Patents by Inventor Yasuhiro Tamatsu

Yasuhiro Tamatsu 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).

  • Electromagnetic clutch and manufacturing method thereof
    Patent number: 9777780
    Abstract: A ring insertion groove is formed between adjacent two of circular plates, which are made of a magnetic material and are arranged concentric with each other, and a ring, which is made of a non-magnetic material and has a larger deformation resistance in comparison to the magnetic material of the plates, is press fitted into the ring insertion groove. Thereafter, a peripheral part around an opening of the ring insertion groove is plastically flowed, so that a compression stress is left in the ring.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: October 3, 2017
    Assignee: DENSO CORPORATION
    Inventors: Yousuke Yamagami, Motohiko Ueda, Tooru Ookuma, Yasuo Tabuchi, Tomoyuki Mizuguchi, Kazunori Mizutori, Yasuhiro Tamatsu
  • ELECTROMAGNETIC CLUTCH AND MANUFACTURING METHOD THEREOF
    Publication number: 20160025159
    Abstract: A ring insertion groove is formed between adjacent two of circular plates, which are made of a magnetic material and are arranged concentric with each other, and a ring, which is made of a non-magnetic material and has a larger deformation resistance in comparison to the magnetic material of the plates, is press fitted into the ring insertion groove. Thereafter, a peripheral part around an opening of the ring insertion groove is plastically flowed, so that a compression stress is left in the ring.
    Type: Application
    Filed: December 10, 2013
    Publication date: January 28, 2016
    Inventors: Yousuke YAMAGAMI, Motohiko UEDA, Tooru OOKUMA, Yasuo TABUCHI, Tomoyuki MIZUGUCHI, Kazunori MIZUTORI, Yasuhiro TAMATSU
  • Ejector
    Patent number: 8814532
    Abstract: A nozzle of an ejector depressurizes and injects fluid, which is supplied to the nozzle. The nozzle is received in a receiving space of a body. The nozzle and the body are formed by press working. The nozzle includes nozzle-side ribs, which extend in an axial direction and project radially outward. The body includes body-side ribs, which extend in the axial direction and project radially outward. In a predetermined cross section of each of the nozzle and the body, which is perpendicular to the axial direction and includes the corresponding ribs, the nozzle or the body is formed seamlessly as a continuous single piece member.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: August 26, 2014
    Assignee: Denso Corporation
    Inventors: Gouta Ogata, Kazunori Mizutori, Masahiko Ikawa, Yasuhiro Tamatsu, Hiroki Nakagawa, Haruyuki Nishijima, Mika Gocho
  • Ejector
    Publication number: 20110236227
    Abstract: A nozzle of an ejector depressurizes and injects fluid, which is supplied to the nozzle. The nozzle is received in a receiving space of a body. The nozzle and the body are formed by press working. The nozzle includes nozzle-side ribs, which extend in an axial direction and project radially outward. The body includes body-side ribs, which extend in the axial direction and project radially outward. In a predetermined cross section of each of the nozzle and the body, which is perpendicular to the axial direction and includes the corresponding ribs, the nozzle or the body is formed seamlessly as a continuous single piece member.
    Type: Application
    Filed: March 28, 2011
    Publication date: September 29, 2011
    Applicant: DENSO CORPORATION
    Inventors: Gouta Ogata, Kazunori Mizutori, Masahiko Ikawa, Yasuhiro Tamatsu, Hiroki Nakagawa, Haruyuki Nishijima, Mika Gocho