Muzzleloading rifle with pivotal bolt action

What is this patent about?

’467 is related to the field of muzzleloading firearms and specifically addresses the mechanical challenges of adapting modern bolt-action cycling to rifles that utilize a breech plug and percussion cap ignition. Traditional muzzleloaders often rely on cumbersome external hammers or complex inline systems that are difficult to clean and slow to cycle. The invention seeks to bridge the gap between the reliability of a center-fire bolt action and the specific geometry required for a muzzleloader’s receiver and barrel interface.

The underlying idea behind ’467 is a pivoting-reciprocal bolt geometry that allows the action to unlock through a lateral swing rather than a traditional rotation. By using a rear-mounted pivot point, the entire bolt body can swing outward through a side slot in the receiver. This lateral movement is mechanically linked to a transverse cross lug that serves as the primary locking interface. When the bolt is swung out, the lug disengages from the receiver walls, allowing the assembly to slide rearward and expose the breech for priming.

The claims of ’467 focus on the interconnected movement between the bolt handle, the transverse locking lug, and the internal striker pin. The mechanism is designed so that pulling the bolt handle laterally not only unlocks the action but also prepares the striker for cocking. The independent claims describe a system where the bolt is operatively connected to an elongated striker pin, using the forward return stroke of the bolt to compress a spring and set the pin against a trigger sear, effectively automating the cocking process during the loading cycle.

In practice, the shooter operates the rifle by swinging the bolt handle outward, which retracts the locking head from an arcuate notch in the receiver. As the bolt is pulled back, it clears the loading port, providing unobstructed access to the breech plug for placing a percussion cap. When the bolt is pushed forward and snapped back into alignment with the receiver, the striker pin is captured by the trigger mechanism while the bolt body moves forward to enclose the cap, ensuring a sealed and safe firing chamber.

This design differs from prior approaches by eliminating the need for a rotating bolt head, which can be difficult to engineer around the fixed breech plugs of muzzleloaders. By utilizing a lateral pivot and a sliding cross lug, the invention provides a robust lockup that can withstand high pressures while maintaining a slim receiver profile. The integration of the cocking cycle into the bolt’s longitudinal travel ensures that the rifle is ready to fire as soon as the action is closed, mimicking the efficiency of a modern sporting rifle.