Patents by Inventor Shuzou Morimoto

Shuzou Morimoto 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).

  • Sewing machine with bobbin thread tension adjusting device
    Patent number: 4458613
    Abstract: A sewing machine having a drive shaft rotated by a machine motor to vertically reciprocate a needle carrying an upper thread is provided with a device for adjusting the tension of a lower thread pulled out from a bobbin located in a bobbin carrier of the sewing machine. The device includes a tension lever cooperated with a spring element, and a releasing lever which is in engagement with a cam rotated by the drive shaft. The position of the tension lever relative to the lower thread is effected by a manually operated dial and a cam engageable with the spring element. The releasing lever is adapted to intermittently release the tension lever from the lower thread during the stitching operation.
    Type: Grant
    Filed: April 20, 1981
    Date of Patent: July 10, 1984
    Assignee: Janome Sewing Machine Co., Ltd.
    Inventors: Yasukata Eguchi, Susumu Hanyu, Shuzou Morimoto