를 직접 수신할 수 있어, 사용자는  필요한 이들 메시지를 탐색할 수 있다. 무선 호출기와 컴퓨터의 연결에 따른 종래 기술의 불편함이 개선된다. 따라서 무선 호출기가 그림 문자 캐릭터를 편집하는데 사용할 수 없는 불편함이 개선되므로, 컴퓨터와 무선 호출기 양자의 데이터 베이스가 동일한 편집 데이터를 갖는다.
Patent KR-20000066861-A (KR)
Inventor: KIM YUN GYEONG
IPC: H01L21/26
Filed: 1999-04-21
Abstract: PURPOSE: An apparatus for controlling the temperature of a wafer in a wafer processor is provided to precisely and rapidly control the temperature, by attaching a structure for directly detecting the temperature of the wafer and for directly controlling the temperature of the wafer, on a wafer stage according to the detected temperature value. CONSTITUTION: An apparatus for controlling the temperature of a wafer(2) comprises a temperature detecting sensor(101), a comparator(102) and a temperature control unit. The temperature detecting sensor shapes like a thin film, and directly detects the temperature of the wafer, positioned in an upper part between a wafer stage(3) and a passivation layer(5). The comparator compares a temperature value detected by the temperature detecting sensor with an established reference temperature value, forming a controller for controlling the overall operation. The temperature control unit controls the temperature of the wafer by a Peltier effect controlled by the controller, positioned in a lower part between the wafer stage and the passivation layer.
Patent KR-20000073718-A (KR)
Inventor: KIM GI SANG
IPC: H01L21/68
Filed: 1999-05-13
Abstract: PURPOSE: An electrostatic chuck of a semiconductor manufacturing equipment is provided to simplify a manufacturing process and to increase an operation efficiency of the equipment, by absorbing a target material with different power and performing a dechucking process. CONSTITUTION: An electrostatic chuck(30) of a semiconductor manufacturing equipment comprises a first positive electrode and a second positive electrode. The first positive electrode is surrounded by a first insulating material on a first negative electrode, in which positive and negative terminals of a bipolar power supply are connected to the first positive and the negative electrodes. The second positive electrode surrounded by a second insulating material is formed around the first negative electrode, in which a unipolar power supply of which a side is grounded is connected to the second positive electrode.
Patent KR-20000073879-A (KR)
Inventor: MIN BYUNG WOOK
IPC: C05F3/00
Filed: 1999-05-14
Abstract: PURPOSE: A high speed fermentation drying device is provided, which recycles decomposing organic materials for animal feed and fertilizer and increases working efficiency. CONSTITUTION: The high speed fermentation drying device is characterized in that a drying treatment and a fermenting treatment is sequentially performed in a separated room, (2) and (3), respectively, and optionally a fermentation-drying room(5) is positioned between (2) and (3), and a preheating room(4) is positioned in front of (2) depending on the applicable use. Each room is to be closed and a closed delivering system(6) is installed between (2) and (3), (4) and (2), (2) and (5), and (5) and (3). The condensed water from the decomposition materials is exhausted and waste heat from the condensation is recycled or a heating source of (3) and (4).
Patent KR-20000073944-A (KR)
Inventor: KIM JONG U
IPC: C25C7/00
Filed: 1999-05-17
Abstract: PURPOSE: An electrolytic cell gasket and a producing method thereof are provided to utilize the durability of a teflon gasket and the sealing property of a rubber gasket. CONSTITUTION: An electrolytic cell(10) with a teflon sheet is formed of a rubber gasket body(11) with an aperture(14) for passing a solution and a teflon sheet(12) covered on the inner face exposed to the aperture of the gasket body. The one-side open rectangular type teflon sheet has protrusions on its both terminals to be combined with the gasket body firmly. The teflon sheet in contact with the solution in the electrolytic cell is free from chemical reaction with the solution. The gasket body is not in contact with the solution, thus excellent sealing property is obtained according to the property of rubber.
Patent KR-20000074145-A (KR)
Inventor: YOON DAE DEOK
IPC: F24F1/00
Filed: 1999-05-18
Abstract: PURPOSE: A method for controlling the indoor unit of an air conditioner is provided to operate an indoor air blower by a predetermined value after forcibly operating the air blower in a weak mode for the initial period. CONSTITUTION: A system checks if air conditioner has an error. In case that there is an error, the system displays the error and finishes it. In case that there is no an error, the system decides if the air conditioner is in an initial state. In the initial state, an indoor air blower is forcibly operated in a weak mode and then operated by a predetermined value after a certain time. The air blower cools a room and the system checks the air blower again.
Patent KR-20000074655-A (KR)
Inventor: CHOI SI YOUNG
IPC: H05K1/11
Filed: 1999-05-07
Abstract: PURPOSE: A method for bonding an electrode of a ceramic device to a connection substrate is provided to reduce the bonding time by bonding the electrode to the connection substrate using a high frequency heater CONSTITUTION: A high frequency heater is connected to two electrodes. After aligning two electrodes on an induced coil heater(4), the induced coil heater(4) generates the high frequency power to bond the electrodes. When a thin connection substrate(5) is bonded to a wire(2) or when the thin connection substrate(4) is bonded to another connection substrate(4), a thin metal film is coated on the wire(2) or on an opposite side of the connection substrate. In this state, the high frequency is applied by the high frequency heater so as to bond the thin connection substrate(5) to the wire(2).
Patent KR-20000005716-A (KR)
Inventor: YASUIKASUAKI
IPC: B62D15/02
Filed: 1999-05-26
Abstract: PURPOSE: Equipment for detecting torque is provided to simplify the complexity of previous detecting apparatus caused by needed torsion bar deforming in proportion to applied torque and four coils and by requiring cutting process and much labor. CONSTITUTION: The equipment for detecting torque comprises upper axis, lower axis, element body deforming elastically in proportion to relative displacement of the surface, and magnetic wing that is supported on the element body and have changeable slop of axis for detecting equipment can improve the complexity of structure and for providing compactness of the structure.
Patent KR-20000075154-A (KR)
Inventor: CHOI WON U
IPC: F24C7/08
Filed: 1999-05-29
Abstract: PURPOSE: An inrush current protection timer is provided to reduce manufacturing cost and simplify manufacturing procedures. CONSTITUTION: A timer assembly(100) for controlling a voltage apply state for a microwave oven, comprises a timer motor(5) for supplying a driving force after a preset time period has elapsed, an output control switch(SWVP) which is periodically turned on or off by the driving force from the timer motor so as to apply a power voltage to a high voltage driving unit of the microwave oven, and an inrush current protection timer switch(SW10) which is turned on or off by the driving force from the timer motor so as to supply a power voltage to the high voltage driving unit, a lamp, a fan motor and a driving motor of the micro wave oven. The inrush current protection timer switch has operation terminals(a,b) which are firstly connected to a first terminal(c) of which one end is connected to a positive temperature coefficient thermistor(PTC), and connected to a second terminal(d) after elapse of a predetermined time period.
Patent KR-20000075330-A (KR)
Inventor: KIM YUN HO
IPC: B66C21/00
Filed: 1999-05-31
Abstract: PURPOSE: A built-in type tower crane for a power transmission pylon enables the construction of a power transmission pylon regardless of an area. And the built-in type tower crane for a power transmission pylon is more easy and simple to construct the pylon. CONSTITUTION: A built-in type tower crane for a power transmission pylon comprises a ground platform, a prop(2), a crane main body(3), a supporting rod(4), a first actuating part(5), a first supporting part(6), a second supporting part(7) and a second actuating part. The ground platform is positioned at the center of four-way foundation A, B, C and D(11,12,13,14). A lower limit portion of the prop(2) rotates forward and reward by a supporting shaft(21) on the ground platform. A tower master(31) of the crane main body(3) is inserted inside a supporting frame body. A boom(32) is disposed at the upper portion of the crane main body(3). A lower limit portion of the supporting rod(4) rotates by a hinge shaft(40) on the ground platform. The first actuating part(5) fixes an actuating wire(56) fetched from a winch(51) at the prop(2) through sheave wheels(52,53,54,55). The first supporting part(6) fixes a first supporting wire(62) at the foundation B and C(12,13) through a sheave wheel E(61). The second supporting part(7) fixes a second supporting wire(70) at the foundations(11,12,13,14). The second actuating part(8) fixes the actuating wire(56) at the prop(2).
Patent KR-20000005914-A (KR)
Inventor: HUJISAKIDECHUNOSKE
IPC: H04L12/56
Filed: 1999-06-04
Abstract: PURPOSE: A system is provided to reduce a transfer delay of an internet media and a packet loss. CONSTITUTION: The system comprises: a unit for randomly copying one or more packets in a message; a unit for selecting one or more different paths of one or more destinations through a network; a unit for transmitting each copy to one of the different paths; a unit for determining a position of a received copy from a received message; a unit for arranging the received copy according to positions in the destination memory.
Patent KR-20010003502-A (KR)
Inventor: KIM SANG HUN
IPC: G10L13/00
Filed: 1999-06-23
Abstract: PURPOSE: A method for post-processing division of phoneme is provided so that an error in automatic division of phoneme can be reduced by using a neural circuit network. CONSTITUTION: The method for post-processing division of phoneme has a several training processes. A mean value and a standard deviation of an error of boundary of phoneme are extracted as statistical information from a database(S1) of a manual division of phoneme(S2). A feature parameter for training a neural network is extracted(S3). The neural network is training according to the extracted parameter I,II(S4). Thereafter, after discriminating whether the training continues or not(S5), if the training dose not continue, the neural network is training according to the feature parameters, if the training continues, the weight I,II values of the training parameter of the neural network extracts, stores to a hard disk(S6), and then finishes the training.
Patent KR-20010004990-A (KR)
Inventor: JANG HUI HYEON
IPC: H01L21/8247
Filed: 1999-06-30
Abstract: PURPOSE: A flash EEPROM cell and a method for manufacturing the same are provided to form two different floating gates in one cell by using a hard mask layer in a multi-level cell. CONSTITUTION: A flash EEPROM cell and a method for manufacturing the same comprise the first floating gate(130a), the second floating gate(130b), a control gate(17), a drain junction portion(18a), and a source junction portion(18b). The first and the second floating gates(130a,130b) is separated electrically a semiconductor substrate(11) by a tunnel oxide layer(12). The first and the second floating gates(130a,130b) have different sizes. The control gate(17) is separated electrically from the first and the second floating gates(130a,130b) by a dielectric layer(16). The drain junction portion(18a) is formed on the semiconductor substrate(11) of the first floating gates(18b). The source junction portion(18b) is formed on the semiconductor substrate(11) of the second floating gate(130b).
Patent KR-20000011486-A (KR)
Inventor: RHONDEAU CHRISTINE
IPC: A61K8/49
Filed: 1999-07-05
Abstract: PURPOSE: A keratin fiber coloring compound consisting of positive ionic direct dyeing compound and more than one of viscosity-increasing polymer(which containing more than one of sugar unit) in adequate medium for coloring is provided, which colors human hair keratin strongly and non-selectively. Also provided are coloring methods and equipment. CONSTITUTION: A keratin fiber coloring compound contains more than one of positive ionic direct dyeing compound(chemical formula 1, 2, 3, or 3a) and more than one of viscosity-increasing polymer(which containing more than one of sugar unit). Positive ionic direct dyeing compound is desirably 0.001-10wt%(more desirably 0.005-5wt%) and viscosity-increasing polymer is desirably 0.01-10wt%, especially 0.1-5wt% to total weight of coloring compound.
Patent KR-20000011740-A (KR)
Inventor: INOUE YASUSHI
IPC: H01L23/12
Filed: 1999-07-15
Abstract: PURPOSE: A wafer scale package structure is provided to be a high productivity and cheap, and a circuit substrate is provided to use therein. CONSTITUTION: The wafer scale package structure contains; a wafer(7) having an electrode pad(8); a circuit substrate(6) laminated on the wafer for relining the electrode pad of the wafer, and produced by an insulation layer produced by an insulating resin as a main component; a bonding agent(4) to laminate the circuit substrate on the wafer; a conductive matter to contact the electrode pad of the wafer and the circuit substrate; the wafer and the circuit substrate to be able to divide each in a chip sized-package at the same time; the heat expandability of a metal foil being under 10ppm/°C; a iron-nickel alloy.
Patent KR-20010010363-A (KR)
Inventor: LEE BYUNG KUG
IPC: B60T8/48
Filed: 1999-07-13
Abstract: PURPOSE: An eccentric wheel braking system minimizes the radius of turning of a vehicle. CONSTITUTION: A driver connects an output of one side of a capacitor to an AND-gate and that of the other side to a brake light contact and a sensor contact to be inputted into a 6th OR-gate. Then, the output is connected to the AND-gate via an inverter. Further, an output of one side of fixed contacts is inputted into an actuator via 5th OR-gate by connecting the AND-gate with the fixed contacts, and an output of the other side to be inputted into flow path intercepting devices via another OR-gates connected to the fixed contacts. An output from the 5th OR-gate joints a moving electromagnet with a fixed electromagnet, thereby compressing an electromagnet axis. The axis pushes a push rod connecting shaft to a concave inserting hole, thereby making an oil pressure by compressing a servomechanism. The oil pressure passes the flow path intercepting device. An output from the another OR-gates joints a fixed electromagnet and a moving electromagnet such that the front end of a force supporting rod connected to an electromagnet axis is closely contacted to a valve seat, thereby intercepting the flow path. Therefore, an eccentric wheel braking is occurred because the oil pressure is transmitted only to open flow paths.