Iowa Patent of the Month – October 2021

A key aspect of a compound style shooting bow are the cables which have both a power and control end. The cables look similar to the bowstring and run from one cam to another. The cable and cam work together when an arrow is shot.

The way these cables interact with the cams and limbs of the bow are particularly important. The power end is coupled to the cam on one limb and the control end is coupled to the opposite limb. The design of these couplings is key to efficiency with the current best method being the use of a binary cam system. Even this method results in inefficiency and interference of the arrow’s flight path. Archery Innovators, LLChas developed a shooting bow that uses sliding cables to overcome these inefficiencies.

Their design uses two limbs, two cams, a launch string, and two cables. The launch strings are attached to the cams. Opposing ends of the cables are then attached to the cams as well. The middle portion of these cables are slidably engaged with the cable pulleys. This unique design has the both ends of the cables firmly fixed to the cam while the middle portion floats relative to the pulleys. This allows the cable to self-center itself around the pulley as it stretches and prevents them from crossing the centerline of the shooting bow. 

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