Patents by Inventor Hiroyuki Ohi

Hiroyuki Ohi 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).

  • Ceramic-metal friction welding member and ceramic cast-in bonded piston made thereof
    Patent number: 5144885
    Abstract: A ceramic-metal friction welded member includes a ceramic member formed with an annular notch in an outer circumference of its surface and a metal member joined onto the annular notch of the ceramic member by friction welding. A ceramic cast-in bonded piston includes a crown made of a ceramic material having an annular notch formed in an outer circumference of its surface, a metal annular member joined onto the annular notch of the crown by friction welding, and a piston main body made of an aluminum alloy surrounding the crown by cast-in bonding. A ceramic cast-in bonded piston includes a crown made of a ceramic material, a piston main body made of an aluminum alloy surrounding the crown by cast-in bonding, and an annular member made of a metal different from aluminum and joined by friction welding to an outer circumference of a surface of the crown in contact with the piston main body.
    Type: Grant
    Filed: September 13, 1991
    Date of Patent: September 8, 1992
    Assignee: NGK Insulators, Ltd.
    Inventors: Tomio Suzuki, Hiroyuki Ohi