Patents Represented by Law Firm Barnes, Kisselle, Raich, Choate, Whittemore & Hulbert
  • 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