Dual-Axis Spool Fishing Reel for Line Twist Compensation

The patent applies this principle by changing the rotation from a single transverse axis to a dual-axis system. The spool rotates about a first transverse axis during normal retrieval operations, and simultaneously rotates about a second transverse axis that is perpendicular to the first axis. This dual-axis rotation creates a twisting motion that counteracts the line twist accumulated during casting, thereby eliminating the harmful tangling effect while maintaining efficient line retrieval.

The patent applies this principle by replacing the traditional mechanical frictional drag mechanism with a fluid-based drag system. A viscous fluid is positioned between the spool and a drag plate, where the fluid provides drag resistance through viscous shear forces. This fluid dynamic approach eliminates the need for complex mechanical friction components such as cam mechanisms or adjustable friction plates, thereby reducing mechanical complexity while maintaining the ability to retard line pay-out and tire fish.

The patent applies this principle by utilizing the temperature-dependent viscosity characteristics of the viscous fluid. Instead of requiring precise manufacturing control of the fluid's viscosity, the system exploits the natural variation of viscosity with temperature. As water temperature changes during fishing conditions, the fluid viscosity automatically adjusts, providing a self-regulating drag mechanism. This thermal parameter change approach simplifies the drag system while using environmental temperature as the control variable.