Patents by Inventor John G. Osburn

John G. Osburn 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).

  • Machine tool lubrication system
    Patent number: 4272216
    Abstract: The control valve for a hydrostatic bearing on a machine tool slide is opened when motion is commanded along the corresponding machine tool axis to eliminate sticking at the start of motion. The valve is closed when the velocity of motion exceeds a predetermined level and is opened again when the velocity drops below the predetermined value to eliminate sticking at the end of motion. The valve is closed again when the machine tool slide arrives at its commanded position.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: June 9, 1981
    Assignee: Kearney & Trecker Corporation
    Inventor: John G. Osburn