baber/WOPTO huggingface dataset:
Patent KR-20020047537-A (KR)
Title: Controlling device of Vacuum refrigerator
Inventor: HWANG IN YEONG
IPC: F25D29/00
Filed: 2000-12-13
Abstract: PURPOSE: A device for controlling vacuum refrigerator is provided to prevent oxidation of stored food by oxygen in the air by discharging air in a food storage compartment to keep the food storage compartment vacuous. CONSTITUTION: A refrigerator includes a vacuum chamber(30) placed in a cold air passage(1) and having a space part storing food therein; a vacuum pump(40) discharging air in the vacuum chamber outward; and a control part control the vacuum pump to interlock with a compressor(2) turned on/off by temperature of a refrigerating compartment(10) or a freezing compartment of a freezing cycle. The control part comprises a microcomputer driving the vacuum pump when the compressor is operated and stopping the vacuum pump when the compressor is stopped.
Patent KR-20020047734-A (KR)
Title: Fabrication method of hot rolling sheet with high elongation
Inventor: KIM GEUN HWAN
IPC: B21B9/00
Filed: 2000-12-14
Abstract: PURPOSE: A method for manufacturing hot rolled steel with a high elongation is provided which maximizes elongation by controlling cooling patterns of the hot finishing rolled ultra-low carbon steel after hot finishing rolling ultra-low carbon steel in which a trace of carbon is contained in the hot rolled steel. CONSTITUTION: In a method for manufacturing hot rolled steel for improving elongation in the cooling process of ultra-low carbon steel maintaining 30 to 35 Kg/mm¬2 of tensile strength and containing 0.001 to 0.005 wt.% of C, 0.5 to 0.7 wt.% of Mn, 0.01 to 0.02 wt.% of P, 0.001 to 0.01 wt.% of S and 0.010 to 0.055 wt.% of Ti, the method for manufacturing hot rolled steel with a high elongation comprises a structure micronization step of transforming austenitic phase into ferritic phase having a fine particle size by rapidly cooling the hot finishing rolled ultra-low carbon steel to the temperature range of Ar1+20 to Ar1+30 deg.C in a cooling rate of -50±10 deg.C after hot finishing rolling ultra-low carbon steel; a carbon deposition step of depositing carbon contained in the ferritic phase into a grain boundary by slowly cooling the ultra-low carbon steel formed in the ferritic phase in the structure micronization step to the temperature range of Ar1 to Ar1+25 deg.C for 5±3 seconds in a cooling rate of 5±3 deg.C/sec; and a coiling step of coiling the rapidly cooled ultra-low carbon steel using a coiler after rapidly cooling the ultra-low carbon steel passing through the carbon deposition step to the temperature range of 650±50 deg.C in a cooling rate of -50±10 deg.C/sec.
Patent KR-20020047739-A (KR)
Title: Tread Profile Measurement Methode of Tire
Inventor: OH SEONG HWAN
IPC: G01M17/02
Filed: 2000-12-14
Abstract: PURPOSE: A method for measuring profile of tire thread is provided to accurately measure profile and transformation amount of tire thread during high speed rotation of the tire, while simplifying measurement configuration. CONSTITUTION: A method comprises a first step of arranging a background plate between a tire and a drum for rotating the tire at a high speed, and high speed photographing the rotating tire thread by using a CCD camera; a second step of digitalizing, through the use of an image grabber, the image photographed by the CCD camera; and a third step of applying the digital signal to a computer device, and allowing the computer device to analyze and measure the profile and transformation amount of tire thread. In the first step, the CCD camera photographs the image reflected at the background plate installed in rear of the tire rotating by the drum, and the image reflected in front of the tire.
Patent KR-20020052133-A (KR)
Title: Nondestructive Method for Measurement of the Effective Grain size in Lath Martensitic Steel
Inventor: HONG SUN TAEK
IPC: G01H9/00
Filed: 2000-12-23
Abstract: PURPOSE: A non-destructive method to measure the effective crystal grain size in a rapid and economic manner without damaging the steel plate by measuring ultrasonic attenuation coefficient. CONSTITUTION: A non-destructive method comprises the steps of measuring the attenuation coefficient of lath martensitic steel through an ultrasonic method; and calculating the effective crystal grain size in accordance with the formula Dav = 1.79 + 22.97a¬b, wherein Dav is the size of packet which is an average effective crystal grain of martensitic steel and expressed in micron meter, a is an ultrasonic attenuation coefficient expressed in nepers/cm, and b is a constant value ranging 2.02 to 2.04.
Patent KR-20020053951-A (KR)
Inventor: BAE GI YEOL
IPC: C10B21/18
Filed: 2000-12-26
Abstract: PURPOSE: A system for burning flying gases in door of coke oven is provided to suppress air pollution by separating and collecting noxious gases dispersed or exhausted into the air so that the collected noxious gases are completely burned in the combustion chamber of the coke oven before being released into the air. CONSTITUTION: The system for burning flying gases in door of coke oven comprises a collection means which is equipped with a plurality of dust collection hoods(30), venturi pipe hood lines(31), cutout open-and-shut electric powered valves(32) and automatic hood part gas sensing sensors(33), wherein the dust collection hoods(30) are positioned at the upper side of left and right single doors(12-1,12-2) of carbonization chambers of a coke coven; a control unit means in which a collection line(35) is connected to the side of an end platform(36) of oven structure, the inlet part of the collection line(35) is connected to venturi scrubbers(40,40-1 to 40-6), and at one side part of which a blower(50) and a rotation adjusting inverter control motor(60) are equipped; an oven door noxious gas incineration means in which a discharge transfer line(50-1) and a gas gathering pipe(70) are connected to the outlet side of the blower(50) so that they are gathered to a gathering pipe, a combustion branch pipe(70-1) separated from the gathering pipe and connected to combustion chamber upper layer part holes(80-1,80-2) is equipped at one side of the gathering pipe, electric powered control valves(70-2,70-3), a combustion chamber(80) and combustion sensing differential pressure sensors(70-4,70-5) are equipped on each of separated branch pipes; and a control means equipped with an automatic control panel(90) for controlling operation of units contained in each of the above means.
Patent KR-20010016610-A (KR)
Title: cover tape detach device for manufacturing semi-conductor
Inventor: SUN HYO DEUK
IPC: H01L23/02
Filed: 2000-12-27
Abstract: PURPOSE: An apparatus is provided to automatically eliminate a protecting tape adhered to a circuit tape, by using a collecting tape which is collected by being wound around a collecting role. CONSTITUTION: A transfer unit transfers a circuit tape. A tape removing unit(30) removes a protecting tape adhered to the circuit tape transferred by the transfer unit, disposed in a lower portion under a central portion of a transfer path of the transfer unit. A tape roll(44) around which a collecting tape(42) is wound is mounted in the a supporting unit(32), wherein the collecting tape has an adhesive surface. A plurality of guiding rollers(46) are mounted in an upper end of the supporting unit, and make the collecting tape untied from the tape roll pass through an upper portion of the supporting unit. A collecting role(48) is mounted in the supporting unit, and winds/collects the collecting tape passing through the guiding roller. A driving motor is connected to the collecting role to drive the collecting role. A pressure block(52) is mounted between the guiding rollers for being capable of elevating, and is elevated by an elevating unit(54) to elevate and press the collecting tape.
Patent KR-20020053534-A (KR)
Title: Method of forming a copper wiring in a semiconductor device
Inventor: KIM HEON DO
IPC: H01L21/28
Filed: 2000-12-27
Abstract: PURPOSE: A method for forming the copper wiring of a semiconductor device is provided to maintain an effective resistance of a trench ideally and to enhance reliability of the wiring by forming the copper wiring after forming a diffusion barrier film instead of a diffusion barrier conductive film. CONSTITUTION: A lower copper wiring(12) and an insulation film are formed on a semiconductor substrate(11). The insulation film is formed by successively stacking a copper diffusion barrier layer(13), the first insulation film(14), an etching barrier layer(15), a second insulation film(16) and a hard mask layer(17). A dual damascene pattern consisting of a contact and a trench is formed on the insulation film. After the dual damascene process, the lower copper wiring is exposed and a copper oxide film is formed. The diffusion barrier insulation film(19) is formed on the dual damascene pattern. The hard mask layer is exposed by etching the diffusion barrier insulation film and the copper oxide film is removed. After forming a copper seed layer, the upper copper wiring(20) is formed by a heat treatment process and a CMP process.
Patent KR-20020054261-A (KR)
Title: Method of the automatic meter reading through the indoor line except power line
Inventor: KIM YOUNG RO
IPC: G08C19/00
Filed: 2000-12-27
Abstract: PURPOSE: A telemetering data collecting method using an indoor line except a power line is provided to freely collect checked data regardless of time and place, and the condition of the power line with maintaining a high degree of reliability. CONSTITUTION: The telemetering data collecting system using an indoor line except a power line is comprised of receptors having meters to be checked in a telemetering manner; collection control transmission devices for receiving and calculating pulse signals from the meters to make inspection data in a signal form; and a relay transmission device for processing signals from an indoor line as a signal passage to restore the checked data and sending the data to a collection center through an internet network.
Patent KR-20020058400-A (KR)
Title: A Lubricating Oil Sensing Method Using A Float Switch
Inventor: LEE SU HYEONG
IPC: F01M11/12
Filed: 2000-12-30
Abstract: PURPOSE: Misoperation of a lubricant sensing device is prevented by applying a float switch in gear box, and a delay time by a timer maintains a fluent operation. CONSTITUTION: A spindle(200) in a gear box(100) is operated. A float switch(300) installed in upper part of the gear box(100) checks whether a lubricant overflows. If then, the spindle is stopped for a while. Then the float switch checks again whether the lubricant overflows. If not, the operation state of the spindle is maintained. If the lubricant overflows, the operation of the spindle is stopped.
Patent KR-20010021884-A (KR)
Title: 감소된 ｈ２ 민감도를 갖는 광섬유
IPC: G02B6/00
Filed: 1998-06-24
Abstract: 본 발명은 수소에 내성을 갖는 광도파관 섬유의 제조방법에 관한 것이다. 수트 예비성형품은 가열되고 금속 할로겐화물 가스에 함침된다. 따라서, 환원된 금속종들이 상기 수트 예비성형품의 소결 또는 소고 전에 유리 수트에 포함된다. 약 1530nm의 수소 흡수대역이 전구물질 가스 처리된 예비성형품으로부터 제조된 도파관으로부터 실질적으로 제거된다.
Patent KR-20010023986-A (KR)
Title: 다중의 연마 입자등급을 포함하는 연마 슬러리 및 연마 물품
IPC: B24D3/00
Filed: 1998-09-16
Abstract: 연마 슬러리, 연마 슬러리로부터 만들어진 연마 물품, 및 연마 물품을 생성하기 위한 방법이 개시된다.  연마 슬러리 및 이로부터 만들어진 연마 물품은 적어도 2개 등급의 연마 입자 (즉, 더 큰 제 1 등급, 및 더 작은 제 2 등급)을 포함한다.  연마 등급은 약 2의 평균 입자 크기 비율을 갖고, 여기서 평균 입자 크기 비율은 더 작은 등급의 연마 입자의 평균 입자 크기에 의해 나뉘어진 더 큰 등급의 연마 입자의 평균 입자 크기와 동등하다.
Patent KR-20010032309-A (KR)
Title: 프로그램 가능 비휘발성 다-비트 메모리 셀을 포함한메모리 장치와 셀의 메모리 상태 구분용 장치 및 방법
IPC: G11C11/56
Filed: 1997-12-11
Abstract: 다-비트 메모리 셀의 메모리 상태는, 메모리 상태의 경계를 구성하는 레벨을 갖는 판독 기준 신호를 생성하여 구분되어진다. 판독 기준 신호는 메모리 셀을 프로그래밍 하는 것을 제어하는 데 이용되는 프로그래밍 기준 신호의 레벨에 의존한다. 따라서, 메모리 셀은 프로그래밍 처리 중에 자신의 메모리 상태를 독출하지 않고도 프로그램될 수 있다. 기준 신호의 양 세트는, 온도 및 시스템 전압과 같은 조건의 변화에 따른 메모리 셀의 동작 특성의 변화를 추종하는 기준 셀에 의해 생성되어 메모리 프로그래밍 및 판독의 신뢰도를 향상시킨다.
Patent KR-20010032748-A (KR)
Title: 장치 제어를 위한 정보 처리 시스템 및 방법
IPC: G06F3/14
Filed: 1999-09-30
Abstract: 정보처리 시스템은 전자장치 및 이 전자장치의 기능성을 제어하는 제어기를 갖는다.  제어기엔 기능성의 초상표현이 제공된다.  추상표현은 기능성을 제어하는 양식을 드러낸다.  제어기는 추상표현과의 상호작용을 통해서 기능성을 제어할 수 있게 한다.  양식은 기능성의 제어를 제어기의 양식으로 호환되는 제어능력에 연관시키는 것을 제어한다.  드러난 양식은 예를 들면 "부울린", "부동", "정수 어레이"일 수 있다.
Patent KR-20010033980-A (KR)
Title: 개질 폴리프로필렌계 수지 및 폴리스티렌계 수지의혼합수지 압출발포 보드
IPC: C08J9/00
Filed: 1999-11-09
Abstract: 본 발명은 두께가 두껍고 독립기포율이 높으며 평균 기포직경이 작은 저밀도 폴리프로필렌계 수지 압출발포 보드를 제공한다.  상기 수지 보드는 (a) 230℃에서의 용융장력이 0.05N 이상인 폴리프로필렌계 수지 50∼95 중량부, (b) 폴리스티렌 수지 50∼5 중량부, 및 (c) 폴리프로필렌계 수지 (a) 및 폴리스티렌 수지 (b)의 합계 100 중량부에 대해 수소화된 스티렌-이소프렌-스티렌 블록 공중합체 0.5∼15.0 중량부를 혼합한 혼합수지와 발포제를 압출기로 혼합하고, 저압대로 압출함으로써 얻어지며 밀도 50∼10 kg/㎥, 독립기포율 40% 이상인 압출발포체이다.
Patent KR-20010040510-A (KR)
Title: 전환가능한 감광성을 가진 유기 다이오드
IPC: H01L51/00
Filed: 1999-02-02
Abstract: 전극/유기물/전극 구조에서 유기 광활성 층을 사용하여 전환가능한 감광성을 가진 유기 광검출기가 달성된다.  감광성은 검출기를 교차하는 바이어스 전압에서 온 및 오프로 전환될 수 있다.  루프에서 판독 회로를 사용하여 광전류를 조사할 수 있다.  이러한 광검출기는 고 성능, 선형 또는 2 차원 영상 감지기로서 작용하는 선형 배열 또는 2차원 매트릭스로 배열될 수 있다.  이러한 영상 감지기는 순색 또는 선택된 색 검출 능력을 달성할 수 있다.
Patent KR-20010106093-A (KR)
Title: 중공 버섯형밸브 및 그 제조방법
IPC: F01L3/24
Filed: 1999-02-12
Abstract: 페이스면에 용접열의 영향이 작용하지 않고, 용접부에 응력이 집중하지 않도록 함으로써, 중량에 비해 고강도인 특성이 향상된 중공 버섯형밸브 및 그 제조방법을 제공하기 위하여, 원통 형상의 스템부(12) 일단에 나팔 형상으로 관통된 귀접이 영역(14)이 일체형으로 형성되고, 귀접이 영역(14)이 관통된 가장자리부에 뚜껑(16)을 용접하여 일체화된 중공 버섯형밸브에 있어서, 귀접이 영역(14)이 관통된 가장자리부만 타영역보다 두꺼운 두께살로 형성하고, 이 두께살부(30)에 페이스면(15)을 형성함으로써, 뚜껑 용접열에 의해 페이스면(15)의 경도가 저하되는 것을 억제하고, 용접부(20)에 응력이 집중하는 것을 방지하여, 중량에 비해 고강도인 특성을 개선하였다.
Patent KR-20010025067-A (KR)
IPC: B32B7/12
Filed: 1999-05-19
Abstract: Formulations containing reaction products of epoxy compounds with active hydrogen-containing compounds such as amines and carboxylic acids having unique adhesive and other properties are disclosed. Laminates of various films and/or foils made with such formulations have desirable properties for packaging of food and other products.
Patent KR-20010052784-A (KR)
Title: 알카리 전지용 밀봉구조
IPC: B29C45/26
Filed: 1999-06-10
Abstract: 음극 집전 장치(10)가 삽입 홀(28a)의 내부에 삽입된 후, 수지 밀봉 요소(28)와 음극 터미널 플레이트(12)가 전지 케이싱(1)의 개구(1a)에 계속해서 삽입되고, 상기 전지 케이싱(1)의 개구 가장자리가 상기 전지 케이싱(1)의 개구(1a)를 밀봉하기 위해 안으로 구부러져 주름지게 된다. 밀봉 요소(28)는 전지 케이싱(1) 내에서 음극 터미널 플레이트(12)에 접하는 배치로 수용되고, 수지 주입 게이트(28c)가 수지 몰딩 동안에 메탈 몰드(22-24)의 수지 주입 포트(27a)에 대응하여 상기 전지 케이싱(1)의 개구 단부에 위치된다.
Patent KR-20020057654-A (KR)
Title: Apparatus and method for controlling velocity of DC motor
Inventor: CHO JUN IL
IPC: H02P5/00
Filed: 2001-01-03
Abstract: PURPOSE: An apparatus and a method for controlling speed of a DC motor are provided to control precisely speed of the DC motor within 2ms without using an interrupt. CONSTITUTION: A speed control apparatus comprises a signal input unit(10), an encoder(12), a decoder(14), a PWM comparator(16), and a PWM signal generator(18). The signal input unit(10) generates pulses in predetermined inch interval by using a first and a second input signals and outputs them. The encoder(12) counts pulse intervals and stores the counted values. The PWM comparator(16) outputs a PWM on-time and a PWM cycle-time which are calculated by using a reference on-signal determined in correspondence with an error between the counting value corresponding to the reference speed and the stored counting value. The PWM signal generator(18) generates a first and a second motor control signals in response to the PWM on-time and the PWM cycle-time for controlling speed and direction of the DC motor.
Patent KR-20020065130-A (KR)
Title: Sylindrical Biofilter Filtrating with Lateral Surface
Inventor: HONG MIN YEONG
IPC: B01D39/14
Filed: 2001-02-05
Abstract: PURPOSE: A lateral surface filtering type biofilter is provided in which polluted air is introduced into in a direction of lateral surface of the biofilter to maximize an inflow cross-sectional area of the polluted air, and a purification method of polluted air using an electric biofilter is provided. CONSTITUTION: The lateral surface filtering type biofilter comprises a cylindrical housing part(3) equipped with upper and lower surfaces at the center of which a vent(1) is positioned, wherein an inlet(2) is formed on the lateral surface of the housing part; and a filter part(7) formed in a doughnut type cylinder shape which is positioned inside the housing part, in which a filter filling material is filled in a space between a concentric circle shaped net type outer wall(4) and a net type inner wall(5), and a cavity of the center of which is connected to the vent(1) of the housing part, wherein the lateral surface filtering type biofilter further comprises an injection pipe(6) which is positioned at the upper part of the housing part(3) to supply moisture and nutritive elements to the filter filling material, and a flow meter(8) which is attached to the vent of the housing part to measure the amount of air treated, the filter filling material comprises activated carbon capable of adsorbing polluted air outstandingly, compost used as a culture medium of microorganisms, sawdust and microorganism source, and the microorganism source is a supernatant of a culture fluid which is prepared by cultivating activated sludge obtained from a sewage disposal plant or a supernatant of castings of an earthworm. The method for purifying polluted air using the lateral surface filtering type biofilter comprises the steps of flowing the polluted air into the inlet(2) of the lateral surface filtering type biofilter, and exhausting the purified air through the vent.
Patent KR-20020065946-A (KR)
Title: Sports-game service system
Inventor: KANG HANG BONG
Filed: 2001-02-08
Abstract: PURPOSE: A sports game service system is provided to train an avatar according to a game winning percentage and amount of a real world exercise, and to make the trained avatar participate in various sports game according to a game schedule. CONSTITUTION: The system comprises a sports game offering server(10), a subscriber terminal(30), a portable terminal(50) and an offline game machine(60). The subscriber terminal(30) connects to the portable terminal(50) for receiving information of exercise done by the subscriber in a real world. The portable terminal(50) has a shape of a wrist watch which the subscriber can wear when taking exercise. The portable terminal(50) includes a display, an operation start button, a mode selection button, a reset button, a parallel port and a serial port. The parallel port connects to the subscriber terminal(30), and the serial port connecting to the offline game offering machine(60). So the exercise information, collected by the portable terminal(50), is transmitted to the sports game offering server(10) via the subscriber terminal(30). The subscriber terminal(30) enables a subscriber to select at least one among various sports games. The sports game offering server selects preliminary game players based on a game level of the trained avatar, and enables the subscribers, passing the preliminary game player selection process, to enjoy a sports game. The game level of the trained avatar is determined based on the amount of exercise and the game winning percentage of the subscriber.
Patent KR-20010035430-A (KR)
Inventor: KIM JU HO
IPC: B09B5/00
Filed: 2001-02-13
Abstract: PURPOSE: A screening and treatment equipment of adulteration and food waste is provided, which can treat adulteration and food waste by physicochemical method including an ultrasonic generator, a UV lamp, an electron accelerator and an air and anionic oxygen generator. The treated food waste can be recycled as a fertilizer and feed, thereby removing offensive odor and coloring material of the treated water separated from the food waste, and also secondary pollution such as soil contamination are prevented. CONSTITUTION: The system comprises the followings: (i) a treatment tank (1) that has an impeller (2) installed at the bottom for crushing food waste, a waste outlet (3) installed at the bottom for discharging crushed fine waste, an adulteration outlet (5) set at the bottom and a heavy material outlet (4); (ii) a filter medium feed inlet (10) for feeding an adsorbent to salt and various contaminants(COD, BOD) contained in food waste; (iii) an ultrasonic wave generator (20) for generating ultrasonic wave to decompose organic material and non-biodegradable material by strong oxidation, reduction and sterilization using pulse energy generated from sonic wave; (iv) a UV lamp (30) for decomposing offensive odor and coloring material by ozone; (v) an electron accelerator (40) for accelerate decomposition of non-biodegradable organic material by vibration generated from magnetic field; and (vi) an air and anionic oxygen generator (50) for promoting oxidation and reduction by OH- ion generated from anionic oxygen.
Patent KR-20020068645-A (KR)
Title: Dash Board have flocking cover of car
Inventor: YOON JOO IK
IPC: B62D25/14
Filed: 2001-02-21
Abstract: PURPOSE: A dashboard having a flocking cover in a vehicle is provided to relieve fatigue, and to drive safely by widening the visual field of a driver with absorbing and reducing diffused reflection through the dashboard during traveling. CONSTITUTION: A flocking cover(130) is mounted in the surface of a dashboard(100) in a vehicle, and pile(111) or powder is stuck in the flocking cover. The flocking cover is made of textile or leather(131), and a flocking surface(110) is formed in the dashboard. Adhesive is sprayed on the leather or textile, and the pile is mounted in the leather or textile by supplying current in installing in a flocking machine. The pile is flattened in the leather or textile, and various color powder is stuck by distributing evenly to improve appearance. The quality is improved with installing the flocking cover in the dashboard of the vehicle, and accidents are prevented with minimizing fatigue by absorbing and reducing diffused reflection.
Patent KR-20020069519-A (KR)
Title: Device for binding fitting portion of store container made by rotation forming method
Inventor: KIM HYEON UK
IPC: B65D8/02
Filed: 2001-02-26
Abstract: PURPOSE: A fitting part fastening device of a storage container manufactured by a rotation molding method is provided to simplify the fastening structure of a fitting part as well as prevent the damage and the leakage caused at the fitting part by adopting a back flange manner in the manufacture of the fitting part. CONSTITUTION: The fitting part fastening device of a storage container manufactured by a rotation molding method comprises a lower flange(19) to be inserted into a hole formed in the container, which is installed with a plurality of bolt members(21) projected along the circumference of the top surface thereof; an upper flange(17) disposed over a container body(13) in corresponding to the lower flange, which is formed with a plurality of penetrating bores(23) corresponding to the bolt members; upper and lower gaskets(15a,15b) inserted between the upper and lower flanges and the body for damping and tight contacting therebetween, which are formed with the penetrating bores for the bolt members; and nut members(25) fastened with the bolt members of the lower flange to fix the flanges and gaskets.
Patent KR-20020004806-A (KR)
Inventor: HORIKOSHI HIDEKI
IPC: F16L11/08
Filed: 2001-02-26
Abstract: PURPOSE: To provide a new brake hose to sufficiently satisfy fatigue resistance and corrosion resistance and excellent in expansion resistance. CONSTITUTION: A first reinforcing fiber layer 2 is constituted of polyethylene-2,6- naphtalate fiber on a brake hose constituted by sequentially providing the first reinforcing fiber layer 2, intermediate rubber 2, a second reinforcing fiber layer 4 and outer layer rubber 5 on an outer periphery of inner layer rubber 1 filled with brake liquid.