Patents by Inventor James Halvorsen

James Halvorsen 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).

  • Combined bore seat face grinding, EDM and lapping method for finishing fuel injector nozzle bodies
    Patent number: 4721839
    Abstract: A combined grinding and EDM apparatus has an indexable rotary turret with four work heads secured thereon to locate a pair of nozzle body blanks with their longitudinal axes in spaced parallelism; and either three or four compound cross and longitudinal slide assemblies carrying grinding tools, lapping tools or non-contact machining tools which work on the blanks to machine the face and to form a valve guide bore and a valve seat shaped as a frustrum of a cone whose axis is concentric with the bore, the valve seat cone surface having a small end diameter to large end diameter ratio in the order of 1-50.
    Type: Grant
    Filed: May 22, 1986
    Date of Patent: January 26, 1988
    Assignee: Ex-Cell-O Corporation
    Inventors: Victor F. Dzewaltowski, James Halvorsen, John M. Check
  • Method of combining grinding and EDM operation for finishing fuel injector nozzle bodies
    Patent number: 4703142
    Abstract: A combined grinding and EDM apparatus has an indexable rotary turret with work heads secured thereon to locate a pair of nozzle body blanks with their longitudinal axes in spaced parallelism; and compound cross and longitudinal slide assemblies carrying either grinding tools or non-contact machining tools which work on the blanks to form a valve guide bore and a valve seat shaped as a frustrum of a cone whose axis is concentric with the bore; the valve seat cone surface having a small end diameter to large end diameter ratio in the order of 1-50.
    Type: Grant
    Filed: May 1, 1986
    Date of Patent: October 27, 1987
    Assignee: Ex-Cell-O Corporation
    Inventors: Victor F. Dzewaltowski, James Halvorsen, John M. Check