Patents by Inventor Hajime Nakamura

Hajime Nakamura 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: 20240101804
    Abstract: This bolus, which is for radiation therapy, can be deformed to match the shape of a human body surface, and has little deformation during therapy. The bolus forming material is a rubber composition containing ethylene-propylene rubber and a temperature-sensitive material. The bolus forming material has a JIS type A hardness of 20 or higher at 30° C., and thus is not susceptible to deformation. The bolus forming material has a JIS type E hardness of 10 to 60 at 70° C., and thus easily deforms. The bolus forming material shifts the peak of the percentage depth dose for electron beams and X-rays in the beam source direction at 0.8 to 1.2 times the thickness thereof. Therefore, the bolus forming material has dose characteristics in the depth direction that are substantially the same as a human body. After a sheet of the bolus forming material is heated to around 70° C., the sheet deforms.
    Type: Application
    Filed: February 3, 2022
    Publication date: March 28, 2024
    Applicants: HAYAKAWA RUBBER CO., LTD., KINKI UNIVERSITY
    Inventors: Hajime MONZEN, Mikoto TAMURA, Yoshito KADOWAKI, Masashi NAKAMURA, Masafumi SHIGITA
  • Publication number: 20240083112
    Abstract: A three-dimensional object printing apparatus includes: a head unit including a head that ejects a liquid toward a three-dimensional workpiece along a Z axis; a sensor unit including a sensor that detects a positional relationship with respect to the workpiece; and a movement mechanism that change positions of the head unit and the sensor unit with respect to the workpiece, in which the movement mechanism includes a first Z-axis movement mechanism that changes the position of the sensor unit with respect to the workpiece along the Z axis, and a second Z-axis movement mechanism that changes the position of the head unit with respect to the workpiece along the Z axis, and the first Z-axis movement mechanism and the second Z-axis movement mechanism move the sensor unit and the head unit independently of each other.
    Type: Application
    Filed: September 6, 2023
    Publication date: March 14, 2024
    Inventors: Shinichi NAKAMURA, Keigo SUGAI, Hajime KOBAYASHI
  • Publication number: 20240077068
    Abstract: A gas cooler includes a drain recovery part, a drain discharge flow path, a drain tank, and a ventilation flow path. In the drain recovery part, drain separated from gas is accumulated by cooling the gas in a cooling part. The drain tank includes a separation part in which the drain and the gas are separated, and a storage part in which the separated drain is stored. The drain discharge flow path has one end communicating with the drain recovery part and the other end communicating with the separation part. The ventilation flow path has one end communicating with the separation part, and the other end communicating with a gas flow path that leads to a downstream space above the drain recovery part and to a gas lead-out port.
    Type: Application
    Filed: January 13, 2022
    Publication date: March 7, 2024
    Applicant: KOBELCO COMPRESSORS CORPORATION
    Inventors: Noboru TSUBOI, Hajime NAKAMURA, Junichiro TOTSUKA, Kazuya HIRATA
  • Publication number: 20230405670
    Abstract: Provided is a magnetic refrigeration material whose magnetic transition temperature has been adjusted with high accuracy and which includes at least a first predetermined magnetic refrigeration material and a second predetermined magnetic refrigeration material which differs from the first magnetic refrigeration material. The absolute value of the difference between the magnetic transition temperature of the present magnetic refrigeration material and a target magnetic transition temperature is 0.7 K or less. The content of the first magnetic refrigeration material and the content of the second magnetic refrigeration material are determined by the magnetic transition temperatures of the first magnetic refrigeration material and the second magnetic refrigeration material and by a target magnetic transition temperature of the magnetic refrigeration material.
    Type: Application
    Filed: September 5, 2023
    Publication date: December 21, 2023
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Junya FUKUDA, Tetsuya KUME, Koichi HIROTA, Hajime NAKAMURA
  • Patent number: 11806782
    Abstract: There are provided a method for producing a magnetic refrigeration material whose magnetic transition temperature can be adjusted with high accuracy, and a magnetic refrigeration material whose magnetic transition temperature has been adjusted with high accuracy. The magnetic refrigeration material production method of the present invention includes the steps of: preparing a first predetermined magnetic refrigeration material and a second predetermined magnetic refrigeration material which differs from the first magnetic refrigeration material; and mixing the first magnetic refrigeration material and the second magnetic refrigeration material to obtain a third magnetic refrigeration material.
    Type: Grant
    Filed: February 23, 2023
    Date of Patent: November 7, 2023
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Junya Fukuda, Tetsuya Kume, Koichi Hirota, Hajime Nakamura
  • Patent number: 11798716
    Abstract: Provided is a rare earth sintered magnet in which a multi-layer main phase particle having multiple layers including a layer 1 having R2 concentration, represented by at %, higher than that of a center of the particle, a layer 2 which is formed on the outside of the layer 1 and has R2 concentration lower than that of the layer 1, and a layer 3 which is formed on the outside of the layer 2 and has R2 concentration higher than that of the layer 2 is present at least in a portion in the vicinity of a surface of the main phase particle within at least 500 ?m from a surface of the sintered magnet body.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: October 24, 2023
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Tetsuya Ohashi, Hiroki Iida, Koichi Hirota, Hajime Nakamura, Mikio Yoshida, Kazuya Fukui, Michihiro Oida
  • Publication number: 20230314311
    Abstract: A laser gas analyzer includes: a laser diode that irradiates a measurement target gas with laser light; a photodiode that receives the laser light that has passed through the measurement target gas; a processor that calculates a concentration of a component contained in the measurement target gas based on an amount of light of the laser light received by the photodiode; and a light emitting diode (LED) that irradiates LED light such that the LED light is received by the photodiode without passing through the measurement target gas.
    Type: Application
    Filed: April 5, 2023
    Publication date: October 5, 2023
    Applicant: Yokogawa Electric Corporation
    Inventor: Hajime Nakamura
  • Publication number: 20230302532
    Abstract: There are provided a method for producing a magnetic refrigeration material whose magnetic transition temperature can be adjusted with high accuracy, and a magnetic refrigeration material whose magnetic transition temperature has been adjusted with high accuracy. The magnetic refrigeration material production method of the present invention includes the steps of: preparing a first predetermined magnetic refrigeration material and a second predetermined magnetic refrigeration material which differs from the first magnetic refrigeration material; and mixing the first magnetic refrigeration material and the second magnetic refrigeration material to obtain a third magnetic refrigeration material.
    Type: Application
    Filed: February 23, 2023
    Publication date: September 28, 2023
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Junya FUKUDA, Tetsuya KUME, Koichi HIROTA, Hajime NAKAMURA
  • Patent number: 11600413
    Abstract: R—Fe—B sintered magnet has a main phase containing R2(Fe,(Co))14B intermetallic compound and a grain boundary phase. The inter-particle grain boundary includes an expanded width part that is surrounded by a narrow width part at which the inter-particle width is 10 nm or less and that has a structure distended in the inter-particle width direction as compared with the grain boundary width of the narrow width part; the inter-particle width at the expanded width part is at least 30 nm; Fe/R ratio in the expanded width part is 0.01-2.5; the main phase includes, in the surface part thereof, an HR-rich phase represented by (R?,HR)2(Fe,(Co))14B (R? represents rare-earth elements excluding Dy, Tb, and Ho, and that essentially include Nd; and HR represents Dy, Tb, and Ho); the contained amount of HR in the HR-rich phase is higher than that in the central part of the main phase.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: March 7, 2023
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Tetsuya Ohashi, Koichi Hirota, Hajime Nakamura
  • Patent number: 11525751
    Abstract: A sensor drive circuit for driving a sensor with a current includes at least one circuit configured to generate a drive current for the sensor, the drive current having a reverse temperature characteristic with respect to a temperature characteristic of an output voltage of the sensor. A temperature characteristic of sensor sensitivity has a negative first order coefficient and a positive second order coefficient. The sensor drive circuit includes a first current source configured to generate a first current having a temperature characteristic of which a first order coefficient is positive. The sensor drive circuit includes a second current source configured to generate a second current having a temperature characteristic of which a first order coefficient is negative. The sensor drive circuit includes a first current calculator configured to add the first current and the second current to generate a third current.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: December 13, 2022
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventor: Hajime Nakamura
  • Publication number: 20220344080
    Abstract: According to the present invention, a method for manufacturing a rare earth magnet that is capable of manufacturing a high-performance rare earth magnet with stable quality in large amount by the grain boundary diffusion method utilizing a film formed by the physical vapor phase deposition method is provided.
    Type: Application
    Filed: August 27, 2020
    Publication date: October 27, 2022
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hajime NAKAMURA, Koichi HIROTA, Tetsuya OHASHI
  • Publication number: 20220279735
    Abstract: Provided is an activator for a growth medium used for artificial cultivation of mushrooms, and the activator is used in a growth medium for mushroom artificial cultivation and improves and stabilizes the yield. The activator for a mushroom growth medium includes, as antacid inorganic substances, aluminum, calcium, and magnesium. By changing the proportion of each element, the neutralization function is adjusted. By adding a small amount of the activator, an optimum cultivation pH for an intended type of mushroom is achieved, and the optimum cultivation pH can be maintained.
    Type: Application
    Filed: July 13, 2020
    Publication date: September 8, 2022
    Applicant: KYOWA CHEMICAL INDUSTRY CO., LTD.
    Inventors: Hajime Nakamura, Hikaru Ando
  • Patent number: 11410805
    Abstract: An R—Fe—B base sintered magnet is provided comprising a main phase containing an HR rich phase of (R?,HR)2(Fe,(Co))14B wherein R? is an element selected from yttrium and rare earth elements exclusive of Dy, Tb and Ho, and essentially contains Nd, and HR is an element selected from Dy, Tb and Ho, and a grain boundary phase containing a (R?,HR)—Fe(Co)-M1 phase in the form of an amorphous phase and/or nanocrystalline phase, the (R?,HR)—Fe(Co)-M1 phase consisting essentially of 25-35 at % of (R?,HR), 2-8 at % of M1 which is at least one element selected from Si, Al, Mn, Ni, Cu, Zn, Ga, Ge, Pd, Ag, Cd, In, Sn, Sb, Pt, Au, Hg, Pb, and Bi, up to 8 at % of Co, and the balance of Fe. The HR rich phase has a higher HR content than the HR content of the main phase at its center. The magnet produces a high coercivity despite a low content of Dy, Tb and Ho.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: August 9, 2022
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tetsuya Ohashi, Tetsuya Kume, Koichi Hirota, Hajime Nakamura
  • Publication number: 20220227129
    Abstract: A drive circuit of a recording head having a recording element is provided. The drive circuit supplies a load element for recording operation of the recording element with an output signal of electric power according to operation of the load element. The drive circuit includes a voltage amplifier that amplifies a voltage of an analog drive waveform signal for operation of the recording element to generate a drive voltage signal. The voltage amplifier includes amplifiers. Among the amplifiers, at least one of subsequent-stage amplifiers which are a second and subsequent amplifiers from an upstream side includes a signal feedback unit that returns a signal to be output to an input side of the subsequent-stage amplifiers.
    Type: Application
    Filed: June 17, 2019
    Publication date: July 21, 2022
    Inventors: Shinichi KAWAGUCHI, Hajime NAKAMURA
  • Patent number: 11243116
    Abstract: A spectrometry device includes a controller that: causes first irradiated light and second irradiated light to be irradiated from a first light emitter and a second light emitter at mutually different timings; stores information relating to a first light reception signal and information relating to a second light reception signal in a storage at mutually different timings, in synchronization with irradiation timings of the first irradiation light and the second irradiation light; acquires information relating to a first optical spectrum based on the information relating to the first light reception signal stored in the storage during a first time period; and acquires information relating to a second optical spectrum based on the information relating to the second reception signal stored in the storage during a second time period.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: February 8, 2022
    Assignee: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Masanori Okada, Hajime Nakamura
  • Publication number: 20210381917
    Abstract: A sensor drive circuit for driving a sensor with a current includes a first current source configured to generate a first current having a temperature characteristic of which a first order coefficient is positive and of which a second order coefficient is negative. The sensor drive circuit includes a second current source configured to generate a second current having a temperature characteristic of which a first order coefficient is negative and of which a second order coefficient is negative. The sensor drive circuit includes a current amplifier configured to amplify a third current, the third current being set by adding the first current and the second current. The sensor drive circuit includes a constant current source configured to generate a temperature-corrected constant current, such that a drive current for the sensor is set by adding the constant current to the amplified third current.
    Type: Application
    Filed: May 26, 2021
    Publication date: December 9, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Hajime NAKAMURA
  • Patent number: 11053942
    Abstract: A screw compressor is provided with: a compressor body in which a screw rotor is accommodated in a rotor casing; a motor in which a rotator and a stator are accommodated in a motor chamber, the motor for rotationally driving a rotor shaft through use of a motor shaft; axial liquid supplying parts, provided on an anti-rotor side of the motor shaft; a motor shaft cooling part which is a cavity extending in the axial direction inside the motor shaft, the motor shaft cooling part for cooling the motor shaft by circulating a cooling liquid through the inside of the cavity thereof; and a liquid outlet part positioned on a rotor side of the motor shaft or a motor side of the rotor shaft and fluidically connected to the motor shaft cooling part so as to extend radially inward from an outlet opening formed in an outer surface of the motor shaft or the rotor shaft.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: July 6, 2021
    Assignee: Kobe Steel, Ltd.
    Inventors: Katsunori Hamada, Noboru Tsuboi, Hajime Nakamura
  • Patent number: 11027586
    Abstract: Provided is a vehicle suspension member securing a strength against external force in a vehicle longitudinal direction. A lower arm includes an arm body, a front bush support part, a rear bush support part, a ball joint support part, a first rib, a second rib, and a third rib. The third rib is disposed in a lateral part connecting the ball joint support part to the rear bush support part. An S-shaped rib center curve of the third rib intersects with a straight line at an intersection. |(1?S2/S1)|?0.2 is satisfied, where S1 is area of a first region defined by the rib center curve and the first straight line, and S2 is area of a second region.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: June 8, 2021
    Assignee: Kobe Steel, Ltd.
    Inventors: Hiroaki Hosoi, Hajime Nakamura
  • Patent number: 10937578
    Abstract: An R—Fe—B base sintered magnet is prepared through the steps of providing an alloy fine powder having a predetermined composition, compression shaping the alloy fine powder in an applied magnetic field into a compact, sintering the compact at a temperature of 900-1,250° C. into a sintered body, cooling the sintered body to 400° C. or below, high-temperature heat treatment including placing a metal, compound or intermetallic compound containing HR which is Dy, Tb and/or Ho, on the surface of the sintered body, heating at a temperature from more than 950° C. to 1,100° C., for causing grain boundary diffusion of HR into the sintered body, and cooling to 400° C. or below, and low-temperature heat treatment including heating at a temperature of 400-600° C. and cooling to 300° C. or below. The sintered magnet produces a high coercivity despite a low content of Dy, Tb and Ho.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: March 2, 2021
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Tetsuya Ohashi, Tetsuya Kume, Koichi Hirota, Hajime Nakamura
  • Publication number: 20200400352
    Abstract: Provided are a sheath-integrated magnetic refrigeration member capable of preventing degradation of a magnetic refrigeration material with time in a magnetic refrigeration system without lowering the magnetocaloric effect and the thermal conductivity of the magnetic refrigeration material and its production method, and a magnetic refrigeration system using the sheath-integrated magnetic refrigeration member. The invention is a linear or thin band-like sheath-integrated magnetic refrigeration member including a sheath part 1 containing a non-ferromagnetic metal material and a core part 2 containing a magnetic refrigeration material.
    Type: Application
    Filed: June 18, 2020
    Publication date: December 24, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Hajime Nakamura