Patents by Inventor Michael R. Amspacker

Michael R. Amspacker 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).

  • Hybrid gun barrel
    Patent number: H1365
    Abstract: A new hybrid gun barrel can be successfully used with modern hotter propellants without unacceptable erosion of the breech section of the gun barrel and while retaining the accuracy and ballistic characteristics of a fully rifled gun barrel. The gun barrel comprises a smooth bore breech section and a longer gain twist rifled muzzle section. The smooth bore breech section can better withstand the high heat and pressure of modern hotter propellants than prior art rifled breech sections. The smooth bore breech section will always be less than one-third the total length of the gun barrel and preferably less than one-fifth the total length of the gun barrel. It can be made of a different material than the rifled muzzle section and can be coated with a material harder than the rest of the gun barrel.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: November 1, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Michael R. Amspacker, Nunzio Zummo, Duane Finello