| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 124003000 | ELECTROMAGNETIC | 16 |
| 20090173328 | Electromagnetic Initiator Coil - The present invention enables the passive initiation of a deployment sequence for a countermeasure payload. The invention comprises an initiator coil that is positioned inside an electromagnetic countermeasure launcher. When the electromagnetic countermeasure launcher electromagnetically generates propulsive force to propel a payload to its deployment position, inductive coupling between one or more propulsion coils of the launcher and the initiator coil induces current to flow in the initiator coil, which thereby initiates the deployment sequence. | 07-09-2009 |
| 20090199830 | Compressed gas projectile accelerator having multiple projectile velocity settings - A compressed gas projectile accelerator that includes a velocity adjustment mechanism and/or method configured to allow the compressed gas projectile accelerator to expel projectiles between a first velocity setting and a second velocity setting. The velocity adjustment mechanism and/or method includes a velocity controller configured to allow a user to selectively select a velocity setting falling between the first velocity setting and the second velocity setting. The first velocity setting comprises an upper or maximum velocity setting and the second velocity setting comprises a lower or minimum velocity setting. | 08-13-2009 |
| 20090314269 | Helical field accelerator - A helical field device that accelerates an object to high velocity by converting rotational kinetic energy in the device into linear kinetic energy in the object, and alternatively, that decelerates objects from high velocity by converting the linear kinetic energy in the object into rotational kinetic energy in the device. The device transfers kinetic energy between the device and an object through the use of a localized high pressure field in the form of a helix having a variable pitch along the length of the device, which couples the object to the device without the pressure field itself significantly contributing energy into the system. Instead, the energy that is used to accelerate the object comes from the kinetic energy imparted to the device by an outside source, such as an engine, or a potential energy storage device. | 12-24-2009 |
| 20100043764 | METHOD FOR QUASI-INSTANTANEOUS POLYMERIZATION OF FILAMENT WOUND COMPOSITE MATERIALS - A method of winding fibers on a mandrel, the wound fibers being in tension, includes providing a source of fibers, imposing a torque on the source that resists dispensing the fibers from the source to exert a tension on the fibers, adding ultra-violet sensitive material that is polymerized by exposure to ultra-violet light to a resin matrix, impregnating dispensed fibers with the additive containing resin matrix, rotating a mandrel to wind the impregnated fibers on the mandrel, the rotation of the mandrel acting to overcome the torque on the source and putting the fibers in tension, and in situ, quasi instantaneously polymerizing the additive containing resin matrix on the mandrel by means of exposing the additive containing resin matrix to ultra-violet light for a selected period of time, such polymerization acting to lock in the tension in the fibers at the time of polymerization. A rail gun fabricated by means of the above method is further included. | 02-25-2010 |
| 20100263648 | Stacked Munitions Launcher and Method Therefor - A system for launching a plurality of projectiles from a single launch tube is disclosed. In the illustrative embodiment, the system uses an electromagnetic catapult to sequentially throw a first projectile and a second projectile. The first projectile is thrown while the second projectile is temporarily restrained within the launch tube. | 10-21-2010 |
| 20110297134 | Projectile launcher - A projectile launcher having a magnet based driver motor. The driver motor is constructed of a coil winding suspended within a magnetic field formed by the combination of a front plate, a magnet and a pole piece attached to a back plate. An electrical controller is electrically coupled to the driver motor and allows for remote operation of the launcher. The coil may include a diaphragm capable of producing sounds wherein electrical current applied to the coil winding causes the coil to vibrate according to an audio frequency to make a desired sound, or travel a predetermined distance so as to cause an ejection of a projectile placed over the coil. | 12-08-2011 |
| 20120000450 | Solid-to-Hybrid Transitioning Armature Railgun With Non-Conforming-To-Prejudice Bore Profile - An improved railgun, railgun barrel, railgun projectile, and railgun system for accelerating a solid-to-hybrid transitioning armature projectile using a barrel having a bore that does not conform to a cross-sectional profile of the projectile, to contact and guide the projectile only by the rails in a low pressure bore volume so as to minimize damage, failure, and/or underperformance caused by plasma armatures, insulator ablation, and/or restrikes. | 01-05-2012 |
| 20120174901 | ACCELERATION OF OBJECTS TO HIGH VELOCITY BY ELECTROMAGNETIC FORCES - Two exemplary approaches to the acceleration of projectiles are provided. Both approaches can utilize concepts associated with the Inductrack maglev system. Either of them provides an effective means of accelerating multi-kilogram projectiles to velocities of several kilometers per second, using launchers of order 10 meters in length, thus enabling the acceleration of projectiles to high velocities by electromagnetic forces. | 07-12-2012 |
| 20120260901 | OPEN RAILGUN WITH STEEL BARREL SECTIONS - An elongated electromagnetic railgun ( | 10-18-2012 |
| 20130333678 | Nontoxic low melting point fusible alloy lubrication of electromagnetic railgun armatures and rails - A railgun which has a conductive lubricant and system of delivery reduces the electrical resistance and friction of the armature-rail sliding contact, thereby decreasing the amount of heat generated at the electrical contact. The conductive lubricant may be a ternary alloy of bismuth, indium and tin. The system of delivery for the conductive lubricant may include a plurality of surface reservoirs formed in either the rail surface, the armature face, or both. | 12-19-2013 |
| 20140060508 | Thermal Management of a Propulsion Circuit in an Electromagnetic Munition Launcher - Apparatus and methods provide thermal management of a propulsion circuit in an electromagnetic munition launcher. | 03-06-2014 |
| 20140116406 | ACCELERATION OF OBJECTS TO HIGH VELOCITY BY ELECTROMAGNETIC FORCES - Two exemplary approaches to the acceleration of projectiles are provided. Both approaches can utilize concepts associated with the Inductrack maglev system. Either of them provides an effective means of accelerating multi-kilogram projectiles to velocities of several kilometers per second, using launchers of order 10 meters in length, thus enabling the acceleration of projectiles to high velocities by electromagnetic forces. | 05-01-2014 |
| 20140209079 | OPEN RAILGUN WITH STEEL BARREL SECTIONS - An elongated electromagnetic railgun ( | 07-31-2014 |
| 20140352676 | LATERALLY OPEN ULTRA-SEGMENTED LINEAR MOTORS - An electromagnetic launcher operable to accelerate launch packages of various transverse sizes, the launcher comprising, in one example, two high-current linear motors having longitudinally extending, laterally open propulsion channels configured to receive and accelerate metal armatures integrated with a launch package; and a power actuated repositioning mechanism for spacing the motors apart as needed. | 12-04-2014 |
| 20150323281 | Electromagnetic Tube Gun - An electromagnetic tube gun is a device for launching a projectile through kinetic energy. The device features a first conductive rail with a first electrical current, a second conductive rail with a second electrical current, an at least one conductive sheet with a cross current, and a magnetic field induction coil with a third electrical current. The at least one conductive sheet connects the first conductive rail and the second conductive rail. The magnetic field induction coil is positioned within a projectile case and placed between the first conductive rail and the second conductive rail. A rail power supply is connected to the first conductive rail and the second conductive rail while a coil power supply is connected to the magnetic field induction coil. Magnetic induction generated by the magnetic field induction coil interacts with the cross current in order to generate a Lorentz force that launches the projectile case. | 11-12-2015 |
| 20160054093 | ELECTROMAGNETIC DEVICE AND METHOD TO ACCELERATE SOLID METAL SLUGS TO HIGH SPEEDS - A device and method to accelerate solid metal slugs to high speeds. In one embodiment, a large electric current is passed through an outer cylindrical metal tube enclosing in part a metal slug, a central electrode, and a conducting tail coupled at opposite ends to the. metal slug and the central electrode. Electromagnetic forces accelerate the metal slug to a point high enough to mechanically separate the conducting tail. On separation, a plasma is generated by the passage of electric current though a gas produced by vaporization of the conducting tail and nearby materials. An insulator enclosed within the tube prevents the plasma from shorting to the outer tube until the current flow has produced a sufficient magnetic field to contain the plasma. The metal slug is then accelerated to high speed by a combination of electromagnetic forces and mechanical pressure from the hot gas through which the electric current is passing. | 02-25-2016 |
