Patents by Inventor Robert Krczal

Robert Krczal 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).

  • Cylinder head for internal combustion engine
    Patent number: 4487175
    Abstract: An aluminum cylinder head for an internal combustion engine has a layer of material of dispersion-hardened sintered aluminum disposed in its bottom wall which forms a combustion chamber wall, the layer comprising an insert or inserts at the sealing surface which delimits the combustion chamber and at the bridge between the intake and exhaust ports in the head for increasing the resistance of the head member to thermal shock at the bridge and for retaining for the sealing surface a high residual hardness at elevated temperatures.
    Type: Grant
    Filed: January 8, 1982
    Date of Patent: December 11, 1984
    Assignee: Kl/o/ ckner-Humboldt-Deutz AG
    Inventor: Robert Krczal