Patents by Inventor Kiyohiro Hirakawa

Kiyohiro Hirakawa 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).

  • Anti-skid device for preventing slippage of automobile tire
    Patent number: 4815513
    Abstract: An anti-skid device for preventing slippage of a wheel is disclosed. The anti-skid device comprises a cylindrical expandable member disposed on a tread portion of a tire, and compressed fluid supplying means. The expandable member has anti-skid members implanted at a radially outer portion of the expandable member, and the expandable member is formed with a hole at a radially inner portion thereof. The compressed fluid supply means is connectable to the hole of the expandable member. The expandable member is expanded upon supply of compressed fluid into the hole, and is shrunk upon discharge of the compressed fluid therefrom.
    Type: Grant
    Filed: September 3, 1987
    Date of Patent: March 28, 1989
    Inventor: Kiyohiro Hirakawa