Patents by Inventor Harold W. Hannagan

Harold W. Hannagan 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).

  • Tin alloy sheathed explosive device
    Publication number: 20040055495
    Abstract: A substantially lead-free tin alloy composition that may be used with sheathed explosive devices in a variety of linear explosive devices, such as ignition cords, mild detonating cords, and linear shaped charges. The tin alloy may also be used as a liner for shaped explosive devices.
    Type: Application
    Filed: April 22, 2003
    Publication date: March 25, 2004
    Inventors: Harold W. Hannagan, Dennis R. Lee, Philip L. Posson
  • Explosive initiator and method
    Patent number: 4688466
    Abstract: Device and method for initiating an explosive charge, for example in an aircraft canopy jettisoning system. The initiator has an operating handle which is swung from a safe position to an armed position and then pushed to move a slide and actuate a firing mechanism. The device has a low profile and can be used in applications where space is limited.
    Type: Grant
    Filed: September 11, 1986
    Date of Patent: August 25, 1987
    Assignee: Explosive Technology, Inc.
    Inventors: Frank B. Burkdoll, Harold W. Hannagan
  • Pyrotechnic/explosive initiator
    Patent number: 4664033
    Abstract: Pyrotechnic/explosive initiator for use with a detonating cord or fuse comprising an elongated hollow tube with a longitudinally extending channel through which a gaseous percussion wave is propagated. The initiator includes a charge of pyrotechnic or explosive material and a valve for cutting off communication between the gas channel and the charge upon initiation of the charge to prevent gases and other reaction products from being exhausted back into the fuse.
    Type: Grant
    Filed: March 22, 1985
    Date of Patent: May 12, 1987
    Assignee: Explosive Technology, Inc.
    Inventors: Frank B. Burkdoll, Harold W. Hannagan