Patents by Inventor John G. Harrel

John G. Harrel 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).

  • Boring bar holder and insert with precision placement insert locator means
    Patent number: 5288182
    Abstract: A boring bar holder and removable insert member each equipped with cooperating precision locator means wherein any replacement of the insert within the boring bar holder will index the new insert with precision to the location of the previous insert. There are biasing means associated with the boring bar and the insert to wedgingly move the insert rearwardly to bias against a bore in the boring bar and to index the position of the cutting head of the insert in exact relationship to a previous insert placement.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: February 22, 1994
    Assignee: Circle Machine Company
    Inventors: Harvey L. Patterson, Efren D. Ofalla, John G. Harrel