baber/WOPTO huggingface dataset:
Patent KR-20030020709-A (KR)
Title: Apparatus and method for generating voltage supplied for inkjet head
Inventor: LEE CHUN HONG
IPC: B41J2/385
Filed: 2001-09-04
Abstract: PURPOSE: A device and a method for generating supply voltage for an ink jet head are provided to make users pay attention to the use by informing the users of the voltage supply state supplied to an ink jet head and to reduce the size of a voltage generator. CONSTITUTION: A voltage generating unit(16) outputs the supply voltage generated with response to a return signal to an ink jet head via an output terminal. The ink jet head jets ink with response to the supply voltage inputted from the voltage generating unit. A comparing unit(20) compares the supply voltage outputted from the voltage generating unit to a first reference voltage and outputs a result as a return signal to the voltage generating unit.
Patent KR-20030020994-A (KR)
Title: Ejector pin supporter for imprinting rod number of metal mold method
Inventor: KOO JA HONG
IPC: B29C45/40
Filed: 2001-09-05
Abstract: PURPOSE: A supporting apparatus for an ejector pin for carving a lot number for a molding device is provided to change the ejector pin easily by installing the ejector pin carved with the lot number to a molding box. CONSTITUTION: A supporting apparatus for an ejector pin(5) for carving a lot number for a molding device has a change bar(8) and a slant portion(9). The change bar is installed to a side of a core plate(1) under a fitting hole(2). The change bar is inserted and deserted. The slant portion is installed to a tip of the change bar. The slant portion supports a lower end of the ejector pin. A carving portion(6) of the tip of the ejector pin carves the lot number by a combination of cores(3) and the core plate and a parting operation. The ejector pin is separated from an upper portion of the core plate by pulling one side of the change bar. Therein, the carving portion is changed easily. Consequently, changing time is reduced without deformation and damage of the ejector pin.
Patent KR-20030024981-A (KR)
Title: Structure for securiting a night viewer of vehicle
Inventor: YANG DONG SU
IPC: B60R1/12
Filed: 2001-09-19
Abstract: PURPOSE: Structure for securing the field of rear vision at night, in a vehicle is provided to stably secure the field of rear vision at night and prevent accidents. CONSTITUTION: Structure for securing the field of rear vision at night in a vehicle comprises a tailgate installed on the rear surface of a body; a flip-up glass; and a rear under view mirror(10) disposed on the tail gate. The tailgate is moved up and down. The upper end of the flip-up glass is rotatably coupled with the upper front surface of the tailgate. The rear under view mirror has an illuminating device(100) irradiating light in the rear of the vehicle. The illuminating device comprises a guider(110) disposed on a side of the rear under view mirror and lamps(120) disposed on both inner sides of the guider. The guider has a reflecting plate on the inner peripheral surface. The lamp emits light and irradiates light rearward through the reflecting plate of the guider.
Patent KR-20030025720-A (KR)
Title: Manufacture of heat reserving materials using Cu-making slag
Inventor: KIM YEON SUK
IPC: C04B28/26
Filed: 2001-09-20
Abstract: PURPOSE: Provided is a manufacturing method of heat storage materials(like bricks), replacing conventional expensive heat storage materials, by using copper slag generated from copper refining. The resultant bricks have high heat storage capacity and thermal shock resistance. CONSTITUTION: The heat storage bricks are manufactured by mixing 30-70wt.% of copper slag, 30-70wt.% of clay and water glass(5-10%), aging for 1-7days, forming into a brick shape, drying at 50-90deg.C, and sintering at 750-1150deg.C for 15-30hrs. The copper slag generated from copper refining comprises 0.7-1.1wt.% of Cu, 3-10wt.% of Fe3O4, 36-48wt.% of Fe, 0.7-5.0wt.% of CaO, 0.7-1.2wt.% of MgO, 27-34wt.% of SiO2, and 2.5-5.5wt.% of Al2O3.
Patent KR-20010103827-A (KR)
Title: 지문인식기를 이용한 사물함 통제시스템
Inventor: SONG HONG DUK
Filed: 2001-10-09
Abstract: 본 발명은 지문인식기를 이용한 사물함 통제시스템으로서 기존의 공지된 사항으로서의 지문인식기의 장점을 최대한 활용하여 스포츠센타·목욕탕, 공공시설 사물함, 체육관 사물함, 일반회사 사물함 등에 보다 안전성을 높여 사용할 수 있는 사물함통제 시스템이다. 
     즉, 지문인식기를 이용하여 사용자의 지문을 등록한 후 운영 시스템에서 자동으로 개인 사물함을 배정하게 되고, 사용자의 사용이 끝이나면 운영시스템에서 해당 사물함의 지문정보를 삭제하여 다른 사람이 사용할 수 있도록 하는 지문인식기를 이용한 사물함 통제시스템에 관한 것이다.
Patent KR-20020028835-A (KR)
Title: Cleaning method
Inventor: ABE KOJIRO
IPC: H01L21/311
Filed: 2001-10-10
Abstract: PURPOSE: Provided is a cleaning method which can easily remove firm deposits to the surface of a material to be treated without giving damage to the material to be treated. CONSTITUTION: The cleaning method is characterized in that the surface of the material to be treated is cleaned by making a cleaning agent flow onto the surface of the above surface at high speed. At this time, the cleaning agent is contained an oxidizing agent, a chelate agent and fluorine compounds.
Patent KR-20020006498-A (KR)
Inventor: KIM JUNG HEE
IPC: C12M1/34
Filed: 2001-10-11
Abstract: PURPOSE: An incubator for cultivating cells is provided, thereby preventing cells from being contaminated by bacteria and the like. CONSTITUTION: The incubator for cultivating cells consists of a main body(100) having a multiple incubation vessel(210) and a chamber(110); a cover(200) which is linked to the upper part of the main body(100) so as to form a closed area inside the chamber(110) and has a door(220) through which the cultivation vessel is injected or discharged; a microscope(300) which is mounted on the inside of the chamber(110), and consists of a plate, an object lens and an eye lens, wherein the object lens projects to the outside of the cover(200) by a first sealing means; an operating part(400), where operating gloves are linked by a second sealing means; and a controller(500) mounted on the main body(100) so as to control the condition of the chamber.
Patent KR-20030036942-A (KR)
Title: Method for greening wild ground
Inventor: CHOI SUNG HOON
IPC: A01G1/00
Filed: 2001-11-01
Abstract: PURPOSE: A method for afforestation of barren soil is provided, thereby easily tree-planting barren soil, such as a revetment, cutting area and the like. CONSTITUTION: A method for afforestation of barren soil comprises the steps of: culturing a tree in a porous tree-planting box(50); separating the tree and porous tree-planting box(50) in a body; and digging a cavity in the barren soil and transplanting the tree and porous tree-planting box(50) into the cavity, wherein the method further comprises installing a wire net for preventing a rock-slide and cutting the wire net according to the size of the cavity; and the tree-planting box(50) is made of environment friendly material.
Patent KR-20030039442-A (KR)
Title: Plate for protecting street trees
Inventor: CHA BYOUNG KUG
IPC: A01G13/02
Filed: 2001-11-13
Abstract: PURPOSE: A roadside tree guard board is provided of which longevity can be lengthened since it is rarely cut by an impact caused by the load of a pedestrian because of its light-weight and superior endurance. CONSTITUTION: The roadside tree guard board comprises: a 10 to 30 weight portion(a) of urethane prepolymer generated by reaction between a polyisocyanate compound and a first polyol compound; a 30 to 50 weight portion(b) of a second polyol compound; a 0.05 to 0.5 weight portion(c) of a catalytic compound; a 20 to 50 weight portion(d) of filler; a 1 to 5 weight portion(e) of a plasticizer; and a 0.05 to 0.2 weight portion(f) of a stabilizer. The roadside tree guard board is made by hardening a composition having a 0.65 to 1.3 molar ratio of isocyanate group of the polycyanate compound to total hydroxyl group of the first and second polyol compounds.
Patent KR-20030041395-A (KR)
Inventor: YOON YEONG HAN
IPC: B62D25/22
Filed: 2001-11-20
Abstract: PURPOSE: A folding side step of a vehicle is provided to decrease assembling process by restricting interference with an assembly line for two or more kinds of vehicles with modifying the side step, and to improve appearance by folding the side step in not using. CONSTITUTION: A folding side step(200) comprises upper and lower steps(210,220) combined with each other by a hinge part(230); a fixing end containing part(211) protruded at the side of the upper step and recessed; a fixing end(221) protruded at the side of the lower step, and inserted to the fixing end containing part; and a locking unit(212) locking and releasing in storing the fixing end in the fixing end containing part. Passengers conveniently get on and off by assembling the upper part of the side step with the vehicle body. Assembling process is reduced by restricting interference, and appearance is improved by folding the side step.
Patent KR-20030041492-A (KR)
Title: vehicles's ash tray
Inventor: LEE SEUNG GEON
IPC: B60N3/08
Filed: 2001-11-20
Abstract: PURPOSE: An ashtray for a vehicle is provided to install and separate the ashtray conveniently by forming a recess in the lower part of the ashtray and mounting a spring plate, and to improve convenience by preventing displacement of the ashtray against vibration and impact. CONSTITUTION: An ashtray comprises an ashtray holder part formed in a trim of a rear seat; a spring plate(130) fixed at the side of the ashtray holder part and composed of projections(120) at both sides; a body including a storage part and fitting to the spring plate; a rotating shaft(104) rotated and installed in the body; a supporting bar(106) moving in turning the rotating shaft; and a cap(100) fastened in the end of the supporting bar and contacted to the upper part of the body. A recess(122) is formed in the lower part of the body, and combined with the projection of the spring plate. The ashtray is installed and removed easily by using the elastic spring plate, and used conveniently by restricting displacement of the ashtray against vibration or impact.
Patent KR-20030045893-A (KR)
Title: Method for hot key to support by grouping in telephone terminal
Inventor: KIM HO GYU
IPC: H04M1/27
Filed: 2001-12-03
Abstract: PURPOSE: An abbreviated dialing method using groups in a telephone terminal is provided to divide desirous telephone numbers to register the divided numbers in a telephone book according to each abbreviated dialing group, and to display an abbreviated dialing group and an abbreviated number of an originating telephone number, thereby easily using an abbreviated dialing function. CONSTITUTION: A portable terminal is in a standby state(S210). A user inputs a number by operating a number key of a key input unit(S220). The portable terminal confirms whether the inputted number is a group number showing an abbreviated dialing group(S230). If so, the portable terminal displays a name of the abbreviated dialing group, an abbreviated number, a user name, and a telephone number on a display(S240). The portable terminal waits until the number key is inputted(S250). The portable terminal confirms whether a dial is requested(S260). If so, the portable terminal dials a corresponding telephone number(S310).
Patent KR-20030050721-A (KR)
Title: Exhaust gas reduction controlling method for automatic transmission of vehicle
Inventor: KWON YEONG SU
IPC: F02D43/00
Filed: 2001-12-19
Abstract: PURPOSE: A method for controlling the reduction of the exhaust gas of an automatic transmission vehicle is provided to reduce the amount of exhaust gas by preventing the occurrence of unnecessary speed change delay when a speed change pattern is changed. CONSTITUTION: A method for controlling the reduction of the exhaust gas of an automatic transmission vehicle comprises the steps of detecting an exhaust gas reduction pattern entrance condition(S210,S212), detecting the engine rpm of a vehicle if the detected condition satisfies the exhaust gas reduction pattern entrance condition(S214), and changing a speed change pattern to an exhaust gas reduction speed change pattern if the detected engine rpm is over a predetermined engine rpm(S220).
Patent KR-20030053202-A (KR)
Title: Method of manufacturing flash memory for low operation voltage
Inventor: KIM JONG IL
IPC: H01L27/115
Filed: 2001-12-22
Abstract: PURPOSE: A method for fabricating a low voltage flash memory is provided to generate low current and embody low power consumption through a low voltage by dividing the voltage applied to a conventional control gate and applying -8 volt to a control gate and +5 volt to a source so that the voltage across a gate and a channel becomes -13 volt. CONSTITUTION: Voltages of opposite polarities are applied to the control gate(19) and the source(or a gate) to implant electrons into a floating gate(17) through a program operation. Voltages of opposite polarities are applied to a silicon sub and the source(or a drain) to extract the electrons implanted into the floating gate through an erase operation.
Patent KR-20030053554-A (KR)
Title: method for manufacturing a diffusion barrier layer
Inventor: CHOI GYEONG GEUN
IPC: H01L21/205
Filed: 2001-12-22
Abstract: PURPOSE: A method for forming a diffusion barrier layer is provided to be capable of improving adhesive force with a conductive layer and restraining stress in thermal processing. CONSTITUTION: The first insulating layer(206) having a via hole(222) is formed on a semiconductor substrate(200) having a conductive layer(202). The second insulating layer(216) having an opening part(220) is formed on the first insulating layer. A titanium film(230), a nickel film and a copper film(236) are sequentially formed in the via hole and the opening part to connect the conductive layer(202). A Ni-Cu alloy(233) as a diffusion barrier layer is formed between the titanium film(230) and the copper film(236) by annealing.
Patent KR-20030054749-A (KR)
Title: Status Management Apparatus for Mobile Communication System
Inventor: KIM YUN HUI
IPC: H04L12/24
Filed: 2001-12-26
Abstract: PURPOSE: A device for managing a status of a mobile communication system is provided to supply all information in a status block without additional load, when supplying various status information for operators such as GUIs, thereby supplying status management information in large quantities without additional load. CONSTITUTION: A BSM(Base Station Manager) STM(Status Manager)(10) comprises as follows. A command input module requests an inputted command of a BSS(Base Station Subsystem)(20). A response command performing module processes a response for the request and a report from the BSS(20). At least two keep-alive processing modules process statuses of all processors and devices of the BSS(20) in a keep-alive method. A DB(30) stores keep-alive messages processed by the response command performing module and the keep-alive processing modules. At least one GUIs(40) input MMCs(Man Machine Commands) of operators with the command input module in reference to contents stored in the DB(30).
Patent KR-20030058339-A (KR)
Title: A chuck for exposure
Inventor: KIM YONG HUN
IPC: G02F1/1343
Filed: 2001-12-31
Abstract: PURPOSE: A chuck mounted on an exposing device for producing an array substrate for In Plain Switching(IPS) LCD is provided to prevent a stain generated by the light reflected at a pin hole. CONSTITUTION: The chuck mounted on an exposing device for fixing a substrate(120) comprises a first and a second pin holes(104) formed on the center line of the square shaped chuck(100) symmetrically each other, a third and a forth holes(104) formed on the line intersecting the central point of the center line symmetrically each other, and a pin(102) which is movable upward and downward and located at the inner part of each pin holes(104).
Patent KR-20010079572-A (KR)
Title: Reactive dyes containing a linkage
IPC: D06P1/382
Filed: 1999-07-26
Abstract: A reactive disazo dye of the formula (I) D1-Y-D2 wherein each of D1 and D2 is a chromophore of the formula (II)in which X is fluorine, chlorine or optionally substituted pyridinium, an SO3H is present in the 5-or 6-position of the naphthalene nucleus, n is 0 or 1, and Y is a bridging group or a sulphonic acid salt of the dye of formula (I). The dyes may be used for dyeing, printing or ink-jet printing, for example, of textile materials and paper and are particularly valuable for coloring cellulosic textile materials.
Patent KR-20010090438-A (KR)
IPC: G10L19/12
Filed: 1999-09-10
Abstract: 오리지널 음성 신호에 대한 부호화 정보로부터 오리지널 음성 신호에 근사한 추정 신호를 생성함에 있어서, 오리지널 음성 신호와 관련한 현재 파라미터들(EnPar(i))은 부호화 정보로부터 결정된다. 상기 파라미터들 중에서 적어도 하나의 현재 파라미터와 오리지널 음성 신호의 이전 세그먼트들과 각각 관련한 이전 파라미터들을 이용하여(31)(37)(39) 변형 파라미터(EnPar(i) mod )를 생성하는 것을 통하여 오리지널 음성 신호의 잡음 성분이 재생된다. 그런 다음, 변형 파라미터는 오리지널 음성 신호의 현재 세그먼트에 근사한 추정 세그먼트를 생성하는 데에 이용된다(25)(40).
Patent KR-20010088843-A (KR)
Title: 미립자를 끌어올리고 수집하는 장치, 유체 흐름으로부터미립자를 분리하는 장치 및 방법
IPC: B04C9/00
Filed: 1999-10-07
Abstract: 공기중에 실린 먼지 등의 미립자 함유 유체를 분리하는 장치(10)는, 미립자를 순환 유체 흐름 안으로 흡입하는 코안다 송풍 홈(14)을 사용하고, 바람직하게는 와류 장치를 사용하여 미립자를 유체 흐름으로부터 분리실(13, 16) 안으로 보낸다.  상기 장치는 배출이 전혀 없는 장치이므로, 종래의 진공 청소기로는 부적당한 장소에서 적절하게 사용할 수 있다.
Patent KR-20010099933-A (KR)
IPC: A61K47/26
Filed: 1999-12-22
Abstract: 본 발명에 따라 결정 입자, 구체적으로 흡입 치료법에 적합한 제약 물질 또는 담체 물질을 제조하는 방법 뿐만 아니라, 그러한 입자의 제조를 위한 장치를 제공한다.
Patent KR-20010114209-A (KR)
Title: 폐기 가스 중에 포함되는 희박한 가스상태 탄화 수소의처리방법 및 이 방법을 실시하기 위한 장치
IPC: B01D53/81
Filed: 2000-01-31
Abstract: 희박한 가스상태 탄화 수소를 포함하는 대량의 폐기 가스를 안전하고 용이하게 또한 효율적으로 이 가스상태 탄화 수소를 분리하는 동시에, 처리 후에 대기중으로 방출하는 폐기 가스 중의 잔존 가스상태 탄화 수소 농도를 100ppm 이하로 할 수 있는 상기 폐기 가스의 처리방법 및 이 방법을 실시하기 위한 장치를 제공하는 것이다. 
     즉, 본 발명은 (1) 흡착장치로서 흡착제층과 이 층을 냉각하기 위한 흡착탑(1a, 1b)을 사용하고, (2) 이 흡착탑에 활성탄과 그 상부에 Y형 합성 제올라이트를 충전하고, (3) 흡착·탈착을 교대로 행하게 하며, 그 때의 전환 시간은 데이터 로거에 의한 “흡착제층의 파과 예상 농도”의 지시에 따라서 자동적으로 흡·탈착 전환용의 밸브(d)를 조작하고, (4) 탈착시에 “물”을 사용하여, 수봉식 진공 펌프(14)로 흡인하고, (5) 퍼지 배기 가스의 전량을 기액 분리기(16)를 통해서 폐기 가스 송풍관(11)으로 복시키고, 한편, (6) 기액 분리기(16)로부터의 액체를 산업 폐기물 처리장치(17)로 산폐 처리하는 것이다.
Patent KR-20010108240-A (KR)
Title: Method for producing building components, use thereof, airbearing workpiece and vacuum treatment chamber
IPC: H01L21/60
Filed: 2000-02-14
Abstract: A vacuum treatment chamber generates disk-shaped workpieces with directly bondable surface. The chamber is a stand-alone chamber in ambient atmosphere and has a plasma discharge section. A gas supply is operatively connected with a gas tank arrangement predominantly containing nitrogen. A workpiece holding arrangement is formed by a magazine with a multitude of slits, each for a workpiece to be simultaneously treated in said vacuum treatment chamber.
Patent KR-20020003197-A (KR)
IPC: B60T17/22
Filed: 2000-03-02
Abstract: 본 발명에 따른 골프 카(10)는 유압액 브레이크 시스템을 구비한다.  유압액 브레이크 시스템(50)은 디스크 브레이크 시스템으로서 실현되는데, 이러한 디스크 브레이크 시스템은 마스터 실린더(60)로부터 발생된 유압액 압력에 응답한다.  브레이크 페달(80) 및 연관된 링키지(42)는 마스터 실린더(60)에 입력을 제공하여 브레이크 캘리퍼 조립체(48)를 제어하도록 유압액 압력을 발생시킨다.  이러한 브레이크 페달(80)은 이동 범위를 가지는데, 이동 범위의 제 1 부분은 서비스 작동 모드를 형성하고, 이동 범위의 제 2 부분은 파킹 작동 모드를 형성한다.  파킹 작동 모드에서, 브레이크 페달(80) 및 링키지(42)는 브레이크의 적용을 유지시키도록 멈춤부(118,120)와 맞물려서, 파킹 작동 모드를 제공한다.  브레이크 시스템내의 축압기(62)는 입력 힘을 제공하여, 파킹 작동 모드를 유지하기에 충분한 유압액 압력을 유지시킨다.
Patent KR-20020021390-A (KR)
Inventor: KIM YONG SUNG
IPC: H04L29/08
Filed: 2002-01-04
Abstract: PURPOSE: A dynamic viscoelastic-viscoplastic configuration model and a viscoelastic-viscoplastic interpreting method using the same are provided to estimate a dynamic conduct in a minute and small strain modulus area of a cohesive soil when a response of a multi-ground is interpreted. CONSTITUTION: Viscoplastic and viscoelastic conducting features of a cohesive soil are detected based on a viscoelastic-viscoplastic model. In order to grasp the viscoplastic and viscoelastic conducting features of the cohesive soil, a dynamic triaxial transformation test and a numerical simulation with the dynamic triaxial transformation test are performed. A method for cyclic undrained triaxial test on soils is used to estimate a conducting feature of the cohesive soil. The method for cyclic undrained triaxial test on soils breaks the cohesive soil by dynamic-loading a stress amplitude. In the dynamic triaxial test, a dynamic loading with respect to a loading frequency is performed using sine waves of 0.01 Hz and 0.05 Hz until an axial strain ratio alternating amplitude becomes 10%.
Patent KR-20030060414-A (KR)
Inventor: CHO HYE YEONG
IPC: B09B3/00
Filed: 2002-01-09
Abstract: PURPOSE: Provided is a method for recovering waste fatty oils and waste lime by making waste lime and waste fatty oils react to eliminate alkali and salt from waste lime as soil conditioner, deodorizing agent and deoxidizer. CONSTITUTION: The method comprises the steps of mixing waste lime (including caustic lime) with waste fatty oils (including unused oils) with mixing ratio of 10:0.5-2.0; and heating the mixture in a sealed vessel at temperature of 350-900°C for saponification, thermal decomposition and carbonization of the mixture, thereby producing porous adsorbent with specific surface area of 100-800 m¬2/g.
Patent KR-20030012793-A (KR)
Title: Panel inspection apparatus
Inventor: SAWAMORI AKIRA
IPC: H01J9/42
Filed: 2002-01-19
Abstract: PURPOSE: To provide a panel inspection device whose inspecting electrode can be brought into contact with an electrode of a display panel with high precision. CONSTITUTION: In an inspection unit 24a, an upper pressure applying lever 57a and a lower pressure applying lever 57b are provided in such a way as to be movable in a direction of separating from a PDP(plasma display panel) panel 22, keeping a group of PDP electrodes 23a and an inspecting electrode 25a fixed to a fixed block 54 in the state of being held at places contactable with each other.
Patent KR-20030063501-A (KR)
Title: Multifunctional Charger of Mobile Phone and Driving Method therefor
Inventor: CHOI SEON MI
IPC: H04B1/38
Filed: 2002-01-22
Abstract: PURPOSE: A driving method for a multifunctional charger of a mobile terminal is provided to add a CID(Caller ID) display function, a receiving signal display function, a speaker phone function, and a dial function using a keypad to a battery charger of the terminal, thereby using various services while charging the terminal. CONSTITUTION: A system supplies a charging power to a battery of a mobile terminal through a communication cable connected to a communication port of the terminal, and displays a charged state(S610). The system detects a receiving signal to display whether the signal is detected, and displays and stores CID applied from the mobile terminal(S620,S630). The system designates a voice signal switching path with the mobile terminal, and exchanges a voice signal through the designated path(S640,S650). The system controls size of the voice signal outputted by inputting a volume button, and outputs the size-controlled voice signal(S660-S680).
Patent KR-20020069108-A (KR)
Inventor: FUJIWARA NOBUHIRO
IPC: B23K11/11
Filed: 2002-01-24
Abstract: PURPOSE: To provide a method and a mechanism capable of minimizing a welding time while suppressing wear at the tip of a welding rod and impact noise by using a cylinder with a cushioning mechanism that is decelerated by temporary sealing of an air pressure into an exhaust-side pressure chamber. CONSTITUTION: In this cylinder 1 with the cushioning mechanism decelerated by the temporary sealing of an air pressure into the exhaust-side pressure chamber 30, when a work is pressed by a piston rod 13 at the end of a stroke, a rapid exhaust valve 3 is operated by triggering that an internal pressure Pc in the pressure chamber 30, when a cushion caused by the temporary sealing of an air pressure into the pressure chamber 30 acts on the cylinder, is lowered less than the internal pressure Ph in a pressure-side pressure chamber 35 so as to rapidly lower the back pressure of a main piston in the pressure chamber 30.