baber/WOPTO huggingface dataset:
Patent KR-20010028961-A (KR)
Inventor: LEE SU YEONG
IPC: C02F3/34
Filed: 1999-09-28
Abstract: PURPOSE: Provided are a method and an apparatus for biologically removing iron and manganese from tap water source. Therefore, iron and manganese included in tap water source can be economically and effectively removed by maximizing utility of microorganisms oxidizing iron and manganese and adsorbing them. CONSTITUTION: The apparatus consists of: i) an aeration tank(2); ii) a first filtering tank(4) filled with sand; iii) a second filtering tank(5) filled with activated carbon; and/or iv) a reacting/settling tank(3). The method comprises: (a) aerating tap water source(1) containing iron and manganese; (b) reacting oxides of the aerated water(6) in case of high concentration iron or short aeration time and settling the product; (c) filtering the supernatant liquid(8) of step (b) in the first filtering tank(4); and (d) filtering the filtered water(11) of step (c) in the second filtering tank(5). In the first and the second filtering tanks(4,5), microorganisms oxidizing iron and manganese and adsorbing them are cultured in large quantities. The two steps (c) and (d), in a downstream system, are progressed in the supply of dissolved oxygen of 0.5mg/L or more and are backwashed in a fixed period.
Patent KR-20010037127-A (KR)
Inventor: CHOI YOUNG HEE
IPC: A61B5/00
Filed: 1999-10-14
Abstract: PURPOSE: A method and system for curing a mental disease using virtual reality technology is provided to obtain the virtual reality without the operation of a high performance computer by using an image base rendering technology. CONSTITUTION: A view movement detecting means(101) detects the view of a mental disease patient(100) according to the movement of a head of the patient. A position recognizing means(102) operates the position of the view from an output signal of the view movement detecting means(101). A central operating device(103) outputs an image base rendering screen data corresponding to the view coordinate value of the patient(100). The image base rendering technology comprises a panorama technology for realizing the virtual reality in a space and an object technology for realizing the virtual reality.
Patent KR-20000023924-A (KR)
Inventor: LEE KYUNG HO
IPC: H01R31/06
Filed: 1999-10-22
Abstract: PURPOSE: Lead frames are provided to prevent lead frames from bending or damaging to prolong a connector life expectancy despite of an application of a strong force to the lead frame by forming the lead frames in a reversed L shape. CONSTITUTION: Lead frames(13) are formed on a rear end of a connector(11) to be electrically and mechanically connected to plural connection terminals(12) and a board(10). The lead frames(13) are formed in a reversed L shape. One connection portion(14) of the lead frames(13) is connected to the plural connection terminals(12) and an extension portion(15) is downwardly bent in a vertical direction and connected to the board(10). The extension portion(15) is extended from the connection portion(14). A housing(16) is provided to prevent the lead frames from bending(13).
Patent KR-20000035603-A (KR)
Inventor: WAISE EDWIN
IPC: F02F3/26
Filed: 1999-11-22
Abstract: PURPOSE: An automatic internal combustion engine is provided to reliably ignite and burn a mixture by generating a fine whirlpool of air/fuel mixture inside an area of igniting plug. CONSTITUTION: An igniting chamber(1) is limited by a piston(3) accepted inside a cylinder(2) and by a cylinder head to accept two inlets(4), one outlet(5), two igniting plugs(6) and an injector of fuel(7). Two concave parts(9,10) are formed inside the piston(3) and are arranged with elevated parts(11,12) and facing backs(13,14) between inclined roof surfaces(15,16) of cylinder head. The igniting plugs(6) are projected to an outer area of concave parts(9,10) from the cylinder head between the inlet(4) and the outlet(5). Two concave parts(9,10) generates a warm current in a fuel jet jetted in a direction of igniting plug(6). Thereby a uniform mixture needed to the ignition is formed around the igniting plug(6).
Patent KR-20010053868-A (KR)
Inventor: KIM JONG HOE
IPC: G06F15/16
Filed: 1999-12-02
Abstract: PURPOSE: The device for linking DB in the intelligent network is provided to minimize the alteration of a linkage module, a development period, and the data discord by separating the linkage module of the IN(Intelligent Network) DB server into a part dependent on the IN service and into a part dependent on the network. CONSTITUTION: The device comprises a network dependent part(30) and an IN service dependent part(40). When the alteration of the member data happens to the integrated DB server, the data is transferred to a transmission part(31) via the linkage module of the integrated DB server. After storing the data to a reception part(32), the transmission part writes an identifier and time of each event on the reception list and notifies to a distribution part(41) of the IN service dependent part. After receiving the notice, reading the data from the reception part, and analyzing the data, the distribution part delivers the data to an error detection part(42) of every IN service. After checking if the data has an error or not, the error detection part returns the error or outputs in order to store the data to the IN DB server. If the data alteration happens to the IN DB server, the process runs in the reverse order.
Patent KR-20010054389-A (KR)
Title: Running machine
Inventor: SONG HUI YUNG
IPC: A63B22/00
Filed: 1999-12-06
Abstract: PURPOSE: Provided is a running machine which receives image, music or other ambient surroundings from recording media in the midst of exercise to represent so that it maximizes exercise efficiency. CONSTITUTION: The running machine comprises the parts of: an input tool which installs exercise mode and exercise surroundings; a reproduction tool which reads various information recorded from specific record media(10); a central processing and control tool(11) which analyzes information stored in the record media, creates exercise mode and surroundings and checks physical state by exercise; a motor driving tool(12) which adjusts rotation speed of a DC motor(M1) in a rolling board and slide angle of the rolling board; and a display tool which displays various information to inform many information about exercise and physical state by exercise.
Patent KR-20010055526-A (KR)
Inventor: KIM HONG IL
IPC: H01L27/115
Filed: 1999-12-10
Abstract: PURPOSE: A method for etching gate of non-volatile memory device is provided to prevent an inferiority due to a residue of electric conduction layer a degradation of a device by, preventing generation of fitting on a surface of a substrate while realizing a vertical profile of a gate, and minimizing the loss of a field oxide layer. CONSTITUTION: A field oxide layer(101) is formed on a semiconductor substrate(100) to separate the semiconductor substrate(100) into to an active area and a field area. A tunnel oxide layer(102), a floating gate layer(104), interlayer dielectric layer(106), a control gate layer(110), and a capping layer(112) are sequentially formed on the substrate(100). A photoresist film pattern(114) is formed on the top of the capping layer(112). The photoresist film pattern(114) is used as a mask to etch the capping layer(112). The photoresist film pattern(114) is used as the mask to sequentially etch the control gate layer(110), the interlayer dielectric layer(106) and the floating gate layer(104). The floating gate layer(104) is etched in an oxygen-system gas atmosphere.
Patent KR-20010065023-A (KR)
Inventor: SON YOUNG SUCK
IPC: A43C7/00
Filed: 1999-12-20
Abstract: PURPOSE: A device for controlling shoelaces is provided; thereby, one can adjust easily the ribbon knot and the length of shoelaces with it. CONSTITUTION: A device for controlling shoelaces comprises the parts of an inner structure, outer structure, and a spring. The inner structure has holes(2) where to insert shoelaces, a push button(7) supported by the spring, and a room(4) where to insert the spring. The outer structure is composed of a structure for tying a ribbon, holes where to insert shoelaces and to fix, and a room where to insert the spring.
Patent KR-20000057081-A (KR)
Inventor: JU KI HWAN
IPC: A61M15/02
Filed: 1999-12-21
Abstract: PURPOSE: A method for producing anionic air having functional physiological activity, which is able to keep the homeostasis of the human body and has deodorizing effect, generated by using choral is provided. CONSTITUTION: A method comprises steps of: (i) preparing choral calcium carbonate(2) by sintering weathered choral powder(1) at a temperature of 100-1,000°C with a sintering means(1); (ii) dissociating the calcium carbonate(2) generated from the sintering means(1) into calcium ion(Ca¬2+)(5) and carbonate ion(CO3¬2-)(6) by using a dissociating means(3); and (iii) reacting the carbonate ion(6) with moisture(H2O)(6) in the air in a moisture reacting means(7) to obtain alkali physiological active ion of bicarbonate ion(HCO3¬-)(8) and physiological active anion(l) of hydroxide ion(OH¬-)(9).
Patent KR-20010061682-A (KR)
Inventor: SONG GI TAE
IPC: G01M3/00
Filed: 1999-12-28
Abstract: PURPOSE: A tester of a safety valve for a pressurizer is provided to prevent generation of oxidation-corrode material and to eliminate fine dust in a pressurized/bent pipe of a chamber. CONSTITUTION: A gasket contact surface(6) and a chamber(7) are formed in the internal center of a flange form body(1). An edge(2) of a socket(12) has a curve, and a pressurized/bent removable union(5) is connected to the socket. A contact portion(4) of a hydraulic wrench repulsive plate is machined perpendicularly to have torsion and exact tightening pressure of a wrench by a repulsive force of the high-pressure hydraulic wrench. A safety valve is mounted on the body. Then the removable pressurized/bent union assay is fixed to the socket of the body. The safety valve is tested after pressurized at test pressure for seat leakage or at set pressure by using an additional booster. Therefore, gasket leakage is prevented and fine particles causing leakage are eliminated.
Patent KR-20010058828-A (KR)
Title: Method for forming pad region and fuse region of semiconductor
Inventor: CHO HYEONG CHEOL
IPC: H01L27/04
Filed: 1999-12-30
Abstract: PURPOSE: A method for forming a pad region and a fuse region of a semiconductor is provided to prevent a damage of a polysilicon by performing simultaneously a final etching process for a pad region and a fuse region. CONSTITUTION: A fuse is formed on a fuse region of a semiconductor wafer. The first metal line(13) and the second metal line(15) are formed on a pad region and the fuse region through an insulating layer(12). A TEOS layer(16) and a nitride layer(17) are formed on the second metal line(15). A mask is formed on the nitride layer(17) in order to expose the second metal line(15) of the pad region. The nitride layer(17) of the pad region is etched. The second metal line(15) of the pad region is exposed. The nitride layer(17) and the TEOS layer(16) of the pad region and the nitride layer(17) and the TEOS layer(16) of the fuse region are etched simultaneously.
Patent KR-20010058907-A (KR)
Inventor: CHO WAN HYEONG
IPC: B60S1/50
Filed: 1999-12-30
Abstract: PURPOSE: A foreign material discharger of a washer in reservoir tank is provided to install an install groove on a lower end of a float displaying filled state of washer and to automatically discharge foreign materials in the washer reservoir with load of the float by installing an actuating rod connected to an elastic spring. CONSTITUTION: A foreign material discharger comprises an accumulation chamber(32) of a cylinder shape piling foreign material(30); a washer reservoir(10) forming a discharge hole(38) on a side of the accumulation chamber; a body(44) forming an install groove(42); a float(40) having a frame unit(46) of a hexahedron shape penetrated by plural grooves letting in washer(14); an actuating rod(34) of a cylinder shape connected to a lower end of the accumulation chamber with an elastic spring. The actuating rod is mounted on the install groove of the float. A lower face of the washer reservoir is slantingly formed toward the accumulation chamber. Thereby, the foreign material is discharged through the discharge hole. Moreover, the foreign material remaining in as slurry is let in the accumulation chamber(32) through the groove penetrating the frame of the float and discharged via the discharge hole.
Patent KR-20010058921-A (KR)
Inventor: KIM SEOK JUN
IPC: B22F3/00
Filed: 1999-12-30
Abstract: PURPOSE: A production method of a camshaft for a vehicle is provided to minimize an interval between cams. CONSTITUTION: A mold(10) having a hollow portion and a cam shape is prepared. A powder(20) such as a carbon steel, a chrome, a molybdenum, a nickel and so on is filled in the mold. A cam(30) of double cam structure is formed by pressurizing the powder(20) in the mold. A camshaft(50) is produced by inserting many cams(30) in a pipe(40) and processing appropriately. Thereby, a distance between the cams is minimized. Therefore, the efficiency of an engine is improved and the engine is compacted.
Patent KR-20000068436-A (KR)
Title: 디아민 유도체 및 이를 함유하는 의약
IPC: C07D215/22
Filed: 1998-07-07
Abstract: 본 발명은 하기 일반식(1) 
     
       
     
     [R 1 은 H, OH, 아랄킬옥시기 또는 할로겐 원자를 나타내고, R 2 는 H 또는 저급 알킬기를 나타내고, A는 -C(R 3 )=CH-, -CH=N-, -N(R 4 )- (여기서, R 3 는 H 또는 OH, R 4 는 저급 알킬기 또는 알콕시알킬기), -O-, 또는 -S-를 나타내고, B는 단결합, -C(R 5 )(R 6 )-(CH 2 ) k - (R 5 및  R 6 는 H 또는 저급 알킬기를 나타내고, k는 0∼2의 수), -S(O)qCH(R 7 )- 또는 -CH=CH-를 나타내고, E는 단결합 또는 -(CH 2 ) 3 -를 나타내고, W 및 Y는 -CH 2 - 또는 -CO-를 나타내고, Z는 O 또는 S를 나타내고, m은 2 또는 3, n은 1∼4의 수를 나타낸다. 단, B가 단결합일 때, E는 -(CH 2 ) 3 -이고, B가 단결합 이외의 기일 때, E는 단결합이다.] 
     로 표시되는 디아민 유도체 또는 그의 염에 관한 것이다. 항로이코트리엔 작용과 항히스타민 작용을 병유함과 동시에 뇌내 이행성이 낮고, 천식 예방치료체 등의 의약으로서 유용하다.
Patent KR-20000036003-A (KR)
Inventor: ECKARDT BERND
IPC: G21C1/00
Filed: 1997-08-27
Abstract: PURPOSE: A device is provided to initiate a hydrogem oxygen reaction in an initial igniter, which can analyse hydrogen passively and increase stability. CONSTITUTION: According to the invention, a minor part of the total available catalytic surface,preferably less than 5 % of the surface, is permanently held at an increased temperature level with respect to the environment by energy supplied by a heating device (6, 8, 38, 42, 44). This part of the surface acts as an initial igniter.
Patent KR-20000052984-A (KR)
Inventor: ERIKSSON HANS
IPC: H03F1/30
Filed: 1997-11-06
Abstract: PURPOSE: An arrangement for reducing and stabilizing amplification of darlington-coupled output stage is provided to stabilize the idle current and the bandwidth of a known Darlington-coupled output stage comprising bipolar transistors. CONSTITUTION: An output stage comprises a transistor(Q1) whose base is connected to an input terminal(IN) and whose collector is connected to an output terminal(OUT). The collector of the transistor (Q1) can be connected to another supply voltage terminal or ground. The emitter of the transistor Q1 is connected to the base of a transistor(Q2). The collector of the transistor(Q2) is connected to the output terminal(OUT), while its emitter is connected to the supply voltage terminal(VBB). A transistor(Q3) is connected with its collector to the input terminal(IN), with its emitter to the supply voltage terminal(VBB) via a resistor(R1), and with its base to the interconnection point between the emitter of the transistor(Q1) and the base of the transistor(Q2). The amplification is input current dependent and can be made arbitrarily low and stable by being essentially dependent on said ratio between the emitter areas for low input currents.
Patent KR-20000069052-A (KR)
Title: 셀룰러 비트열과 무선파형 사이를 맵핑하는 방법 및 장치
IPC: H04L1/00
Filed: 1997-11-24
Abstract: 셀룰러 비트열(10)을 유선 모뎀 파형으로 맵핑하는 방법 및 장치는 공개된다. 수신된 셀룰러 비트열(10)은 상기 셀룰러 비트열(10)의 각 비트 프레임내에 클래스(I) 언어 비트(12)를 디코딩하기 위하여 나선식 디코더(34)에 적용된다. 상기 디코더 언어 비트(16)는 상기 디코딩 비트가 오는 비트 프레임에 부착되고, 40 비트 프레임 표시기(21)는 각 비트 프레임(22)에 부착된다. 이렇게 수정된 비트 프레임은 20㎳ 간격에서 유선 모뎀(18)을 송신되어 19.2KB/S 비트속도로 수행한다. 상기 유선 모뎀(38)은 파형상에 신호를 맵핑하여 그 신호를 PSTN 네트워크(37)로 송신한다.
Patent KR-20000070952-A (KR)
Title: 미소 질량유동 제어장치 및 방법
IPC: G05D7/06
Filed: 1998-02-11
Abstract: 미소질량 유동제어기(10)는 시간의 주기동안에 음속초크형 유동제한부를 통하여 가스의 질량유량을 유동이 없는 것과 최대유량사이의 어떤유량으로 설정 또는 변화시키기 위하여 음속초크유동제한부(28)를 시간모듈식 연속으로 반복적으로 개폐시키기 위하여 진동밸브(26)를 구비한 음속초크형 유동제한부를 가지고 있다. 바이오모르프 피에조전기 액추에이터(40)는 스퍼터된  절연층(78)으로 피복되고 스테인레스 강 또는 다른 금속크래딩층(80)내에 둘러싸여 진다. 액추에이터(40)상의 폐쇄부재(46)는 접착제(86)가 경화될 때까지 접착제(86)의 반죽내의 폐쇄부재를 밸브시트(70)에 대해 가압하도록 액추에이터(40)를 작동시킴으로써 밸브시트(70)에 등록시킨다.
Patent KR-20000071160-A (KR)
IPC: A61P25/30
Filed: 1998-01-13
Abstract: 본원에는 도파민 자가수용체 효능제로서 정신분열증, 파킨스 질환, 투렛 증후군(Tourette's syndrome), 알콜 중독증 및 약물 중독증을 치료하는데 유용한 화학식 I의 화합물 또는 약제학적으로 허용되는 이의 염이 기술되어 있다. 
     화학식 I 
     
       
     
     상기 화학식에서, 
     R 1 은 수소 또는 C 1 -C 6 알킬이고, 
     R 2 는 수소, 직쇄 또는 측쇄 C 1 -C 10 알킬, 사이클로헥실메틸 및 -(CH 2 ) m Ar(여기서, Ar은 각각 독립적으로 C 1 -C 6 알킬, 할로겐, C 1 -C 6 알콕사이드 및 트리플루오로메틸로부터 선택된 1 또는 2개의 치환체로 임의로 치환된 페닐, 나프틸, 티에닐, 푸라닐 또는 피리디닐이고, m은 1 내지 5이다)로부터 선택되거나, 
     NR 1 R 2 는 1,2,3,4-테트라하이드로퀴놀린-1-일 또는 1,2,3,4-테트라하이드로이소퀴놀린-2-일이며, 
     n은 1 또는 2이고, 
     R 3 은 수소 또는 C 1 -C 6 알킬이며, 
     Y는 할로겐, C 1 -C 6 알킬 또는 C 1 -C 6 알콕시이다.
Patent KR-20010020214-A (KR)
Title: 안테나 시스템
IPC: H01Q23/00
Filed: 1998-04-17
Abstract: 본 발명은 이동 통신 설비에 사용하기 적합한 안테나 시스템(10)에 관한 것이다. 안테나 시스템(10)은 송신 어레이(26)와 수신 어레이(24)를 나란한 형상으로 포함한다. 한 시시예에서, 어레이 각각에 사용된 복사 부재는 공기 부하 마이크로스트립 패치 안테나로 구성된다. 각 어레이에서의 부재는 선형으로 배열되고 다극성이 이용되어 송수신 어레이가 근접하여 함께 이격될 수 있다.
Patent KR-20010012442-A (KR)
Title: 지리적으로 분산된 데이터의 집중화된 수집 방법 및 그 장치
IPC: G16H10/20
Filed: 1998-05-12
Abstract: 자바(JAVA, 등록상표임)같은 대화형 프로그래밍 언어와 월드와이드웹을 포함하는 인터넷과 같은 광대역 네트워크를 이용한 시스템을 사용하여 지리적으로 분산된 데이터의 집중화된 수집이 이루어진다.  데이터 베이스에서의 저장에 앞서 데이터에 대한 1회 또는 그 이상의 인증이 제공된다.
Patent KR-20010014428-A (KR)
Title: 신체 적용되는 일회용 흡수제품을 위한 핸들링 보조물의사용
IPC: A61F13/472
Filed: 1998-06-29
Abstract: 본 발명은 신체 대향면, 가멘트 대향면, 종방향 대칭면, 전방 말단 가장자리 및 후방 말단 가장자리를 가지며 액체 투과성 상면시이트, 상면시이트에 연결된 배면시이트 및 상면시이트와 배면시이트를 매개하는 흡수 코어를 포함하는 일회용 흡수제품을 잡고 사용자의 신체에 직접 적용하기 위한 수단의 사용을 제공한다.  이 수단의 사용은, 수단 내에 적어도 하나의 손가락을 삽입하고, 제품을 신체 위에 직접적으로 위치하도록 조작하고, 바람직하게는 신체에 적용하면서 제품을 3차원 형태로 만드는 단계를 포함한다.
Patent KR-20010068655-A (KR)
Title: Detergent composition of laundary machine
Inventor: CHO YUN JIN
IPC: C11D7/18
Filed: 2000-01-07
Abstract: PURPOSE: A laundry machine cleaner composition is provided which has better cleanability and sterilizability than the conventional cleaner compositions and excellently prevents the removed contaminants from re-adhering thereto. CONSTITUTION: The laundry machine cleaner composition comprises: (i) 50-90 wt.% of sodium percarbonate; (ii) 1-10 wt.% of tetra acetyl ethylene diamine; and (iii) 4-30 wt.% of alpha olefin sodium sulfonate. The laundry machine cleaner composition further contains sodium carbonate.
Patent KR-20010069119-A (KR)
Title: A method for publishing, delivering and using a point exchange ticket in the computer network
Inventor: HONG YONG HEE
IPC: H04L12/14
Filed: 2000-01-12
Abstract: PURPOSE: A method for issuing, transferring and using point merchandise coupon using computer network is provided to complete a transfer function of a point as cyber money by allowing a point possessor to issue the point in form of a merchandise coupon and transfer or give the merchandise coupon to another person. CONSTITUTION: A member accesses a web server of merchandise coupon service and logins by inputting ID and password(S21). When "point merchandise coupon issuing request" option is selected(S22), a point value to be made to the merchandise coupon, format of the merchandise coupon, method for delivering the merchandise coupon, and object and location to which the merchandise coupon will be delivered are inputted(S23). By previewing(S24), it is conformed that the merchandise coupon has been well made(S25). If so, the point merchandise coupon is issued and a serial number of the merchandise coupon is given(S26). The issuing merchandise coupon is registered by storing information about the issued merchandise coupon in a merchandise coupon database(S27). The merchandise coupon is transferred to a designated object(S28).
Patent KR-20010076626-A (KR)
Title: Automatic recleanable water purifier system with air drop
Inventor: LIM TAEK JAE
IPC: C02F1/28
Filed: 2000-01-27
Abstract: PURPOSE: An automatic air bubble backwash water purification system is provided to improve washing efficiency and make it possible to identify operation of equipments by washing filter physically and chemically with compressed air and using transparent air storage tank. CONSTITUTION: Several filter lines(A,B) are linked to a water inflow tube(1). A first valve unit guides provided water to one of the filter lines(A,B). A second valve unit outflows water purified by the filter line and guides water to another filter line. An air bubble providing unit(40) provides air to washing water counterflowing to the filter lines(A,B). The air bubble providing unit(40) comprises air providing tubes(41,42), an air pump(43) and check valves(41a,42a).
Patent KR-20010076835-A (KR)
Title: Auto white balancing device and method of digital camera
Inventor: YOO DAE YEONG
IPC: H04N5/235
Filed: 2000-01-28
Abstract: PURPOSE: An auto white balance device of digital camera and a method of the same are provided to compensate for a color effectively by generating a suitable white balance coefficient fitting for a varying light source if only the light source varies. CONSTITUTION: A solid imaging element transforms incident video information of light energy form into an analog electric signal. An A/D(analog/digital) converting unit converts the analog electric signal into a digital signal. A video signal process unit generates a digital video signal and color data including a luminance signal and a chromaticity signal from the digital signal, divides a screen into several windows and seeks for an addition of the luminance signal and a color difference signal of each window. A video encoder encodes the digital video signal into an appointed video format. An auto white balance control unit(210) is enabled by a coefficient generation signal(214) and generates an inner white coefficient(216) from the color data. An auto white balance prepositional control unit(212) compares a value variation in a current frame with a color difference signal value of a pixel selected in a former frame to detect a variation of light source, and enables the auto white balance control unit(210) to generate a new auto white balance coefficient(218) in case the variation of light source is detected.
Patent KR-20000053659-A (KR)
Inventor: NUMATAHIDEHIKO
IPC: F02M35/16
Filed: 2000-01-28
Abstract: PURPOSE: A bicycle mounted with internal combustion engine is provided to accomplish improvements allowing a reduced intake resistance while arranging an air intake passage in a straight line by preventing an air cleaner from being protruded toward the bicycle body utilizing a dead space behind a seat post. CONSTITUTION: A bicycle comprising an approximately V-shaped vehicle frame(2) constituted by a main frame and a seat post(5) extended upwardly, the seat post(5) being arranged in a rear portion of the main frame which is extended from a head pipe(3) downwardly to an inclined rear portion, and an internal combustion engine(20) installed beneath the vehicle frame(2), the bicycle further comprising an air cleaner(30) between the seat post(5) and a rear wheel(9).