Patents by Inventor Takeshi Yokota

Takeshi Yokota has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130280551
    Abstract: A high strength galvanized steel sheet having tensile strength of 590 MPa or more which is excellent in fatigue property in punching work, and a manufacturing method thereof are provided. The microstructure includes a ferrite phase having an average grain diameter of 15 ?m or less and an area fraction of 60% or more and a martensite phase having an area fraction of 5 to 40%, and an amount of one or more kinds of oxide selected from a group consisting of Fe, Si, Mn, Al, P, Nb, and Ti generated on a surface layer portion of the steel sheet within 100 ?m in a steel-sheet-side depth direction from a surface of a base steel sheet directly below a galvanized layer is less than 0.060 g/m2 per one-side surface of the steel sheet.
    Type: Application
    Filed: September 28, 2011
    Publication date: October 24, 2013
    Applicant: JFE Steel Corporation
    Inventors: Nobusuke Kariya, Hayato Saito, Takeshi Yokota, Yusuke Fushiwaki
  • Patent number: 8566065
    Abstract: An apparatus for supporting arrangement of operation areas layout includes: a storage unit that stores therein data on a position, a shape, and a use period of each operation area which has already been arranged in a prescribed site; a display control unit that references the data stored in the storage unit and makes a display unit display a top view illustrating arrangement of the operation areas at a given point of time on a temporal axis; and an operation areas layout arrangement processing unit that receives an input of a data on a position, a shape, and a use period of an operation area to be added into the prescribed site, references the data stored in the storage unit, and, if the received and added operation area is not determined to interfere with other already-arranged operation area, stores the data on the added operation area in the storage unit.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: October 22, 2013
    Assignee: Hitachi-GE Nuclear Energy, Ltd.
    Inventors: Yoshibumi Fukuda, Takeshi Yokota, Hisanori Nonaka, Norito Watanabe, Toshiyuki Miyake, Kenji Akagi, Kensuke Morita
  • Publication number: 20130032253
    Abstract: A galvanized steel sheet having excellent formability is provided including steel having a composition which contains, on a percent by mass basis, 0.03% to 0.15% of C, less than 0.5% of Si, 1.0% to 2.5% of Mn, 0.05% or less of P, 0.01% or less of S, 0.05% or less of Al, 0.0050% or less of N, 0.05% to 0.8% of Cr, 0.01% to 0.1% of V, and the balance being Fe and inevitable impurities; and a zinc plating film on a surface of a steel sheet, and wherein a microstructure of the steel contains ferrite having an average grain diameter of 15 ?m or less and 5% to 40% of martensite in an area ratio, and the ratio of martensite having an aspect ratio of less than 3.0 to all the martensite is more than 95% in area ratio.
    Type: Application
    Filed: April 15, 2011
    Publication date: February 7, 2013
    Applicant: JFE STEEL CORPORATION
    Inventors: Nobusuke Kariya, Hayato Saito, Takeshi Yokota
  • Patent number: 8326664
    Abstract: A carry-in ready period calculation part calculates a candidate of a carry-in ready period which is a period during which a carry-in operation can be conducted and outputs the candidate in an output part so as to make entire construction works efficient. The calculation is performed based on a site arrival time schedule which is a time schedule showing when a carry-in target equipment arrives at a site, a temporary placement time schedule which is a time schedule showing when the equipment arrived is temporarily placed, and a construction time schedule of a building in which the equipment is carried.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: December 4, 2012
    Assignee: Hitachi-GE Nuclear Energy, Ltd.
    Inventors: Yoshibumi Fukuda, Takeshi Yokota, Kenichirou Yamane, Kenji Akagi, Kensuke Morita
  • Publication number: 20120216925
    Abstract: A hot-pressed steel sheet member has a composition containing, by mass, C: 0.09% to 0.38%, Si: 0.05% to 2.0%, Mn: 0.5% to 3.0%, P: 0.05% or less, S: 0.05% or less, Al: 0.005% to 0.1%, N: 0.01% or less, Sb: 0.002% to 0.03%, and the balance being Fe and inevitable impurities, and having a tensile strength TS of 980 to 2,130 MPa.
    Type: Application
    Filed: August 19, 2010
    Publication date: August 30, 2012
    Applicant: JFE Steel Corporation
    Inventors: Akio Kobayashi, Yoshimasa Funakawa, Kazuhiro Seto, Nobuyuki Kageyama, Tetsuo Yamamoto, Toru Hoshi, Takeshi Yokota
  • Publication number: 20120221324
    Abstract: In a text document processing apparatus, there is provided standard knowledge network data composed of networked phrases having strong mutual relation to each other, the phrases being selected from a knowledge field including contents of a text document to be examined. In addition, there is provided a document knowledge preparing function that prepares knowledge network data of the document to be examined, the knowledge network data being composed of networked phrases having strong mutual relation to each other, the phrases being selected from the text document. Further, a processing unit that checks a specified word constituting the knowledge network data of the document to be examined and a standard knowledge network data, and in a case when information of phrases which are networked to the specified word are different from each other, outputs difference information including information of the specified word.
    Type: Application
    Filed: February 15, 2012
    Publication date: August 30, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Kimiyoshi Machii, Kaoru Kawabata, Takeshi Yokota, Yoshiyuki Kobayashi, Masakazu Fujio
  • Patent number: 8188466
    Abstract: A resistance variable element is provided, which is capable of performing bipolar operation by a specified mechanism and usable as a memory. The resistance variable element has a laminated structure including an electrode, another electrode, an oxide layer between the electrodes, and an oxide layer in contact with the oxide layer between the oxide layer and the electrode. The oxide layer is switchable from the low-resistance state to the high-resistance state by donating oxygen ions to the oxide layer, and from the high-resistance state to the low-resistance state by accepting oxygen ions from the oxide layer. The oxide layer is switchable from the low-resistance state to the high-resistance state by accepting oxygen ions from the oxide layer, and from the high-resistance state to the low-resistance state by donating oxygen ions to the oxide layer.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: May 29, 2012
    Assignees: Fujitsu Limited, National University Corporation Nagoya Institute of Technology
    Inventors: Hiroyasu Kawano, Keiji Shono, Manabu Gomi, Takeshi Yokota
  • Publication number: 20120107633
    Abstract: A high-strength steel sheet includes a composition containing, in mass percent, 0.08% to 0.20% of carbon, 0.2% to 1.0% of silicon, 0.5% to 2.5% of manganese, 0.04% or less of phosphorus, 0.005% or less of sulfur, 0.05% or less of aluminum, 0.07% to 0.20% of titanium, and 0.20% to 0.80% of vanadium, the balance being iron and incidental impurities.
    Type: Application
    Filed: June 29, 2010
    Publication date: May 3, 2012
    Applicant: JFE STEEL CORPORATION
    Inventors: Koichi Nakagawa, Takeshi Yokota, Kazuhiro Seto, Satoshi Kinoshiro, Yuji Tanaka, Katsumi Yamada, Tetsuya Mega, Katsumi Nakajima
  • Publication number: 20120005103
    Abstract: In a construction simulation apparatus: a 3-D already-existing model, installation progress data, and a 3-D new-construction model are recorded in databases; a match determination unit determines similarity in one or more installation positions of one or more of pieces of equipment and piping components between the 3-D already-existing model and the 3-D new-construction model; and a progress selection unit selects, as portions of installation schedule data corresponding to the 3-D new-construction model, portions of the installation progress data corresponding to matching portions of the 3-D already-existing model, on the basis of data indicating a correspondence relationship between the 3-D already-existing model and the installation progress data, where the matching portions of the 3-D already-existing model are extracted by the match determination unit and respectively match the portions of the 3-D new-construction model.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 5, 2012
    Inventors: Hiroshi Seki, Takeshi Yokota
  • Publication number: 20110301995
    Abstract: A carry-in ready period calculation part calculates a candidate of a carry-in ready period which is a period during which a carry-in operation can be conducted and outputs the candidate in an output part so as to make entire construction works efficient. The calculation is performed based on a site arrival time schedule which is a time schedule showing when a carry-in target equipment arrives at a site, a temporary placement time schedule which is a time schedule showing when the equipment arrived is temporarily placed, and a construction time schedule of a building in which the equipment is carried.
    Type: Application
    Filed: June 2, 2011
    Publication date: December 8, 2011
    Inventors: Yoshibumi Fukuda, Takeshi Yokota, Kenichirou Yamane, Kenji Akagi, Kensuke Morita
  • Publication number: 20110290383
    Abstract: A high strength cold rolled steel sheet excellent in weldability and has a TS of 440 MPa or more includes a composition including C: 0.0005 to 0.005%, Si: 0.1 to 1.0%, Mn: 1 to 2.5%, P: 0.01 to 0.2%, S: 0.015% or less, sol. Al: 0.05% or less, N: 0.007% or less, Ti: 0.01 to 0.1%, B: 0.0005 to 0.0020%, Cu: 0.05 to 0.5%, and Ni: 0.03 to 0.5% by mass with the balance Fe and incidental impurities; and a microstructure constituted by a ferrite single phase.
    Type: Application
    Filed: July 24, 2009
    Publication date: December 1, 2011
    Applicant: JFE STEEL CORPORATION
    Inventors: Hiromi Yoshida, Hayato Saito, Takeshi Yokota, Yasushi Tanaka
  • Publication number: 20110271733
    Abstract: A method for manufacturing a high strength hot rolled steel sheet includes heating a slab to a temperature in the range of 1150 to 1300° C.; hot rolling the slab with a finishing rolling temperature being in the range of 800 to 1000° C.; cooling the steel sheet at a mean cooling rate of 30° C./s or higher to a cooling termination temperature in the range of 525 to 625° C.; suspending cooling for a time period in the range of 3 to 10 seconds; cooling the steel sheet in such a manner that cooling of the steel sheet is nucleate boiling; and coiling the steel sheet at a temperature in the range of 400 to 550° C.
    Type: Application
    Filed: August 20, 2008
    Publication date: November 10, 2011
    Applicant: JFE STEEL CORPORATION
    Inventors: Takeshi Yokota, Kazuhiro Seto, Satoshi Ueoka, Nobuo Nishiura, Yoichi Tominaga
  • Publication number: 20110139316
    Abstract: A high strength galvanized steel sheet with excellent appearance that does not have non-uniformity of coating or coating defects or allow linear defects to occur after press forming includes a steel sheet having a ferrite single-phase structure and having a composition containing 0.0005% to 0.0040% by mass of C; 0.1% to 1.0% by mass of Si; 1.0% to 2.5% by mass of Mn; 0.01% to 0.20% by mass of P; 0.015% by mass of less of S; 0.01% to 0.10% by mass of Al; 0.0005% to 0.0070% by mass of N; 0.010% to 0.080% by mass of Ti; 0.0005% to 0.0020% by mass of B; 0.05% to 0.50% by mass of Cu; 0.03% to 0.50% by mass of Ni; and the balance of Fe and incidental impurities.
    Type: Application
    Filed: July 28, 2009
    Publication date: June 16, 2011
    Applicant: JFE STEEL CORPORATION
    Inventors: Hayato Saito, Hiromi Yoshida, Takeshi Yokota, Yasushi Tanaka
  • Patent number: 7955444
    Abstract: A high tensile steel sheet having 980 MPa or higher tensile strength with excellent elongation and stretch-flange formability, suitable for the press-forming of complex cross sectional shape such as automobile parts, is manufactured by adjusting the steel to consist essential of a ferrite single phase structure, to precipitate carbide containing Ti, Mo, and V, of smaller than 10 nm of average particle size, in dispersed state, and to have an average composition of the carbide containing Ti, Mo, and V satisfying [V/(Ti+Mo+V)?0.3 (atomic ratio].
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: June 7, 2011
    Assignee: JFE Steel Corporation
    Inventors: Tamako Ariga, Takeshi Yokota, Akio Kobayashi, Kazuhiro Seto
  • Publication number: 20110029098
    Abstract: An apparatus for supporting arrangement of operation areas layout includes: a storage unit that stores therein data on a position, a shape, and a use period of each operation area which has already been arranged in a prescribed site; a display control unit that references the data stored in the storage unit and makes a display unit display a top view illustrating arrangement of the operation areas at a given point of time on a temporal axis; and an operation areas layout arrangement processing unit that receives an input of a data on a position, a shape, and a use period of an operation area to be added into the prescribed site, references the data stored in the storage unit, and, if the received and added operation area is not determined to interfere with other already-arranged operation area, stores the data on the added operation area in the storage unit.
    Type: Application
    Filed: July 28, 2010
    Publication date: February 3, 2011
    Inventors: Yoshibumi FUKUDA, Takeshi Yokota, Hisanori Nonaka, Norito Watanabe, Toshiyuki Miyake, Kenji Akagi, Kensuke Morita
  • Publication number: 20100274803
    Abstract: A document preparation support apparatus outputs a knowhow and a response example for each critical passage of a document. The document preparation support apparatus includes a storage unit. The storage unit includes: first corresponding information that stores a knowhow in association with a search key for extracting a critical passage; and second corresponding information that stores a response example in association with a search key for extracting a critical passage. The document preparation support apparatus also includes a control unit. The control unit receives a document; extracts a critical passage from the received document using a prescribed search key from among the search keys; searches the first corresponding information and the second corresponding information using the search key used for the extraction to obtain a knowhow and a response example; and outputs the obtained knowhow and response example in association with the critical passage.
    Type: Application
    Filed: April 28, 2010
    Publication date: October 28, 2010
    Applicant: Hitachi, Ltd.
    Inventors: Kimiyoshi MACHII, Takeshi Yokota, Jinichiro Goto, Mitsuru Obana, Osamu Arai
  • Publication number: 20100228682
    Abstract: A simulation for an efficient allocation of the resources, such as funds and manpower, can be performed in plural concurrent projects in order to minimize a delay period and excess of cost. The simulation is practiced with each project regarded as an agent and the optimized solution is outputted by using a genetic algorithm. Specifically, a risk factor of each project is inputted by input means, and the optimal allocation of facilities and labor is determined by arithmetic means with a delay period and a delay event probability using a delay risk model, time development of production, and minimization of an objective function.
    Type: Application
    Filed: February 19, 2010
    Publication date: September 9, 2010
    Applicant: Hitachi, Ltd.
    Inventors: Yuichi IKEDA, Shingo Miyazaki, Takeshi Yokota, Kenji Hatsuda
  • Publication number: 20100196189
    Abstract: A high-strength steel sheet has high stretch flangeability after working and corrosion resistance after painting. The steel sheet contains, on the basis of mass percent, C: 0.02% to 0.20%, Si: 0.3% or less, Mn: 0.5% to 2.5%, P: 0.06% or less, S: 0.01% or less, Al: 0.1% or less, Ti: 0.05% to 0.25%, and V: 0.05% to 0.25%, the remainder being Fe and incidental impurities. The steel sheet has a substantially ferritic single phase, the ferritic single phase containing precipitates having a size of less than 20 nm, the precipitates containing 200 to 1750 mass ppm Ti and 150 to 1750 mass ppm V, V dissolved in solid solution being 200 or more but less than 1750 mass ppm.
    Type: Application
    Filed: July 31, 2008
    Publication date: August 5, 2010
    Applicant: JFE STEEL CORPORATION
    Inventors: Koichi Nakagawa, Takeshi Yokota, Nobuyuki Nakamura, Kazuhiro Seto, Satoshi Kinoshiro, Katsumi Yamada
  • Patent number: 7729932
    Abstract: A computer readable storage medium encoded with a project assessment program for assessing a project including a plurality of processes when executed by a computer computing forecasts of the project based on a set of information. At least one scheme by a user input is selected from a group of schemes including an estimation of mutual-correlation of estimated value pattern. Process planning information, up-to-date actual process information and forecast model information of each process included in the project is retrieved. The forecast model information of each process of the project is defined as probability distribution variations of a plurality of parameters of the processes, wherein the probability distribution variations are quantitative values of the project. Estimated values of variations in at least two parameters of the processes using the process planning information, the up-to-date actual process information and the forecast model information are computed.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: June 1, 2010
    Assignees: Hitachi, Ltd., Hitachi Plant Engineering & Construction Co., Ltd.
    Inventors: Takeshi Yokota, Hisanori Nonaka, Kenji Araki, Youichi Nishikawa, Makoto Kudoh
  • Publication number: 20090308504
    Abstract: A steel sheet excellent in FB performance and also excellent in fabrication performance after FB working and a manufacturing method of the same are provided. The steel sheet is a steel sheet having a composition containing from 0.1 to 0.5% of C, not more than 0.5% of Si and from 0.2 to 1.5% of Mn in terms of % by mass, with P and S being adjusted at proper ranges and having a structure having a ferrite having an average grain size of more than 10 ?m and less than 20 ?m and a cementite present in the ferrite grain having an average particle size of from 0.3 to 1.5 ?m. In this way, the steel sheet becomes a steel sheet excellent in FB performance, mold life and performance (side bend elongation) after FB working.
    Type: Application
    Filed: January 29, 2007
    Publication date: December 17, 2009
    Applicant: JFT Steel corporation, a corporation of Japan
    Inventors: Nobusuke Kariya, Takeshi Yokota, Nobuyuki Nakamura, Kazuhiro Seto