Firearm Recoil Spring With Dead Coils for Wear Reduction

The recoil spring is divided into three distinct segments: active coils that provide recoil force, dead coils that dampen vibrations, and a transition zone. This segmentation allows different portions of the spring to perform specialized functions, with dead coils reducing internal friction and vibration that would otherwise cause wear in the active coils, thereby maintaining spring rate consistency throughout the service life.

Dead coils are positioned at strategic locations along the spring to provide beforehand cushioning against excessive vibrations and shocks during recoil operation. This prior cushioning protects the active coils from harmful vibrations that accelerate wear and rate reduction, extending the spring's reliable service life while maintaining consistent performance.

The spring structure is segmented into functionally distinct zones (active coils, dead coils, transition zones) that can be manufactured using standard spring-making processes. This segmentation achieves enhanced durability through functional specialization without requiring complex manufacturing methods or additional components, thus extending service life while maintaining manufacturing simplicity.

The spring design utilizes parameter changes in coil configuration (from active to dead coils) along its length to achieve different mechanical properties in different zones. This allows a single continuous spring structure to provide both durability and extended service life without increasing overall structural complexity, as the variations are achieved through geometric parameter changes rather than additional components.