Patents by Inventor Stanley R. Nelson

Stanley R. Nelson 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 producing high density refractory metal warhead liners from single phase materials
    Patent number: 5523048
    Abstract: A process for producing high density refractory metal warhead liners from near net shape blanks. A shaped mold is filled with pure or solid solution molybdenum or tungsten powders. The powders may be isostatically pressed and sintered to form a near net shape blank. A hot isostatic press may be used in combination with these steps or by itself to form the near net shape blank. The hot isostatic press densifies the near net shape blank to at least 90% of theoretical density. Where wrought properties are desired, a final forging step is performed. Alternatively, a process such as vacuum plasma spraying may be used to form the near net shape blank. A hot isostatic press densifies the near net shape blank. A final machining step achieves a finished refractory metal warhead liner.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: June 4, 1996
    Assignee: Alliant Techsystems Inc.
    Inventors: Jonathan S. Stinson, Stanley R. Nelson, Craig L. Wittman
  • Thin wall steel cartridge cases
    Patent number: 5130207
    Abstract: High strength, high precision thin-walled cartridge cases are manufactured from a metal of interest selected from low alloy and carbon steels utilizing an extrusion and heat treating process. The cartridge blanks are extruded to a length greater than that necessary for the finished cartridge case and are provided with one or more peripheral grooves close to the open end of the extruded cartridge blank to prevent warpage during subsequent heat treatment.
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: July 14, 1992
    Assignee: Alliant Tech Systems Inc.
    Inventor: Stanley R. Nelson
  • Process for creating high strength tubing with isotropic mechanical properties
    Patent number: 5106431
    Abstract: High strength alloy steel cartridge cases characterized by very high isotropic yield strength characteristics are produced from high temperature austenitic conditioned materials by subjecting the materials to a substantial one-pass draw operation and thereafter freezing the materials at approximately -100.degree. F. prior to age hardening.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: April 21, 1992
    Assignee: Alliant Techsystems Inc.
    Inventor: Stanley R. Nelson
  • Process for creating high strength tubing with isotropic mechanical properties
    Patent number: 5082508
    Abstract: High strength alloy steel cartridge cases characterized by very high isotropic yield strength characteristics are produced from high temperature austenitic conditioned materials by subjecting the materials to a substantial one-pass draw operation and thereafter freezing the materials at approximately -100.degree. F. prior to age hardening.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: January 21, 1992
    Assignee: Alliant Techsystems Inc.
    Inventor: Stanley R. Nelson
  • Manufacturing thin wall steel cartridge cases
    Patent number: 5048162
    Abstract: High strength, high precision thin-walled cartridge cases are manufactured from a metal of interest selected from low alloy and carbon steels utilizing an extrusion and heat treating process. The cartridge blanks are extruded to a length greater than that necessary for the finished cartridge case and are provided with one or more peripheral grooves close to the open end of the extruded cartridge blank to prevent warpage during subsequent heat treatment.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: September 17, 1991
    Assignee: Alliant Techsystems Inc.
    Inventor: Stanley R. Nelson