baber/WOPTO huggingface dataset:
Patent KR-20110111388-A (KR)
Inventor: COHOON BRISTER KRISTEN
IPC: C08G63/78
Filed: 2009-12-21
Abstract: 방법은 폴리비닐 클로라이드, 폴리비닐리덴 클로라이드, 폴리아미드, 폴리유산, 및 이들의 조합으로 이루어진 군으로부터 선택되는 적어도 하나의 제2 고분자의 존재 하에서, 폴리에틸렌 테레프탈레이트를 포함하는 제1 고분자를 1,4-부탄디올로 용융 혼합물을 제조하도록 해중합하는 단계; 및 개질된 폴리부틸렌 테레프탈레이트 코폴리머를 형성하는데 충분한 조건 하에서 상기 용융 혼합물을 중합하는 단계를 포함한다.  상기 개질된 PBT는 (a) 적어도 하나의 폴리에틸렌 테레프탈레이트 성분 잔기, 및 (b) (i) 폴리비닐 클로라이드, 폴리비닐리덴 클로라이드, 폴리아미드, 폴리유산, 및 이들의 조합으로 이루어진 군으로부터 선택되는 적어도 하나의 제2 폴리머; (ii) 상기 제2 폴리머로부터 유도되는 상기 적어도 하나의 잔기; 및 이들의 조합으로 이루어진 군으로부터 선택되는 구성을 포함한다.
Patent KR-20120000047-A (KR)
Inventor: GOVIL AMIT PRAKASH
IPC: A61K35/32
Filed: 2009-12-13
Abstract: 본 발명은 생리활성 이식편 및 이의 제조 방법을 개시한다. 일 실시양태에서, 골 물질을 기증자로부터 수거한다. 수거된 골 물질을 용해제에 노출시키고, 용해제는 수거된 골 물질의 세포 물질로부터 성장 인자 및 생리활성 물질을 방출시키도록 구성된다. 이후, 수거된 골 물질을 세정제로 세정한다. 수거된 골 물질의 pH를 실질적으로 중화할 수 있다.
Patent KR-20110124290-A (KR)
Inventor: YOSHIKAWA NOBUHIRO
IPC: B23K26/21
Filed: 2010-02-24
Abstract: 레이저 용접 장치(100)에는 아암을 구비하는 다축 로봇(110) 및 다축 로봇의 아암의 첨단에 부착된 스캐너(120)가 제공된다.  스캐너(120)는 레이저 빔을 작업편에 조사하는 광학계를 포함한다.  스캐너(120)는 레이저 빔의 광축과 광학계의 고정 요소(131) 사이의 교점과 일치하는 좌표계의 원점을 갖는 사전설정 좌표계를 포함한다.
Patent KR-20110132562-A (KR)
Inventor: JENKINS COLIN ROBERT
IPC: B81B3/00
Filed: 2010-02-12
Abstract: 마이크로-전기-기계 시스템(MEMS) 트랜스듀서는 절연성 물질 층을 포함하고, 절연성 물질 층 내에는 전극이 형성되어 있다.  절연성 물질 층의 한 영역은 사용시에 절연선 물질 층으로부터 원하지 않는 전하를 제거하는 누설 경로를 제공하도록 적응된다.
Patent KR-20110128183-A (KR)
Title: Polymer fiber, its use and process for its manufacture
Inventor: KNACK INGO
IPC: D06M10/00
Filed: 2010-03-12
Abstract: The present invention relates to a novel polymer fiber obtainable by melt-spinning of a polymer, the use of the fiber and a process for the manufacture of the fiber.
Patent KR-20110129972-A (KR)
Inventor: JUESTEL THOMAS
IPC: H01L33/00
Filed: 2010-03-16
Abstract: 본 발명은 높은 연색성을 갖는 발광 장치(1)에 관한 것으로서, 이 발광 장치는 청색 광 및/또는 자외선 광(10)을 적색 광 및/또는 황색 및/또는 녹색 광으로 파장 변환하기 위한 발광 매체를 갖는 파장 변환 부재(2), 및 상기 발광 매체를 펌핑하도록 구성된 청색 광(10) 및/또는 자외선 광을 방출하는 광원(3)을 포함하고, 상기 발광 매체는 본질적으로, Ce 3   +  이온들로 도핑된 고체 상태 호스트 물질의 주 위상을 갖는다.  본 발명에 따르면, 호스트 물질은 추가의 희토류 물질 Ln의 이온들을 포함하고, Ce 3   +  이온들 상에서의 5d-4f 방출의 방출 에너지가 추가의 희토류 물질 Ln의 상위 4f n  상태로의 흡수 에너지보다 에너지적으로 더 높도록 선택되고, 파장 변환된 광의 광 방출은 추가의 희토류 물질의 이온들 내에서의 원자 내 4f n -4f n  천이에 의해 유발된다.  본 발명은 또한 발광 장치, 및 대응하는 발광 매체를 포함하는 대응하는 조명 시스템에 관한 것이다.
Patent KR-20120015314-A (KR)
Inventor: FERREN BRAN
IPC: G03B3/00
Filed: 2009-12-30
Abstract: 적어도 하나의 카메라를 포함하는 핸드헬드 디바이스가 다양한 기능들을 수행할 수 있다.  일부 실시예들에서, 상이한 고정 초점 거리들을 갖는 2개의 이상의 카메라 렌즈를 이용하여 촬영된 디지털 이미지들을 결합하여, 고해상도 광학 줌을 에뮬레이트할 수 있으며, 디바이스로 하여금 3D 응용들을 수행하게 할 수도 있다.  다른 실시예들에서, 카메라를 포함하는 디바이스가 바코드 판독기로서 동작할 수 있으며, 바코드를 다른 디바이스들로 무선 전송하거나 시각적으로 표시할 수 있다.  이동 가능한 광학 기구들은 동일 카메라가 먼 물체 상에 또는 클로즈업 바코드 상에 초점을 맞추게 할 수 있다.
Patent KR-20120013369-A (KR)
Inventor: ORTINS MARC PHILIP
IPC: A61C17/00
Filed: 2010-05-06
Abstract: 개인 위생 제품 및 사용자를 돕기 위한 디스플레이를 구비하는 개인 케어 시스템이 기술된다.  개인 케어 시스템은 개인 케어 제품(예컨대, 전동 칫솔), 개인 케어 제품과 데이터 통신하는 인터랙티브 디스플레이를 포함할 수 있다.  디스플레이는 개인 케어 요법의 복수의 특성과 관련된 정보를 사용자에게 제공한다.  디스플레이는 네트워크와 데이터 통신하고 네트워크로부터 정보를 수신하도록 작동가능하며, 디스플레이는 네트워크로부터 수신된 정보를 표시하기 위해 하나 이상의 애플리케이션을 실행시키도록 작동가능하다.
Patent KR-20120022902-A (KR)
Inventor: TERADA MASAYOSHI
IPC: C09D183/04
Filed: 2010-04-06
Abstract: 본 발명의 광 디바이스는 지지체 위에 실장된 발광 소자 또는 수광 소자와, 소자를 하이드로실릴화 반응 경화성 실리콘 조성물로 밀봉시켜 상기 지지체 위에 단일 제품으로 일체화된 실리콘 경화물을 포함하며, 실리콘 경화물의 표면은 한 분자에 3개 이상의 규소-결합된 수소원자를 갖는 오가노폴리실록산으로 처리되었음을 특징으로 한다.  광 디바이스는 지지체 위에 실장된 발광 소자 또는 수광 소자를 밀봉하고 이에 의해 지지체 위에 단일 제품으로 일체화된 실리콘 경화물의 표면의 점착성 억제로 인하여 분진 및 먼지의 부착에 대해 내성이 있다.
Patent KR-20110138412-A (KR)
Inventor: HARDING FIONA A
IPC: A61P37/00
Filed: 2010-04-16
Abstract: 본 발명은 종양 괴사 인자 알파("TNF-α")에 대한 항체 및 이러한 항체의, 예를 들어 TNF-α의 활성 및/또는 과생성과 연관된 질환 치료를 위한 용도에 관한 것이다.
Patent KR-20120023027-A (KR)
Inventor: MIWA SHINKICHI
IPC: C03B17/06
Filed: 2010-05-07
Abstract: 본 발명의 유리 기판은 제 1 표면과 제 2 표면을 갖는 유리 기판에 있어서, 제 1 표면의 평균 표면 조도(Ra)가 0.2nm 이하이고, 적어도 제 2 표면이 대기압 플라즈마 프로세스로 화학 처리되고, 또한 평균 표면 조도(Ra)가 0.3?1.5nm인 것을 특징으로 한다.
Patent KR-20120099571-A (KR)
Inventor: SHUKUYA REI
IPC: B23Q1/62
Filed: 2010-06-15
Abstract: 테이블(15)을 X축 방향 및 Y축 방향으로 자유롭게 이동시키는 2 차원 이동 기구(4)에 있어서, 간단한 구성이고 염가이고 소형화가 용이한 2 차원 이동 기구를 제공하기 위한 것이다.  2 차원 이동 기구에 있어서, X축용 슬라이더(7) 및 Y축용 슬라이더(10)에 각각 설치된 각 락(27, 47)의 양단 근방의 이빨에 동시에 서로 맞물리는 각 한 벌의 피니언(33, 34, 53, 54)을 배치한다.  상기 각 한 벌의 피니언은 각 모터에 구동되어 동기 회전하는 구성으로 한다.
Patent KR-20120027423-A (KR)
Inventor: BERTHOLON ISABELLE
IPC: A61K31/728
Filed: 2010-05-28
Abstract: 본 발명은 필러 또는 보튤리누스 독소; 및 아드레날린 수용체 작용제를 포함하는 주사가능한 조성물에 관한 것으로, 붉어짐, 반상출혈, 멍, 출혈, 홍반, 부종, 괴사, 궤양, 붓기 및/또는 염증을 포함하는 주입에 따른 피부 반응을 약화시키거나, 감소시키거나 또는 피하기 위한 용도에 관한 것이다.
Patent KR-20130080267-A (KR)
Title: Mobile terminal and operation method thereof
Inventor: HWANG IN SU
IPC: G06F3/14
Filed: 2012-01-04
Abstract: PURPOSE: A mobile terminal and an operation method thereof are provided to supply a standby screen having a new graphic user interface. CONSTITUTION: A screen on a touch screen is divided to multiple domain frames. At least one widget information is displayed on the screen of a first area. At least one contact address information is displayed on the screen of a second area. A stand-by screen (200) is formed by displaying at least one menu information on the screen of a third area. The screen of the first area to the third area is separately displayed. [Reference numerals] (AA) Weather; (BB) Calendar; (CC) Time; (DD,LL) Music; (EE,JJ) Gallery; (FF) Call; (GG) Message; (HH) Browser; (II) Camera; (KK) Contact information; (MM) Schedule
Patent KR-20130081339-A (KR)
Inventor: JUNG IN SUN
IPC: A47H23/08
Filed: 2012-01-09
Abstract: PURPOSE: An insulation curtain is provided to use a curtain member with an embedded insulation layer, thereby preventing a draft or cool air from coming in a space through windows. CONSTITUTION: An insulation curtain comprises an insulated curtain member (10) which is installed at a window to be capable of opening or closing; a supporting part (20) which is installed at an upper side of the window; and a connecting part (30) which connects the top end of the insulated curtain member to the supporting member. The insulated curtain member includes an outer cloth and an insulation layer filled with a specific thickness within the outer cloth. The outer cloth of the insulated curtain member is made of a material capable of generating relatively positive electricity through contacts with glasses of the window.
Patent KR-20130081565-A (KR)
Title: Wind power generation in subway
Inventor: KIM JONG CHEOL
IPC: F03D9/00
Filed: 2012-01-09
Abstract: PURPOSE: A subway wind power generator is provided to restrain the generation of turbulence generated when two trains simultaneously run in mutually opposite directions and to guide the direction of wind using multiple wind direction guides, thereby maximizing the rotation of a turbine blade. CONSTITUTION: A subway wind power generator includes a first turbine blade (110), a second turbine blade (120), a generating unit (130), an electricity storage unit (140), a first wind direction guide (150), and a second wind direction guide (160). The second turbine blade is installed at a column (10), and faces the first turbine blade. The generating unit generates electricity with the rotations of the first and the second turbine blade. The electricity storage unit stores the electricity. The first wind direction guide surrounds the first turbine blade, restrains the generation of turbulence generated when one train (1) runs in an A direction and another train (1') runs in a direction (B direction) opposite to the A direction simultaneously with the one train, guides the direction of wind, and then maximizes the rotation of the first turbine blade. The second wind direction guide surrounds the second turbine blade, restrains the generation of the turbulence generated when the one train runs in the A direction and the another train runs in the B direction simultaneously with the one train, guides the direction of the wind, and then maximizes the rotation of the second turbine blade.
Patent KR-20130084106-A (KR)
Title: Apparatus and method for setting a interface in a portable terminal
Inventor: LIM CHAE WHAN
IPC: H04M1/72457
Filed: 2012-01-16
Abstract: PURPOSE: An apparatus and a method for setting up an interface in a portable terminal are provided to set up an interface in a portable terminal without the inconvenience of generating different dedicated software. CONSTITUTION: If a portable terminal is turned on, a control unit (101) confirms whether a subscriber identity module (SIM) is installed in the portable terminal. In case the SIM card is installed, the control unit detects a country code and a mobile operator code included in the SIM card. The control unit executes an interface setup application. The control unit searches for customized producing data corresponding to the detected country code and the mobile operator code of all customized producing data. The control unit installs an interface of the portable terminal through the searched customized producing data. [Reference numerals] (101) Control unit; (103) Display unit; (105) Key input unit; (107) Memory unit; (109) SIM card unit; (111) RF unit; (113) Data processing unit; (115) Audio processing unit
Patent KR-20130085812-A (KR)
Title: Method for user scheduling considering inter-cell interference and wireless mobile communication system
Inventor: JUNG BANG CHUL
IPC: H04W72/12
Filed: 2012-01-20
Abstract: PURPOSE: A user scheduling method considering inter-cell interference and a wireless mobile communication system performing the same are provided to schedule a communication channel between a mobile terminal and a base station by considering interference between adjacent cells. CONSTITUTION: An interference information extraction unit (21) extracts interference information between multiple mobile terminals and base stations of a cell in which the multiple mobile terminals are included and an adjacent cell. A channel state detection unit (22) detects a channel state between the multiple mobile terminals and the base station of the cell in which the multiple mobile terminals are included. A scheduler (23) determines one or more mobile terminals among the multiple mobile channel to form a communication channel based on the extracted interference information and the detected channel state. [Reference numerals] (10) Receiving unit; (21) Interference information extraction unit; (22) Channel state detection unit; (23) Scheduler; (30) Transmitting unit
Patent KR-20130089389-A (KR)
Title: Close renage radio communication system and therof operating method
Inventor: KIM JUNG TAE
IPC: H04W4/80
Filed: 2012-02-02
Abstract: PURPOSE: A local area wireless communication system and an operating method thereof are provided to improve a user experience (UX) in case of exchanging information by using a local area wireless communication. CONSTITUTION: A first terminal (100) and a second terminal (200) connect one or more local area wireless communications between terminals. The first terminal has information in which sharing is set up and transmits the information to the second terminal in case of connecting a local area wireless communication with the second terminal. The second terminal receives the information in which sharing is set up from the first terminal in case of connecting a local area wireless communication with the first terminal. The second terminal processes the received information in which sharing is set up through one or more programs or processes.
Patent KR-20130090664-A (KR)
Title: Method for reinforcing hollow core slab and hollow core slab thereof
Inventor: CHOI MYOUNG SIG
IPC: E04B5/32
Filed: 2012-02-06
Abstract: PURPOSE: A reinforcement method of a hollow slab and a hollow slab thereby are provided to reinforce both ends of a hollow slab using reinforcement metals and topping concrete even if a high load is applied to the hollow slab. CONSTITUTION: A reinforcement method of a hollow slab is as follows. Openings (30) connected to hollow portions (20) are formed on the top surfaces of the ends of a hollow slab (10). Reinforcement metals (40) are arranged inside of the hollow portions through the openings. Topping concrete (50) is placed in the hollow portions through the openings.
Patent KR-20120095302-A (KR)
Title: Pattern forming method, active ray-sensitive or radiation-sensitive resin composition, and resist film
Inventor: YAMAGUCHI SHUHEI
IPC: G03F7/027
Filed: 2012-02-07
Abstract: PURPOSE: A method for forming patterns, an active ray-sensitive or radiation-sensitive resin composition, and a resist film are provided to resolution such as dimension before bridge. CONSTITUTION: A method for forming patterns includes the following: a film is formed based on an active ray-sensitive or radiation-sensitive resin composition; the film is exposed; and the exposed film is developed based on a developer containing an organic solvent to form patterns. The patterns are negative type. The active ray-sensitive or radiation-sensitive resin composition contains a resin and a compound which includes a polymerizable group and generates acid by being irradiated with active rays or radiation rays.
Patent KR-20130091589-A (KR)
Title: A washing machine and a method for manufacturing motor stator of the washing machine
Inventor: MIN BYUNG WOOK
IPC: H02K15/02
Filed: 2012-02-08
Abstract: PURPOSE: A washing machine and a stator of a washing machine driving motor are provided to diversely circulate laundry moving inside a drum by using two drums driven independently. CONSTITUTION: A washing machine includes a tub, a main drum, a sub drum, a hollow outer shaft, an inner shaft, and a driving motor. The tub is arranged inside a body and the main drum is installed inside the tub. The sub drum is installed inside the main drum to be reversely rotated against the main drum. The hollow outer shaft is connected to the main drum. The inner shaft is connected to the sub drum inside the outer shaft. The driving motor is connected to the stator, the inner shaft, an outer rotor circulating outside the stator, the outer shaft, and an inner rotor circulating inside the stator. The stator is integrated with an inner stator facing the inner rotor and an outer stator facing the outer rotor by an insulator (78).
Patent KR-20120093097-A (KR)
Title: Protection module and method for managing the status information in the protection module
Inventor: ONO KIMITOSHI
IPC: H01M10/48
Filed: 2012-02-13
Abstract: PURPOSE: A protection module and a state information maintenance method of the same are provided to obtain state information maintenance of high accuracy by improving reliability of state information of a secondary battery. CONSTITUTION: A protective module(100) connected to between a secondary battery(200), and a load(300) comprises: a protection unit(118) protecting the secondary battery from overcharging/overdischarging by controlling on/off of a switch device connected to between the secondary battery and the load; a recording unit(122) recording critical value information for detecting a state of the secondary battery, and state information of the secondary battery; and a state monitoring unit(117) monitoring the state of the secondary battery. The state monitoring unit sets a plurality of regions saving the state information of the secondary battery in the recording unit, and saves the state information and flag information which shows the newest state information in a region of the plurality of regions.
Patent KR-20120095324-A (KR)
Title: Composition for preventing or treating sepsis or septic shock comprising sirt1 expression inducer
Inventor: HAN MYUNG KWAN
IPC: A61P7/00
Filed: 2012-02-17
Abstract: PURPOSE: A composition containing a material which induced SIRT1 expression for preventing or treating sepsis or septic shock is provided to reduce pro-inflammatory cytokine and to increase anti-inflammatory cytokine. CONSTITUTION: A pharmaceutical composition for preventing or treating sepsis or septic shock contains a material which induces SIRT1(silent mating type information regulation 2 homolog; Sirtuin1) expression as an active ingredient. The material is interferon beta, cGMP(cyclic guanosine monophosphate), adiponectin, pyruvate, or 2-deoxyglucose. A food composition for preventing or treating sepsis or septic shock contains the material as an active ingredient. The pharmaceutical composition is formulated or co-administered together with anti-inflammatory agent, antipyretic analgesic, anticoagulant, antibiotics, antibacterial agent, and anti-allergic agent.
Patent KR-20120036919-A (KR)
Inventor: KWON YONG JOON
IPC: A47J27/21
Filed: 2012-02-27
Abstract: 본 발명은 대부분의 일반 가정에서 물을 끊이는데 사용하는 전기포트 외에,  소형으로 간편하게 휴대하여 다닐 수 있게 한, 간이용 온수히터 관한 것으로서,  소량의 끊는 물이 필요할 때 전기가 있는 곳이면, 언제 어디서나 간편하게, 컵에 물을 담아 놓고, 그 물에 히터봉를 투입하여, 물을 끊여 마실 수 있도록 하는 것이다.  
또한, 간단하게 물과 물컵을 함께 가열하므로, 물과 물컵의 세균을 동시에 살균시켜 위생적인 물을 제공할 수 있으며, 또 간편하게 필요한 량 만큼의 물만 끊여 사용하므로, 물을 낭비하지 않고 사용할 수 있도록 하는, 소형의 에너지절약형 간이용 온수히터에 관한 것이다.
Patent KR-20130103028-A (KR)
Title: The bridge construction technique for which a construction cable was used
Inventor: KIM CHEOL SOO
IPC: E01D21/00
Filed: 2012-03-09
Abstract: PURPOSE: A concrete temporary bridge using a cable is provided to facilitate the construction of a top plate in a difficult site to assemble re-bars and place concrete. CONSTITUTION: A concrete temporary bridge using a cable comprises a pair of abutments (100), a first cable (200), a steel mold (300), a vertical member (400), a top slab, a second cable (600), and a third cable (700). The pair of abutments is separately formed with a first cable installation part and a second cable installation part at each top end. Both ends of the steel mold are installed at the top end of the abutments to be supported by the first cable. The bottom end of the steel mold is vertically penetrated with a plurality of vertical member joint holes. A plurality of vertical members is arranged in the longitudinal direction of the steel mold. [Reference numerals] (AA) First cable, steel mold, upper slide, second cable installation, and temporarily fixing a third cable; (BB,CC) Temporarily fixing
Patent KR-20130103054-A (KR)
Title: Semiconductor light emitting diode and method for manufacturing thereof
Inventor: KWON SE HUN
IPC: H01L33/28
Filed: 2012-03-09
Abstract: PURPOSE: A semiconductor light emitting diode and a method for manufacturing the same are provided to improve electrical conductivity by forming cladding made of a ZnO material. CONSTITUTION: N-type cladding includes a pillar support part and a pillar part. A conformal active part (61300) is formed on the pillar support part. A quantum well layer and a barrier layer are alternately deposited to form the active part. Conformal p-cladding (61400) is formed on the active part. A transparent electrode (61500) is formed on the p-cladding.
Patent KR-20130104118-A (KR)
Title: Mold for manufacturing particle foam plastic
Inventor: KIM YOUNG TAEK
IPC: B29C44/58
Filed: 2012-03-13
Abstract: PURPOSE: A mold for manufacturing expandable polystyrene products is provided to extend the lifetime of an upper mold and a lower mold and to prevent raw materials and vapor from losing by preventing the abrasion caused by the impact when the upper mold and the lower mold are connected. CONSTITUTION: A mold for manufacturing expandable polystyrene products comprises an upper frame (10), a lower frame (20), an upper mold, a lower mold (40), and an injector (1). The mold forming the expandable polystyrene product is connected to a lower side of the upper frame. The lower frame is formed to face the upper frame and the mold is connected to an upper part. The lower frame includes a lower mold groove (21) formed in which the lower mold can be connected. The upper mold is connected to a lower part of the upper frame and is formed in an upper part shape of the expandable polystyrene product. The lower mold is connected to an upper part of the lower frame and is formed in a lower part shape of the expandable polystyrene product. An insertion hole in which an insertion unit is fixed is formed in the lower mold. The injector is connected to an upper part of the upper frame and injects materials and steam into a space between the upper mold and the lower mold.
Patent KR-20130105181-A (KR)
Title: Manufacturing method of thermal insulation box for lng ship
Inventor: PARK KUN KI
IPC: F17C3/04
Filed: 2012-03-16
Abstract: PURPOSE: A manufacturing method of an insulation box for an LNG ship is provided to improve the production and manufacturing efficiency of an insulation box by reducing the time of manufacturing processes. CONSTITUTION: A manufacturing method of an insulation box for an LNG ship is as follows. A board for an insulation box is fixed using a nailer (1). Side, top, and inner vertical plates of the insulation box are stapled using a stapler (3). The top plates are fixed using the nailer (7) and stapled (8). The insulation box is turned inside out (10). The insulation box is aligned so that a belt sander can move at right angles to the alignment direction of the inner vertical plates (11). The belt sander sands the insulation box (13). The inside of the insulation box is filled with an insulation material. The bottom plate of the insulation box is fixed using the nailer (17) and is stapled (18).
Patent KR-20130114949-A (KR)
Title: Power generating apparatus utilizing buoyanc
Inventor: LEE SEON MANG
IPC: F03B9/00
Filed: 2012-04-10
Abstract: PURPOSE: A power generating device using buoyancy is provided to rotate a sprocket by using a rising (moving) motion of a buoyant member and to obtain power by the rotation of the sprocket. CONSTITUTION: A power generating device using buoyancy includes a liquid jacket (100), an upper end sprocket (210), a lower end sprocket (220), a first and a second frame (310,320), and multiple buoyant members (400). The liquid jacket stores liquid inside. The upper and the lower sprocket are mounted rotatably on the upper and the lower end of the liquid jacket respectively. The first and the second frame are installed on both sides of the upper and the lower end sprocket. The multiple buoyant materials are arranged inside a first and a second frame, and mounted on the upper and the lower sprocket in a mutually connected state and in a caterpillar shape. The first frame is positioned in liquid inside the liquid jacket and on the outside of the liquid jacket of the second frame; and therefore, the buoyant member is raised by buoyancy. The upper and the lower end sprocket are rotated by the movement of the buoyant member.