Patents by Inventor Patrick F. Spahn

Patrick F. Spahn 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).

  • Booster explosive rings
    Patent number: 5233929
    Abstract: An explosive device has a main charge explosive, and a booster explosive ring with main charge explosive filling the space in the center of the booster ring. When the booster explosive is set off, explosive shock waves converge on the space in the center of the ring, thus initiating the main charge explosive.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: August 10, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Patrick F. Spahn
  • Embedded can booster
    Patent number: 5221810
    Abstract: In an explosive device having a main charge explosive, a booster explosive mbedded in the main charge explosive, and a detonator, a can or plate is embedded in the main charge explosive and provides a high impedance surface which is shaped and oriented so that shock waves from the booster explosion will strike the high impedance surface at normal incidence and be reflected back toward the booster explosion. This increases the pressure in the main charge explosive material between the booster explosive and the can or plate, thus increasing the effectiveness of the booster explosive.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: June 22, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Patrick F. Spahn