Patents Assigned to Defense Technology Corporation of America
  • Patent number: 7554786
    Abstract: A system and/or an associated method for providing an electronic disabling device with an output having an output waveform other than a sinusoidal waveform (e.g., a damped waveform, a critically damped waveform, a half-cycle uni-pulse output waveform, etc.) and/or for providing the electronic disabling device that can selectively apply the half-cycle uni-pulse output waveform and a sinusoidal output waveform in one device package. In one embodiment, an electronic disabling device includes a power supply coupled to receive an initial power from a battery and a final step-up transformer (e.g., a plain transformer, an autoformer, etc.) adapted to provide an output power having a non-sinusoidal output waveform. In this embodiment, a bridge rectifier is coupled between the power supply and the final step-up transformer to produce the non-sinusoidal output waveform.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: June 30, 2009
    Assignee: Defense Technology Corporation of America
    Inventors: Michael Kramer, Corey Rutz
  • Patent number: 7503260
    Abstract: A non-lethal ammunition comprising a projectile having a nose component, a driving band adjacent the nose component, and a base component, wherein a densified material is used to control weight distribution of the projectile to improve flight, stability and delivered impact energy of the projectile and the nose component includes features to maximize impact surface area. The projectile is positioned within a shell having a high pressure and low pressure propulsion system which minimizes velocity variance of the projectile.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: March 17, 2009
    Assignee: Defense Technology Corporation of America
    Inventor: John A. Kapeles
  • Patent number: 7474518
    Abstract: An electronic disabling device with multiple adjustable power levels and a method of providing the same. The electronic disabling device includes an initial step-up voltage circuit coupled to receive an initial power from a battery and a final step-up transformer (e.g., a plain transformer, an autoformer, etc.) adapted to provide an output power. In addition, a power control circuit is coupled between the initial step-up voltage circuit and the final step-up transformer to adjust the power levels of the output power provided by the final step-up transformer.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: January 6, 2009
    Assignee: Defense Technology Corporation of America
    Inventors: Corey Rutz, Michael Kramer
  • Patent number: 7444940
    Abstract: An ammunition cartridge for an electrical discharge weapon having at least one dart positioned within a dart chamber in the housing. The cartridge has at least one adjustable barrel for selection between close and extended ranges and a joint and port for adjusting pressure in the barrel. In another form the cartridge has two fixed barrels and a retractable deflection ramp for selection between close and extended ranges.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: November 4, 2008
    Assignee: Defense Technology Corporation of America
    Inventors: John Kapeles, John A. Hultman
  • Patent number: 7444939
    Abstract: A primer-fired ammunition cartridge for an electrical discharge weapon having a housing with an exterior surface and two wire-tethered darts positioned within dart chambers in the housing and two electrical contacts positioned on opposite surfaces of the housing for lengthening an electrical arc path across the exterior surface of the housing. The housing can include a flange portion for engaging a chamber in an electrical discharge weapon wherein the flange portion includes an aperture thereby allowing the flange portion to bow and absorb resultant forces between the ammunition cartridge and the chamber of the electrical discharge weapon during firing of the cartridge.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: November 4, 2008
    Assignee: Defense Technology Corporation of America
    Inventors: James F. McNulty, John A. Hultman
  • Patent number: 7237352
    Abstract: An electrical discharge weapon projectile for immobilizing a live target that includes a shock circuit having a low power consumption, a high power efficiency, and/or a low weight. In one embodiment, the projectile includes a high efficiency circuit that would reduce the weights of shock circuits while providing a more effective and safer power level, so that the circuits may be entirely contained within the projectile to eliminate the need for range limiting trailing wires.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: July 3, 2007
    Assignee: Defense Technology Corporation of America
    Inventors: William Arthur Keely, James F. McNulty, Jr.
  • Patent number: 7218501
    Abstract: An electrical discharge weapon for immobilizing a live target that includes a shock circuit having a low power consumption, a high power efficiency, and/or a low weight. The shock circuit may be entirely contained in a projectile without the need for range limiting trailing wires. In one embodiment, the shock circuit includes a high efficiency circuit that recaptures an certain amount of energy that would otherwise be wasted.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: May 15, 2007
    Assignee: Defense Technology Corporation of America
    Inventor: William Arthur Keely
  • Patent number: 6399073
    Abstract: The present invention provides a capsicum containing lachrymator. The lachrymator comprises a nonflammable carrier and capsicum. The nonflammable carrier comprises propylene glycol, ethyl alcohol and water. In one preferred embodiment the lachrymator comprises about 0.3 percent by weight capsicum, about 14.7 percent by weight propylene glycol, about 35 percent by weight ethyl alcohol and about 50 percent by weight water.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: June 4, 2002
    Assignee: Defense Technology Corporation of America
    Inventor: Barry D. Pinkney
  • Patent number: 5834681
    Abstract: A high-low pressure ammunition cartridge includes a case containing a gas expansion chamber and a missile chamber separated from each other by a pressure containment wall containing one or more pressure control ports providing fluid communication between the gas expansion chamber and the missile chamber. The gas expansion chamber is located between the pressure containment wall and a base plate pressed into the back end of the case. The pressure containment wall may either be integral with the case or a separate piece which is removable from the case along with the base plate to facilitate reloading of the cartridge thereby reducing the cost of using the cartridge. The thickness of the base plate may be varied for varying the volume of the gas expansion chamber. Also, the thickness of the gas containment wall and number and size of holes in the gas containment wall may be varied for varying the velocity of the gas entering the missile chamber from the gas expansion chamber.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: November 10, 1998
    Assignee: Defense Technology Corporation of America
    Inventor: David K. DuBay
  • Patent number: 5217708
    Abstract: The present invention provides a capsicum containing lachrymator. The lachrymator comprises a nonflammable carrier and capsicum. The nonflammable carrier comprises propylene glycol, ethyl alcohol and water. In one preferred embodiment the lachrymator comprises about 0.3 percent by weight capsicum, about 14.7 percent by weight propylene glycol, about 35 percent by weight ethyl alcohol and about 50 percent by weight water.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: June 8, 1993
    Assignee: Defense Technology Corporation of America
    Inventor: Barry D. Pinkney