Patents by Inventor Yositaka Takahasi

Yositaka Takahasi 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).

  • Fe-based alloy powder adapted for sintering, Fe-based sintered alloy having wear resistance, and process for producing the same
    Patent number: 5512080
    Abstract: Disclosed are an Fe-based alloy powder adapted for sintering, an Fe-based sintered alloy, and a process for producing the Fe-based sintered alloy. The Fe-based alloy powder or the matrix of the Fe-based sintered alloy consists, percent by weight, essentially of 2.0 to 15% Co, 2.0 to 10% Mo, and the balance of Fe and inevitable impurities. The Fe-based alloy powder exhibits superb compressibility and corrosion resistance, and accordingly the Fe-based sintered alloy made therefrom exhibits excellent wear resistance, corrosion resistance and oxidation resistance. The Fe-based sintered alloy is further improved in the excellent properties by dispersing novel Ni-based alloy hard particles in the matrix.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: April 30, 1996
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yositaka Takahasi, Akira Manabe, Tadataka Kaneko, Hiroshi Okajima, Yoshihiko Ito, Setsuto Daiza
  • Fe-based sintered alloy having wear resistance
    Patent number: 5489324
    Abstract: Disclosed are an Fe-based alloy powder adapted for sintering, an Fe-based sintered alloy, and a process for producing the Fe-based sintered alloy. The Fe-based alloy powder or the matrix of the Fe-based sintered alloy consists, percent by weight, essentially of 2.0 to 15% Co, 2.0 to 10% Mo, and the balance of Fe and inevitable impurities. The Fe-based alloy powder exhibits superb compressibility and corrosion resistance, and accordingly the Fe-based sintered alloy made therefrom exhibits excellent wear resistance, corrosion resistance and oxidation resistance. The Fe-based sintered alloy is further improved in the excellent properties by dispersing novel Ni-based alloy hard particles in the matrix.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: February 6, 1996
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yositaka Takahasi, Akira Manabe, Tadataka Kaneko, Hiroshi Okajima, Yoshihiko Ito, Setsuto Daiza