Patent ID: 9303943
Filing Date: 2016-04-05
CPC Classification: F41B

Claim Text:
1. A stringed weapon comprising: a body structure; a string having two ends and a nock point along a length therebetween; a torsional spring located within said body structure; and a string spool located within said body structure, said spool including sections of at least two different circumferences; wherein, both ends of said string are connected to said string spool and said string spool is functionally connected to said torsional spring so that drawing said nock point in a first direction serves to unwind said string from said spool in a first direction, said rotation of said spool in said first direction applying force to said spring so as to increase the potential energy of said spring; and wherein release of said string allows said spring to release said potential energy by rotating said spool in a second direction opposite said first, said release of potential energy rewinding said string on said spool and firing a projectile located at said nock point from said weapon.