Patents by Inventor David D. McDevitt

David D. McDevitt 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).

  • Corrosion-resistant bismuth brass
    Patent number: 5637160
    Abstract: There is provided a machinable .alpha.+.beta. brass containing bismuth and phosphorous. By maintaining the phosphorous content within a critical range, the alloy exhibits good elevated temperature tensile elongation in the temperature range of 100.degree. C.-350.degree. C. without a decrease in machinability due to phosphide formation. In preferred embodiments, the alloy further contains a tin addition for enhanced corrosion resistance. The combination of tin and phosphorous provides enhanced corrosion resistance to the alloy than could be predicted from either addition alone.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: June 10, 1997
    Assignee: Olin Corporation
    Inventors: Andrew J. Brock, John F. Breedis, Jack Crane, Julius C. Fister, Frank N. Mandigo, David D. McDevitt, Mark N. Pearman, Ronald N. Caron
  • Machinable copper alloys having reduced lead content
    Patent number: 5409552
    Abstract: Machinable alpha beta brass having a reduced lead concentration is claimed. The alloy contains bismuth to improve machinability. Either a portion of the zinc is replaced with aluminum, silicon or tin, or a portion of the copper is replaced with iron, nickel or manganese.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: April 25, 1995
    Assignee: Olin Corporation
    Inventors: David D. McDevitt, Jacob Crane, John F. Breedis, Ronald N. Caron, Frank N. Mandigo, Joseph Saleh
  • Machinable copper alloys having reduced lead content
    Patent number: 5288458
    Abstract: Machinable alpha beta brass having a reduced lead concentration is claimed. The alloy contains bismuth to improve machinability. Either a portion of the zinc is replaced with aluminum, silicon or tin, or a portion of the copper is replaced with iron, nickel or manganese.
    Type: Grant
    Filed: July 1, 1992
    Date of Patent: February 22, 1994
    Assignee: Olin Corporation
    Inventors: David D. McDevitt, Jacob Crane, John F. Breedis, Ronald N. Caron, Frank N. Mandigo, Joseph Saleh
  • Machinable copper alloys having reduced lead content
    Patent number: 5137685
    Abstract: Machinable copper alloys having a reduced lead concentration are disclosed. An additive to the alloy accumulates both at the grain boundaries and intragranularly. The additive facilitates chip fracture or lubricates the tool. One additive is a mixture of bismuth and lead with the lead concentration below about 2% by weight.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: August 11, 1992
    Assignee: Olin Corporation
    Inventors: David D. McDevitt, Jacob Crane, John F. Breedis, Ronald N. Caron, Frank N. Mandigo, Joseph Saleh