Abstract: A portable device for drawing the bowstring of a crossbow. The cocking device may be designed to prevent the uneven drawing of the crossbow and may eliminate the complex installation process typically required to retro-fit an existing crossbow with known cocking devices.

Abstract: One or more techniques and/or systems are disclosed for an arrow extractor. The arrow extractor can comprise a first and a second elongated lever that are in rotatable engagement with each other. The respective elongated levers comprise a first end configured to be manipulated by a user, and a second end that comprises a tool configured to engage a first and second part of a gripper. The gripper comprises an elongated cavity that can be configured to grip the shaft of an arrow. The first tool and the second tool are engaged with the gripper, and when the user applies a grasping force to the first end of the respective levers, the grasping force may also applied to the gripper, thereby gripping the shaft of the arrow, which may then be extracted from an object using the levers.

Abstract: One or more techniques and/or systems are disclosed for a nock device that may be used on an arrow. A top portion a nock device can comprise one or more pairs of string guide impression on its top surface, where the respective one or more pairs of string guide impressions may be symmetrically arranged on the top surface, with respect to each other. A first pair of string guide impression can be disposed along a first bisecting line on the top surface, and, if present, a second pair of string guide impressions can be disposed along a second bisecting line on the top surface. The respective one or more pairs of string guide impression can be configured to receive a bowstring, where the first pair may receive the bowstring in a first orientation, and the second pair, if present, may receive the bowstring in a second orientation.

Abstract: Provided is a crossbow riser that may comprise a plurality of cells defined by walls. The walls may consist essentially of a material wherein the yield tensile strength at 0.2% strain is greater than 780 MPa, and either the specific strength is greater than 200 kN·m/kg, or the density is less than 6.0 g/cc. The cells may collectively define a first volume. The walls may collectively define a second volume. The ratio of the first volume to the second volume may be greater than 1.5.

Abstract: A crossbow may comprise a safety device that provides the user a visual means other than the mechanical positioning of the various components of the crossbow to quickly and accurately determine the firing condition of the crossbow. The safety device may comprise an illuminated marker that emits a specific color of light to denote the firing condition of the crossbow. In another embodiment, the safety device may comprise a mechanical assembly that is raised and lowered to denote the firing condition of the crossbow. In yet another embodiment, the safety device may comprise an electric switch that causes an illuminated marker to emit a light or a mechanical assembly to raise or lower in order to denote the firing condition of the crossbow.

Abstract: A cocking device for drawing the bowstring of a crossbow that can be selectively installed on an existing crossbow. The cocking device comprises a shape designed to prevent the cocking device from being improperly installed.

Abstract: A crossbow may include a crossbow barrel having reduced weight and increased strength and shock resistance to the crossbow. This invention may also aid in improving torsional resistance, improving specific stiffness, and increasing compresses strength. The invention may also reduce friction between a barrel and a bow string to increase bow string life. The invention may also reduce the friction between a barrel and a bow to allow added arrow distance. Additionally, the crossbow may decrease both vibration and sound.

Abstract: A system, a method and a computer readable storage medium for pre-processing data collected from one or more data sources more accurately summarize data. During the pre-processing, multiple raw data are summarized into a pre-processed datum. By using the pre-processed data entries, more accurate trend data may be generated. Alternatively, data entries are indexed and selectively retrieved based on indices. Decimation of data points are performed based on the indices without retrieving all the data sets from the database, reducing the data access time for returning a query result. Additional data sets may also be retrieved efficiently from the database using the indices.

Abstract: A crossbow may include a main beam; a compound bow assembly mounted to the main beam; and, a trigger mechanism mounted to the main beam for use in holding a bowstring in a cocked position. The crossbow may include wheels at opposite ends of the bow that operatively receive the bowstring. The wheels may be separated by a wheel distance (WD) when the crossbow is in an un-cocked position. The crossbow may also have a power stroke distance (PD) and the ratio WD/PD may be less than 2.0.

Abstract: A crossbow may include a main beam; a compound bow assembly mounted to the main beam; and, a trigger mechanism mounted to the main beam for use in holding a bowstring in a cocked position. The crossbow may include wheels at opposite ends of the bow that operatively receive the bowstring. The wheels may be separated by a wheel distance (WD) when the crossbow is in an un-cocked position. The crossbow may also have a power stroke distance (PD) and the ratio WD/PD may be less than 2.0.

Abstract: A crossbow may include a main beam; a compound bow assembly mounted to the main beam; and, a trigger mechanism mounted to the main beam for use in holding a bowstring in a cocked position. The crossbow may include wheels at opposite ends of the bow that operatively receive the bowstring. The wheels may be separated by a wheel distance (WD) when the crossbow is in an un-cocked position. The crossbow may also have a power stroke distance (PD) and the ratio WD/PD may be less than 2.0.

Abstract: An antenna assembly for receiving the GPS signals in a global positioning system (GPS) receiver module automatically orients the antenna to better receive the GPS signals. The antenna is oriented by a positioner (e.g., a counterweight) that automatically rotates a frame on which the antenna is mounted. The GPS receiver module may also include multiple antennas oriented in different directions to maintain good reception of the GPS signals in any position. The multiple antennas are oriented in a manner so that the poor reception range an antenna is covered by other antennas. Signals from multiple antennas may be combined or chosen for processing by a GPS processor. Also, multiple GPS receiver modules may be deployed in close proximity so that wireless communication between the GPS receiver modules may be established.

Abstract: A crossbow may comprise a main beam, a trigger mechanism, a bow assembly, and a barrel cable suppressor. The trigger mechanism may be mounted to the main beam for selectively retaining and releasing a bowstring. The bow assembly may extend transversely from a distal end of the main beam and may comprise a first limb, a second limb, a cam assembly, the bowstring, a first cable, and a second cable. The cam assembly may comprise a first cam, wherein the first cam is operatively connected to an end of the first limb to rotate about a first axle; and, a second cam, wherein the second cam is operatively connected to an end of the second limb to rotate about a second axle. The bowstring may extend between the first and second limbs and may be received by the first and second cams such that the drawing of the bowstring causes the first and second cams to rotate in a first direction. The first cable may be operatively connected to the end of the first limb and may be received by the second cam.

Abstract: An antenna assembly for receiving the GPS signals in a global positioning system (GPS) receiver module automatically orients the antenna to better receive the GPS signals. The antenna is oriented by a positioner (e.g., a counterweight) that automatically rotates a frame on which the antenna is mounted. The GPS receiver module may also include multiple antennas oriented in different directions to maintain good reception of the GPS signals in any position. The multiple antennas are oriented in a manner so that the poor reception range an antenna is covered by other antennas. Signals from multiple antennas may be combined or chosen for processing by a GPS processor. Also, multiple GPS receiver modules may be deployed in close proximity so that wireless communication between the GPS receiver modules may be established. The GPS receiver modules with good GPS signals reception may determine its location and send its location information to the GPS modules with poor or no signal reception.

Abstract: Method and apparatus for improving RF signal performance of a battery-operated handheld device includes RF isolating the battery from DC-powered circuitry and actively incorporating the battery in RF signal transfers with respect to an RF antenna.

Abstract: An antenna assembly for receiving the GPS signals in a global positioning system (GPS) receiver module automatically orients the antenna to better receive the GPS signals. The antenna is oriented by a positioner (e.g., a counterweight) that automatically rotates a frame on which the antenna is mounted. The GPS receiver module may also include multiple antennas oriented in different directions to maintain good reception of the GPS signals in any position. The multiple antennas are oriented in a manner so that the poor reception range an antenna is covered by other antennas. Signals from multiple antennas may be combined or chosen for processing by a GPS processor. Also, multiple GPS receiver modules may be deployed in close proximity so that wireless communication between the GPS receiver modules may be established.

Abstract: A portable device for drawing the bowstring of a crossbow. The cocking device may be designed to prevent the uneven drawing of the crossbow and may eliminate the complex installation process typically required to retro-fit an existing crossbow with known cocking devices.

Abstract: A crossbow may include a main beam; a compound bow assembly mounted to the main beam; and, a trigger mechanism mounted to the main beam for use in holding a bowstring in a cocked position. The crossbow may include wheels at opposite ends of the bow that operatively receive the bowstring. The wheels may be separated by a wheel distance (WD) when the crossbow is in an un-cocked position. The crossbow may also have a power stroke distance (PD) and the ratio WD/PD may be less than 2.0.

Abstract: An antenna assembly for receiving the GPS signals in a global positioning system (GPS) receiver module automatically orients the antenna to better receive the GPS signals. The antenna is oriented by a positioner (e.g., a counterweight) that automatically rotates a frame on which the antenna is mounted. The GPS receiver module may also include multiple antennas oriented in different directions to maintain good reception of the GPS signals in any position. The multiple antennas are oriented in a manner so that the poor reception range an antenna is covered by other antennas. Signals from multiple antennas may be combined or chosen for processing by a GPS processor. Also, multiple GPS receiver modules may be deployed in close proximity so that wireless communication between the GPS receiver modules may be established.

Abstract: An angled grip may allow a wrist, a palm, and a forearm of an associated user to be substantially aligned when aiming or discharging a weapon. The angled grip may be selectively attachable to the weapon and may comprise a ball joint mount for operatively connecting the angled grip to a weapon. The ball joint mount may comprise a shaft and a spherical portion. The shaft can be fixedly received in a stock of the weapon. The spherical portion can be rotatably received in a socket formed in an end of the angled grip.