US Patent 9310155 Compound bow system

Certain embodiments of the present disclosure describe a compound archery bow that has a rigid vertical riser structure. At least one flexible limb extends rearward from the vertical riser structure. One end of the flexible limb is secured to the cable arrangement of the compound bow, so that when the bowstring is drawn, the flexible limb is flexed toward the cams of the bow. As the flexible limb is bent, it stores energy that is transferred to an arrow when the bowstring is released.