Patents by Inventor Yumiko Muramoto

Yumiko Muramoto 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).

  • Mold for injection molding and a method of operating a mold
    Patent number: 7156649
    Abstract: A fixed mold (10) has engaging pins (17) projecting towards a movable mold (20). Each engaging pin (17) includes a shaft (17A) and a large-diameter portion (17C) formed at the leading end of the shaft (17A). The large-diameter portions (17C) of the engaging pins (17) interfere with the bottom surfaces of recesses (53) of an ejector plate (50) in the process of separating the movable mold (20). Thus, the ejector plate (50) is moved forward relative to the movable mold (20) and leading ends of ejector pins (90) project from the movable mold (20).
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: January 2, 2007
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Naoya Hattori, Seiichi Kurosawa, Shinsuke Tsutsui, Toshiya Muraki, Yumiko Muramoto
  • Mold for injection molding and a method of operating a mold
    Publication number: 20050031729
    Abstract: A fixed mold (10) has engaging pins (17) projecting towards a movable mold (20). Each engaging pin (17) includes a shaft (17A) and a large-diameter portion (17C) formed at the leading end of the shaft (17A). The large-diameter portions (17C) of the engaging pins (17) interfere with the bottom surfaces of recesses (53) of an ejector plate (50) in the process of separating the movable mold (20). Thus, the ejector plate (50) is moved forward relative to the movable mold (20) and leading ends of ejector pins (90) project from the movable mold (20).
    Type: Application
    Filed: August 4, 2004
    Publication date: February 10, 2005
    Applicant: Sumitomo Wiring Systems, Ltd.
    Inventors: Naoya Hattori, Seiichi Kurosawa, Shinsuke Tsutsui, Toshiya Muraki, Yumiko Muramoto
  • Doll
    Patent number: D825692
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: August 14, 2018
    Assignee: SANRIO COMPANY, LTD.
    Inventors: Masaki Tsuji, Yumiko Muramoto
  • Doll
    Patent number: D826346
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: August 21, 2018
    Assignee: SANRIO COMPANY, LTD.
    Inventors: Masaki Tsuji, Yumiko Muramoto
  • Doll
    Patent number: D826347
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: August 21, 2018
    Assignee: SANRIO COMPANY, LTD.
    Inventors: Masaki Tsuji, Yumiko Muramoto
  • Doll
    Patent number: D826348
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: August 21, 2018
    Assignee: SANRIO COMPANY, LTD.
    Inventors: Masaki Tsuji, Yumiko Muramoto
  • Doll
    Patent number: D832378
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: October 30, 2018
    Assignee: SANRIO COMPANY, LTD.
    Inventors: Masaki Tsuji, Yumiko Muramoto