Patents by Inventor Junichi Arai

Junichi Arai 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: 11168761
    Abstract: An inner wheel element (15a) is embedded in an outer wheel element (16a), such that a continuous range from an inner diameter side circumferential surface configuring an inner surface of a first annular concave part (22), through an outer circumferential surface of the inner wheel element (15a), to an inner diameter side circumferential surface configuring an inner surface of a second annular concave part (38) in a surface of the inner wheel element (15a) is covered over the entire circumference. Accordingly, a structure is achieved which easily secures a holding power of the synthetic resin outer wheel element with respect to the inner wheel element.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: November 9, 2021
    Assignee: NSK LTD.
    Inventors: Haruhiko Kiyota, Takeshi Yamamoto, Kaname Yasuda, Tomohiro Arai, Junichi Takano, Kazuki Hotta
  • Publication number: 20210324913
    Abstract: A sliding member of the present invention includes a base material and a coating layer that is formed on the base material. The coating layer includes a particle aggregate, and the particle aggregate contains two or more kinds of precipitation hardened copper alloy particles that have different compositions. The sliding member has high coating strength and superior wear resistance.
    Type: Application
    Filed: June 13, 2019
    Publication date: October 21, 2021
    Applicants: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Yoshinori IZAWA, Junichi ARAI, Katsunori OTOBE, Shinichi NISHIMURA
  • Patent number: 11148195
    Abstract: A laminate includes a base substrate, and a coating layer formed on the base substrate. The coating layer includes a copper alloy portions derived from precipitation-hardening copper alloy particles and hard particle portions which are harder than the copper alloy portions, the hard particle portions are derived from hard particles, and the parts bond with each other via an interface. Each of the hard particle portions has a non-spherical shape. A sliding member includes the laminate in at least one sliding portion. A method for manufacturing a laminate includes a step of spraying a mixture in a non-molten state including precipitation-hardening copper alloy particles and hard particles having a non-spherical shape and being harder than the copper alloy particles onto a base substrate, to form a coating layer on the base substrate.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: October 19, 2021
    Assignees: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Yoshinori Izawa, Junichi Arai, Yutaka Mabuchi, Katsunori Otobe, Shinichi Nishimura
  • Patent number: 11150593
    Abstract: An image forming apparatus includes: a photoconductor; a charging roller; an exposure device; a developing device that is provided on a downstream side of the charging roller in a rotation direction of the photoconductor, and forms a toner image by supplying toner to a latent image; a cleaning blade that is provided between a transfer part of a surface of the photoconductor located on a downstream side of the developing device in the rotation direction of the photoconductor and the charging roller, and removes residual toner adhering to a part of the surface of the photoconductor on a downstream side of the transfer part; a lubricant supplier that supplies a lubricant to the surface of the photoconductor; and a voltage controller that controls a charging voltage to be applied to the charging roller.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: October 19, 2021
    Assignee: Konica Minolta, Inc.
    Inventor: Junichi Arai
  • Publication number: 20210311427
    Abstract: An image forming apparatus includes: a photoconductor; a charging roller; an exposure device; a developing device that is provided on the downstream side of the charging roller in the rotation direction of the photoconductor, and forms a toner image by supplying toner to the latent image; a cleaning blade that is provided between a transfer part of the surface of the photoconductor located on a downstream side of the developing device in the rotation direction of the photoconductor and the charging roller, and removes the residual toner adhering to a part of the surface of the photoconductor on a downstream side of the transfer part; a lubricant supplier that supplies a lubricant to the surface of the photoconductor; and a voltage controller that controls a charging voltage to be applied to the charging roller.
    Type: Application
    Filed: March 5, 2021
    Publication date: October 7, 2021
    Applicant: Konica Minolta, Inc.
    Inventor: Junichi Arai
  • Publication number: 20210293158
    Abstract: A sliding member of the present invention includes a coating on a base material. The coating contains hard metal particles and corrosion-resistant metal particles that have hardness lower than that of the hard metal particles. The hard metal particles contain particles that have at least Vickers hardness of 600 Hv or higher. The corrosion-resistant metal particles are made of at least one kind of metal selected from the group consisting of copper (Cu), cobalt (Co), chromium (Cr), and nickel (Ni), or are made of an alloy containing said metal. The coating has a cross section in which the hard metal particles are dispersed in an island manner in a particle aggregate of the corrosion-resistant metal particles and in which an area ratio of the corrosion-resistant metal particles is 30% or larger. Thus, corrosion of the hard metal particles in the coating is prevented, whereby the sliding member maintains wear resistance for a long time.
    Type: Application
    Filed: July 19, 2018
    Publication date: September 23, 2021
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yoshinori IZAWA, Yutaka MABUCHI, Akinobu ITOU, Junichi ARAI, Misao MOGAMI, Masanao HARADA, Moriyuki NOGAMI
  • Publication number: 20210291263
    Abstract: A laminate includes a base substrate, and a coating layer formed on the base substrate. The coating layer includes a copper alloy portions derived from precipitation-hardening copper alloy particles and hard particle portions which are harder than the copper alloy portions, the hard particle portions are derived from hard particles, and the parts bond with each other via an interface. Each of the hard particle portions has a non-spherical shape. A sliding member includes the laminate in at least one sliding portion. A method for manufacturing a laminate includes a step of spraying a mixture in a non-molten state including precipitation-hardening copper alloy particles and hard particles having a non-spherical shape and being harder than the copper alloy particles onto a base substrate, to form a coating layer on the base substrate.
    Type: Application
    Filed: June 3, 2021
    Publication date: September 23, 2021
    Applicants: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Yoshinori IZAWA, Junichi ARAI, Yutaka MABUCHI, Katsunori OTOBE, Shinichi NISHIMURA
  • Publication number: 20210293274
    Abstract: A sliding member of the present invention includes a base material and a coating layer that is formed on the base material. The coating layer includes a particle aggregate that contains precipitation hardened copper alloy particles. The precipitation hardened copper alloy particles contain cobalt (Co) and silicon (Si) The sliding member has high coating strength and superior wear resistance.
    Type: Application
    Filed: June 19, 2019
    Publication date: September 23, 2021
    Applicants: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Yoshinori IZAWA, Junichi ARAI, Katsunori OTOBE, Shinichi NISHIMURA
  • Publication number: 20210253898
    Abstract: A heat shielding member includes a base, and a heat shielding membrane on the base. The heat shielding membrane includes a porous layer including at least a closed pore. The porous layer includes resin and carbon-based filler. The heat shielding member has both of low thermal conductivity and low heat capacity and improves the fuel economy performance.
    Type: Application
    Filed: June 13, 2018
    Publication date: August 19, 2021
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yuka SUZUKI, Yutaka MABUCHI, Takuma SUZUKI, Junichi ARAI
  • Patent number: 10982622
    Abstract: A sliding member includes a base substrate and a coating layer formed on the base substrate. The coating layer includes a steel portion derived from austenitic stainless steel particles and a copper portion derived from copper particles or copper alloy particles. The steel portion and the copper portion are bonded to each other via an interface between the steel portion and the copper portion.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: April 20, 2021
    Assignees: NISSAN MOTOR CO., LTD., RENAULT S.A.S.
    Inventors: Yoshinori Izawa, Yutaka Mabuchi, Junichi Arai, Christian Grente, Elodie Bonay, Carolina Specht, Jean Marie Mahlaire
  • Patent number: 10927893
    Abstract: A sliding member includes a base substrate and a coating layer formed on the base substrate. The coating layer includes a copper alloy part derived from a plurality of precipitation hardening copper alloy particles. The copper alloy parts are bonded to each other via interfaces between the copper alloy parts. The copper alloy part contains nickel and silicon as additive elements. The copper alloy part contains 2 to 5 percent by mass of nickel. A sliding member for an internal combustion engine includes the sliding member at a sliding part of the internal combustion engine.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: February 23, 2021
    Assignees: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Yoshinori Izawa, Junichi Arai, Katsunori Otobe, Shinichi Nishimura
  • Patent number: 10745809
    Abstract: A method for producing a laminated member includes a step of spraying a mixture in a non-molten state including a plurality of precipitation hardening copper alloy particles and a plurality of hard particles that have non-spherical shapes having a median aspect ratio of equal to or more than 1.2 and are harder than the copper alloy particles onto a base substrate to form a coating layer on the base substrate.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: August 18, 2020
    Assignees: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Yoshinori Izawa, Junichi Arai, Yutaka Mabuchi, Katsunori Otobe, Shinichi Nishimura
  • Publication number: 20200248647
    Abstract: A sliding member includes a base substrate and a coating layer formed on the base substrate. The coating layer includes a steel portion derived from austenitic stainless steel particles and a copper portion derived from copper particles or copper alloy particles. The steel portion and the copper portion are bonded to each other via an interface between the steel portion and the copper portion.
    Type: Application
    Filed: February 2, 2018
    Publication date: August 6, 2020
    Applicants: NISSAN MOTOR CO., LTD., RENAULT s.a.s.
    Inventors: Yoshinori IZAWA, Yutaka MABUCHI, Junichi ARAI, Christian GRENTE, Elodie BONAY, Carolina SPECHT, Jean Marie MAHLAIRE
  • Patent number: 10705467
    Abstract: An image forming apparatus includes a fixer that fixes toner adhering to a sheet that passes through a fixing nip, the fixer including: an endless fixing belt that rotates; and a presser that presses the fixing belt to form the fixing nip between the fixing belt and the presser. The image forming apparatus includes a hardware processor that calculates an amount of the toner adhering to the sheet that passes through the fixing nip, and determines a degree of abrasion of the fixing belt, based on the amount of the toner calculated by the hardware processor.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: July 7, 2020
    Assignee: Konica Minolta, Inc.
    Inventor: Junichi Arai
  • Patent number: 10666194
    Abstract: An oven-controlled crystal oscillator includes a base substrate, a power transistor, and a surface mount type crystal resonator. The base substrate has a bottom surface on which a mounting terminal for surface mounting is disposed. The power transistor is mounted on the base substrate. The surface mount type crystal resonator is mounted on the power transistor.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: May 26, 2020
    Assignee: NIHON DEMPA KOGYO CO., LTD.
    Inventor: Junichi Arai
  • Publication number: 20200011211
    Abstract: A sliding member includes a base substrate and a coating layer formed on the base substrate. The coating layer includes a copper alloy part derived from a plurality of precipitation hardening copper alloy particles. The copper alloy parts are bonded to each other via interfaces between the copper alloy parts. The copper alloy part contains nickel and silicon as additive elements. The copper alloy part contains 2 to 5 percent by mass of nickel. A sliding member for an internal combustion engine includes the sliding member at a sliding part of the internal combustion engine.
    Type: Application
    Filed: February 2, 2018
    Publication date: January 9, 2020
    Applicants: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Yoshinori IZAWA, Junichi ARAI, Katsunori OTOBE, Shinichi NISHIMURA
  • Publication number: 20190368049
    Abstract: A method for producing a laminated member includes a step of spraying a mixture in a non-molten state including a plurality of precipitation hardening copper alloy particles and a plurality of hard particles that have non-spherical shapes having a median aspect ratio of equal to or more than 1.2 and are harder than the copper alloy particles onto a base substrate to form a coating layer on the base substrate.
    Type: Application
    Filed: February 2, 2018
    Publication date: December 5, 2019
    Applicants: NISSAN MOTOR CO,, LTD., FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Yoshinori IZAWA, Junichi ARAI, Yutaka MABUCHI, Katsunori OTOBE, Shinichi NISHIMURA
  • Publication number: 20190344338
    Abstract: A laminate includes a base substrate, and a coating layer formed on the base substrate. The coating layer includes a copper alloy portions derived from precipitation-hardening copper alloy particles and hard particle portions which are harder than the copper alloy portions, the hard particle portions are derived from hard particles, and the parts bond with each other via an interface. Each of the hard particle portions has a non-spherical shape. A sliding member includes the laminate in at least one sliding portion. A method for manufacturing a laminate includes a step of spraying a mixture in a non-molten state including precipitation-hardening copper alloy particles and hard particles having a non-spherical shape and being harder than the copper alloy particles onto a base substrate, to form a coating layer on the base substrate.
    Type: Application
    Filed: February 2, 2018
    Publication date: November 14, 2019
    Applicants: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWER CO., LTD.
    Inventors: Yoshinori IZAWA, Junichi ARAI, Yutaka MABUCHI, Katsunori OTOBE, Shinichi NISHIMURA
  • Publication number: 20190286040
    Abstract: An image forming apparatus includes a fixer that fixes toner adhering to a sheet that passes through a fixing nip, the fixer including: an endless fixing belt that rotates; and a presser that presses the fixing belt to form the fixing nip between the fixing belt and the presser. The image forming apparatus includes a hardware processor that calculates an amount of the toner adhering to the sheet that passes through the fixing nip, and determines a degree of abrasion of the fixing belt, based on the amount of the toner calculated by the hardware processor.
    Type: Application
    Filed: February 13, 2019
    Publication date: September 19, 2019
    Inventor: JUNICHI ARAI
  • Patent number: 10354019
    Abstract: A computer-readable recording medium having stored herein a program for causing a computer to execute a dental prosthesis design process includes: searching a database storing data including structures of teeth including natural teeth to search for candidate teeth, which correspond to a part where a prosthesis is to be mounted on, based on information of a shape surrounding the part where the prosthesis is to be mounted on; putting priority levels on the candidate teeth by applying a predetermined rule to a matching degree of the searching; and outputting information of the candidate teeth based on the priority levels.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: July 16, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Toshihisa Fujiwara, Toshiaki Mase, Guoping Sun, Junichi Arai