Patents by Inventor Thomas M. Keelan

Thomas M. Keelan 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).

  • Internal combustion engine cylinder heads and similar articles of manufacture and methods of manufacturing same
    Patent number: 5354608
    Abstract: A casting for conducting high temperature gases, such as an internal combustion engine cylinder head having to pass combustion exhaust gases therethrough, and a method of manufacturing the same wherein the casting includes a main body portion and a high strength steel exhaust port liner with a heat insulating chamber therebetween filled with hollow ceramic particles. The liner is cast in place thereby affixing the liner to the casting by means of diffusion bonding during the casting of the cast article. The liner and a low heat conductivity insulation blanket of hollow ceramic particles surrounding the liner and an annular steel ring, which serves as a thermally expanding seal between the casting and liner which also allows axial displacement between the casting and liner, are all provided as a unitary mold core prior to the casting of the cast article.
    Type: Grant
    Filed: February 2, 1993
    Date of Patent: October 11, 1994
    Assignee: Detroit Diesel Corporation
    Inventors: Thomas M. Keelan, Stanley J. Hinkle
  • Internal combustion engine cylinder heads and similar articles of manufacture and methods of manufacturing same
    Patent number: 5239956
    Abstract: A casting for conducting high temperature gases, such as an internal combustion engine cylinder head having to pass combustion exhaust gases therethrough, and a method of manufacturing the same wherein the casting includes a main body portion and a high strength steel exhaust port liner with a heat insulating chamber therebetween filled with hollow ceramic particles. The liner is cast in place thereby affixing the liner to the casting by means of diffusion bonding during the casting of the cast article. The liner and a low heat conductivity insulation blanket of hollow ceramic particles surrounding the liner and an annular steel ring, which serves as a thermally expanding seal between the casting and liner which also allows axial displacement between the casting and liner, are all provided as a unitary mold core prior to the casting of the cast article.
    Type: Grant
    Filed: June 7, 1991
    Date of Patent: August 31, 1993
    Assignee: Detroit Diesel Corporation
    Inventors: Thomas M. Keelan, Howell, Stanley J. Hinkle