Patents by Inventor Katsuhiro Tsujimoto

Katsuhiro Tsujimoto 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: 20200182331
    Abstract: Provided is a gear transmission device that can suppress backlash favorably even in the case of extended use. The gear transmission device includes a first gear having a plurality of first tooth portions with a tooth thickness that increases progressively toward the outer end side, a second gear having a plurality of second tooth portions with a tooth thickness that decreases progressively toward the outer end side, and an urging portion configured to apply an urging force to the first gear in the direction along the rational axis in such a manner that the tooth surface of the first tapered tooth area is placed in abutment against the tooth surface of the second tapered tooth area.
    Type: Application
    Filed: August 31, 2017
    Publication date: June 11, 2020
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventor: Katsuhiro TSUJIMOTO
  • Patent number: 10598253
    Abstract: A drive gear and a driven gear meshing therewith are provided. The driven gear has a plurality of areas that provide driving loads variable with a rotational angle. Tooth widths of tooth portions included in the plurality of areas are set different from each other.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: March 24, 2020
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Katsuhiro Tsujimoto, Shinya Yamaguchi
  • Publication number: 20190331170
    Abstract: In a housing, accommodated are an internal gear, an external gear, an eccentric axis member and an Oldham coupling member. The external gear is arranged with a part of external teeth being meshed with the internal gear, and supported to be rotatable about an eccentric axis, which is offset by a predetermined distance from a rotation axis in parallel therewith on a plane including the rotation axis, and the Oldham coupling member has a guide hole receiving therein a barrel axis portion of the eccentric axis member, so that the barrel axis portion is supported to be rotatable in the guide hole. On a rotating surface of the external gear facing the Oldham coupling member, held are shaft members, about which slide members are supported to be rotatable, so that the Oldham coupling member is supported to be slidable relative to the external gear through the slide members.
    Type: Application
    Filed: November 2, 2017
    Publication date: October 31, 2019
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventor: Katsuhiro Tsujimoto
  • Publication number: 20180238422
    Abstract: A drive gear and a driven gear meshing therewith are provided. The driven gear has a plurality of areas that provide driving loads variable with a rotational angle. Tooth widths of tooth portions included in the plurality of areas are set different from each other.
    Type: Application
    Filed: July 12, 2016
    Publication date: August 23, 2018
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Katsuhiro TSUJIMOTO, Shinya YAMAGUCHI
  • Publication number: 20180238421
    Abstract: A gear transmission mechanism includes a second gear, a first gear forming tooth portions at an outer circumference of a sector-like gear body for meshing with the second gear, and a rotation restricting mechanism for setting a rotation limit of the first gear. The rotation restricting mechanism includes an abutment portion provided in the first gear and a stopper provided in the housing. At least one of an abutment face in which the abutment portion comes into abutment against the stopper and a stopper face in which the stopper comes into abutment against the abutment face includes an inclination portion for creating a component force from rotational force of the sector gear at the time of mutual abutment.
    Type: Application
    Filed: October 3, 2016
    Publication date: August 23, 2018
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Shinya YAMAGUCHI, Katsuhiro TSUJIMOTO
  • Publication number: 20170138228
    Abstract: A valve opening and closing timing control apparatus includes a phase adjustment mechanism of a gear type specifying a relative rotation phase between a driving-side rotation member and a driven-side rotation member by an electric actuator, the phase adjustment mechanism causing a revolution of a position of an eccentric axis about a rotation axis by the electric actuator so that an input gear connected to the driven-side rotation member via an Oldham coupling rotates relative to an output gear fixed to the driven-side rotation member, a groove portion in a linear form and a protruding portion in a rectangular form in the Oldham coupling slidably engaging with each other between the driving-side rotation member and an Oldham ring, a groove portion in a linear form and a protruding portion in a rectangular form in the Oldham coupling slidably engaging with each other between the Oldham ring and the input gear.
    Type: Application
    Filed: August 11, 2015
    Publication date: May 18, 2017
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Eiji MIYACHI, Naoto TOMA, Yoshiaki IGUCHI, Eiri NAGATA, Nobuaki KURITA, Masayoshi TAKEUCHI, Katsuhiro TSUJIMOTO
  • Patent number: 6312833
    Abstract: A multilayered wiring layer having high thermal stability, high stress migration resistance and low electrical resistance. The wiring layer includes at least two layers formed on a substrate wherein each layer has substantially the same component and wherein the relationship between grain size and thickness of each of the at least two layers is 0.5<d/h<2, wherein d is the grain size of each layer and h is the thickness of each layer.
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: November 6, 2001
    Assignee: International Business Machines Corporation
    Inventors: Satoshi Tsuji, Hiroshi Takatsuji, Katsuhiro Tsujimoto