baber/WOPTO huggingface dataset:
Patent KR-20040058882-A (KR)
Title: A Quartz crucible of grower of silicon single crystals
Inventor: LEE GYEONG SEOK
IPC: C30B15/10
Filed: 2002-12-27
Abstract: PURPOSE: A quartz melting pot of a silicon single-crystal growth system is provided to prevent the contamination of silicon solution, restrict generation of pieces of cristobalite, and lower the density of oxygen by processing a surface of the quartz melting pot. CONSTITUTION: Cristobalite powders(c) are uniformly coated on a surface of a quartz melting pot of a silicon single-crystal growth system. In the coating the cristobalite powders, the cristobalite powders are mixed with alcohol and the mixture of the cristobalite powders and the alcohol is coated on the surface of the quartz melting pot. The alcohol is formed with methanol. A volume ratio of the cristobalite powders mixed with the alcohol or the methanol is 20 to 90 percent.
Patent KR-20040061318-A (KR)
Title: Oven door apparatus for oven range
Inventor: KIM BO HYEON
IPC: F24C15/02
Filed: 2002-12-30
Abstract: PURPOSE: An oven door device of an oven is provided to enable a handle of an oven door to rotate at a predetermined angle with respect to the oven door. CONSTITUTION: An oven door(20) device of an oven comprises a door body(21) one end of which is rotated at a predetermined angle on the other end connected to an oven body, to open and shut an oven chamber; an oven handle(30) installed to front end of the door body rotatably in a direction opposite to the opening direction of the door body; a return unit returning the oven handle to the front of the door body; and a rotation drive unit rotating the oven handle by interlocking with a hinge for opening and shutting the door body.
Patent KR-20040061339-A (KR)
Title: Method for phone coloring use of smil function in mobile communication terminal
Inventor: KONG YONG MUN
IPC: H04B1/40
Filed: 2002-12-30
Abstract: PURPOSE: A phone coloring using a SMIL(Synchronized Multimedia Integration Language) function of a mobile communication terminal is provided to edit and synthesize preliminarily stored files by applying a SMIL function, thereby uniquely coloring a phone in a style wanted by a user. CONSTITUTION: A user selects a plurality of files downloaded to be used as a bell sound and a background picture to color a phone. The selected files are synthesized into synchronized multimedia integration language. The synthesized contents as the synchronized multimedia integration language is stored to be selected as a bell sound and a background picture of a mobile communication terminal.
Patent KR-20040061967-A (KR)
Title: Method for forming isolation layer of semiconductor device
Inventor: HAN CHANG HUN
IPC: H01L21/762
Filed: 2002-12-31
Abstract: PURPOSE: A method for manufacturing a semiconductor device is provided to simplify manufacturing process by using an interlayer dielectric as a gap-fill oxide layer. CONSTITUTION: A gate oxide layer(12) and a gate electrode(14) are stacked on a silicon substrate(10). An LDD(Lightly Doped Drain) region(16) is formed in the substrate. A gate spacer(18) is formed at both sidewalls of the gate electrode. A junction(20) is formed in the substrate. A trench is formed by selectively etching the substrate. A sidewall oxide layer(24) and a diffusion barrier layer(26) are sequentially formed on the resultant structure. An interlayer dielectric(28) as a gap-fill insulating layer is then formed on the resultant structure to fill the trench. Metal contact holes(30) are formed by selectively etching the interlayer dielectric.
Patent KR-20020033162-A (KR)
IPC: G06F1/16
Filed: 2001-06-08
Abstract: 본 발명은 TV 수상기에 연결시키거나 그 자체만으로 영상을 표시하고 음향을 재생시키는 역할을 하는 엔터테인먼트 장치를 제공한다.  본 발명은 음향 및 비디오 신호를 생성하여 출력하는 장치 본체(1)와, 상기 장치 본체로부터 출력된 음향 및 비디오 신호에 기초한 음향을 출력하고 영상을 표시하기 위해 상기 장치 본체에 부착된 모니터 장치(90)를 갖는다.  장치 본체는 음향 및 비디오 신호를 생성시켜 이들 신호들을 신호 출력 단자를 통해 출력한다.  모니터 장치(90)는 영상을 표시하는 표시 장치(911)와 음향을 출력하는 음향 장치(912)를 포함하는 모니터부(91), 상기 모니터부를 케이스(casing)에 연결하여 고정하는 고정부(95), 상기 모니터 장치가 케이스에 연결될 때 연결되는 신호 입력단자로부터 신호를 수신하는 신호 입력 단자를 포함한다.  모니터부(91)는 고정부(95)에 회전가능하게 연결된다.
Patent KR-20020026258-A (KR)
IPC: G06Q50/00
Filed: 2001-06-18
Abstract: 사용자로 등록하기를 희망하는 사용자는 단말 장치(20)를 이용하여 개인 컴퓨터용 웹 서버(11)에 접속하고, 회원 ID 및 패스워드를 등록하여 회원 등록 절차를 실행한다.  회원으로 등록한 사용자가 이동 전화(21)로 회원 시스템 서비스-제공 사이트를 이용하고 싶을 경우, 사용자는 이동 전화용 웹 서버(12)에 접속한다.  기등록 회원 ID 및 패스워드가 이동 전화(12)용 웹 서버에 입력되는 경우, 이동 전화용 웹 서버(12)는 이동 전화(12)에 특정한 식별 정보를 추출하여 기등록 회원 ID 및 패스워드에 링크된 식별 정보를 기록한다.  이 절차로 인해 회원 정보는 단말 장치 및 이동 전화로부터 접속될 수 있는 회원 시스템 서비스-제공 사이트에서 중점적으로 관리될 수 있다.
Patent KR-20020064284-A (KR)
IPC: G02F1/133
Filed: 2000-09-13
Abstract: 본 발명은, 하나 이상의 O 플레이트 지연자(3,3'); 네거티브 C 플레이트 지연자의 광학 성질을 갖는 하나 이상의 DAC 필름(4,4')을 포함하여 이루어지는 액정 디스플레이용 광학 보정기에 관한 것이며, 또한 이러한 보정기를 포함하여 이루어지는 액정 디스플레이에 관한 것이다.
Patent KR-20020047171-A (KR)
Title: Manufacture of sold state capacitors
IPC: H01G9/004
Filed: 2000-09-15
Abstract: The present invention concerns the field of solid state capacitors and relates particularly to massed production methods for manufacturing solid state capacitors. The present invention seeks to provide a process simplification in order to provide an economic advantage. According to one aspect of the present invention there is provided a method of manufacturing multiple solid state capacitors comprising: providing a substrate layer; forming on an upper surface of the substrate layer a plurality of upstanding bodies consisting of porous sintered valve-action material; forming a dielectric layer on the bodies; applying an electrically insulating resist layer to the dielectric layer present in a region separating adjacent upstanding bodies, forming a cathode layer on the exposed dielectric layer on the upstanding bodies and on the resist layer between the bodies; applying a cathode terminal to an upper end region of each upstanding body; dividing the processed substrate into a plurality of individual capacitor bodies each having an anode terminal portion at one end comprising divided substrate, a capacitive portion comprising ore of the porous bodies and a cathode terminal portion at the other end.
Patent KR-20030032905-A (KR)
IPC: C12N5/07
Filed: 2000-11-16
Abstract: 말초혈 단핵구세포와 인간 빌름스종양 세포주 HFWT를 혼합 배양하는 공정을 포함하는 인간 내츄럴 킬러세포의 증식방법. 예를 들면, 인간개체로부터 분리한 말초혈 단핵구세포를 사용하여 상기 인간개체 자신의 내츄럴 킬러세포를 증식시키는 것이 가능하여, 높은 세포상해활성을 유지한 상태의 내츄럴 킬러세포를 효율적으로 증식할 수 있다.
Patent KR-20020063902-A (KR)
Title: Sensing device for coded electronic ink surface
IPC: G06K15/02
Filed: 2000-10-20
Abstract: A print medium configured to be printed on by a pagewidth printhead in a print direction. The print medium includes: a laminar substrate defining first and second opposite faces; a data track containing first information encoded in accordance with a linear encoding scheme, the data track extending in a linear read direction across a portion of the first face of the print medium, the read direction being oriented at between 45 and 135 degrees with respect to the print direction; and a plurality of contiguous tags tiled across the laminar substrate. Each of the tags identifies second information and a two-dimensional coordinate position on the laminar substrate. Each of the tags is encoded in accordance with a second encoding scheme distinct from the linear encoding scheme. The information is indicative of the second information.
Patent KR-20030011772-A (KR)
IPC: A61P29/00
Filed: 2001-02-13
Abstract: 화학식 (I)의 피리미돈 화합물은 Lp-PLA 2 효소의 억제제이며 죽상경화증을 치료하는 데 사용된다. 
     <화학식 I>
Patent KR-20030019401-A (KR)
IPC: G02B27/00
Filed: 2002-03-15
Abstract: 인터그래이터/편광 변환 시스템 조합과 두 개의 논-픽실리에이티드 트위스티드 네마틱 액정 디스플레이 셀(TN-LCD) 혹은 다른 공 변조기에 의해서 생산되는 부분적으로 편광된 광이 이용된다. TN-LCD 셀상의 전압을 조절함으로써, 최소의 공급상태에 있는 컬러의 광을 바꿈이 없이 디스플레이에 의해서 사용되는, 적색, 녹색,청색 컬러의 제공되는 컬러 중 가장 많은 두 개의 상대적인 양을 조절하는 것이 가능하다. 조정의 모두는 전압 제어를 통해서 기계적이 아닌 전자적으로 행해지기 때문에, "백색" 점 정정 시스템은 단순하면서도 신뢰할 만하다.
Patent KR-20030047898-A (KR)
IPC: G06F17/30
Filed: 2002-04-11
Abstract: 데이터베이스가 하나의 계층구조로 편성되는, 하나의 데이터베이스로부터 정보를 검색하기 위한 방법이 제공된다. 이 방법은 복수의 제1 자손 또는 복수의 제2 자손에서 하나의 탐색어(2310)의 발생을 찾아내는 단계와; 상기 탐색어 발생으로부터 적어도 하나의 직접적인 관계와 간접적인 관계를 사용하여 부모(2320)의 인스턴스로 계층구조를 트래버싱하는 단계와; 부모의 상기 인스턴스로부터 직접적인 관계를 사용하여 복수의 제1 자손(2330)중 하나의 인스턴스로 계층구조를 트래버싱하는 단계와; 상기 복수의 제1 자손중 하나의 상기 인스턴스로부터 그 사이의 직접적인 관계를 사용하여 복수의 제2 자손중의 적어도 일부의 하나의 인스턴스로 계층구조를 트래버싱하는 단계와; 그리고 상기 탐색어 발생과, 부모의 상기 인스턴스와, 상기 복수의 제1 자손중의 하나의 인스턴스와, 그리고 상기 복수의 제2 자손의 적어도 일부의 하나의 인스턴스에 상응하는 콘텍스트를 만드는 단계를 포함하여 구성된다.
Patent KR-20030074116-A (KR)
IPC: D21H19/40
Filed: 2001-06-26
Abstract: 평량, 밀도, 초지방향의 영율 및 초지방향의 절단 길이 등 이 4가지 곱의 값이 1.0×10 21 g 2 ·N/m 6 이상 4.0×10 21 g 2 ·N/m 6 이하의 범위인 것을 특징으로 하는 인쇄용 도피지로서, 유연성이 뛰어나며, 백지 광택도가 낮음에도 불구하고, 화선부의 인쇄 광택도가 높고, 또 화선부의 미소한 광택 얼룩이 적으며, 또 인쇄기에서의 작업성이 양호한 도피지, 특히 광택을 없앤 무광택 도피지를 제공한다.
Patent KR-20040064925-A (KR)
Inventor: KIM BYEONG SEON
IPC: H01L21/28
Filed: 2003-01-11
Abstract: PURPOSE: A cell structure of an EEPROM device and a fabricating method thereof are provided to erase easily charges of programmed cells by forming windows on both sides of the first floating gate. CONSTITUTION: A cell structure of an EEPROM device includes a stack part and a floating gate transistor part. The stack part includes a semiconductor substrate, a first floating gate, a nitride layer pattern, a control gate, and a window. The first floating gate(107b), the nitride layer pattern(115b) including a nitride layer, and the control gate(117) are formed on the semiconductor substrate(101). The window(129) is formed on both sides of the first floating gate to erase charges of the first floating gate. The floating gate transistor part includes a gate insulating layer, a second floating gate, and a source/drain. The gate insulating layer is formed on the semiconductor substrate. The second floating gate is formed on the gate insulating layer. The source/drain is aligned to the second floating gate.
Patent KR-20040065649-A (KR)
Inventor: JI YONG SEOK
IPC: G09G3/296
Filed: 2003-01-15
Abstract: PURPOSE: An apparatus and a method for protecting a PDP(Plasma Display Panel) are provided to improve a monitoring function of the PDP by sensing voltage/current to display it. CONSTITUTION: An ADC(Analog/Digital Converter)(141a) converts into a digital signal a voltage and a current inputted to each unit of a plasma display panel or a voltage and a current outputted from each unit thereof. A determinator(141b) determines whether the voltage and the current according to the digital signal are in normal, and then generates a signal that is verified by a user. A display(141c) displays the generated signal . A processor(141d) turns off power of the respective units or blocks data according to the verified result by the user. The display displays the generated signal by using at least one of an N-segment light diode, a light diode lamp, a light diode module, and a dot-matrix panel.
Patent KR-20040066211-A (KR)
Inventor: SEO YOUNG BUM
IPC: D21B1/12
Filed: 2003-01-17
Abstract: PURPOSE: Provided is a process of physically reforming a paper fiber which significantly heightens the physical properties of the chemical pulp and the old corrugated containers, such as tensile or tear strength, under the same water retention degree. CONSTITUTION: The paper fiber reforming process comprises pulping and selecting fiber, concentrating the selected, and physically pre-treating the concentrated. With the physical pre-treatment process, the inlet-sided concentration of the concentrated fiber to be pre-treated is established to be 15-35%, and the outlet-sided temperature thereof to be 30 deg.C. The fiber is micro-compressed under the application of compressing and shearing forces such that the curl index thereof is increased by 0.03 or more.
Patent KR-20040066423-A (KR)
Inventor: JANG MYUNG SOO
IPC: A01G9/14
Filed: 2003-01-18
Abstract: PURPOSE: A frame fixing body for green house is provided, thereby preventing corrosion of frames, strongly supporting the frames and easily installing and removing the frame fixing body. CONSTITUTION: The frame fixing body(10) for green house comprises the parts of: a pile(11) which has a pipe shape to be inserted into the inner side of the frame(1); a ring-shaped waterproof element(12) which is fixed on the upper part of the pile(11); a circular supporting plate(13) which is formed in the circumference side of the upper part of the pile(11) and has ring-shaped projections(13) projected in the lower direction; and a plurality of reinforcing pieces(14) which are vertically projected from the supporting plate(13) in the upper direction and are formed in a body with the circumference side of the pile(11).
Patent KR-20040022143-A (KR)
Title: Disposable urine meter
Inventor: WOO JONG WON
IPC: A61F5/44
Filed: 2003-01-29
Abstract: PURPOSE: A disposable urine meter is provided which reduces a discharge time of urine, enables an efficient and convenient discharge operation without concern of overflow by allowing excess urine automatically to overflow to a storage bag through a discharge port, and prevents a drainage tube from being bent during packaging by making a drainage inlet tilted at a predetermined angle. CONSTITUTION: The disposable urine meter(1) comprises: a storage bag(2); a drainage inlet(3) tilted at a predetermined angle and a drainage tube(8) connected to the drainage inlet(3), installed at an upper portion of the urine meter(1); an exit port(4) and an exit valve(5) installed at a lower end of the urine meter(1); a handle(11) having a drainage tube holder(12) installed at the upper center of the storage bag(2); an air filter(14) installed at an upper portion of the storage bag(2), for air communication; and a discharge port(6), a discharge tube(9) and a discharge valve(10) installed at a lower end of the storage bag(2).
Patent KR-20040069658-A (KR)
Inventor: JUNG GYEONG HWAN
IPC: H01P11/00
Filed: 2003-01-30
Abstract: PURPOSE: A metal coating waveguide and a method for manufacturing the same are provided to allow the waveguide to have a conductor function such as a metal by constituting the waveguide with synthetic resins coated by a metal material. CONSTITUTION: A method for manufacturing a metal coating waveguide(100) comprises a step of injection molding synthetic resins supplied to a hopper, a step of inspecting a waveguide molded with a predetermined shape, a step of matching inspection for certifying a material analysis of the waveguide and matching of chemical property of matter, a step of drying completely the waveguide with a predetermined time, a step of etching the surface of the waveguide, a step of cleaning the surface and drying the surface, a step of depositing a metal material on the surface of the waveguide to receive frequencies through electroless plating, and a step of drying the waveguide again with a predetermined time at the dryer.
Patent KR-20030069809-A (KR)
Inventor: PARK HONG SOON
IPC: B26D5/04
Filed: 2003-01-30
Abstract: PURPOSE: A device for forming a groove in a cutting blade is provided to precisely define the groove, and to prevent the deformation of the cutting blade by forming the groove while one surface of the cutting blade is supported. CONSTITUTION: A pair of fixed blocks(20) are fixed to a base of a cutting blade forming device to be separated from each other by a predetermined distance. First guide units are formed at the upper and lower part of the fixed blocks. A slider(30) has a second guide unit and a third guide part. The second guide unit is coupled with the first guide unit of each fixed block, and moves up and down. The third guide unit is formed on another surface of the slider. A bite support block(40) has a fourth guide unit formed on one surface thereof and a broaching bite fixed to another surface thereof. The fourth guide unit is engaged with the third guide unit, and moves up and down. A first and second operating mechanism(51,52) operate the slider and the bite support block, respectively, up and down.
Patent KR-20040070748-A (KR)
Inventor: JUNG U JIN
IPC: G06F3/0338
Filed: 2003-02-04
Abstract: PURPOSE: A shooting game machine and an executing method thereof are provided to increase the interest of a game by changing a game environment depending on a distance between a model gun and a screen, and change an image or adjust a game level based on the coordinates directed by a player, the rotation of the model gun, and the distance between the model gun and the screen. CONSTITUTION: A display tool comprises a screen(1a), an image generator(2), and a semi-transparent mirror(3). An infrared generator(4) generates a reference(7) for detecting the reference coordinates(8). A controller(5) makes the player view the game image by transmitting the image including a target to the image generator and generally controls entire shooting game machine by changing the contents of the game depending on the operation of the player and advancing the game as judging the hit of the target. The model gun(10) directs a position directed by the player by comprising a CCD(Charge Coupled Device) camera(13), a lens(14), and an infrared transparent filter(15). A coordinates detector(6) comprises a reference coordinates detector and a directed coordinates detector.
Patent KR-20040072437-A (KR)
Inventor: NOH JEONG HO
IPC: H04N7/01
Filed: 2003-02-12
Abstract: PURPOSE: A device for zooming an image is provided to reduce time for selecting and moving a desired part by a cursor key, and to enable a user to select a zooming rate, thereby freely selecting a desired area and the zooming rate. CONSTITUTION: An input image memory(162) consists of at least more than one line memory, and stores input images by line. An area selection controller(161) stores data corresponding to a zooming area among the inputted images in the input image memory(162). A VCR controller(114) controls area information to be zoomed and a zooming rate from the inputted images by controlling the input image memory(162) and the area selection controller(161), and outputs a control signal to the area selection controller(161). A zooming image processor(163) forms a zooming image from the stored images, and outputs the zooming image.
Patent KR-20040074345-A (KR)
Inventor: YANG WON JUN
IPC: G08G1/0968
Filed: 2003-02-17
Abstract: PURPOSE: A telephone call controller of a navigation system is provided to improve the convenience of use by simultaneously performing a telematics and a mobile communication. CONSTITUTION: A CPU(Central Processing Unit)(236) controls the whole system. A memory(239) stores all sorts of information. A main board(227) includes a key controller(230) for controlling all kinds of key signals and an LCD(Liquid Crystal Display) controller(233) for TFT(Thin Film Transistor) LCD display control. The main board is connected to a GPS(Global Positioning System)(218) receiving a GPS signal, a CD(Compact Disk) deck(221) for replaying a CD signal, and a gyro(224). The GPS receives the signal through an antenna(212). The main board is connected to a CDMA(Code Division Multiple Access)(215), which is a communication module for a telematics service, and an antenna(209). The main board is connected to a TV(TeleVision) module(272) for receiving a TV signal. The main board is connected to a TFT LCD(200) and a front board(203). The main board is connected to an audio board(242) for processing all sorts of audio signals. The audio board includes a switch(245) for switching an output signal.
Patent KR-20040078224-A (KR)
Inventor: JI YONG SIK
IPC: H01L21/56
Filed: 2003-03-03
Abstract: PURPOSE: A dispenser is provided to distribute correctly liquefied materials by maintaining constantly pressure of a tube box and using a piston rod of a pneumatic cylinder for opening and shutting a vertical hole of a valve member. CONSTITUTION: A tube box(11) is filled by liquefied materials. The tube box is connected to an air supply unit through a regulator in order to maintain constantly the pressure of the tube box. An outlet(15) of the tube box is connected to the top end of a vertical hole(23) of a valve member(21). A needle(31) is arranged at the lower end of the vertical hole of the valve member. A piston rod(51) of a pneumatic cylinder(41) is inserted into a horizontal hole(25). The vertical hole of the valve member is opened and shut by an operation of the piston rod.
Patent KR-20040078829-A (KR)
Inventor: JIN SEUNG U
IPC: H01L21/425
Filed: 2003-03-05
Abstract: PURPOSE: A method for fabricating a semiconductor device is provided to increase cell current and reduce tWR fail bit by performing a rapid thermal annealing(RTA) process after a plug is formed. CONSTITUTION: After a gate line is formed on a semiconductor substrate(100), a junction region is formed in the substrate at both sides of the gate line. After an interlayer dielectric is formed on the resultant structure, the interlayer dielectric is selectively removed to form a contact hole exposing the junction region. A plug is formed on the resultant structure. After ions are implanted into the plug, an annealing process is performed on the junction region.
Patent KR-20040080536-A (KR)
Inventor: CHOI YONG GUK
IPC: H01M10/0567
Filed: 2003-03-12
Abstract: PURPOSE: A lithium ion battery and its preparation method are provided, to improve the reversible capacity, charge/discharge cycle property and lifetime by inhibiting the decomposition of solvents and forming a thinner and more uniform passivation layer on a carbon electrode. CONSTITUTION: The method comprises the steps of adding a platinum catalyst to an electrolyte solution, and making a lithium ion battery by using the electrolyte solution. Preferably the platinum catalyst is powder or wire-shaped.
Patent KR-20030078804-A (KR)
Title: 전자 소자 기판의 평탄도 결정 방법 및 이의 제조방법,마스크 블랭크 제조 방법, 전사 마스크 제조 방법, 폴리싱방법, 전자 소자 기판, 마스크 블랭크, 전사 마스크 및폴리싱 장치
IPC: B24B37/30
Filed: 2003-03-29
Abstract: 기판의 평탄도는 기판에 형성된 박막의 막 응력으로부터 기인한 평탄도의 변화를 예견함으로써 마스크 블랭크의 소망의 평탄도를 달성하도록 결정된다. 평탄도는 측정 평탄도로서 기판의 평탄도를 측정하고, 측정 평탄도를 참고로 로드 타입을 선택하고, 로드 타입에 의해 지정된 압력 부재하에서 기판을 폴리싱함으로써 조정된다. 기판의 주요면은 0.㎛ 초과 0.25㎛ 이하의 평탄도를 가진다. 폴리싱 장치는 회전가능한 표면 테이블, 여기에 형성된 폴리싱 패드, 연마재를 폴리싱 패드에 공급하기 위한 연마재 공급 수단, 기판 유지 수단과 그리고 기판을 가압하는 기판 가압 수단을 포함한다. 기판 가압 수단은 기판 표면의 다수의 나누어진 영역을 개별적으로 바람직하게 가압하기 위한 다수의 가압 수단을 포함한다.
Patent KR-20040087677-A (KR)
Inventor: CHOI GI CHEOL
IPC: F04B39/00
Filed: 2003-04-07
Abstract: PURPOSE: A reciprocating compressor is provided to increase a suction pressure of refrigerant gas by provisionally compressing the refrigerant gas in a semi-hermetic space and completely compressing the refrigerant gas in a compression chamber of a cylinder, thereby improving the cooling capacity of a compressor. CONSTITUTION: An inner stator(32) and an outer stator are formed by accumulating a plurality of stator cores, wherein the inner stator and the outer stator are separated from each other at a predetermined gap, and a winding coil is installed at the inner stator or outer stator. A mover reciprocates in a straight line by arranging a magnet at the gap between the inner stator and the outer stator. A piston(42) is combined with one end of the mover and is slidably inserted into a cylinder fixed at the inside of the inner stator to reciprocate in a straight line together with the mover. A suction passage is formed in the center of the piston to be communicated with a compression chamber of the cylinder. A plurality of gas discharge holes(42c) are formed at a peripheral surface of the piston in a radius direction to be communicated with the suction passage.