Patents by Inventor Ryuji Fujii

Ryuji Fujii 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: 20210023919
    Abstract: A side door comprises a door panel portion and a reinforcement portion (a rear-side reinforcement portion and others). The reinforcement portion is provided at at least one of a corner portion positioned between a lower portion and a front-side portion of a peripheral part of the door panel portion and another corner portion positioned between the lower portion and a rear-side portion of the peripheral part of the door panel portion such that the reinforcement portion overlaps with a vehicle-body frame member in a vehicle side view. The reinforcement portion is provided with a curved portion at an inside part of the corner portion where the reinforcement portion is provided. The curved portion is configured to be curved convexly toward an outside part of the corner portion in the vehicle side view.
    Type: Application
    Filed: July 16, 2020
    Publication date: January 28, 2021
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Kaori SUZUKI, Masanori HONDA, Tomohito OKUYAMA, Ryuji NONAKA, Hideaki FUJII, Noboru SHOUNO, Daisuke NAKAYAMA, Isamu KIZAKI, Eri KAIKI, Yuichi SUGIMURA, Taei SHIBAHARA, Orie TANAKA
  • Publication number: 20210024138
    Abstract: There are provided a vehicle-body frame member forming an opening portion for entrance at a vehicle side part and a front side door provided so as to open and close the opening portion. The vehicle-body frame member comprises a side sill, the front side door comprises a door panel portion provided with an inner lower portion which overlaps with the side sill in a vehicle wide view and reinforcement portions provided at two side-portions of a peripheral part of the door panel portion which are continuous and include the inner lower portion such that the reinforcement portions overlap with the vehicle-body frame member in a vehicle side view.
    Type: Application
    Filed: July 15, 2020
    Publication date: January 28, 2021
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Eri KAIKI, Masanori HONDA, Tomohito OKUYAMA, Ryuji NONAKA, Hideaki FUJII, Noboru SHOUNO, Daisuke NAKAYAMA, Isamu KIZAKI, Yuichi SUGIMURA, Taei SHIBAHARA, Kaori SUZUKI, Orie TANAKA
  • Publication number: 20210023921
    Abstract: A side door comprises a door panel portion and a reinforcement portion (a lower-side reinforcement portion and others). The door panel portion is provided to cover an opening portion for entrance and configured such that its peripheral part overlaps with an opening-portion-forming vehicle-body frame member (a side sill and others) in a vehicle side view. The reinforcement portion is provided at the peripheral part of the door panel portion such that it overlaps with the opening-portion-forming vehicle-body frame member in the vehicle side view, thereby reinforcing the peripheral part of the door panel portion against a collision load applied to the side door from a vehicle side. The reinforcement portion is provided at a portion of the peripheral part of the door panel portion which includes a part corresponding to the vehicle-width-direction-extending vehicle-body frame member (a first floor cross member and others).
    Type: Application
    Filed: July 16, 2020
    Publication date: January 28, 2021
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Kaori SUZUKI, Masanori HONDA, Tomohito OKUYAMA, Ryuji NONAKA, Hideaki FUJII, Noboru SHOUNO, Daisuke NAKAYAMA, Isamu KIZAKI, Eri KAIKI, Yuichi SUGIMURA, Taei SHIBAHARA, Orie TANAKA
  • Patent number: 10811042
    Abstract: A thermally assisted magnetic recording head and a thermally assisted magnetic recording disk drive are disclosed. The thermally assisted magnetic recording head includes a slider body, a laser substrate, a laser and a magnetic head, wherein the laser substrate is provided on the slider body, the laser is provided on the laser substrate, and the magnetic head is provided at a front end of the slider body. The magnetic head includes an optical waveguide facing the laser. The angle between a light incident surface of the optical waveguide and an incident direction of a laser light incident on the optical waveguide is less than 90 degrees. The thermally assisted magnetic recording disk drive includes a plurality of magnetic disks and a magnetic head suspending frame. A front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads mentioned above.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: October 20, 2020
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Ryuji Fujii, Jian Hui Huang, Natsuo Nishijima, Lin Huang, Shi Xiong Chen, Bin Qi, Wen Rong Guo
  • Patent number: 10746106
    Abstract: An IGV opening command value is corrected to calculate an actual opening equivalent value that indicates an approximate value of an actual opening. A temperature estimation value, for a case where a mixture of fuel and in-flowing air is combusted, is calculated using the actual opening equivalent value, atmospheric conditions, and an output from a gas turbine. A fuel distribution command value that indicates distribution of fuel output from a plurality of fuel supply systems is calculated on the basis of the temperature estimation value. The fuel distribution command value and a fuel control signal command value that indicates the total flow rate of fuel to be output to the plurality of fuel supply systems are acquired, and respective valve openings of fuel flow rate regulating valves of the fuel supply systems are calculated on the basis of the fuel distribution command value and the fuel control signal command value.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: August 18, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Keisuke Yamamoto, Takashi Sonoda, Ryuji Takenaka, Hikaru Katano, Eiki Anzawa, Sosuke Nakamura, Fuminori Fujii, Shinichi Yoshioka
  • Publication number: 20200143827
    Abstract: A thermally assisted magnetic recording head and a thermally assisted magnetic recording disk drive are disclosed. The thermally assisted magnetic recording head includes a slider body, a laser substrate, a laser and a magnetic head, wherein the laser substrate is provided on the slider body, the laser is provided on the laser substrate, and the magnetic head is provided at a front end of the slider body. The magnetic head includes an optical waveguide facing the laser. The angle between a light incident surface of the optical waveguide and an incident direction of a laser light incident on the optical waveguide is less than 90 degrees. The thermally assisted magnetic recording disk drive includes a plurality of magnetic disks and a magnetic head suspending frame. A front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads mentioned above.
    Type: Application
    Filed: December 24, 2018
    Publication date: May 7, 2020
    Inventors: Ryuji Fujii, Jian Hui Huang, Natsuo Nishijima, Lin Huang, Shi Xiong Chen, Bin Qi, Wen Rong Guo
  • Patent number: 10591330
    Abstract: Flow rate measurement is performed with a propagation time by using a pair of ultrasonic wave oscillators which is provided in flow path through which a fluid to be measured flows, and is disposed so as to transmit and receive an ultrasonic wave signal by causing the ultrasonic wave signal to be reflected on an inner wall of flow path at least once. In addition, adjustment of an amplification rate is periodically performed by amplifier, which amplifies the ultrasonic wave signal received by each of the ultrasonic wave oscillators to a predetermined amplitude, and a difference between a previous amplification rate and a current amplification rate is a predetermined value or more, and the instantaneous flow rate calculated by flow rate calculation unit is a predetermined flow rate or less, the reference voltage is adjusted by reference voltage setting unit. With the configuration, the propagation time can be stably measured and deterioration of the maximum amplitude is prevented.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: March 17, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuki Shiota, Kenji Yasuda, Ryuji Iwamoto, Yuji Fujii, Yasuo Koba
  • Patent number: 10490212
    Abstract: A row bar for forming magnetic heads includes a row of magnetic head forming portions each having a magnetic head and a cutting portion adjacent to the magnetic heads. A row of bonding pads and a first ELG pad are provided at the magnetic head, a second ELG pad is provided at the cutting portion, both of the first and the second ELG pads are adapted for contacting with a probe during lapping process, and a conductive structure that is higher than surfaces of the first and the second ELG pads is formed at peripheries of the first and the second ELG pads respectively. Due to the conductive structures, a probe used in lapping process will be prevented from shifting from the ELG pads to ensure a stable contact, thereby obtaining efficient and accurate resistance measurement.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: November 26, 2019
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Ryuji Fujii, Shi Xiong Chen, Long Ping Wang, Zeng Hui Zhang
  • Patent number: 10311903
    Abstract: A method of testing dynamic performances for a slider body of a thermally-assisted magnetic head includes: providing a slider body which is disconnected with a light source unit; removably mounting the slider body to a test head suspension assembly; keeping to provide a flat top beam to the slider body, the flat top beam being aligned with the optical waveguide, and a projection of an incident end of the optical waveguide being located within a light spot of the flat top beam; and testing the dynamic performance of the slider body. It can save the material cost and labor cost, and eliminate a precise optical alignment between an input light and an optical waveguide in the slider body to improve testing efficiency.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: June 4, 2019
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Seiichi Takayama, Takashi Honda, Ryuji Fujii, Ryo Hosoi, Kaichiu Cheung, Tsutomu Sasaki, Jingtao Lu, Fanglong Nie
  • Publication number: 20190005980
    Abstract: A method of testing dynamic performances for a slider body of a thermally-assisted magnetic head includes: providing a slider body which is disconnected with a light source unit; removably mounting the slider body to a test head suspension assembly; keeping to provide a flat top beam to the slider body, the flat top beam being aligned with the optical waveguide, and a projection of an incident end of the optical waveguide being located within a light spot of the flat top beam; and testing the dynamic performance of the slider body. It can save the material cost and labor cost, and eliminate a precise optical alignment between an input light and an optical waveguide in the slider body to improve testing efficiency.
    Type: Application
    Filed: July 14, 2017
    Publication date: January 3, 2019
    Inventors: Seiichi TAKAYAMA, Takashi HONDA, Ryuji FUJII, Ryo HOSOI, Kaichiu CHEUNG, Tsutomu SASAKI, Jingtao LU, Fanglong NIE
  • Publication number: 20180246278
    Abstract: A coupling structure of optical components has a first optical component, a second optical component and a coupling solder layer. The first optical component has a lensed fiber, a first holder holding the lensed fiber and a first metal layer formed on a first connecting end face of the first holder. The second optical component has a waveguide, a second holder holding the waveguide and a second metal layer formed on a second connecting end face of the second holder. The coupling solder layer is in direct contact with both of the first metal layer and the second metal layer, and formed with solder.
    Type: Application
    Filed: February 28, 2017
    Publication date: August 30, 2018
    Inventors: Seiichi TAKAYAMA, Kiyohiko ABE, Ryuji FUJII, Takashi HONDA, Shi Xiong CHEN, Osamu HARAKAWA
  • Patent number: 10061084
    Abstract: A coupling structure of optical components has a first optical component, a second optical component and a coupling solder layer. The first optical component has a lensed fiber, a first holder holding the lensed fiber and a first metal layer formed on a first connecting end face of the first holder. The second optical component has a waveguide, a second holder holding the waveguide and a second metal layer formed on a second connecting end face of the second holder. The coupling solder layer is in direct contact with both of the first metal layer and the second metal layer, and formed with solder.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: August 28, 2018
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Seiichi Takayama, Kiyohiko Abe, Ryuji Fujii, Takashi Honda, Shi Xiong Chen, Osamu Harakawa
  • Publication number: 20180025744
    Abstract: A row bar for forming magnetic heads includes a row of magnetic head forming portions each having a magnetic head and a cutting portion adjacent to the magnetic heads. A row of bonding pads and a first ELG pad are provided at the magnetic head, a second ELG pad is provided at the cutting portion, both of the first and the second ELG pads are adapted for contacting with a probe during lapping process, and a conductive structure that is higher than surfaces of the first and the second ELG pads is formed at peripheries of the first and the second ELG pads respectively. Due to the conductive structures, a probe used in lapping process will be prevented from shifting from the ELG pads to ensure a stable contact, thereby obtaining efficient and accurate resistance measurement.
    Type: Application
    Filed: July 19, 2017
    Publication date: January 25, 2018
    Inventors: Ryuji FUJII, Shi Xiong CHEN, Long Ping WANG, Zeng Hui ZHANG
  • Patent number: 9840767
    Abstract: A manufacturing method for a head slider coated with Diamond-like Carbon (DLC) includes: providing a substrate that is to be finally made into a head slider; depositing a DLC layer on a surface of the substrate, with carbon plasma source being sputtered in a direction that is vertical to the surface of the substrate; and doping a fluorine-doping (F-doping) layer on the DLC layer. Whereby the head slider has good film adhesion performance, higher hardness, better wear resistance, lower surface energy to obtain good hydrophobicity and oleophobicity, and lower fly height in HDD.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: December 12, 2017
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Jian Hui Huang, Xiao Ke Ding, Hong Tao Ma, Ryuji Fujii, Da Yao He, De Jin Fan
  • Publication number: 20170283939
    Abstract: A manufacturing method for a head slider coated with Diamond-like Carbon (DLC) includes: providing a substrate that is to be finally made into a head slider; depositing a DLC layer on a surface of the substrate, with carbon plasma source being sputtered in a direction that is vertical to the surface of the substrate; and doping a fluorine-doping (F-doping) layer on the DLC layer. Whereby the head slider has good film adhesion performance, higher hardness, better wear resistance, lower surface energy to obtain good hydrophobicity and oleophobicity, and lower fly height in HDD.
    Type: Application
    Filed: April 4, 2016
    Publication date: October 5, 2017
    Inventors: Jian Hui HUANG, Xiao Ke DING, Hong Tao MA, Ryuji FUJII, Da Yao HE, De Jin FAN
  • Patent number: 9666218
    Abstract: A thermal assisted magnetic recording head has a magnetic head slider and a light source unit that is fixed to the magnetic head slider. A first surface of the light source unit and a second surface of the magnetic head slider face each other via a gap. The light source unit includes a light source that emits laser light from an emission part that is positioned on the first surface and a photodetector that detects the laser light. The magnetic head slider includes a waveguide through which the laser light that is incident on an incident part positioned on the second surface propagates, near-field light generation means for generating near-field light on an air bearing surface, the near-field light being generated from the laser light that propagates through the waveguide, and a recording magnetic pole that is provided adjacent to the near-field light generation means and that has an end part positioned on the air bearing surface.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: May 30, 2017
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Takashi Honda, Seiichi Takayama, Ryuji Fujii
  • Patent number: 9489972
    Abstract: A light source unit has a substrate, a light source that is mounted to the substrate. The light source includes; a first emission part that emits a forward light, the forward light being a laser light in an oscillation state; a second emission part that is located on a side opposite to the first emission part and that emits a rearward light, the rearward light being a laser light in an oscillation state; and a light leakage part located at a position different from the first emission part and the second emission part. The light source further includes a photodetector that is provided on the substrate, wherein the photodetector has a light receiving surface for detecting a leakage light that leaks from the light leakage part.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: November 8, 2016
    Assignees: SAE MAGNETICS (H.K.) LTD., TDK CORPORATION, ROHM CO., LTD.
    Inventors: Takashi Honda, Seiichi Takayama, Ryuji Fujii, Koji Shimazawa, Tsuguki Noma, Yoshiteru Nagai
  • Publication number: 20160284370
    Abstract: A thermally assisted magnetic head (TAMH) slider having an air bearing surface and a back surface opposite the air bearing surface, which includes a slider substrate, a magnetic head portion configured on the slider substrate and having a waveguide formed therein, a semiconductor surface emitting laser configured on the back surface with an emitting surface facing the back surface; and a lens configured between the semiconductor surface emitting laser and the waveguide for focusing lights emitted from the semiconductor surface emitting laser on an incident end of the waveguide. The TAMH slider has stable performance, and can rapidly write data to a magnetic recording medium with high recording density.
    Type: Application
    Filed: March 26, 2015
    Publication date: September 29, 2016
    Inventors: Seiichi TAKAYAMA, Takashi HONDA, Yasutoshi FUJITA, Osamu HARAKAWA, Ryuji FUJII
  • Patent number: 9437226
    Abstract: A method of testing a TAMH includes providing a slider body having a waveguide embedded therein with an incidence end extending toward a back surface of the slider body; providing a light source unit including a light source and a unit substrate; coating a bonding material layer on the back surface, under the bottom, or both on the back surface and under the bottom of the unit substrate; coating a localization material layer on the back surface; aligning the light source unit to the slider body; causing a light emitted from the light source and allowed to be incident on the incidence end to anneal the localization material layer to generate an annealing mark; removing the light source unit or the light source from the slider body; and measuring a position offset between the annealing mark and the incidence end. The method can evaluate alignment accuracy of a slider body and a light source unit in two dimensional directions.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: September 6, 2016
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Tadatoshi Koba, Seiichi Takayama, Ryuji Fujii, Takashi Honda, Osamu Harakawa, Masahiro Kuribayashi
  • Patent number: 9437227
    Abstract: A thermally assisted magnetic recording head slider includes a light source unit having a light emitting element emitting laser light and a submount holding the light emitting element, and slider including a thin-film laminated part having a main magnetic pole layer, a near-field light generating element and an optical waveguide. A combination of the light emitting element and near-field light generating element is composed of a first pattern or second pattern. The light source unit is mounted on a light source placing surface so that a substrate surface of the light emitting element is orthogonal to a laminated surface of the thin-film laminated part. A plurality of electrode pads are formed on the outer end surface of the slider. The light source unit has a first element electrode and second element electrode.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: September 6, 2016
    Assignee: SAE Magnetic (H.K.) Ltd.
    Inventors: Takashi Honda, Seiichi Takayama, Ryuji Fujii