Patents by Inventor Katsuji Seki

Katsuji Seki 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: 20200098810
    Abstract: A camera module includes an imaging device. The imaging device has a solid-state image sensor and a glass substrate bonded to a light-incident side of the solid-state image sensor. The solid-state image sensor and the glass substrate together form an integral body. A circuit substrate is electrically coupled to the solid-state image sensor. A spacer fixes a position of the imaging device relative to the circuit substrate. The spacer has a fixing structure. The fixing structure has a plurality of first surfaces positioned closer to the imaging device than at least one second surface of the spacer. The at least one second surface of the spacer is separated from the imaging device by adhesive.
    Type: Application
    Filed: December 15, 2017
    Publication date: March 26, 2020
    Applicant: Sony Semiconductor Solutions Corporation
    Inventors: Katsuji Kimura, Hirokazu Seki
  • Patent number: 10461104
    Abstract: A subject for the invention is to provide a friction material which contains neither any copper component nor metallic fibers and which has stable frictional properties and excellent wear resistance and is less apt to attack mating materials. This invention relates to a friction 10-35% by volume potassium titanate having a plurality of protrudent shapes, 3-10% by volume abrasive material having a Moh's hardness of 7 or higher, and 10-30% by volume elastomer-modified phenolic resin.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: October 29, 2019
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Yoshiyuki Sugai, Katsuji Seki
  • Patent number: 10060492
    Abstract: A friction material includes a fiber base material, a friction modifier and a binder. The friction modifier includes two or more kinds of non-whisker-like titanate compounds. The non-whisker-like titanate compound includes non-whisker-like lithium potassium titanate. The friction material includes no copper component. Alternatively, a friction material includes a fiber base material, a friction modifier and a binder. The friction material includes a non-whisker-like titanate compound and a low-melting-point metal fiber. The friction material includes no copper component.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: August 28, 2018
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Yoichi Onda, Hiroshi Yamamoto, Satoshi Kusaka, Yoshiyuki Sugai, Katsuji Seki
  • Patent number: 9656921
    Abstract: A friction material composition including a fiber base material, a friction modifier and a binder. A content of copper in the friction material composition is 0.5% by mass or less. The friction material composition includes a partially graphitized coke and muscovite. A friction material is formed by molding the friction material composition.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: May 23, 2017
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Takuya Kitami, Katsuji Seki, Yoshiyuki Sugai
  • Patent number: 9541144
    Abstract: A vehicular disc brake rotor is provided with a cast-iron base, a nitrogen diffusion layer formed on the cast-iron base, a nitrogen compound layer formed on the nitrogen diffusion layer, and an iron oxide layer including Fe3O4 and formed on the nitrogen compound layer. In a burnish and a first re-burnish of a “Passenger car-Braking device-Dynamometer test procedures” (which is based on JASO C 406:2000), a change ratio of a frictional coefficient between the burnish and the first re-burnish is 10% or less.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: January 10, 2017
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Yoshiyuki Sugai, Katsuji Seki, Takuya Takada
  • Publication number: 20160289442
    Abstract: A friction material includes a binder, a friction adjusting material and a fiber base material. The friction material does not contain a copper component. The friction material includes: at least any one of aluminum and an Fe—Al intermetallic compound; alumina; chromite; and a steel fiber.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 6, 2016
    Inventors: Takuya TAKADA, Katsuji SEKI, Yoshiyuki SUGAI, Tomomi YASUNO
  • Publication number: 20160289126
    Abstract: A friction material composition including a fiber base material, a friction modifier and a binder. A content of copper in the friction material composition is 0.5% by mass or less. The friction material composition includes a partially graphitized coke and muscovite. A friction material is formed by molding the friction material composition.
    Type: Application
    Filed: November 11, 2014
    Publication date: October 6, 2016
    Applicant: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Takuya KITAMI, Katsuji SEKI, Yoshiyuki SUGAI
  • Publication number: 20160245353
    Abstract: A friction material composition including a fiber base material, a binder and a friction modifier. A content of copper in the friction material composition is 0.5% by mass or less and the friction material composition includes a fluorine-based polymer particle. A friction material is formed by molding the friction material composition.
    Type: Application
    Filed: November 11, 2014
    Publication date: August 25, 2016
    Inventors: Yuji HANAIE, Katsuji SEKI, Yoshiyuki SUGAI, Motoyuki MIYAJI
  • Patent number: 9422994
    Abstract: A cast-iron friction member is manufactured by: performing a nitrocarburizing treatment on a cast workpiece at a treatment temperature of 500° C. to 600° C. to thus form a nitrogen compound layer on a surface of the workpiece; and exposing the workpiece to an atmosphere when a temperature becomes 400° C. to 480° C. after the nitrocarburizing treatment so as to cool the workpiece to a room temperature while keeping a contact state with oxygen to thus form an iron oxide layer including Fe3O4 on a surface of the nitrogen compound layer.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: August 23, 2016
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Yoshiyuki Sugai, Katsuji Seki, Takuya Takada
  • Publication number: 20150369320
    Abstract: A friction material includes a fiber base material, a friction modifier and a binder. The friction modifier includes two or more kinds of non-whisker-like titanate compounds. The non-whisker-like titanate compound includes non-whisker-like lithium potassium titanate. The friction material includes no copper component. Alternatively, a friction material includes a fiber base material, a friction modifier and a binder. The friction material includes a non-whisker-like titanate compound and a low-melting-point metal fiber. The friction material includes no copper component.
    Type: Application
    Filed: December 20, 2013
    Publication date: December 24, 2015
    Applicant: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Yoichi ONDA, Hiroshi YAMAMOTO, Satoshi KUSAKA, Yoshiyuki SUGAI, Katsuji SEKI
  • Publication number: 20150287753
    Abstract: The problem addressed by the present invention is to provide a friction material, which does not contain a copper component or a metal fiber, has stable friction characteristics, has superior wear resistance, and has a low aggressiveness with respect to a partner material. The friction material does not contain a metal fiber or a copper component, and contains 10-35 vol % of potassium titanate, which has a plurality of convex shapes; 3-10 vol of an abrasive material having a Mohs hardness of at least 7, and 10-30 vol % of an elastomer-modified phenyl resin.
    Type: Application
    Filed: December 20, 2013
    Publication date: October 8, 2015
    Inventors: Yoshiyuki Sugai, Katsuji Seki
  • Patent number: 9127733
    Abstract: A friction material contains: at least one kind of a titanate compound having a shape having a plurality of convex portions; and a bio-soluble inorganic fiber. In the titanate compound, a three-dimensional shape of a particle thereof has a plurality of convex portions.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: September 8, 2015
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Eri Itami, Hiroshi Yamamoto, Takayuki Watanabe, Katsuji Seki
  • Publication number: 20140342899
    Abstract: A friction material contains: at least one kind of a titanate compound having a shape having a plurality of convex portions; and a bio-soluble inorganic fiber. In the titanate compound, a three-dimensional shape of a particle thereof has a plurality of convex portions.
    Type: Application
    Filed: September 13, 2012
    Publication date: November 20, 2014
    Applicant: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Eri Itami, Hiroshi Yamamoto, Takayuki Watanabe, Katsuji Seki
  • Publication number: 20140060704
    Abstract: A cast-iron friction member is manufactured by: performing a nitrocarburizing treatment on a cast workpiece at a treatment temperature of 500° C. to 600° C. to thus form a nitrogen compound layer on a surface of the workpiece; and exposing the workpiece to an atmosphere when a temperature becomes 400° C. to 480° C. after the nitrocarburizing treatment so as to cool the workpiece to a room temperature while keeping a contact state with oxygen to thus form an iron oxide layer including Fe3O4 on a surface of the nitrogen compound layer.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 6, 2014
    Applicant: AKEBOND BRAKE INDUSTRY CO., LTD.
    Inventors: Yoshiyuki SUGAI, Katsuji SEKI, Takuya TAKADA
  • Publication number: 20140060983
    Abstract: A vehicular disc brake rotor is provided with a cast-iron base, a nitrogen diffusion layer formed on the cast-iron base, a nitrogen compound layer formed on the nitrogen diffusion layer, and an iron oxide layer including Fe3O4 and formed on the nitrogen compound layer. In a burnish and a first re-burnish of a “Passenger car-Braking device-Dynamometer test procedures” (which is based on JASO C 406:2000), a change ratio of a frictional coefficient between the burnish and the first re-burnish is 10% or less.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 6, 2014
    Applicant: Akebono Brake Industry Co., Ltd
    Inventors: Yoshiyuki SUGAI, Katsuji SEKI, Takuya TAKADA
  • Patent number: 5360842
    Abstract: A non-asbestos friction material containing friction dust comprising a composite of inorganic compound with polymerization product of cashew nut shell oil is disclosed. The material is used for the brake lining, disc pad and clutch facing for cars and industrial machinery.
    Type: Grant
    Filed: January 4, 1993
    Date of Patent: November 1, 1994
    Assignees: Akebono Brake Industry Co., Ltd., Akebono Research and Development Centre Ltd.
    Inventors: Katsuji Seki, Truong V. Hung
  • Patent number: 5217528
    Abstract: A non-asbestos friction material comprising mica powder adhered with aluminum phosphate and then subjected to the heating treatment, friction modifier and thermosetting resin binder is disclosed. The material is used for the brake lining and clutch facing for cars and industrial machinery.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: June 8, 1993
    Assignees: Akebono Brake Industry Co., Ltd., Akebono Research and Development Centre Ltd.
    Inventor: Katsuji Seki
  • Patent number: 5087642
    Abstract: A friction material is disclosed, which is characterized in that, in the friction material comprising reinforcing material, friction modifier, solid lubricant and thermosetting organic binder, said thermosetting organic binder is a resin having less hydroxyl group content compared with phenol resin.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: February 11, 1992
    Assignees: Akebono Brake Industry Co., Ltd., Akebono Research and Development Centre, Ltd.
    Inventors: Katsuji Seki, Naoyuki Hashimoto