Patents by Inventor Michael E. Dandorph

Michael E. Dandorph 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).

  • Gear material for an enhanced rotorcraft drive system
    Patent number: 8758527
    Abstract: A surface processing method includes the step of increasing a surface hardness of a metal having a nominal composition that includes about 0.21-0.25 wt % carbon, about 2.9-3.3 wt % chromium, about 11-12 wt % nickel, about 13-14 wt % cobalt, about 1.1-1.3 wt % molybdenum, and a balance of iron from a first hardness to a second hardness. For example, the method is used to produce a surface-hardened component that includes a core section having a first hardness between about 51 HRC and 55 HRC and a case section having a second hardness that is greater than the first hardness.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: June 24, 2014
    Assignee: Sikorsky Aircraft Corporation
    Inventors: Tapas K. Mukherji, Michael E. Dandorph, Bruce D. Hansen, Edward J. Karedes
  • GEAR MATERIAL FOR AN ENHANCED ROTORCRAFT DRIVE SYSTEM
    Publication number: 20080145690
    Abstract: A surface processing method includes the step of increasing a surface hardness of a metal having a nominal composition that includes about 0.21-0.25 wt % carbon, about 2.9-3.3 wt % chromium, about 11-12 wt % nickel, about 13-14 wt % cobalt, about 1.1-1.3 wt % molybdenum, and a balance of iron from a first hardness to a second hardness. For example, the method is used to produce a surface-hardened component that includes a core section having a first hardness between about 51 HRC and 55 HRC and a case section having a second hardness that is greater than the first hardness.
    Type: Application
    Filed: December 15, 2006
    Publication date: June 19, 2008
    Inventors: Tapas K. Mukherji, Michael E. Dandorph, Bruce D. Hansen, Edward J. Karedes