Patents by Inventor Mark E. Majerus

Mark E. Majerus 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).

  • Projector for defeating buried mines
    Patent number: 9157705
    Abstract: An relatively small anti-personnel mine device having a housing about 2 to about 3 inches in diameter, by about 2 to about 4 inches in length, which device projects a dispersion pattern of ? to ? inch diameter hard fragments over at least a 3 to 4 inch radius circle to neutralize a typical, buried, anti-personnel mine. The device contains about 125 to 190 grams of plastic explosive, which when detonated impacts a gas push plate against which an array of the fragments are lodged—the gas push plate and the fragments being encased in a puck shaped matrix of plastic or resin. The effect of the device is such that in addition to neutralizing the mine, the overburden atop the buried mine is expelled exposing the mine, providing enhanced safety in removal and a warning if the mine is daisy-chained to other mines.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: October 13, 2015
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Mark E. Majerus, Richard L. Vanaman, William J. Bergeria
  • Devices and methods for clearance of mines or ordnance
    Patent number: 5936184
    Abstract: Disclosed are devices and methods for the destruction of an explosive device, such as mines and other unexploded ordnance, without the detonation of the explosive device. The devices comprise an explosive charge that penetrates and opens the casing of an explosive device and forces reactive material into the explosive device, thus neutralizing it.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: August 10, 1999
    Assignee: Tracor Aerospace, Inc.
    Inventors: Mark E. Majerus, Ronald L. Brown
  • Shaped-charge device with progressive inward collapsing jet
    Patent number: 5614692
    Abstract: In a shaped-charge device, the liner is so shaped that bulges are formed in the jet without causing the jet to deviate from the central axis. The shaped-charge device includes a case defining an axisymmetrical forwardly-opening cavity uniformly disposed about a central axis; an axisymmetrical, homogeneous-material, liner of variable thickness defining a forwardly-opening cavity having a closed apex, with the cavity being uniformly disposed within the casing about the central axis; and explosive material symmetrically disposed between the casing and the liner. The liner is so shaped that in response to the explosive material being detonated to thereby explode, the liner is progressively collapsed inward by the exploding material to be formed into a fluid jet of the homogeneous liner material that is forwardly expelled at a varying velocity from the casing along the central axis, with the forward portion of the jet being squeezed from the apex of the collapsing liner.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: March 25, 1997
    Assignee: Tracor Aerospace, Inc.
    Inventors: Ronald E. Brown, Mark E. Majerus