Patents by Inventor Walter H. Stevens

Walter H. Stevens 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).

  • Lead-free primed rimfire cartridge
    Patent number: 5216199
    Abstract: A method of manufacturing an improved lead-free primed rimfire cartridge for ammunition or industrial powerloads providing a gas source for driving fasteners with power-fastening tools. A lead-free priming mixture is consolidated into an annular cavity of a rimfire casing and dried in the cavity. The primer is secured in the cavity by tamping at least a portion of propellant into the casing against and over the dried primer. The tamping pressure per casing may range from 1,300 psi to 8,800 psi. Any remaining portion of required propellent is added over the tamped compacted propellant layer. The ammunition and powerload casings are then sealed and finished in a conventional manner. A rimfire cartridge for both ammunition and industrial powerload applications manufactured as described above is also provided.
    Type: Grant
    Filed: July 8, 1991
    Date of Patent: June 1, 1993
    Assignee: Blount, Inc.
    Inventors: Robert K. Bjerke, Kenneth P. Kees, James P. Ward, Walter H. Stevens