Two-track system for dual cam compound bow

Abstract

The present invention comprises a two-track cam assembly wherein the cam assembly has a bowstring component for housing the bowstring and a power cable component that allows for the take up and let out of the power cable on opposing ends of the power cable component, effectively creating a two-track cam assembly. The efficiency rating of the device achieves 95.8%. The cam assembly can come in a unitary or modular form and further each component (i.e. the bowstring or power cable component) can be in a circular or non-circular form.

1 . A compound bow comprising:
 a handle portion;   two limb portions each having at least one cam assembly rotatably mounted on a limb;   the cam assembly comprising:
 a bowstring cam component having a track for receiving a bowstring; 
 a power cable cam component having a take up portion and a let out portion; the take up portion and let out portion each comprise a track for receiving a power cable; the tracks for the take up portion and let out portion are substantially coplanar. 
   
   
   
       2 . The compound bow of  claim 1  further comprising:
 two power cables; and   a bowstring;   wherein the first power cable is anchored to the first cam assembly with a portion adjacent to the first end sitting in the take up portion track of the power cable cam component on the first cam assembly and at its second end is anchored to the second cam assembly with a portion adjacent to the second end sitting in the let out portion track of the power cable cam component on the second cam assembly;   wherein the second power cable is anchored to the first cam assembly with a portion adjacent to the first end sitting in the let out portion track of the power cable cam component on the first cam assembly and at its second end is anchored to the second cam assembly with a portion adjacent to the second end sitting in the take up portion track of the power cable cam component on the second cam assembly;   such that the respective power cables while sitting in the tracks are coplanar.   
   
   
       3 . The compound bow of  claim 1  wherein the tracks on the take up portion and the let out portion of the power cable cam assembly are part of a continuous track around at least a portion on the periphery of the power cable cam assembly. 
   
   
       4 . The compound bow of  claim 1  wherein the tracks on the take up portion and the let out portion of the power cable cam assembly are non-continuous tracks on the periphery of the power cable cam assembly.