Patents by Inventor Hiroko Ishida

Hiroko Ishida 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).

  • Hoisting and lowering driving engagement multi-row chain
    Patent number: 7980978
    Abstract: A hoisting and lowering driving engagement multi-row chain is disclosed, in which bending of the connecting pins in the chain is suppressed to avoid fatigue failure. Additionally, the load carrying balance in the chain width direction is improved, and contact vibrations and contact noises generated between the chain and the hoisting and lowering sprockets are suppressed. Endurance of the bush in the chain is thereby improved. Bending of connecting pins is avoided by press-fitting bushes, through which connecting pins pass, into intermediate tooth plates. This also improves load carrying balance widthwise. Contact noises and vibrations between the bushes and sprockets are suppressed by providing bushes with a separate sprocket engagement portion having a larger diameter than the press-fitting portion of the bushes.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: July 19, 2011
    Assignee: Tsubakimoto Chain Co.
    Inventors: Toshihiko Takashima, Takeshi Kondo, Tomoyuki Saji, Hiroko Ishida, Masatoshi Sonoda
  • Hoisting and lowering driving engagement multi-row chain
    Publication number: 20090118048
    Abstract: A hoisting and lowering driving engagement multi-row chain is disclosed, in which bending of the connecting pins in the chain is suppressed to avoid fatigue failure. Additionally, the load carrying balance in the chain width direction is improved, and contact vibrations and contact noises generated between the chain and the hoisting and lowering sprockets are suppressed. Endurance of the bush in the chain is thereby improved. Bending of connecting pins is avoided by press-fitting bushes, through which connecting pins pass, into intermediate tooth plates. This also improves load carrying balance widthwise. Contact noises and vibrations between the bushes and sprockets are suppressed by providing bushes with a separate sprocket engagement portion having a larger diameter than the press-fitting portion of the bushes.
    Type: Application
    Filed: October 29, 2008
    Publication date: May 7, 2009
    Inventors: Toshihiko Takashima, Takeshi Kondo, Tomoyuki Saji, Hiroko Ishida, Masatoshi Sonoda