Electrode for electronic weaponry that dissipates kinetic energy
An electronic weapon with an installed deployment unit, from which at least one tethered electrode is launched, provides a stimulus current through a target to inhibit locomotion by the target. The wire tether, also called a filament, conducts the stimulus current. The one or more electrodes, according to various aspects of the present invention, perform one or more of the following functions in any combination: binding the filament to the electrode, deploying the filament from the deployment unit, coupling the electrode to the target, and distributing a current density with respect to a volume of target tissue. An electrode may include a spear comprising a material with integrated conductive and insulative substances (e.g., conductive fibers in insulative composite material) and a geometry to dissipate kinetic energy after impact with the target.
1. An electrode comprising:
a body comprising a surface and a longitudinal axis, a rapidly expanding gas applies a force on the surface to impart a kinetic energy to the electrode to launch the electrode in a forward direction from an electronic weapon along a trajectory toward a human or animal target; and
a spear comprising a first resilient rib, a second resilient rib, and a tip, the tip comprising a longitudinal axis, the spear mechanically coupled to a forward portion of the body; wherein:
upon impact of the electrode with the target:
the tip penetrates tissue of the target to place the spear in or near target tissue;
the body moves away from the trajectory such that an angle between the longitudinal axis of the body and the longitudinal axis of the tip increases until a portion of the body strikes the target to dissipate a portion of the kinetic energy; and
responsive to movement of the body, the first rib compresses and the second rib extends to facilitate movement of the body toward the target and to dissipate a further portion of the kinetic energy; and
the electrode provides a current from the electronic weapon through tissue of the target, the current for inhibiting voluntary movement by the target.
2. A deployment unit for providing a current from a signal generator through tissue of a human or animal target, the current for inhibiting voluntary movement by the target, the deployment unit comprising:
a housing;
an interface that couples the housing to the signal generator, the interface for receiving the current;
a filament that conducts the current, the filament stored in the housing prior to deployment, the filament coupled to the interface for receiving the current; and
the electrode of claim 1 mechanically coupled to the filament and stored in the housing prior to deployment.
3. The electrode of claim 1 wherein the spear diffuses the current into the tissue.
4. The electrode of claim 1 wherein the spear further comprises a barb.
5. The electrode of claim 1 wherein as the one or more ribs deform a rear portion of the body rotates toward the target.
6. The electrode of claim 1 wherein the body and spear are formed of dissimilar composite materials.