US12613074 - Archery bow with axial tensile springs and slope-based CAMS
An archery bow includes a riser, a cam module rotatably mounted to a fixed pivot supported by the riser, and an energy storage system comprising at least one axial tensile spring operatively coupled to the cam module via a multi-roller shuttle assembly. The cam module includes a cam track with a variable slope profile that governs the draw force curve during rotation. The multi-roller shuttle assembly engages both the cam track and a guide track surface to constrain the shuttle to a defined path, thereby elongating the axial tensile spring as the bow is drawn. The cam module includes parallel string grooves for engaging a single bowstring without synchronization cables. The axial tensile spring may be folded around a turning element to form two tensile legs and housed within the riser. This configuration enables compact, lightweight bows with customizable draw characteristics and reduced lateral torque.