Patent ID: 6871643

Claim:
A pair of pulley members for use in the bow string rigging of a compound archery bow, the pair comprising: a control pulley adapted to rotate about a first axle, said control pulley comprising; a control string cam defining a control string groove operable to wrap and unwrap a first end portion of a drawstring for said bow, said control cam carrying: a first anchor for a first end of said drawstring; a second anchor for a first end of a power cable; and a third anchor for a first end of a control cable; a power cam defining a power cable groove, in a plane approximately parallel to a first plane containing said control string groove and operable to space said power cable away from said first axle by a variable radius; and a timing cam defining a timing groove, in a plane approximately parallel to said first plane and operable to space said control cable apart from said first axle; and a follower pulley adapted to rotate about a second axle, said follower pulley comprising: a follower string cam defining a follower string groove operable to wrap and unwrap a second end portion of said drawstring, said follower cam carrying: a first anchor for a second end of said drawstring; and a second anchor for a second end of said control cable; a follower cam defining a control cable groove, in a plane approximately parallel to a plane containing said follower string groove and operable to space said control cable apart from said second axle by a variable radius.