Patents by Inventor Kent I. Johns

Kent I. Johns 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).

  • Method for hardfacing valves
    Patent number: 4686348
    Abstract: A poppet-type valve having a circumferential seating face including an annular seating area extending between inner and outer radial limits, a circumferential groove formed in the seating face and hardfacing material in the groove, the groove extending radially inwardly from the valve head periphery a sufficient distance beyond the inner radial limit that high temperature deposition of hardfacing material within the groove will not cause substantial dilution by valve head material of the composition of the hardfacing material within the annular seating area.
    Type: Grant
    Filed: April 2, 1985
    Date of Patent: August 11, 1987
    Assignee: Cummins Engine Company, Inc.
    Inventors: Kent I. Johns, Clinton J. Wohlmuth
  • Hardfaced valves and method of making same
    Patent number: 4529169
    Abstract: A poppet-type valve having a circumferential seating face including an annular seating area extending between inner and outer radial limits, a circumferential groove formed in the seating face and hardfacing material in the groove, the groove extending radially inwardly from the valve head periphery a sufficient distance beyond the inner radial limit that high temperature deposition of hardfacing material within the groove will not cause substantial dilution by valve head material of the composition of the hardfacing material within the annular seating area.
    Type: Grant
    Filed: January 7, 1983
    Date of Patent: July 16, 1985
    Assignee: Cummins Engine Company, Inc.
    Inventors: Kent I. Johns, Clinton J. Wohlmuth