Patents by Inventor Osamu Doyasu

Osamu Doyasu 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).

  • Regulating device for handling a needle thread in a multi-needle double chain stitch sewing machine
    Patent number: 6729251
    Abstract: A thread taking-up tool is attached to a needle bar sticking out of a sewing machine head, and its leading end has a plurality of thread holes. The thread holes of the thread taking-up tool are arranged in the lateral direction. A thread handling body has a cam face in the vertical direction. Needle threads from a tension device to needles are controlled by the vertical motion of the thread taking-up tool and the action of the cam face of the thread handling body. When the needles ascend from the lowest position, an endless hook attached to the thread taking-up tool is engaged with the left needle thread between the cam face lower end and the thread hole of the thread taking-up tool. Each thread is handled in with the left needle thread staying at the cam face lower end, so that the needle thread loop at the remotest end is absorbed surely.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: May 4, 2004
    Assignee: Pegasus Sewing Machine Mfg. Co., Ltd.
    Inventors: Masahiko Nishikawa, Osamu Doyasu, Hiroyuki Iuchi
  • Regulating device for handling a needle thread in a multi-needle double chain stitch sewing machine
    Publication number: 20030024451
    Abstract: A thread taking-up tool is attached to a needle bar sticking out of a sewing machine head, and its leading end has a plurality of thread holes. The thread holes of the thread taking-up tool are arranged in the lateral direction. A thread handling body has a cam face in the vertical direction. Needle threads from a tension device to needles are controlled by the vertical motion of the thread taking-up tool and the action of the cam face of the thread handling body. When the needles ascend from the lowest position, an endless hook attached to the thread taking-up tool is engaged with the left needle thread between the cam face lower end and the thread hole of the thread taking-up tool. Each thread is handled in with the left needle thread staying at the cam face lower end, so that the needle thread loop at the remotest end is absorbed surely.
    Type: Application
    Filed: July 31, 2002
    Publication date: February 6, 2003
    Inventors: Masahiko Nishikawa, Osamu Doyasu, Hiroyuki Iuchi