US Patent 8485170 Projectile launcher with internal bow

The projectile launcher with internal bow includes a riser base, an elongate barrel assembly attached to the riser base, a crank mechanism attached to the back of the barrel assembly, a trigger assembly, and an internal bow assembly mounted to the riser base. The crank assembly includes a rotatable crank for selective reciprocation of a cocking pawl carriage riding inside a rail system in the barrel assembly. A biased cocking pawl in the pawl carriage selectively engages a projectile stirrup carriage riding on top of the rail system to push the stirrup carriage into a cocked position. The internal bow assembly includes reversed and vertically spaced, upper and lower resilient bow arms and respective pulleys and cables interconnecting the bow arms and the stirrup carriage. Cocking of the stirrup carriage flexes the bow arms in preparation for placement and firing of a projectile.