Patents by Inventor Ryuichi Ohtsuki

Ryuichi Ohtsuki 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).

  • Self-locking nut for eye glasses having an unthreaded hole with vertical channels
    Patent number: 5627610
    Abstract: A self-locking nut for eye glasses excellent in assembling efficiency into which a male screw is fitted to secure a material between the head of the male screw and the self-locking nut itself, comprising a first member having a female thread portion formed with a female thread in which the male screw is screwed and a pressing end face for pressing the material when the male screw is screwed in, a second member which is continuously formed on the other end face of the first member away form the material and which has a self-locking hole concentric with and connected to the threaded hole, and a third member continuously formed on the end face of the first member closer to the material and having a bushing portion which can be inserted into a hole in the material and which is formed with a through hole connected to the threaded hole of the first member; a moisture-proof nut comprising a sealing element having one end closed to bring the other end into contact with the material to waterproof the main body of the
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: May 6, 1997
    Assignee: Nitto Seiko Co., Ltd.
    Inventors: Koreto Marui, Ryuichi Ohtsuki, Masahiro Ohara
  • Self-locking nut with threaded and self-locking members, useful for eye glasses, and a nut tightener and a nut supplier for same
    Patent number: 5508758
    Abstract: A self-locking nut for eye glasses excellent in assembling efficiency into which a male screw is fitted to secure a material between the head of the male screw and the self-locking nut itself, comprising a first member having a female thread portion formed with a female thread in which the male screw is screwed and a pressing end face for pressing the material when the male screw is screwed in, a second member which is continuously formed on the other end face of the first member away form the material and which has a self-locking hole concentric with and connected to the threaded hole, and a third member continuously formed on the end face of the first member closer to the material and having a bushing portion which can be inserted into a hole in the material and which is formed with a through hole connected to the threaded hole of the first member; a moisture-proof nut comprising a sealing element having one end closed to bring the other end into contact with the material to waterproof the main body of the
    Type: Grant
    Filed: April 21, 1994
    Date of Patent: April 16, 1996
    Assignee: Nitto Seiko Co., Ltd.
    Inventors: Koreto Marui, Ryuichi Ohtsuki, Masahiro Ohara