Patents by Inventor Kazuo Takahashi

Kazuo Takahashi 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: 11066961
    Abstract: An exhaust heat recovery system includes an evaporator, an expander, a condenser, a pump, a circulation flow path, a cooling medium pipe, a bypass pipe, a first valve, a second valve for switching between a state in which the working medium can flow into the coolie medium piping and a state in which the working medium cannot flow therein, and a controller for performing the switching control of the valves. When a condition under which the temperature of the working medium flowing into the condenser becomes higher than or equal to a predetermined temperature is satisfied, the controller controls the second valve to switch to the state in which the working medium can flow into the cooling medium pipe.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: July 20, 2021
    Assignee: Kobe Steel, Ltd.
    Inventors: Kazuo Takahashi, Shigeto Adachi, Yutaka Narukawa, Kazumasa Nishimura
  • Publication number: 20210215052
    Abstract: A turbine impeller includes: a base material which contains aluminum as a main element; and an anti-erosion coating which covers a surface of the base material. Accordingly, since liquid droplets hit the anti-erosion coating before the base material even when the liquid droplets flow into the rotating turbine impeller, the damage to the base material due to erosion is suppressed.
    Type: Application
    Filed: June 6, 2019
    Publication date: July 15, 2021
    Applicant: IHI Corporation
    Inventors: Yoshimitsu MATSUYAMA, Yukio TAKAHASHI, Atsushi HIRATA, Kazuo MIYOSHI, Kenichi TAKAHASHI, Daisuke WADA, Yasuhiro RAI
  • Patent number: 10996127
    Abstract: A pressure detection device includes: a piezoelectric element that detects a pressure change via a diaphragm head or the like; a circuit board that is provided with a processing circuit that performs electrical processing with respect to a charge signal outputted from the piezoelectric element; a conductive housing member, which has conductivity and is disposed to cover (house) the circuit board, and which is connected to the ground of the circuit board; and a housing (a leading end side housing, the diaphragm head and a rear end side housing), which houses the piezoelectric element, the circuit board and the housing member, and which is electrically insulated from the piezoelectric element, the circuit board and the housing member.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: May 4, 2021
    Assignees: CITIZEN FINEDEVICE CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Yuta Kanamori, Masanori Yomoyama, Tetsuya Aiba, Ikuo Takahashi, Hiroshi Nakagawa, Kazuo Takahashi, Yusuke Satoh
  • Publication number: 20200400079
    Abstract: A control device for a two-shaft gas turbine power generation facility includes: a basic output calculation unit which obtains a basic output command value in accordance with a required output; a component separation unit which divides the basic output command value into high and low frequency components; an opening degree command output unit which obtains an opening degree of a fuel adjustment valve and outputs an opening degree command to the fuel adjustment valve; a basic power transmission and reception amount calculation unit which obtains a basic power transmission and reception amount of the electric power between an induction motor and a power system on the basis of the high-frequency component; and a power transmission and reception command output unit which outputs a power transmission and reception command indicating a power transmission and reception amount in accordance with the basic power transmission and reception amount to a frequency converter.
    Type: Application
    Filed: February 22, 2019
    Publication date: December 24, 2020
    Inventors: Kazuo TAKAHASHI, Naoyuki NAGAFUCHI
  • Patent number: 10851678
    Abstract: A thermal energy recovery device includes a circulation flow path for circulating a working fluid, a thermal fluid circulation flow path for circulating hot water, an evaporator for evaporating the working fluid flowing in the circulation flow path by heat of the hot water flowing in the thermal fluid circulation flow path, a preheater for heating the working fluid before flowing into the evaporator by the heat of the hot water flowing in the thermal fluid circulation flow path, and a control unit for controlling a startup operation of the thermal energy recovery device. The control unit executes a suppression control for suppressing a temperature difference between the hot water and the working fluid in the preheater.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: December 1, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Kazuo Takahashi, Haruyuki Matsuda, Shigeto Adachi
  • Patent number: 10794160
    Abstract: A geothermal heat recovery device includes a circulation flow path provided with a circulation pump, a heat medium pressurized by the circulation pump circulating through the circulation flow path in a hot liquid state; a heat exchanger installed underground and configured to heat the heat medium flowing through the circulation flow path with underground heat; a binary electricity generation device configured to recover, as electrical energy, thermal energy from the heat medium heated in the heat exchanger; a bypass path connected to the circulation flow path; and an adjustment mechanism configured to adjust a flow division ratio between a flow rate of the heat medium flowing into the heat exchanger and a flow rate of the heat medium bypassing the heat exchanger through the bypass path.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: October 6, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Kazuo Takahashi, Shigeto Adachi
  • Patent number: 10794229
    Abstract: A binary cycle power generation system includes a working fluid circulation line, an evaporator, an expander, an energy recovery apparatus, a condenser, and a pump. The pump includes a casing, a rotary shaft, and impellers. The casing is hollow and has an end wall at an end in a longitudinal direction. The rotary shaft has an axis extending in the longitudinal direction of the casing, is supported on the end wall, has at least a part that is in the casing, and rotates owing to a torque. The impellers are attached to the rotary shaft one after another in the longitudinal direction. The pump is arranged in such a way that the axis of the rotary shaft intersects a vertical direction.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: October 6, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Kazuo Takahashi, Yuji Tanaka, Shigeto Adachi, Yutaka Narukawa, Kazumasa Nishimura
  • Publication number: 20200291600
    Abstract: A boom includes a body and a base end bracket. The body includes a straight section and a wide section. When viewed from above, a width of the straight section is substantially constant. When viewed from above, a width of the wide section increases toward the base end bracket. The straight section and the wide section are smoothly continuous to each other.
    Type: Application
    Filed: September 28, 2017
    Publication date: September 17, 2020
    Inventors: Nobuyasu SUGIHARA, Yuki NAKATANI, Shinpei UTOU, Kouji SHINKAWA, Satoru KUBOTA, Shuhei WATANABE, Tooru TSUJI, Kazuo TAKAHASHI, Kenji SANADA
  • Patent number: 10775168
    Abstract: Provided is a sensor device that includes a vibrator unit, an annular base portion, a plurality of coupling portions, and a wiring layer. The wiring layer includes a plurality of drive wirings and a plurality of detection wirings. The plurality of drive wirings are respectively connected to first and second drive electrodes while being adjacent and parallel to one another. The plurality of detection wirings are respectively connected to first and second detection electrodes while being adjacent and parallel to one another. The wiring layer is provided at each of the plurality of coupling portions to electrically connect a plurality of terminal portions provided in the base portion with a plurality of piezoelectric drive units and first and second piezoelectric detection units provided in the vibrator unit.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: September 15, 2020
    Assignee: SONY CORPORATION
    Inventors: Satoshi Mitani, Hidetoshi Kabasawa, Kazuo Takahashi, Hideo Niikura
  • Patent number: 10724917
    Abstract: A pressure detection device includes: a cylindrical body made of a conductor; a pressure receiver made of a conductor, the pressure receiver being mounted to one end side of the body and receiving pressure from the outside; a signal generator arranged inside the body, the signal generator being electrically connected to the pressure receiver and generating a signal corresponding to the pressure received by the pressure receiver; and a cover made of an insulator with a lower thermal conductivity than thermal conductivities of the body and the pressure receiver, the cover continuously covering an outer surface of the pressure receiver and a portion of an outer surface of the body, the portion being located at a side closer to the pressure receiver.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: July 28, 2020
    Assignees: CITIZEN FINEDEVICE CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, CITIZEN WATCH CO., LTD.
    Inventors: Yusuke Satoh, Kazuo Takahashi, Aki Sudo, Keisuke Sasaki, Masakatsu Nagai
  • Patent number: 10711993
    Abstract: An exhaust heat recovery device includes: a main passage through which an exhaust gas containing a corrosive component flows; a boiler which heats a heat medium using the exhaust gas; a bypass passage connected to the main passage so as to detour around the boiler; a regulation valve member which regulates a flow rate of the exhaust gas flowing into the boiler; a heat medium circuit which circulates the heat medium that is heated to be in a hot-water state by the boiler; a binary electricity generation device which recovers thermal energy from the heat medium in the heat medium circuit and generates electricity; and a valve control unit which controls an opening of the regulation valve member such that a temperature of the exhaust gas passed through the boiler is equal to or higher than a temperature of an acid dew-point of the corrosive component in the exhaust gas.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: July 14, 2020
    Assignee: Kobe Steel, Ltd.
    Inventor: Kazuo Takahashi
  • Patent number: 10637341
    Abstract: A two-shaft gas turbine facility includes a two-shaft gas turbine, an induction motor connected to a compressor of the two-shaft gas turbine, a secondary battery, a first frequency converter that controls power transmission and reception between a power system and the induction motor, and a second frequency converter that controls charging and discharging of power between the secondary battery and the power system. A first control unit of a control device causes power transmission and reception to be performed between the induction motor and the power system by the first frequency converter if a required output change rate is higher than a maximum output change rate. A second control unit causes the secondary battery to be charged and discharged by the second frequency converter if power to be transmitted to and received from the induction motor has reached maximum allowable power.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: April 28, 2020
    Assignee: MITSUBISHI POWER SYSTEMS, LTD.
    Inventors: Naoyuki Nagafuchi, Toshimitsu Morimoto, Kazuo Takahashi, Atsushi Tsutsumi
  • Publication number: 20190383176
    Abstract: A binary cycle power generation system includes a working fluid circulation line, an evaporator, an expander, an energy recovery apparatus, a condenser, and a pump. The pump includes a casing, a rotary shaft, and impellers. The casing is hollow and has an end wall at an end in a longitudinal direction. The rotary shaft has an axis extending in the longitudinal direction of the casing, is supported on the end wall, has at least a part that is in the casing, and rotates owing to a torque. The impellers are attached to the rotary shaft one after another in the longitudinal direction. The pump is arranged in such a way that the axis of the rotary shaft intersects a vertical direction.
    Type: Application
    Filed: January 18, 2018
    Publication date: December 19, 2019
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Kazuo TAKAHASHI, Yuji TANAKA, Shigeto ADACHI, Yutaka NARUKAWA, Kazumasa NISHIMURA
  • Publication number: 20190383177
    Abstract: A thermal energy recovery device includes a circulation flow path for circulating a working fluid, a thermal fluid circulation flow path for circulating hot water, an evaporator for evaporating the working fluid flowing in the circulation flow path by heat of the hot water flowing in the thermal fluid circulation flow path, a preheater for heating the working fluid before flowing into the evaporator by the heat of the hot water flowing in the thermal fluid circulation flow path, and a control unit for controlling a startup operation of the thermal energy recovery device. The control unit executes a suppression control for suppressing a temperature difference between the hot water and the working fluid in the preheater.
    Type: Application
    Filed: November 15, 2017
    Publication date: December 19, 2019
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Kazuo TAKAHASHI, Haruyuki MATSUDA, Shigeto ADACHI
  • Patent number: 10458328
    Abstract: A combustion pressure sensor has a case member with a joint surface on the side of a tip end and in which an opening portion is provided. A joint surface of a pressure reception member on which a combustion pressure acts is brought into planar contact with the joint surface of the case member so as to block the opening portion. A welding portion joins the joint surfaces to each other. A piezoelectric element stored in the case member converts a pressing force based on the combustion pressure transmitted from the pressure reception member into a signal. On the side of one edge side in at least the one joint surface, the one joint surface is limited to a given depth of welding from the other edge side. A predetermined clearance portion is provided so as to form a predetermined gap with the opposite joint surface and a welding portion is provided which includes at least all the limited joint surface from the other edge side in the one joint surface.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: October 29, 2019
    Assignees: CITIZEN FINEDEVICE CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Kazuo Takahashi, Yoshihiko Soga
  • Publication number: 20190310086
    Abstract: A gyrosensor according to an embodiment of the present technology includes an oscillator and a controller. The oscillator includes an oscillator body and a detection part. The detection part is provided on the oscillator body, and outputs a detection signal including angular velocity information. The controller includes an angular-velocity detection circuit and a correction circuit. The angular-velocity detection circuit detects the detection signal in synchronization with a first timing signal. The correction circuit detects the detection signal in synchronization with a second timing signal and generates a correction signal for correcting driving of the oscillator, the second timing signal having a phase different from a phase of the first timing signal.
    Type: Application
    Filed: May 30, 2017
    Publication date: October 10, 2019
    Inventors: KAZUO TAKAHASHI, KUNIHIKO MORI
  • Publication number: 20190280583
    Abstract: A two-shaft gas turbine facility includes a two-shaft gas turbine, an induction motor connected to a compressor of the two-shaft gas turbine, a secondary battery, a first frequency converter that controls power transmission and reception between a power system and the induction motor, and a second frequency converter that controls charging and discharging of power between the secondary battery and the power system. A first control unit of a control device causes power transmission and reception to be performed between the induction motor and the power system by the first frequency converter if a required output change rate is higher than a maximum output change rate. A second control unit causes the secondary battery to be charged and discharged by the second frequency converter if power to be transmitted to and received from the induction motor has reached maximum allowable power.
    Type: Application
    Filed: July 21, 2017
    Publication date: September 12, 2019
    Inventors: Naoyuki NAGAFUCHI, Toshimitsu MORIMOTO, Kazuo TAKAHASHI, Atsushi TSUTSUMI
  • Patent number: 10408092
    Abstract: A heat exchanger is for use in an energy recovery system to be mounted on a vessel including an engine, a supercharger and an economizer, the heat exchanger including: a first heat section for heating a working medium by supercharged air from the supercharger; a second heat section for heating the supercharged air by steam generated by the economizer before the supercharged air flows into the first heat section; and a third heat section for heating the working medium having been heated in the first section by the supercharged air which is to be heated in the second section.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: September 10, 2019
    Assignees: Kobe Steel, Ltd., ASAHI SHIPPING CO., LTD., TSUNEISHI SHIPBUILDING CO., LTD., MIURA CO., LTD.
    Inventors: Shigeto Adachi, Kazuo Takahashi, Tetsuro Fujii, Kazuya Arahira, Masakazu Yamamoto, Yutaka Kobayashi, Toshio Sageshima
  • Publication number: 20190264906
    Abstract: An exhaust heat recovery device includes: a main passage through which an exhaust gas containing a corrosive component flows; a boiler which heats a heat medium using the exhaust gas; a bypass passage connected to the main passage so as to detour around the boiler; a regulation valve member which regulates a flow rate of the exhaust gas flowing into the boiler; a heat medium circuit which circulates the heat medium that is heated to be in a hot-water state by the boiler; a binary electricity generation device which recovers thermal energy from the heat medium in the heat medium circuit and generates electricity; and a valve control unit which controls an opening of the regulation valve member such that a temperature of the exhaust gas passed through the boiler is equal to or higher than a temperature of an acid dew-point of the corrosive component in the exhaust gas.
    Type: Application
    Filed: January 25, 2017
    Publication date: August 29, 2019
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventor: Kazuo TAKAHASHI
  • Publication number: 20190234190
    Abstract: A geothermal heat recovery device includes a circulation flow path provided with a circulation pump, a heat medium pressurized by the circulation pump circulating through the circulation flow path in a hot liquid state; a heat exchanger installed underground and configured to heat the heat medium flowing through the circulation flow path with underground heat; a binary electricity generation device configured to recover, as electrical energy, thermal energy from the heat medium heated in the heat exchanger; a bypass path connected to the circulation flow path; and an adjustment mechanism configured to adjust a flow division ratio between a flow rate of the heat medium flowing into the heat exchanger and a flow rate of the heat medium bypassing the heat exchanger through the bypass path.
    Type: Application
    Filed: January 25, 2017
    Publication date: August 1, 2019
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Kazuo TAKAHASHI, Shigeto ADACHI