Orthopedic Impactor Tool Independent Axes Linear Motion Converter

The patent replaces traditional mechanical motion conversion mechanisms (such as cam-follower systems, crank-connectors, or gear systems) with a direct electromagnetic linear actuator. The linear actuator converts electrical energy directly into linear motion, eliminating the need for intermediate mechanical conversion components. This substitution achieves high energy conversion efficiency (direct electromagnetic-to-mechanical energy conversion) while significantly reducing device complexity by removing multiple mechanical parts and their associated tolerances, wear points, and alignment requirements.

The linear actuator system is designed with a controlled deceleration phase that applies counter-action before the impactor head contacts the bone. The system pre-charges the electromagnetic field and controls the current waveform to create a smooth acceleration profile, then deliberately reduces current before impact to minimize rebound. This preliminary anti-action prevents excessive recoil by counterbalancing the impact force through controlled electromagnetic braking, and reduces noise by eliminating sudden mechanical reversals and vibrations.

The patent employs advanced material science parameter changes by using high-strength, low-density materials such as titanium alloys or carbon-fiber-reinforced polymers for the impactor head and housing. These materials provide exceptional strength-to-weight ratios, allowing the tool to withstand high impact forces while maintaining a compact size. Additionally, the linear actuator uses optimized electromagnetic parameters (magnetic field strength, coil density, core material) to deliver high force in a small package, avoiding the need for large mechanical components that would increase tool size.