Patents by Inventor Ryuuichi Takenaka

Ryuuichi Takenaka 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).

  • Method of producing a nozzle member for sucking or transporting a string of yarn
    Patent number: 4999901
    Abstract: The invention provides a process of producing a nozzle member for sucking and transporting a string of yarn having an inner diameter which varies along an axial direction of the nozzle member. The process comprises the step of drawing a pipe stock having a predetermined outside profile so as to transfer the outside profile in an axial symmetrical relationship to an inside profile of the pipe stock. By the process, a nozzle member can be produced readily with a high degree of accuracy.
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: March 19, 1991
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Hidenobu Toratani, Tamio Moribe, Ryuuichi Takenaka, Tooru Nakagawa