Patents by Inventor Roy W. Kramer

Roy W. Kramer 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 and apparatus for making a hydrocyclone separation chamber
    Patent number: 5203190
    Abstract: An elongate tubular member with a seamless frusto-conical interior wall surface having a selected taper angle of typically 5.degree. or less which is formed from a metal tubular member of ductile material and circular wall cylinder configuration by the process of sequentially expanding contiguous length segments of the ductile tubular member to an interior frusto-conical wall configuration. The process involves inserting the tubular member into a female die member which defines an interior frusto-conical surface with a selected cone angle of typically 10.degree. or less with the tubular member coaxially aligned with the die member interior surface.
    Type: Grant
    Filed: May 30, 1990
    Date of Patent: April 20, 1993
    Assignee: Sivco, Inc.
    Inventors: Roy W. Kramer, Robert B. Sivyer, Michael J. Thurmond, Daniel P. Lane