Patents by Inventor Richard J. Dumola

Richard J. Dumola 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).

  • Patent number: 5441554
    Abstract: A blended flame spray powder composition is provided for use in producing a bonded wear resistant coating on an aluminum bronze substrate such as a glass mold part. The blended composition comprises a copper-base alloy mixed with a nickel-base alloy, the copper-base alloy powder comprising by weight about 5% to 15% aluminum, about 5% to 30% nickel, 0 to about 1% iron, about 0.1 to 1% silicon and the balance essentially copper. The nickel-base alloy powder comprises by weight 0 to about 0.5% carbon, 0 to about 1% manganese, 0 to about 21.5% chromium, 0 to about 7.5% iron, 0 to about 3.75% columbium, about 0.5% to 3% silicon, 0 to about 9% molybdenum, 0 to about 2% boron, 0 to about 2.5% phosphorus and the balance essentially nickel. The blending ratio of one powder to the other is such that a bonded coating produced therefrom on an aluminum bronze substrate, such as a glass mold part, contains at least about 9% copper and at least about 1.25% aluminum.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: August 15, 1995
    Assignee: Eutectic Corporation
    Inventors: Eduardo Romero, Richard J. DuMola
  • Patent number: 4471034
    Abstract: A method for producing a weld-bonded nickel-base alloy coating on a cast iron part with minimum porosity at the weld interface is provided using a plasma transferred arc process in which the cast iron part is electrically coupled to the plasma-forming circuit, the flow of powder being directed into the plasma arc to the surface of the cast iron part. The method further resides in controlling the deposit of the nickel-base alloy during spraying to maintain a puddle of the alloy between the transfer arc plasma and the cast iron part substrate to protect it from overheating and burning from the transfer arc while promoting a welding reaction between the puddle and the cast iron substrate. The plasma spraying is continued progressively along the cast iron substrate to be coated while maintaining the alloy puddle between the plasma arc and the cast iron until completion of the coating thereof. The invention also relates to a composite article of manufacture.
    Type: Grant
    Filed: November 16, 1982
    Date of Patent: September 11, 1984
    Assignee: Eutectic Corporation
    Inventors: Eduardo Romero, Richard J. Dumola