baber/WOPTO huggingface dataset:
Patent KR-20090084932-A (KR)
Title: Aluminum-silicate based orange-red phosphors with mixed divalent and trivalent cations
Inventor: LIU SHENGFENG
IPC: H01J1/62
Filed: 2007-10-25
Abstract: Novel aluminum-silicate based orange-red phosphors, with mixed di-and trivalent cations are disclosed. The phosphors have the formula (Sr1-x-yMxTy)3-mEum (Si1_zAlz)05, where M is at least one of Ba, Mg, Ca, and Zn in an amount ranging from O<=x<=O.4. T is a trivalent metal in an amount ranging from 0<y<0. This phosphor is configured to emit visible light having a peak emission wavelength greater than about 580 nm. The phosphors may contain a halogen anion such as F, Cl, and Br, at least some of which is substitutionally positioned on oxygen lattice sites. The present aluminum-silicate phosphors have applications in white and orange-red illumination systems, as well as plasma display panels. ® KIPO & WIPO 2009
Patent KR-20090082472-A (KR)
Title: Crystalline modification of fipronil
Inventor: SAXELL HEIDI EMILIA
IPC: A01P7/00
Filed: 2007-11-05
Abstract: The present invention relates to a crystalline modification of fipronil, to a process for the preparation of the same, to pesticidal and parasiticidal mixtures and compositions comprising said crystalline modification and to their use for combating pests and parasites.
Patent KR-20090102771-A (KR)
Title: Validating caller id information to protect against caller id spoofing
Inventor: CAI YIGANG
IPC: H04L9/32
Filed: 2007-12-17
Abstract: Caller ID validation system (106) and methods are provided. When a call is placed over a communication network (100), a validation system (106) receives the call signaling, and processes the call signaling to identify originating node information in the call signaling. The originating node information is inserted by the communication network (100) when handling the call and pertains to a network node (102) that originates the call into the network. The validation system (106) also processes the call signaling to identify caller ID information for the call. The validation system (106) then processes the originating node information and the caller ID information to determine whether the call originated from the originating node (102). If the call did originate from the originating node (102), then the validation system (106) determines that the caller ID information is valid.
Patent KR-20090091209-A (KR)
Title: Transparent, colorless titania-free beta-quartz glass-ceramic
Inventor: AITKEN BRUCE
IPC: C03C3/085
Filed: 2007-11-29
Abstract: The invention relates to a transparent and essentially colorless beta-quartz glass-ceramic material which is free of TiO2, As2O3, Sb2O3 and phosphates; articles formed from said glass-ceramic material; lithium aluminosilicate glasses, precursors for said glass-ceramic material; and methods of producing said glass-ceramic material and said articles formed from said glass-ceramic material. ® KIPO & WIPO 2009
Patent KR-20090092309-A (KR)
Title: Catalyst system and process for gas-phase oxidation using a preliminary zone
Inventor: WILMER HAGEN
IPC: B01J8/04
Filed: 2007-12-12
Abstract: The present invention relates to a method for gas phase oxidation, wherein a gaseous flow comprising aromatic hydrocarbon and molecular oxygen is conducted through two or more catalyst layers. The present invention further relates to a catalyst system for gas phase reaction using an upstream layer. The product of diameter times the height, or the volume, of the inert and/or catalyst rings disposed upstream is less than at least one of the subsequent catalyst layers, or the quotient of the surface per volume of the upstream inert and/or catalyst rings is greater than at least one of the subsequent catalyst layers. ® KIPO & WIPO 2009
Patent KR-20090101289-A (KR)
Title: Plasma deposited microporous carbon material
Inventor: PAOLUCCI DORA M
IPC: B01D71/02
Filed: 2007-12-13
Abstract: A microporous carbon material includes a porous carbon skeleton (115) having an average pore size from 0.1 to 10 nanometers and being substantially free of pores (110) greater than 1 micrometer. Methods of forming the microporous carbon material are also disclosed.
Patent KR-20090110334-A (KR)
Title: Systems and methods for rejoining a second group of nodes with a first group of nodes using a shared group key
IPC: H04W12/04
Filed: 2008-01-17
Abstract: A method for rejoining a second group of nodes with a first group of nodes is described. A first state of a first group key associated with a first group of nodes is received. The first state of the first group key is multicast to a second group of nodes. The first group key is rekeyed to a second group key associated with the second group of nodes. A second state of the second group key is multicast to the second group of nodes. A third state of a third group key associated with the first group of nodes is received. A rekey command is multicast to the second group of nodes if the third state is different from the second state. The second group key is rekeyed to the third group key.
Patent KR-20090101497-A (KR)
Title: A method and apparatus for decoding/encoding a video signal
Inventor: JEON BYEONG MOON
IPC: H04N7/32
Filed: 2007-03-30
Abstract: PURPOSE: A method for decoding/encoding video signal and an apparatus thereof including an inverse quantization unit are provided to perform prediction between efficient times by managing a reference picture list by classifying inter view picture group and non-inter view picture group. CONSTITUTION: A decoding apparatus includes an entropy decoding unit(200), an inverse quantization/de-conversion unit(300), an intra prediction unit(400), a de-blocking filter unit(500) and a decoding picture buffer unit. The bit stream parsed through the entropy decoding is decoded with entropy. The changed count value is obtained the fixed constant is multiplied and quantized. The intra estimator performs the intra prediction from the decoded sample within a picture. The filter improves the picture quality of the frame.
Patent KR-20090115863-A (KR)
Title: Improved medicinal compositions comprising buprenorphine and naloxone
Inventor: CHAPLEO CHRISTOPHER BOURNE
IPC: A61K31/485
Filed: 2008-02-15
Abstract: There is provided a composition for the treatment of pain in human patients wherein said composition comprises buprenorphine to naloxone in a ratio by weight of from 2.1:1 to 8:1, the amount of buprenorphine and naloxone being suitable to provide analgesia, the composition being in a transdermal or transmucosal dosage form. Also provided are an associated method and use.
Patent KR-20090121299-A (KR)
Title: Method and apparatus for enhancing rlc for flexible rlc pdu size
Inventor: PANI DIANA
IPC: H04L47/22
Filed: 2008-02-04
Abstract: Enhancements are provided for the radio link control (RLC) protocol in wireless communication systems where variable RLC packet data unit (PDU) size is allowed. When flexible RLC PDU sizes are configured by upper layers, radio network controller (RNC)/Node B flow control, RLC flow control, status reporting and polling mechanisms are configured to use byte count based metrics in order to prevent possible buffer underflows in the Node B and buffer overflows in the RNC. The enhancements proposed herein for the RLC apply to both uplink and downlink communications.
Patent KR-20090121354-A (KR)
Title: Wireless node search procedure
Inventor: DESHPANDE MANOJ M
IPC: H04W4/02
Filed: 2008-02-21
Abstract: An access terminal scans for nearby access points and maintains a candidate list of access point with which the access terminal may associate in the event the access terminal's communication with its current access point deteriorates for some reason. This search procedure may be performed in a proactive manner whereby the access terminal repeatedly performs scans and updates its list of candidate access points when it is powered on. In some aspects, the search procedure used by the access terminal may be based on a state of the wireless device. In addition, different states of the access terminal may be associated with different optimization criteria.
Patent KR-20090120500-A (KR)
Title: Method for treating cb2 receptor mediated pain
Inventor: XIA MINGDE
IPC: A61P29/00
Filed: 2008-02-27
Abstract: The present invention is directed to a method for treating, ameliorating or preventing CB2 receptor mediated pain in a subject in need thereof comprising administering to the subject an effective amount of a compound of formula (I): or a form thereof, wherein X1R1, X2R2, X3R3, X4R4 and X5R5 are as defined herein.
Patent KR-20100015376-A (KR)
Title: AMINO-5-[SUBSTITUTED-4-(DIFLUOROMETHOXY)PHENYL]-5-PHENYLIMIDAZOLONE COMPOUNDS AS beta-SECRETASE INHIBITORS
Inventor: MALAMAS MICHAEL SOTIRIOS
IPC: A61P25/28
Filed: 2008-03-20
Abstract: The present invention provides a 2-amino-5-[substituted-4-(difluoromethoxy)phenyl]-5-phenylimidazolone compound of formula (I) The present invention also provides methods for the use thereof to inhibit β-secretase (BACE) and treat β-amyloid deposits and neurofibrillary tangles.
Patent KR-20100016491-A (KR)
Title: Optoelectronic component
Inventor: ILLEK STEFAN
IPC: H01L33/10
Filed: 2008-04-25
Abstract: The invention relates to an optoelectronic component comprising a semiconductor body (2) which has a series of semiconductor layers with an active region (4) that is suitable for generating radiation, a reflective layer (72) situated on the semiconductor body and two electric contacts (7,8). A first contact (7) of said contacts on the side of the active region that faces the reflective layer is connected in an electrically conductive manner to the semiconductor body, the second contact (8) of said contacts on the side of the active region that faces away from the reflective layer is connected in an electrically conductive manner to the semiconductor body and the reflective layer lies between a sub-region of the second contact and the semiconductor body.
Patent KR-20100017282-A (KR)
Title: Device for mounting solar modules
Inventor: GENSCHOREK GIDO
IPC: F16C11/02
Filed: 2008-04-03
Abstract: The invention relates to a device for mounting solar modules/panels on props that are introduced into the ground of the mounting location. Supports that can be connected on top of or on the props are disposed with the help of fastening means which allow for vertical compensation and/or lateral compensation of deviations of the introduced props from the perpendicular. The fastening means encompass a rail (3) that can be connected to the prop (2), a T-shaped, L-shaped, or U-shaped connecting flange (4) with at least one connector (8) for a support (5), and a rocker bearing (6) which allows the connection between the rail (3) and the connecting flange (4) to be established.
Patent KR-20100012043-A (KR)
Title: Plasma display device
Inventor: MURATA MITSUHIRO
IPC: H01J11/24
Filed: 2009-04-14
Abstract: A protecting layer (26) of a plasma display panel is constituted to include a substrate protecting layer (26a) formed of a thin film of a metal oxide containing at least one of magnesium oxide, strontium oxide, calcium oxide and barium oxide, and a particle layer (26b) formed by adhering single-crystal particles (27) of magnesium oxide having a ratio of 2 or more between the peak of 200 nm - 300 nm and the peak of 300 nm - 550 nm of the emission spectrum of a cathode luminescence emission, to the substrate protecting layer (26a). A panel drive circuit is characterized in that the panel is driven by generating an initializing discharge for establishing a wall charge in the first one of a plurality of subfields and by generating a writing discharge for erasing the wall charge for a writing period of the plural subfields.
Patent KR-20100028586-A (KR)
Title: Solid dialysis preparation
Inventor: SUGIYAMA YOSHIHIRO
IPC: A61K47/02
Filed: 2008-05-30
Abstract: Disclosed is a powdery dialysis preparation which is prepared by using a solid organic acid, does not contain acetic acid as a pH-adjusting agent, and is reduced in the decomposition of glucose therein. Specifically disclosed is a solid dialysis preparation which comprises an electrolyte component, glucose and a pH-adjusting agent. The solid dialysis preparation further comprises a solid organic acid, wherein the solid organic acid contains a fine powder fraction at a small ratio, specifically contains a fraction of particles having a particle diameter of 250 μm or smaller at a ratio of 20% or less or a fraction of particle having a particle diameter of 150 μm or smaller at a ratio of 10% or less. Preferably, the solid organic acid is citric acid.
Patent KR-20110080553-A (KR)
Title: Method for melody line decision from melody pitch candidates based on melody line properties
Inventor: YOO CHANG DONG
IPC: G10K15/00
Filed: 2010-01-06
Abstract: PURPOSE: A melody line decision method from melody pitch candidates on the basis of the property of a melody line is provided for N melody pitch candidates and each melody pitch candidate to efficiently determine a melody line on the basis of physical properties of the melody line. CONSTITUTION: A system is input information about N melody pitch candidates and weight which the melody pitch candidate has in each frame(S10). In a start frame, the system selects N melody pitch candidates and arrays the candidate in a weight descending order(S40). The system determines whether two neighbor melody pitch candidates satisfy set melody line standards(S50). The system selects N melody line candidates through a melody line connection in each melody section(S60). The system selects an optimal melody line(S70).
Patent KR-20110081681-A (KR)
Title: Method for providing learning service in learning management system and method for providing learning service in electronic book terminal
Inventor: PARK HONG KYUN
IPC: G06Q50/20
Filed: 2010-01-08
Abstract: PURPOSE: A learning service providing method of a learning management system and a learning service providing method of an E-book terminal are provided to offer an interactive learning environment to reinforce the cognitive activity of a learner. CONSTITUTION: An E-book terminal displays learning related content in a screen(S401). In the screen, a user clicks a specific area or a specific button(S403). The E-book terminal divides the screen into a plurality of windows and displays the learning related content in the divided screen(S405). The specific button is a hint button. Separate content is respectively displayed in the plurality of windows.
Patent KR-20110082857-A (KR)
Title: Additive composition of gypsum based finishing plaster and gypsum based finishing plaster comprising the composition
Inventor: SHIN YOUNG HOON
IPC: C04B28/16
Filed: 2010-01-12
Abstract: PURPOSE: An additive composition of gypsum based finishing plaster and gypsum based finishing plaster comprising the composition are provided to improve the application in primary plaster work and reduce the resistance of plasterer's float. CONSTITUTION: An additive composition of gypsum based finishing plaster comprises cellulose ether of 60~97 weight%, polyacrylamide of 0.5~10 weight%, and guar gum. The cellulose ether comprises one or more selected from the group consisting of methyl cellulose, hydroxypropylmethyl cellulose, hydroxyethylmethyl cellulose, hydroxyethyl cellulose, ethylhydroxyethyl cellulose, and methylethyl hydroxyethyl cellulose. The content of the guar gum is 1~20 parts by weight to the cellulose ether of 100 parts by weight.
Patent KR-20110083834-A (KR)
Title: Vertical type absorption chiller
Inventor: CHO HYUN UK
IPC: F25D11/00
Filed: 2010-01-15
Abstract: PURPOSE: A vertical type adsorptive chiller is provided to improve heat exchange efficiency by expanding the bottom area of a heat exchanger. CONSTITUTION: A vertical type adsorptive chiller comprises an evaporator(250), an absorber(210), a first transfer pipe(301), a high-temperature regenerator(20), and a condenser(240). The absorber is arranged on the top of the evaporator and absorbs refrigerant vapor to an absorbent. The first transfer pipe vertically connects the evaporator and the absorber and transfers the refrigerant vapor from the evaporator to the inside the absorber. The high-temperature regenerator separates the refrigerant vapor from the absorbent. The condenser condenses the separated refrigerant vapor.
Patent KR-20110084566-A (KR)
Title: Auotmatic chute for environmental protection in conveyor discharging system
Inventor: JANG YOUNG TAE
IPC: B66D1/56
Filed: 2010-01-18
Abstract: PURPOSE: An environment protection automatic chute of conveyor discharging system, in which the length of chute is automatically controlled according to the height of dropped object, is provided to prevent malfunction by reinforcing a safety system and to prevent the scattering of dust. CONSTITUTION: An environment protection automatic chute of conveyor discharging system comprises an automatic chute, a hoisting device, a hopper(3), a sensor, a controller(5), and a mainframe(6). The inside of the automatic chute is hollow form. The automatic chute is comprised of a plurality of single chutes in quadrangular prism shape. The single chutes are getting bigger from the one located on the upper part to accomplish multilayer. The single chute is comprised of a top layer single chute(11), an intermediate layer single chute(12), and a lowest layer single chute(13). A lower part protective skirt(134) is formed on the lowest layer single chute. The lower part protective skirt blocks up the scattering of the dropping object and protect the sensor.
Patent KR-20110085619-A (KR)
Title: Vertical wind power generator
Inventor: CHO HYUNG JUN
IPC: F03D11/02
Filed: 2010-01-21
Abstract: PURPOSE: A vertical axis aerogenerator is provided to minimize resistivity in the transmission of power to a generator from a gearbox. CONSTITUTION: A vertical axis aerogenerator comprises a windmill(10), a gearbox, and a generator(20). The windmill has a vertical pivot(11). The gearbox is axis-connected in the vertical pivot and increases the rotation speed of a windmill. The generator is axis-connected with the gearbox to receive torque and changes to electrical energy. The gearbox comprises a first rotary shaft(100) and a second rotary shaft. The first rotary shaft accomplishes the same axis line as the vertical shaft line of the vertical pivot and is axis-connected with a gear.
Patent KR-20110088226-A (KR)
Title: A method and an apparatus for processing image
Inventor: KIM EUN YOUNG
IPC: H04N5/225
Filed: 2010-01-28
Abstract: PURPOSE: A moving picture processing apparatus and a method thereof are provided to photograph whole area as well as an interested area. CONSTITUTION: A target area setting unit(310) establishes a target area among a video photographing area. A total area processing unit(320a) processes whole area among the video photographing area. A target area processing unit(330a) processes the target area among the video photographing area. A video file generator(324) creates a first moving picture file about the whole area. A second moving picture file generator(334a) creates the second moving picture file about the target area.
Patent KR-20100097604-A (KR)
Title: Weight plate of vacuum evaporation apparatus and vacuum evaporation apparatus using the same
Inventor: EIDA MASATAKA
IPC: C23C14/04
Filed: 2010-02-22
Abstract: PURPOSE: A weight plate for a vacuum deposition apparatus and a vacuum deposition apparatus using the same are provided to carry out the stable transport of a shadow mask and a glass substrate by pressing the glass substrate onto the shadow mask by gravity. CONSTITUTION: A vacuum deposition apparatus comprises an evaporator, a joint carrier(500), and a transfer unit. In the joint carrier, a glass substrate is placed over a shadow mask and fixed to a holding member. A weight plate(109) is installed on the glass substrate so as to press and hold the glass substrate onto the shadow mask by gravity. The transfer unit transfers the joint carrier. The weight plate includes a buffer member which reduces an impact applied to the joint carrier in the in-plane direction of the glass substrate.
Patent KR-20110100539-A (KR)
Inventor: EUM WOO CHUL
IPC: B60W30/02
Filed: 2010-03-04
Abstract: 본 발명은 차량의 수직방향 가속도 감지를 통해 차량의 전복 여부를 판단하고 후속 안전 조치를 취할 수 있도록 한 차량의 전복 감지 장치에 관한 것으로, 차량의 수직방향 가속도를 감지하는 가속도 감지부와, 상기 가속도 감지부로부터 감지한 가속도를 기준가속도와 비교하여 차량전복 여부를 판단하는 제어부를 포함하는 것을 특징으로 한다.
Patent KR-20110106601-A (KR)
Inventor: KIM JAE HO
IPC: H01L21/28
Filed: 2010-03-23
Abstract: 본 발명은 기판 상에 게이트 전극과 소스 및 드레인 전극이 상하 방향으로 이격되어 형성되고, 게이트 전극과 소스 및 드레인 전극 사이에 게이트 절연막 및 활성층이 형성되며, 드레인 전극의 일부를 노출시키는 콘택홀이 형성되는 박막 트랜지스터의 제조 방법에 관한 것으로서, 게이트 전극, 소스 및 드레인 전극 중 적어도 하나는 프린팅(printing), 쉐도우 마스크(shadow mask)를 이용한 증착 방법 중 적어도 어느 하나의 방법으로 형성되고, 드레인 전극의 일부를 노출시키는 콘택홀은 레이저 스크라이빙(laser scribing) 및 반응성 이온 에칭(Reactive Ion Etching : RIE) 중 적어도 하나의 방법으로 형성된다. 
따라서 본 발명에 실시예에 의하면 별도의 포토 공정을 거치지 않는 직접 패터닝 방법으로 게이트 전극, 소스 및 드레인 전극, 콘택홀을 형성함에 따라, 공정을 단순화할 수 있다. 또한 공정 시간 및 공정 비용을 감소시키는 효과가 있다.
Patent KR-20110107087-A (KR)
Inventor: LEE TAE KEUN
IPC: E04H9/16
Filed: 2010-03-24
Abstract: 본 발명은 간이구조물의 자동제설시스템은 간이 구조물(1)의 적설 유무를 각종 감지센서(21,22,23)로 정확하게 센싱하는 제어부(20)와, 상기 제어부(20)를 조작하되 비교데이트를 저장하는 컴퓨터(10)와, 상기 제어부(20)의 신호로 동작하여 충격에너지로 제설작업을 수행하는 충격수단(110), 및 상기 제어부(20)의 신호로 동작하여 진동으로 제설작업을 수행하는 진동수단(110)으로 구성하는 것으로, 제어부(20)에 인가된 눈감지센서(21)와 무게감지센서(22) 및 풍속감지센서(23)의 데이터를 컴퓨터(10) 내의 설정된 데이터와 비교하여 설정무게값을 결정하고, 설정무게값을 일정기준 이상이면 충격수단(110)과 진동수단(120)을  동작시켜 제설작업을 수행하도록 하므로, 골프 연습장이나 비닐하우스 등의 야외 간이 구조물에 제설을 용이하게 하여 설압에 따른 구조물의 붕괴를 억제하도록 하는 것이다.
Patent KR-20110108786-A (KR)
Inventor: MOON JOON OH
IPC: C22C38/00
Filed: 2010-03-29
Abstract: 항복강도 560MPa 이상의 고강도 API(American Petroleum Institute) 열연강판 및 그 제조 방법에 대하여 개시한다.  
본 발명에 따른 고강도 API 열연강판 제조 방법은 (a) 탄소(C) : 0.23 중량% 이하, 실리콘(Si) : 0.55 중량% 이하, 망간(Mn) : 2.5 중량% 이하, 인(P) 0.04 중량% 이하, 황(S) : 0.04 중량% 이하를 포함하고, 니켈(Ni), 몰리브덴(Mo) 및 구리(Cu) 중 1종 이상을 포함하되, 533 + 300 X [Mo] + 10 X [Ni] + 200 X [Cu] ≥ 560(여기서, [Mo], [Cu], [Ni]는 각 성분의 중량%를 의미한다)을 만족하며, 나머지 Fe와 기타 불가피한 불순물로 이루어진 슬라브 판재를 재가열하는 단계; (b) 상기 재가열된 판재를 열간 압연하는 열간 압연 단계; (c) 상기 열간 압연된 판재를 냉각하는 냉각 단계; 및 (d) 상기 냉각된 판재를 권취하는 권취 단계;를 포함하는 것을 특징으로 한다.
Patent KR-20110109140-A (KR)
Inventor: SU KIL SUNG
IPC: G01N21/64
Filed: 2010-03-30
Abstract: 본 발명은 광섬유와 밴드패스필터를 이용한 조류 형광량 측정 시스템에 관한 것이다.  본 발명에 따른 조류 형광량 측정 시스템은, 광원의 발광 상태를 조절하는 광원 제어부, 광원을 장착하여 광원을 통해 발광된 빛 중에서 특정 파장의 빛만 필터링하여 통과시키는 광변환부, 그리고 광변환부로부터 필터링된 빛을 복수의 광섬유를 통하여 수신하고, 수신된 빛을 이용하여 조류의 형광량을 측정하는 형광 측정 장치를 포함한다.   
이와 같이 본 발명에 따르면, 밴드패스필터를 통해 필터링된 특정 파장의 빛을 광섬유를 통하여 균일한 강도로 조류에 조사시키도록 함으로써, 사용자가 필요로하는 광파장을 생성할 수 있으며, 이에 따라 조류 측정의 정확성을 향상시킬 수 있다.   
또한 기존 장치에 큰 구조 변경없이 LED의 설치위치와 무관하게 다양한 밴드패스필터의 장착이 가능하다.  그리고 유연한 재질을 가지는 광섬유를 이용함으로써 조류 형광 측정부의 위치와 모양에 상관없이 조류 형광 측정부와 연결이 가능하므로 용이하게 조류의 형광량을 측정할 수 있다.
Patent KR-20110109302-A (KR)
Inventor: CHUNG MUN IL
IPC: C08L33/06
Filed: 2010-03-31
Abstract: 본 발명은 폴리올레핀 복합소재 조성물에 관한 것으로, 보다 상세하게는 폴리프로필렌, 폴리에틸렌, 폴리부텐, 폴리옥텐 및 폴리이소프렌으로 구성된 군으로부터 선택된 1종 이상의 폴리올레핀계 수지 50 내지 95 중량%, 무기충전제 3 내지 30%, 이오노머 1 내지 20%중량, 글래스버블(Glass Bubble) 1 내지 10중량%를 포함한 폴리올레핀 복합소재 조성물에 관한 것으로, 본 발명은 폴리올레핀과 글래스버블간 상용성(Compatibility) 개선을 통해 충격강도, 인장강도, 굴곡탄성율 등 기계적 물성을 향상시킨 폴리프로필렌 복합소재 및 중량절감이 가능하면서도 냄새 발생이 적은 폴리올레핀 복합소재 조성물을 제공한다.
Patent KR-20100111626-A (KR)
Title: Solid step drill
Inventor: WEDNER HANS
IPC: B23B27/22
Filed: 2010-04-06
Abstract: PURPOSE: A solid step drill for forming a hole with high precision, when forming and discharging long chips, is provided to secure high dimensional accuracy toward a cylindrical hole of a wall which is formed by cutting blades. CONSTITUTION: A solid step drill comprises two cylindrical sections(4,5), a first cutting blade(9), and a second cutting blade. A first section is expanded from the rear side of a front tip(2). The first section is changed into the rearward section with a big diameter after a step(6). A step drill is recessed on the first section and the second section. Two first cutting blades actuate in cooperation with a chip flute(10). A chip breaking groove is formed between a sub chip flute and a line of a cutting blade around a second cutting blade.