Patents by Inventor Leonard W. Biera

Leonard W. Biera 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).

  • Valve seat bushing machining apparatus
    Patent number: 5044841
    Abstract: Apparatus for machining a valve seat and valve stem guide all from the valve seat side of a head or block. The valve seat is machined in one pass by a single point cutting tool which is moved on two axes and, the valve guide bore is machined by a reamer. The movements of the single point cutting tool and reamer are numerically controlled.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: September 3, 1991
    Assignee: Litton Industrial Automation Systems, Inc.
    Inventors: Leonard W. Biera, William F. Crawford, John Kobane, Jr., Jack R. Settimo