Tension gun for firing arrows
View Patent ↗The invention is directed to a tension gun for firing arrows. The tension gun is comprised of a stock, a trigger, a pistol grip, and a forearm which are configured in a manner which is similar to a conventional crossbow. The bow arms are removed from the design, and replaced by a pair of coaxial coil springs and other tension multipliers within the forearm, which propel the arrow. A folding handle at the forward end of the forearm is provided for carrying the tension gun.
1. A tension gun for firing arrows, comprising:
stock,
a trigger with a trigger guard,
a pistol grip, and
a forearm within which includes a forward coaxial spring segment and a rear coaxial spring segment that are separated by a center spring base, wherein the forward and rear coaxial spring segments are kept in alignment using respective axially positioned alignment rods, and wherein at least the forward and rear coaxial spring segments within the forearm are adapted to propel an arrow placed within the tension gun.
2. The tension gun of claim 1 , wherein a forward end of the forearm is covered by a removable endcap, which is secured by two or more large bolts.
3. The tension gun of claim 1 , further comprising a spring cap attached to each alignment rod and wherein each spring cap is affixed to a pulley yoke.
4. The tension gun of claim 3 , wherein a forward pulley yoke on the forward coaxial spring segment is secured to a forward control pulley by a forward twist control pin, and a rear pulley yoke on the rear coaxial spring segment is secured to a rear control pulley by a rear twist control pin.
5. The tension gun of claim 4 , wherein a stationary end of a cable is fastened to an adjustment mechanism and a length of the cable passes through the forward control pulley and the rear control pulley, terminating in a shuttle mounted in a guide rail.
6. The tension gun of claim 5 , wherein the cable and the alignment rods keep the forward and rear coaxial spring segments in alignment.
7. The tension gun of claim 5 , wherein a folding handle at a forward end of the forearm is provided for carrying the tension gun, mounted on a hinge, which locks in either one of two positions:
a carrying position, wherein the folding handle is extended to enable carrying the tension gun, and
a firing position, wherein the folding handle is folded for of firing the tension gun.
8. The tension gun of claim 5 , wherein squeezing the trigger causes the tension gun to fire.
9. The tension gun of claim 1 , wherein when the tension gun is fired, each of the forward and rear coaxial spring segments urge respective pulley yokes in an outward direction from the center spring base, such that the motion of the pulley yokes is stopped by respective extension damper shafts and extension damper springs.
10. The tension gun of claim 1 , wherein the stock provides a stock aperture and a loading tool which may be used to compress the forward and rear coaxial coil spring segments, and is configured for storage in the stock aperture when not in use.