Patents by Inventor Saki Ishikawa

Saki Ishikawa 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).

  • Needle plate detachable mechanism and sewing machine having needle plate detachable mechanism
    Patent number: 10787759
    Abstract: In order to improve detachability of a needle plate, a needle plate detachable mechanism has a needle plate which is provided on a bed part of the sewing machine and made of a magnetic body; a magnet which is provided below the needle plate for fixing the needle plate by magnetic force; and a magnetic force changing mechanism which is connected with the magnet for changing the magnetic force acting on the needle plate by relatively moving the magnet with respect to the needle plate.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: September 29, 2020
    Assignee: JANOME SEWING MACHINE CO., LTD.
    Inventors: Saki Ishikawa, Koji Maeda
  • Needle plate detachable mechanism and sewing machine having needle plate detachable mechanism
    Patent number: 10787758
    Abstract: In order to prevent a replacement of the needle plate in the situation not suitable for replacing the needle plate, a needle plate detachable mechanism has a needle plate fixing unit capable of being switched between a fixed state where a needle plate is fixed to a sewing machine body and an unfixed state where the fixed state is released; and a switching mechanism which is connected with the needle plate fixing unit for switching the needle plate fixing unit between the fixed state and the unfixed state, wherein the needle plate fixing unit is prevented from being switched when the needle is positioned below an upper surface of the needle plate or when the sewing machine motor is driven.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: September 29, 2020
    Assignee: JANOME SEWING MACHINE CO., LTD.
    Inventors: Saki Ishikawa, Koji Maeda
  • NEEDLE PLATE DETACHABLE MECHANISM AND SEWING MACHINE HAVING NEEDLE PLATE DETACHABLE MECHANISM
    Publication number: 20190352826
    Abstract: In order to prevent a replacement of the needle plate in the situation not suitable for replacing the needle plate, a needle plate detachable mechanism has a needle plate fixing unit capable of being switched between a fixed state where a needle plate is fixed to a sewing machine body and an unfixed state where the fixed state is released; and a switching mechanism which is connected with the needle plate fixing unit for switching the needle plate fixing unit between the fixed state and the unfixed state, wherein the needle plate fixing unit is prevented from being switched when the needle is positioned below an upper surface of the needle plate or when the sewing machine motor is driven.
    Type: Application
    Filed: March 8, 2019
    Publication date: November 21, 2019
    Inventors: Saki Ishikawa, Koji Maeda
  • NEEDLE PLATE DETACHABLE MECHANISM AND SEWING MACHINE HAVING NEEDLE PLATE DETACHABLE MECHANISM
    Publication number: 20190352827
    Abstract: In order to improve detachability of a needle plate, a needle plate detachable mechanism has a needle plate which is provided on a bed part of the sewing machine and made of a magnetic body; a magnet which is provided below the needle plate for fixing the needle plate by magnetic force; and a magnetic force changing mechanism which is connected with the magnet for changing the magnetic force acting on the needle plate by relatively moving the magnet with respect to the needle plate.
    Type: Application
    Filed: March 8, 2019
    Publication date: November 21, 2019
    Inventors: Saki ISHIKAWA, Koji MAEDA