Patents by Inventor Hiroyuki Ikegami

Hiroyuki Ikegami 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: 20190199282
    Abstract: The present disclosure provides a technique capable of improving an SN ratio of a current signal which is superimposed on a power line in a photovoltaic string and transmitted and efficiently specifying a failure location. A current source 151 is connected to a power line 11 in parallel with each of photovoltaic elements 14. A controller 152 controls a current value of the current source 151 such that a current signal is generated. A bypass capacitor 153 is connected to the power line 11 to be parallel to the each of the photovoltaic elements 14 and the current source 151. Accordingly, the bypass capacitor 153 can transmit a current signal transmitted through the bypass capacitor 153 from a negative electrode side in a photovoltaic string to a positive electrode side.
    Type: Application
    Filed: June 28, 2017
    Publication date: June 27, 2019
    Applicant: THE UNIVERSITY OF TOKYO
    Inventors: Hideya OCHIAI, Hiroyuki IKEGAMI
  • Patent number: 10233942
    Abstract: A fluid device having a fluid machine and a rotary electric machine includes a fluid machine and a rotary electric machine connected to a rotating shaft of the fluid machine. A cooler is arranged for carrying out liquid-cooling using a fluid of a cooling pipe connecting an upstream portion and a downstream portion of the fluid machine to bypass the fluid machine. The fluid machine and the rotary electric machine are detachably coupled to each other. Hence, the rotary electric machine can enhance the cooling performance for the rotary electric machine and reduce its size, achieving improvements in maintainability and serviceability.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: March 19, 2019
    Assignee: Daikin Industries, Ltd.
    Inventors: Tomomi Sakamoto, Hiroyuki Ikegami, Atsushi Suhara, Yuzou Sawada
  • Publication number: 20180224276
    Abstract: A survey system including a movable photographing device, a surveying device, and an analysis device. The movable photographing device includes a camera mounted on a UAV and taking a plurality of images P for photogrammetry, and a GPS unit including a first time stamping portion stamping a first time Tc relating to a photographing time on the image P taken. The surveying device determines a position of the movable photographing device, and includes a second time stamping portion stamping a second time Tt relating to a surveying time on a survey result R determined above. The analysis device includes a photographing position analysis portion associating each survey result R with a photographing position of the respective image P based on the first time Tc and the second time Tt, and generating data for photogrammetry.
    Type: Application
    Filed: February 7, 2018
    Publication date: August 9, 2018
    Applicant: TOPCON CORPORATION
    Inventors: Nobuyuki NISHITA, Kazuki OSARAGI, Yasuhito HAIJIMA, You SASAKI, Hiroyuki IKEGAMI
  • Publication number: 20150369258
    Abstract: A fluid device having a fluid machine and a rotary electric machine includes a fluid machine and a rotary electric machine connected to a rotating shaft of the fluid machine. A cooler is arranged for carrying out liquid-cooling using a fluid of a cooling pipe connecting an upstream portion and a downstream portion of the fluid machine to bypass the fluid machine. The fluid machine and the rotary electric machine are detachably coupled to each other. Hence, the rotary electric machine can enhance the cooling performance for the rotary electric machine and reduce its size, achieving improvements in maintainability and serviceability.
    Type: Application
    Filed: November 20, 2013
    Publication date: December 24, 2015
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tomomi SAKAMOTO, Hiroyuki IKEGAMI, Atsushi SUHARA, Yuzou SAWADA
  • Patent number: 6816828
    Abstract: In a logic simulation method, one of an algorithm level simulation and a register transfer level simulation is executed. The algorithm level simulation corresponds to an algorithm level description and the register transfer level simulation corresponds to a register transfer level description. The simulation is switched from one of the algorithm level simulation and the register transfer level simulation into the other in response to a switching instruction using a relation between states of the algorithm level description and states of the register transfer level description. The algorithm level description is associated with arithmetic and logic algorithm and not associated with logic circuits. The register transfer level description is associated with logic circuits.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: November 9, 2004
    Assignee: NEC Electronics Corporation
    Inventor: Hiroyuki Ikegami
  • Patent number: 6782354
    Abstract: A simulation system includes a display, a model producing section and a first simulator. The model producing section produces a clock level simulation model and a first table from an algorithm description model and model interface data indicative of input and output of variables related to the algorithm description model. The clock level simulation model is used for simulating operations of resources in units of groups of allowable status transitions of the variables under constraint condition of the resources. The first table indicating correspondence relationship between the variables and the resources in units of status positions. The first simulator carries out the simulation of the algorithm description model to output variable values in each of the status positions.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: August 24, 2004
    Assignee: NEC Electronics Corporation
    Inventor: Hiroyuki Ikegami
  • Patent number: 6596863
    Abstract: Process for producing a nitroetheneamine derivative or its stereoisomer, its tautomer or a salt thereof comprising reacting a compound of the formula with a compound of the formula R6—CH2NO2 to obtain a compound of the formula and reacting the resulting compound with a compound of the formula
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: July 22, 2003
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Fuminori Kato, Keizo Miyata, Hirohiko Kimura, Kazuhiro Yamamoto, Hiroyuki Ikegami, Hiromi Takeo
  • Publication number: 20020198184
    Abstract: The present invention provides a medical composition containing, as an active constituent, a nitroetheneamine derivative represented by the formula (I): 1
    Type: Application
    Filed: April 29, 2002
    Publication date: December 26, 2002
    Applicant: ISHIHARA SANGYO KAISHA LTD.
    Inventors: Fuminori Kato, Keizo Miyata, Hirohiko Kimura, Kazuhiro Yamamoto, Hiroyuki Ikegami, Hiromi Takeo
  • Patent number: 6451792
    Abstract: A medical composition containing, as an active constituent, a nitroetheneamine derivative represented by the formula (I): wherein the substituents are as defined in the disclosure, its stereoisomers, its tautomers or a salt thereof.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: September 17, 2002
    Assignee: Ishihara Sangyo Kaisha Ltd.
    Inventors: Fuminori Kato, Keizo Miyata, Hirohiko Kimura, Kazuhiro Yamamoto, Hiroyuki Ikegami, Hiromi Takeo
  • Patent number: 6377909
    Abstract: When a logic synthesis of verified logic circuits is executed by a logic synthesis section, respective input variables, main terms, a minimum logical-OR form, and a cover condition of a logical expression are retained as reusable elements. In an optimization of a program code executed by a dedicated compiler, the program code is optimized by using the reusable elements. Thus, the processing time for the optimization of the program code can be shortened, and also, the amount of memory being used can be reduced.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: April 23, 2002
    Assignee: NEC Corporation
    Inventor: Hiroyuki Ikegami
  • Patent number: 6115009
    Abstract: A display device using a video signal counter system in its automatic positioning and centering circuit. The display device receives a video signal (e.g., from a host computer) including red, green, blue (RGB) color signals and synchronization signals. The present invention advantageously utilizes a video signal counter circuit which is located proximate to, and on the same integrated circuit PC board as, the video receiver circuit of the display device to increase the accuracy of automatic centering and sizing computations. The video signal counter circuit compares horizontal and vertical synchronization signals to the start of the picture edge as determined by the RGB signals. The video signal counter circuit communicates over a transmission line (e.g., serial line) to a processor unit located on another integrated circuit PC board.
    Type: Grant
    Filed: June 16, 1998
    Date of Patent: September 5, 2000
    Assignees: Sony Corporation of Japan, Sony Electronics, Inc.
    Inventor: Hiroyuki Ikegami
  • Patent number: 5990581
    Abstract: A method and system for allowing a power supply circuit to limit inrush current and to use a small current specification switch. The power supply circuit comprises a transformer that receives a power signal from a primary circuit and supplies power of a selected voltage to a secondary circuit, to which a load is coupled. The primary circuit comprises a rectifier for providing a rectified power signal to the transformer, a power supply controller for controlling the transformer, and a small current specification switch coupled between a kick resistor and the power supply controller, where the kick resistor functions to activate the power supply controller when the circuit is first turned on.
    Type: Grant
    Filed: July 31, 1998
    Date of Patent: November 23, 1999
    Assignees: Sony Corporation of Japan, Sony Electronics, Inc.
    Inventors: Hiroyuki Ikegami, Toshiro Kawata
  • Patent number: 5892544
    Abstract: The present invention relates to a beam current control system for detecting and controlling a beam current generated by a cathode ray tube. The system comprises a video processing circuit that receives a first signal, and which generates a second signal that includes a video signal and a synchronization signal, which is provided to the cathode ray tube. The cathode ray tube generates a beam current corresponding to the second signal, where the beam current has a video signal portion and a synchronization signal portion. A storage element coupled between the video processing circuit and the cathode ray tube clamps the second signal at a first predetermined level, and stores an electrical charge corresponding to the video signal portion of the beam current during a first time interval.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: April 6, 1999
    Assignees: Sony Electronics, Inc., Sony Corporation
    Inventors: Hiroyuki Ikegami, Taro Tadano
  • Patent number: 5614792
    Abstract: A dynamic focus circuit used in a display device having a cathode ray tube and adapted for controlling convergence of an electron beam of the cathode ray tube. In the dynamic focus circuit, a horizontal deflection circuit generates a saw-tooth-wave current and a flyback transformer generates a high voltage for accelerating an electron beam. An orthogonal transformer receives a signal corresponding to the saw-tooth-wave current through a primary winding via the flyback transformer while receiving a control signal of a control circuit through a control winding and generates a dynamic focus voltage through a secondary winding. A capacitor supplies the dynamic focus voltage to a cathode ray tube. Thus, it is possible to produce a device of compact structure and to generate a satisfactory dynamic focus voltage.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: March 25, 1997
    Assignee: Sony Corporation
    Inventors: Kiyoshi Ogishima, Hiroyuki Ikegami
  • Patent number: 4909295
    Abstract: Disclosed is a vehicle tire structure in which a tubeless pneumatic tire is fitted over a wheel, characterized in that: at least a pair of walls project in substantially radial direction from an outer circumferential surface of the wheel into an annular chamber defined between the tire and the wheel. These walls prevents the generation of standing waves or the air column resonace inside the tire and contribute to the overall reduction of the road noise of the vehicle. The proximal ends of the walls may be either bonded to an annular member which surrounds the wheel or pivoted to a similar annular member and biased into radial or upright positions by a spring member, in such a manner as not to interfere with the replacement of the tire. Alternatively, the walls may consist of inflatable bags which may be inflated into upright positions and deflated into flat positions.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: March 20, 1990
    Assignee: Honda Giken Kogyo Kabushike Kaisha
    Inventors: Toru Nirei, Hiroyuki Ikegami, Yuichi Yoshimura
  • Patent number: 4896921
    Abstract: The wheel of the present invention reduces road noise without using a special tire. The wheel includes a wheel body and a silencing chamber formed around the wheel body. The silencing chamber communicates with an air chamber in the tire via communication port. The phase difference between a compressional wave in the air chamber and a compressional wave returned to the air chamber from the communication port cause attenuation of the road noise.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: January 30, 1990
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Chiharu Sato, Yoichi Kamiyama, Hiroyuki Ikegami