Patent ID: 6776148
Filing Date: 2004-08-17
Classification: F41B

Abstract:
A compound archery bow having upper and lower bowstring cams on which a bowstring is carried, in which the bow includes a riser having an upper end and a lower end, upper and lower resilient power limbs each having an inboard end affixed respectively to the upper and lower ends of the riser and an outboard end, synchronizing means for ensuring equal flexing of said upper and lower power limbs upon draw and release of said bowstring; said upper and lower bowstring cams each being rotatably held at an axis at an the outboard end of the respective one of said power limbs; and upper and lower power cam arrangements, each having one or more inboard cams rotatably held at a rigid portion of the riser, one or more outboard power cams affixed onto the associated bowstring cam to rotate therewith, and one or more flexible inextensible cam cables extending over the periphery of the associated inboard and outboard power cams, with the cam cables and the inboard and outboard power cams cooperating to determine draw characteristics of said bow; and wherein said bowstring cams are provided with a cam profile such that the radius from the axis thereof to a tangent with said bowstring, diminishes as the bowstring is drawn and increases as the bowstring returns after release from a drawn position.