Patents by Inventor Yoichi Kumanda

Yoichi Kumanda 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).

  • Upper fabric feed device for sewing machine, utilizing parallel motion mechanism for reciprocating feed foot and presser foot
    Patent number: 5209172
    Abstract: An upper fabric feed device for a sewing machine, including a feet reciprocating mechanism for reciprocating feed and presser feet for feeding the work fabric on a throat plate. The reciprocating mechanism includes a first swing arm pivoted by a drive device, a pivotally supported parallel motion mechanism, a drive link mechanism which pivotally connects the first swing arm to the parallel motion mechanism, a pivotally supported second swing arm, a first connecting link pivotally connected to the parallel motion mechanism, a triangular lever connected to the first connecting link and second swing arm, and a second and a third connecting link connecting the triangular lever to the feed and presser feet, respectively. The parallel motion mechanism is supported pivotally about one of four apexes of the parallelogram defined by four motion links thereof.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: May 11, 1993
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Yasuhiko Kawaguchi, Yutaka Senda, Masami Ito, Hiroaki Onishi, Yoichi Kumanda