Patent ID: 7770568

Claim:
A method for constructing an archery bow, the method comprising: mounting a first flexible bow limb and a second flexible bow limb at opposite ends of and projecting substantially symmetrically from a handle; rotatably mounting a first cam assembly on the first bow limb, the first cam assembly comprising a draw cable journal, a power cable take-up mechanism, and a power cable let-out mechanism; rotatably mounting a second cam assembly on the second bow limb, the second cam assembly comprising a draw cable journal, a power cable take-up mechanism, and a power cable let-out mechanism; securing a draw cable at a first end thereof to the first cam assembly received in the draw cable journal thereof; securing the draw cable at a second end thereof to the second cam assembly received in the draw cable journal thereof; securing a first power cable at a first end thereof to the first cam assembly engaged with the power cable take-up mechanism thereof; securing the first power cable at a second end thereof to the second cam assembly engaged with the power cable let-out mechanism thereof; securing a second power cable at a first end thereof to the second cam assembly engaged with the power cable take-up mechanism thereof; securing the second power cable at a second end thereof to the first cam assembly engaged with the power cable let-out mechanism thereof; arranging the first and second cam assemblies so that drawing the bow results in: (i) the draw cable being let out from the respective draw cable journals of the first and second cam assemblies, (ii) rotation of the first and second cam assemblies, (iii) the first end of the first power cable being taken up by the power cable take-up mechanism of the first cam assembly and the second end of the first power cable being let out by the power cable let-out mechanism of the second cam assembly, and (iv) the first end of the second power cable being taken up by the power cable take-up mechanism of the second cam assembly and the second end of the second power cable being let out by the power cable let-out mechanism of the first cam assembly; and arranging the first and second cam assemblies so as to avoid 100% let-off of the draw force or so as to prevent cocking of the bow, wherein draw force versus draw distance for the archery bow is at least in part determined by a rate of take-up of the first power cable by the first cam assembly relative to a rate of let-out of the first power cable by the second cam assembly, and by a rate of take-up of the second power cable by the second cam assembly relative to a rate of let-out of the second power cable by the first cam assembly.