Patents by Inventor Hugh N. Evans

Hugh N. Evans 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).

  • Gas-lubricated bearings
    Patent number: 4157465
    Abstract: The spiral grooving of a thrust-plate of an aerodynamic gas-lubricated bearing is formed by ionic bombardment of a flat face of a machined blank. The face is masked to leave exposed only those areas where material is to be removed. Grooving on a cylindrical surface of a spindle is similarly formed, the cylindrical blank being rotated to present the unmasked areas successively and repeatedly for bombardment.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: June 5, 1979
    Assignee: Smiths Industries Limited
    Inventors: Geoffrey Beardmore, Hugh N. Evans