Patents by Inventor Lee R. Hardt

Lee R. Hardt 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).

  • Patent number: 10890425
    Abstract: Embodiments are directed to a vented torque release device including hollow fuze well having a proximal end, a distal end, an inner surface, and an outer surface. A wall is defined by the inner surface and the outer surface. A plurality of vents are axially spaced at equal distance about the outer surface.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: January 12, 2021
    Assignee: The United States of America, as Represented by the Secretary of the Navy
    Inventors: Benjamin M. Blazek, Lee R. Hardt, Carl A. Weinstein
  • Patent number: 10724836
    Abstract: The disclosed embodiments are directed to enhancing insensitive munitions performance. Some of the embodiments employ an outgassing pad having unique geometrical configurations, compositions, and positioning. Other embodiments rely on using thermally-releasable components to foster billet expulsion. Additional embodiments combine both aspects into entire cook-off mitigation systems for insensitive munitions improvements.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: July 28, 2020
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Lee R. Hardt, Donald L. Burnett, Josiah S. Garfield, Robert A. Koontz, Eric K. Wooding, Que T. BuiDang
  • Patent number: 10634474
    Abstract: Embodiments are directed to a shock mitigation device including a hollow fuze well having an inner surface and an outer surface. A plurality of vents are axially spaced at equal distance about the outer surface. A shock dampening liner is affixed to the inner surface. A shock dampening ring is concentric about the hollow fuze well.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: April 28, 2020
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Benjamin M. Blazek, Lee R. Hardt, Carl A. Weinstein
  • Patent number: 10408594
    Abstract: Embodiments are directed to a shock mitigation device including a hollow fuze well having an inner surface and an outer surface. A plurality of vents are axially spaced at equal distance about the outer surface. A shock dampening liner is affixed to the inner surface. A shock dampening ring is concentric about the hollow fuze well.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: September 10, 2019
    Assignee: The United States of America, as Represented by the Secretary of the Navy
    Inventors: Benjamin M. Blazek, Lee R. Hardt, Carl A. Weinstein
  • Patent number: 10408593
    Abstract: Embodiments are directed to a vented torque release device including hollow fuze well having a proximal end, a distal end, an inner surface, and an outer surface. A wall is defined by the inner surface and the outer surface. A plurality of vents are axially spaced at equal distance about the outer surface.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: September 10, 2019
    Assignee: The United States of America, as Represented by the Secretary of the Navy
    Inventors: Benjamin M. Blazek, Lee R. Hardt, Carl A. Weinstein
  • Patent number: 10228223
    Abstract: Embodiments of the invention are directed to enhancing insensitive munitions performance. Some embodiments of the invention employ an outgassing pad having unique geometrical configurations and positioning. Other embodiments rely on using thermally-releasable components to foster billet expulsion. Additional embodiments combine both aspects into an entire cook-off mitigation system.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: March 12, 2019
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Lee R. Hardt, Donald L. Burnett, Josiah S. Garfield, Robert A. Koontz
  • Patent number: 10175034
    Abstract: Embodiments of the invention are directed to enhancing insensitive munitions performance. Some embodiments of the invention employ an outgassing pad having unique geometrical configurations and positioning. Other embodiments rely on using thermally-releasable components to foster billet expulsion. Additional embodiments combine both aspects into an entire cook-off mitigation system.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: January 8, 2019
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Lee R. Hardt, Donald L. Burnett, Josiah S. Garfield, Robert A. Koontz
  • Patent number: 10101139
    Abstract: Embodiments of the invention are directed to enhancing insensitive munitions performance. Some embodiments of the invention employ an outgassing pad having unique geometrical configurations and positioning. Other embodiments rely on using thermally-releasable components to foster billet expulsion. Additional embodiments combine both aspects into an entire cook-off mitigation system.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 16, 2018
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Lee R. Hardt, Donald L. Burnett, Josiah S. Garfield, Robert A. Koontz
  • Patent number: 10088285
    Abstract: Embodiments of the invention are directed to enhancing insensitive munitions performance. Some embodiments of the invention employ an outgassing pad having unique geometrical configurations and positioning. Other embodiments rely on using thermally-releasable components to foster billet expulsion. Additional embodiments combine both aspects into an entire cook-off mitigation system.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 2, 2018
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Lee R. Hardt, Donald L. Burnett, Josiah S. Garfield, Robert A. Koontz
  • Patent number: 5212340
    Abstract: A safe and arm device, which has an explosive train interrupted by a void establish a safe condition, has the void filled with a liquid explosive to establish an armed condition. The void may be in a manometer-like device in which the liquid explosive is motivated by fluid pressure corresponding to free-fall or other velocities. The void may be a chamber portion filled with the liquid explosive by expansion of a bladder. Premature arming may be prevented by forming the explosive liquid from nonexplosive liquids mixed by rupture of a bladder or by melting a solid explosive with heat generated electrically or provided from ram air or combustion.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: May 18, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Lee R. Hardt, Donald R. Burnett
  • Patent number: 5153370
    Abstract: A safe and arm device, which has an explosive train interrupted by a void establish a safe condition, has the void filled with a liquid explosive to establish an armed condition. The void may be in a manometer-like device in which the liquid explosive is motivated by fluid pressure corresponding to free-fall or other velocities. Premature arming may be prevented by forming the explosive liquid by melting a solid explosive with heat generated electrically. A selectively variable arming time delay may be provided by a variable orifice controlling the flow of the liquid explosive or by varying the temperature of the liquid to select its viscosity.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: October 6, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Lee R. Hardt
  • Patent number: 5153369
    Abstract: A safe and arm device, which has an explosive train interrupted by a void establish a safe condition, has the void filled with a liquid explosive to establish an armed condition. The void may be in a device in which the liquid explosive is motivated by fluid pressure corresponding to free-fall or other velocities. The void may be a chamber portion filled with the liquid explosive by expansion of a bladder. Premature arming may be prevented by forming the explosive liquid from nonexplosive liquids mixed by rupture of a bladder or by melting a solid explosive.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: October 6, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Lee R. Hardt, Donald L. Burnett
  • Patent number: 5083041
    Abstract: A safe and arm device with a thermomagnetic generator sharing a tubular sed shaft with a turbine. Weapon propellant exhaust gas enters the shaft and heats thermomagnets in the generator causing their magnetism to be produced and flux lines to flow from rotor to stator. The gas moves translationally through the shaft and into the turbine. The gas leaving the turbine rotationally is discharged into a radial exhaust tube. A plug in the tube must be removed to permit gas exhaust from the turbine. Only then can the turbine and connected generator rotate causing the thermomagnetically produced flux lines of the rotor to be cut by the stator resulting in an induced voltage out of the generator.
    Type: Grant
    Filed: January 5, 1990
    Date of Patent: January 21, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Lee R. Hardt, James E. Means
  • Patent number: 5033270
    Abstract: An actuator, which directly converts fluid pressure to rotary movement, has generally cylindrical and helically fluted circumferential wall, an end wall bearing an output member, and a fixed opposite end wall. The actuator may be a one-shot device providing substantial torque and driving the output member through a relatively wide angle by having a pyrotechnic gas generating charge mounted inwardly of the fixed end wall and by exceeding the elastic limit of the circumferential wall which is metallic to so as to withstand pyrotechnically generated gas.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: July 23, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Lee R. Hardt
  • Patent number: 5012740
    Abstract: An impact switch having a housing containing a rigid coaxial conductor ening one end. An inner cylindrical contact extends axially inward from and beyond the in housing end of an outer tubular contact which has a spiral spring extending axially from within a recess therein. The free end of the spring supports a mass spaced from the end of the inner contact. The contacts, spring and mass are enclosed within a flexible shroud spaced from the inner wall of the housing. The space between the shroud and housing contains an electrorheological fluid, the viscosity of which is a function of the voltage supplied by two electrodes extending through the housing and into the fluid. The voltage controlled viscosity permits control of damping of the shroud, mass, and spring movements in response to impact caused switch deceleration and control of time for switch closure and fuze delay by means of mass contact with the inner cylindrical contact, or spring contact with the outer tubular contact.
    Type: Grant
    Filed: January 5, 1990
    Date of Patent: May 7, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Lee R. Hardt
  • Patent number: 4899659
    Abstract: A safe and arm device having a bellows motor-driven rotor bearing a detonr. When the device is in the SAFE condition the detonator is shrouded by an airpot piston extending from one end of a spring secured within the airpot cylinder in the housing. The airpot piston compresses the spring in response to weapon acceleration until the piston fully resides in the airpot cylinder in the device housing. The rotor is thus free to be rotated overriding a detent maintaining the SAFE condition by the action of the bellows motor which is electrically activated. The rotor turns until it reaches the "ARMED" position where the detonator therein is positioned directly in line with weapon's warhead explosive trigger charge in the housing. The rotor is rotationally secured relative to the housing in the "ARMED" position by the action of another detent.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: February 13, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Lee R. Hardt