An elastic energy storage and deployment system deploys a torsional spring that bias a cam connected to a cable. The cam is coupled to the torsion spring about a shared rotational axis such that the cam directs elastic energy to and from the torsion spring and the cable transforms rotational force into linear motion, with little rotational inertia, and the addition of angular acceleration.

A cable tensed between a pair of large and small diameter cams of a bow and elastically deformed to generate an elastic force for rotating the pair of large and small diameter cams and a pair of string cams rotated integrally with the pair of large and small diameter cams in a reverse direction when the string is drawn to rotate the pair of large and small diameter cams are rotated. The cable has: a first high-elasticity raw thread wound around one of the pair of large and small diameter cams; a second high-elasticity raw thread wound around the other of the pair of large and small diameter cams; and a low-elasticity raw thread which connects the first high-elasticity raw thread with the second high-elasticity raw thread, the low-elasticity raw thread being elastically deformed more easily than the first high-elasticity raw thread and the second high-elasticity raw thread.

A toy bow assembly that is used to launch toy projectiles. The toy bow assembly includes a handle that is used to grasp the toy. The handle has opposite ends. Two arm subassemblies extend from the opposite ends of the handle, wherein the arm subassemblies can articulate between folded positions and extended positions. The arm subassemblies have a spring bias that biases the arm subassemblies into extended positions. Catches are provided in the toy bow assembly for retaining the arm subassemblies in folded positions when the arm subassemblies are articulated into folded positions against the spring bias. Releases are present on the handle that retracts the catches, enabling the arm subassemblies to respond to the spring bias and spring from their folded positions to their extended positions.

A modular survival tool including a tool body having a tomahawk axe selectively disposed on a top end thereof, a storage compartment therein, a pair of forward protrusions to which a pair of limb members forming a bow are selectively mounted for storage, a pair of angled rearward protrusions are disposed on a rear side of the tool body and the limb members attached thereto to form the bow, and a bow string attached to upper ends of the rearward protrusions. A modular arrow has connectable components stored within the storage compartment but assemble into an arrow for use with the bow. At least one arrow rest is disposed on one of a right side and a left side of the tool body to assist in aiming the arrow. A fire starting surface is disposed on a removable cap over the bottom end, which provides access to the storage compartment.

Devices, assemblies and methods are described for launching a projectile. A launching device includes a support extending along a first plane and having an outward surface and an inward surface spaced from the outward surface, the inward surface defining a space. The launching device further includes first and second elastic members extending between opposing first and second elastic member ends, respectively. The first and second elastic member ends are coupled to the support with the first elastic member ends spaced from each other and the second elastic member ends spaced from each other. The launching device further includes a handle grip coupled to the support and extending along a second plane perpendicular to the first plane.

A crossbow assembly uses an arrangement with two pairs of limbs, with one pair of opposing limbs on each side of the stock. The two limbs within each pair are arranged in opposition to each other in a vertical plane. The limb tips are each connected to an axle assembly with respective limb cables. The axle has a pair of axle pulleys at opposing ends. A bowstring has opposing ends connected to each axle pulley. The bowstring extends forward from each axle pulley and extends across the stock, passing between two bowstring pulleys. The middle of the bowstring forms the nock point.

Embodiments of the present disclosure provide a bow and a method for reducing torque. An exemplary bow includes a riser having a pair of limbs having a string assembly operably coupled to each one of the pair of limbs, the riser with the pair of limbs operable to maintain a tension in the string assembly. The bow further includes a handle, the handle having a ball joint maintained in the handle operable to rotate relative to the handle, wherein the handle is rotatably affixed to the riser at the ball joint free floating bow including a riser having two ends, and a pair of limbs, each extending from one end of the riser.

A bow includes a handle and upper and lower limbs. The upper and lower limbs are formed of a laminated fiber-reinforced plastic material. The upper limb has first and second sets of fiber sheets stacked in a direction along a lateral axis. The first set of fiber sheets have fibers aligned at a first angle from a longitudinal axis, and the second set of fiber sheets having fibers aligned at a second angle from the longitudinal axis in an opposite direction. The lower limb has third and fourth sets of fiber sheets stacked in a direction along the lateral axis. The third set of fiber sheets have parallel fibers aligned at a third angle from the longitudinal axis, and the fourth set of fiber sheets having fibers aligned at a fourth angle from the longitudinal axis in an opposite direction. The angles are between 16 and 44 degrees.

A bow-type throwing tool includes a central body, a nocking string for an arrow, and elastic energy storage mechanism operated by the traction of the string. The elastic energy storage mechanism includes: two opposed primary levers connected with hinging to the central body, the nocking string being constrained by its opposite ends to opposite free ends of the primary levers; two opposed axial action thrust accumulators, defined on the central body; a loading element of the axial action thrust accumulators configured to induce a compression in the thrust accumulators following a traction of the nocking string.

A crossbow is configured to shoot a projectile. The crossbow includes a frame defining a horizontal projectile plane. The projectile moves within the horizontal projectile plane when the crossbow is fired. The crossbow includes pulleys and cams to improve performance of the crossbow.