Patents by Inventor Yasuhiro Maekawa

Yasuhiro Maekawa 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).

  • Liner-type barrel
    Patent number: 10434697
    Abstract: A barrel main body, a sleeve, and a fixing mechanism (a fastening hole and a fastening device) are provided. The barrel main body includes a barrel hole having a cylindrical shape and a slit dividing an inner circumferential surface of the barrel hole. The sleeve having a hollow cylindrical shape is removably incorporated into the barrel hole. The slit includes two cutout surfaces facing each other with a space between. The fixing mechanism brings the inner circumferential surface of the barrel hole into close contact with the sleeve without any gap by narrowing the space between the cutout surfaces and deforming the barrel main body.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: October 8, 2019
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Shozo Suzuki, Masatoshi Ohara, Yasuhiro Maekawa
  • LINER-TYPE BARREL
    Publication number: 20180093407
    Abstract: A barrel main body, a sleeve, and a fixing mechanism (a fastening hole and a fastening device) are provided. The barrel main body includes a barrel hole having a cylindrical shape and a slit dividing an inner circumferential surface of the barrel hole. The sleeve having a hollow cylindrical shape is removably incorporated into the barrel hole. The slit includes two cutout surfaces facing each other with a space between. The fixing mechanism brings the inner circumferential surface of the barrel hole into close contact with the sleeve without any gap by narrowing the space between the cutout surfaces and deforming the barrel main body.
    Type: Application
    Filed: November 21, 2017
    Publication date: April 5, 2018
    Applicant: Toshiba Kikai Kabushiki Kaisha
    Inventors: Shozo Suzuki, Masatoshi Ohara, Yasuhiro Maekawa