Patents by Inventor Takeshi Yasuda

Takeshi Yasuda 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).

  • Patent number: 8027258
    Abstract: Communication time period measuring frames are simultaneously sent from an OAM adaptive device on a transmission side, to both a working path and a protection path. In an OAM adaptive device on a reception side, reception times of the frames having arrived from both the paths are checked so as to measure a time period difference between both the paths. The time period difference is fed back to a logic distance adjustment function of each PON section to determine required communication time periods of the PON sections respectively included in a working system and a protection system. Communication time periods of the working system and the protection system in a packet communication network are arbitrated in order to decrease a packet loss at line switching in a packet relaying network.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: September 27, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Mizutani, Yusuke Yajima, Takayuki Kanno, Takeshi Yasuda
  • Patent number: 7932177
    Abstract: A field-effect transistor is provided, which includes an organic thin film and which can realize a low threshold voltage while a stable, high field-effect mobility is ensured at the same time. In a field-effect transistor provided with a gate electrode, a source electrode, a drain electrode, a semiconductor film, a gate insulating film, and a substrate, the gate insulating film is formed from a plurality of insulating layers. Here, a first insulating layer in contact with the semiconductor film is formed from poly-p-xylylene formed into a film by a CVD method. A second insulating layer is formed from, for example, cyanoethylpullulan, and the dielectric constant is specified to be higher than that of the first insulating layer.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: April 26, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tomoaki Onoue, Takeshi Yasuda, Tetsuo Tsutsui
  • Publication number: 20110052229
    Abstract: An image forming apparatus includes an image carrier and a detection unit. The image carrier is stretched around a plurality of rolls. The detection unit detects a density of a toner image formed on the image carrier, based on an amount of regularly reflected light from a surface of the image carrier. A detection length where the detection unit performs the detection in a movement direction of the image carrier is longer than a length, in the movement direction of the image carrier, of a deformation area where a deformation of the image carrier is caused.
    Type: Application
    Filed: February 4, 2010
    Publication date: March 3, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shunichiro SHISHIKURA, Yasunori UNAGIDA, Naoya YAMASAKI, Takeshi YASUDA, Hidefumi TANAKA
  • Patent number: 7858880
    Abstract: The invention provides a welding method by resistance welding capable of adequately increasing a welding strength between two conductive terminals each made of copper, and a conductive terminal structure obtained by the method. A first conductive terminal made of a tinned flat copper plate is molded such that a step portion is formed at a position spaced away from a tip end position of the first conductive terminal and a projection is formed at a tip end portion ranging from the tip end position to the step portion. A second conductive terminal made of the aforementioned copper plate and the first conductive terminal are molded such that a weld surface of the second conductive terminal has a size to cover an entire weld surface of the projection of the first conductive terminal. Simultaneously, the respective conductive terminals are molded such that the tip end portion of the first conductive terminal becomes substantially equal in sectional area to a weld portion of the second conductive terminal.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: December 28, 2010
    Assignee: OMRON Corporation
    Inventors: Akihiko Nishioka, Takeshi Yasuda
  • Patent number: 7847201
    Abstract: In order to prevent rattling and avoid generation of chips at the time of assembly in a storage case for a power steering control unit of a vehicle, a storage case includes a base having a plate-shaped substrate member, and a box-shaped cover having an opening on the lower side and being mounted on the base so as to cover the upper surface of the substrate member, wherein rattling preventing projections are provided at a plurality of positions on the peripheral edge of the substrate member so as to come into abutment with an opening-side edge of the cover, which is positioned at a mounting position with respect to the base, from the outside; on the inner side of the rattling-preventing projections bevels are formed, which presses the opening-side edge to resiliently deform the peripheral wall of the cover inward and causes a reaction force to act in a direction in which the cover moves away from the substrate member and comes apart from the base; and the opening-side edge is formed with a crimping projection
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: December 7, 2010
    Assignee: Omron Automotive Electronics Co., Ltd.
    Inventors: Tetsuya Fukumoto, Toshio Saito, Kazushi Kadogaki, Takeshi Yasuda
  • Publication number: 20100012374
    Abstract: A welding method of conductive terminals for performing resistance welding on a first conductive terminal and a second conductive terminal includes bringing the first conductive terminal into contact with a projection formed on the second conductive terminal that projects in a direction orthogonal to a longitudinal direction of the terminal, joining a first electrode to the first conductive terminal by pressure welding, and joining a second electrode to the projection by pressure welding with the longitudinal direction of the first conductive terminal and the projecting direction of the projection orthogonal to each other, and flowing a current between each electrode to weld the first conductive terminal and the projection at a contacting surface thereof.
    Type: Application
    Filed: July 16, 2009
    Publication date: January 21, 2010
    Applicant: OMRON Corporation
    Inventors: Takeshi Yasuda, Akihiko Nishioka
  • Publication number: 20100002591
    Abstract: Communication time period measuring frames are simultaneously sent from an OAM adaptive device on a transmission side, to both a working path and a protection path. In an OAM adaptive device on a reception side, reception times of the frames having arrived from both the paths are checked so as to measure a time period difference between both the paths. The time period difference is fed back to a logic distance adjustment function of each PON section to determine required communication time periods of the PON sections respectively included in a working system and a protection system. Communication time periods of the working system and the protection system in a packet communication network are arbitrated in order to decrease a packet loss at line switching in a packet relaying network.
    Type: Application
    Filed: June 22, 2009
    Publication date: January 7, 2010
    Inventors: Masahiko MIZUTANI, Yusuke Yajima, Takayuki Kanno, Takeshi Yasuda
  • Patent number: 7632212
    Abstract: In the case of the on setting of an eco switch signal ESW, when a torque demand Tr* is less than a good fuel consumption-assuring minimum torque Temin, the hybrid vehicle of the invention stops the operation of an engine and controls a motor MG2 to output a required torque for constant speed drive. When the torque demand Tr* is not less than the good fuel consumption-assuring minimum torque Temin, on the other hand, the engine is driven at a drive point in a good fuel consumption range among drive points on an optimum fuel consumption operation curve to ensure output of the required torque for the constant speed drive. Such control enhances the fuel efficiency for the constant speed drive.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: December 15, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akihiro Yamanaka, Yukio Onishi, Takeshi Yasuda, Hideo Itano
  • Patent number: 7620074
    Abstract: A communication system is provided which allows synchronous devices in different synchronous communication networks to have synchronous communications with one another via an asynchronous communication network. In the communication system of the present invention, a master communication device generates a master clock based on a reference clock which is provided by a clock supplier. The master communication device sends a synchronization information frame, which contains information about the generated master clock, to plural slave communication devices via the asynchronous communication network. The slave communication devices each reproduce the master clock from the received synchronization information frame.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: November 17, 2009
    Assignee: Hitachi Communication Technologies, Ltd.
    Inventors: Takeshi Yasuda, Yoshihiro Ashi, Ken Mutou
  • Publication number: 20090159878
    Abstract: A thin film transistor comprising at least three terminals consisting of a gate electrode, a source electrode and a drain electrode; an insulator layer and an organic semiconductor layer on a substrate, which controls its electric current flowing between the source and the drain by applying a electric voltage across the gate electrode, wherein the organic semiconductor layer comprises a styryl derivative having a styryl structure expressed by C6H5—CH?CH—C6H5, or a distyryl structure expressed by C6H5—CH?CH—C6H5—CH?CH—C6H5 each without molecular weight distribution. The transistor has a fast response speed (driving speed), and further, achieves a large On/Off ratio getting an enhanced performance as a transistor.
    Type: Application
    Filed: February 18, 2009
    Publication date: June 25, 2009
    Applicants: Idemitsu Kosan Co., Ltd., KYUSYU UNIVERSITY
    Inventors: Hiroaki Nakamura, Masatoshi Saitou, Tetsuo Tsutsui, Takeshi Yasuda
  • Publication number: 20090140240
    Abstract: A thin film transistor comprising at least three terminals consisting of a gate electrode, a source electrode and a drain electrode; an insulator layer and an organic semiconductor layer on a substrate, which controls its electric current flowing between the source and the drain by applying a electric voltage across the gate electrode, wherein the organic semiconductor layer comprises a styryl derivative having a styryl structure expressed by C6H5—CH?CH—C6H5, or a distyryl structure expressed by C6H5—CH?CH—C6H5—CH?CH—C6H5 each without molecular weight distribution. The transistor has a fast response speed (driving speed), and further, achieves a large On/Off ratio getting an enhanced performance as a transistor.
    Type: Application
    Filed: December 11, 2008
    Publication date: June 4, 2009
    Applicants: Idemitsu Kosan Co., Ltd., KYUSYU UNIVERSITY
    Inventors: Hiroaki NAKAMURA, Masatoshi Saitou, Tetsuo Tsutsui, Takeshi Yasuda
  • Patent number: 7521710
    Abstract: A thin film transistor comprising at least three terminals consisting of a gate electrode, a source electrode and a drain electrode; an insulator layer and an organic semiconductor layer on a substrate, which controls its electric current flowing between the source and the drain by applying a electric voltage across the gate electrode, wherein the organic semiconductor layer comprises a styryl derivative having a styryl structure expressed by C6H5—CH?CH—C6H5, or a distyryl structure expressed by C6H5—CH?CH—C6H5—CH?CH—C6H5 each without molecular weight distribution. The transistor has a fast response speed (driving speed), and further, achieves a large On/Off ratio getting an enhanced performance as a transistor.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: April 21, 2009
    Assignees: Idemitsu Kosan Co., Ltd., Kyusyu University
    Inventors: Hiroaki Nakamura, Masatoshi Saitou, Tetsuo Tsutsui, Takeshi Yasuda
  • Publication number: 20090095954
    Abstract: A field-effect transistor is provided, which includes an organic thin film and which can realize a low threshold voltage while a stable, high field-effect mobility is ensured at the same time. In a field-effect transistor provided with a gate electrode, a source electrode, a drain electrode, a semiconductor film, a gate insulating film, and a substrate, the gate insulating film is formed from a plurality of insulating layers. Here, a first insulating layer in contact with the semiconductor film is formed from poly-p-xylylene formed into a film by a CVD method. A second insulating layer is formed from, for example, cyanoethylpullulan, and the dielectric constant is specified to be higher than that of the first insulating layer.
    Type: Application
    Filed: August 27, 2008
    Publication date: April 16, 2009
    Inventors: Tomoaki Onoue, Takeshi Yasuda, Tetsuo Tsutsui
  • Patent number: 7488184
    Abstract: To prevent lowering of connection reliability of soldering connection portions of electronic equipment, there is provided electronic equipment which is equipped with a connector electrically connected to an electric motor, a control board and a power module board to which the connectors and other electric parts are electrically connected by soldering, a base for supporting the boards and the connector while overlapped with the boards and cases for fixing the connector while the connector is exposed from an opening portion, and fixing the boards while the boards and the base are accommodated in the cases. The connector is supported by the base through a beam as a flexible metal piece.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: February 10, 2009
    Assignee: OMRON Corporation
    Inventors: Takeshi Yasuda, Atsushi Nagashima
  • Publication number: 20080124970
    Abstract: To prevent lowering of connection reliability of soldering connection portions of electronic equipment, there is provided electronic equipment which is equipped with a connector electrically connected to an electric motor, a control board and a power module board to which the connectors and other electric parts are electrically connected by soldering, a base for supporting the boards and the connector while overlapped with the boards and cases for fixing the connector while the connector is exposed from an opening portion, and fixing the boards while the boards and the base are accommodated in the cases. The connector is supported by the base through a beam as a flexible metal piece.
    Type: Application
    Filed: June 22, 2007
    Publication date: May 29, 2008
    Applicant: OMRON Corporation
    Inventors: Takeshi Yasuda, Atsushi Nagashima
  • Publication number: 20080102716
    Abstract: The invention provides a welding method by resistance welding capable of adequately increasing a welding strength between two conductive terminals each made of copper, and a conductive terminal structure obtained by the method. A first conductive terminal made of a tinned flat copper plate is molded such that a step portion is formed at a position spaced away from a tip end position of the first conductive terminal and a projection is formed at a tip end portion ranging from the tip end position to the step portion. A second conductive terminal made of the aforementioned copper plate and the first conductive terminal are molded such that a weld surface of the second conductive terminal has a size to cover an entire weld surface of the projection of the first conductive terminal. Simultaneously, the respective conductive terminals are molded such that the tip end portion of the first conductive terminal becomes substantially equal in sectional area to a weld portion of the second conductive terminal.
    Type: Application
    Filed: October 29, 2007
    Publication date: May 1, 2008
    Applicant: OMRON CORPORATION
    Inventors: Akihiko Nishioka, Takeshi Yasuda
  • Patent number: 7322916
    Abstract: The invention provides a tool magazine device for a vertical machining center having a protective cover for a shank. A tool magazine device 100 disposed in a vertical machining center comprises a chain 120 moved between sprocket wheels 130 and 140, and the chain 120 is equipped with tool holders 200. Each tool holder 200 has a tool holder member 220 for holding the shank portion of the tool 1 and a shank pod 230 for covering the shank portion. The automatic tool change preparation device 300 lifts the shank pod 230 by gripping a knob 250 of a shaft 240 connected to the shank pod 230, so as to enable an automatic tool change arm to change the tool 1.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: January 29, 2008
    Assignee: Yamazaki Mazak Corporation
    Inventors: Minoru Hazeyama, Takeshi Yasuda
  • Publication number: 20070298928
    Abstract: In the case of the on setting of an eco switch signal ESW, when a torque demand Tr* is less than a good fuel consumption-assuring minimum torque Temin, the hybrid vehicle of the invention stops the operation of an engine and controls a motor MG2 to output a required torque for constant speed drive. When the torque demand Tr* is not less than the good fuel consumption-assuring minimum torque Temin, on the other hand, the engine is driven at a drive point in a good fuel consumption range among drive points on an optimum fuel consumption operation curve to ensure output of the required torque for the constant speed drive. Such control enhances the fuel efficiency for the constant speed drive.
    Type: Application
    Filed: November 21, 2006
    Publication date: December 27, 2007
    Inventors: Akihiro Yamanaka, Yukio Onishi, Takeshi Yasuda, Hideo Itano
  • Publication number: 20070187674
    Abstract: A thin film transistor comprising at least three terminals consisting of a gate electrode, a source electrode and a drain electrode; an insulator layer and an organic semiconductor layer on a substrate, which controls its electric current flowing between the source and the drain by applying a electric voltage across the gate electrode, wherein the organic semiconductor layer comprises a styryl derivative having a styryl structure expressed by C6H5—CH?CH—C6H5, or a distyryl structure expressed by C6H5—CH?CH—C6H5—CH?CH—C6H5 each without molecular weight distribution. The transistor has a fast response speed (driving speed), and further, achieves a large On/Off ratio getting an enhanced performance as a transistor.
    Type: Application
    Filed: March 8, 2006
    Publication date: August 16, 2007
    Applicants: Idemitsu Kosan Co., Ltd., KYUSYU UNIVERSITY
    Inventors: Hiroaki Nakamura, Masatoshi Saitou, Tetsuo Tsutsui, Takeshi Yasuda
  • Patent number: 7225066
    Abstract: A support system comprises a support center 21 and a control measurement system 31 to be supported, which are connected via a computer network 28. The control measurement system 31 comprises means for collecting information which is available for support and when a predetermined condition holds, transmitting the collected information to the support center 21. The support center 21 comprises means for receiving the information transmitted from the control measurement system 31 and storing the received information. The information transmitted from the control measurement system 31 contains information concerning user's setting for the control measurement system 31.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: May 29, 2007
    Assignee: Fujitsu Ten Limited
    Inventor: Takeshi Yasuda