Patents by Inventor Douglas E. Ayer

Douglas E. Ayer 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).

  • Shaped charge perforator
    Patent number: 5279228
    Abstract: Shaped charge perforators are provided which include a metal tube having a first closed end and containing a high energy explosive. The closed end includes a detonation device for providing an initiation charge to the high energy explosive. The tube further includes, at its unconstrained end, a liner comprising a liner metal having a density greater than about 10 g/cc. The liner forms a depression in the exposed end of the metal tube.
    Type: Grant
    Filed: April 23, 1992
    Date of Patent: January 18, 1994
    Assignee: Defense Technology International, Inc.
    Inventor: Douglas E. Ayer