Patents by Inventor Lawrence E. Hart

Lawrence E. Hart 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).

  • Gyratory shear material compacting device
    Patent number: 5275056
    Abstract: A gyratory shear material compacting device in which a material sample is placed within a cylindrical mold having a wobble plate. The material sample is compressed by a piston while the mold is simultaneously gyrated. Gyration is achieved by tilting the mold and holding the wobble plate within rollers which revolve around the mold, controlling the selected angle of tilt while imparting oscillatory gyration. The selected angle of tilt of the mold may be precisely controlled at all times, preventing the mold from riding up on the sample, or from coming into contact with the base of the device. The mold is free to advance rotationally. The device is capable of measuring and recording the height of the sample, angle of gyration, and moment of gyration.
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: January 4, 1994
    Assignee: Rainhart Co.
    Inventors: Edward R. Hamilton, Raymond D. Alexander, Lawrence E. Hart