Patents by Inventor Charles J. Cross

Charles J. Cross 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).

  • Multiaxial high cycle fatigue test system
    Patent number: 6718833
    Abstract: A multiaxial high cycle fatigue test system for testing bending, torsion, and tension of a test unit, comprises servo-hydraulic components, including a hydraulic service manifold, two small high frequency actuators along a first axis, and one large main actuator along a second axis The large main actuator is used to apply a radial centrifugal force, and the two small actuators are used to apply vibratory loading; the two small side actuators being offset independently of each other, to enable the machine to apply both bending loads and torque to the test unit. The test unit is subjected to torsion loading when the traverse actuators move in phase, that is when both actuators move either in or out at the same time. The test unit is subjected to bending loading when the actuators move out-of-phase, that is one actuator moves in when the other moves out or vice-versa.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: April 13, 2004
    Assignees: AdTech Systems Research, Inc., The United States of America as represented by the Secretary of the Air Force
    Inventors: Ming Xie, Som R. Soni, Charles J. Cross, Gary E. Terborg
  • Multiaxial high cycle fatigue test system
    Publication number: 20020162400
    Abstract: A multiaxial high cycle fatigue test system for testing bending, torsion, and tension of a test unit, comprises servo-hydraulic components, including a hydraulic service manifold, two small high frequency actuators along a first axis, and one large main actuator along a second axis
    Type: Application
    Filed: February 28, 2002
    Publication date: November 7, 2002
    Inventors: Ming Xie, Som R. Soni, Charles J. Cross, Gary E. Terborg